Physics Unit8: Rotational Motion - https://webassign.org

1#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

Angular displacement is usual zvlmhl a8 v3z+8rfl/skk,d46ly express in units of

A. meters.

B. radians.

C. revolutions.

D. arcs.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

2#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

Angular velocity is exjw x6o)-dd 3,n;vv jxvpressed in units of

A. meters per second.

B. radians per second.

C. omegas per second.

D. arcs per second.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

3#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

Angular acceleration is expressed;( +,lib.cvdu q6xedq in units of

A. meters per second squared.

B. radians per second squared.

C. alphas per second squared.

D. arcs per second squared.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

4#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A boy and a girl are riding on a merry-go-round which is turning 3. l2z zrt c4vfbjvt57at a constant rate. The boy is near the outer edge, and the girl is closer to the center. Who has the grzcz7r.tft32 ljvv4b 5eater angular displacement?

A. the boy

B. the girl

C. Both have the same non-zero angular displacement.

D. Both have zero angular displacement.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

5#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A boy and a girl are riding on a merry-go-roucm(db .z2shyao t 2 e)t(9ru(k0mtcj0 d3)dnmnd which is turning at a constant rate. The boy is near the outer edge, and the girl is cbd.039t(ut2t 2()zcm kh0c (dyd)me os nmjar loser to the center. Who has the greater angular speed?

A. the boy

B. the girl

C. Both have the same non-zero angular velocity.

D. Both have zero angular velocity.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

6#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A boy and a girl are riding on a merry-go-round which is3*n28/rych*ct9auo 8 yvd mc r turning at a constant rate. The rva t *comdy8/c2n yur98 hc*3boy is near the outer edge, and the girl is closer to the center. Who has the greater linear speed?

A. the boy

B. the girl

C. Both have the same non-zero translational velocity.

D. Both have zero translational velocity.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

7#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A boy and a girl are riding a merry-go-round which is turning )mcfr2:b*w-4,ongqef* pub k at a constant rate. The boy is near the outer edge, while the girl is closer to the center. Who has the greater centripetal awrbc:q*u-, bem4* f)f k p2goncceleration?

A. the boy

B. the girl

C. Both have the same non-zero centripetal acceleration.

D. Both have zero centripetal acceleration.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

本Practice全部题目来源于https://webassign.org，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

Mark Problem

8#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A boy and a girl are riding a merry-go-round which is turning at nqotct /(ta,7a constant rate. The boy is near the outer edge, while ( actn,/ot tq7the girl is closer to the center. Who has the greater tangential acceleration?

A. the boy

B. the girl

C. Both have the same non-zero tangential acceleration.

D. Both have zero tangential acceleration.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

9#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

Consider a rigid body that is rotating. Which of the following is an accurate s 3+pnki+e yi)xhi p:bdtq (0;ltat3tn ih0y +pl)eiq+ b;idkp :(xement?

A. Its center of rotation is its center of gravity.

B. All points on the body are moving with the same angular velocity.

C. All points on the body are moving with the same linear velocity.

D. Its center of rotation is at rest, i.e., not moving.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

本Practice全部题目来源于https://webassign.org，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

Mark Problem

10#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

Rolling without slippingn,t5l*i;m1vgsvi 5p c depends on

A. kinetic friction between the rolling object and the ground.

B. static friction between the rolling object and the ground.

C. tension between the rolling object and the ground.

D. the force of gravity between the rolling object and the Earth.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

11#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

Two equal forces are applied to a do3h4 fo)dzj sl2pxw hb: gb:k-:or. The first force is applied at the midpoint of the door; the second force is applied 3jd) :b:z l2sph4bwkxgof h:-at the doorknob. Both forces are applied perpendicular to the door. Which force exerts the greater torque?

A. the first at the midpoint

B. the second at the doorknob

C. both exert equal non-zero torques

D. both exert zero torques

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

12#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

Two equal forces are applied to a door at the doorknob. The first force is ap3oa:1iphc es1plied perpendicular to the door; the second force is ph: isa311e coapplied at $30^{\circ}$ to the plane of the door. Which force exerts the greater torque?

A. the first applied perpendicular to the door

B. the second applied at an angle

C. both exert equal non-zero torques

D. both exert zero torques

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

13#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

Two forces are applied to a doorknob, pgr8 zn pb:x14perpendicular to the door. The first force is twice as large as the second 4 ppr: xbz1gn8force. The ratio of the torque of the first to the torque of the second is

A. 1/4.

B. 1/2.

C. 2.

D. 4.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

14#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

What is the quantity used to measure an object's res.pv 55 zauwf8r(q h/h 2jli3lhd/azi*;ei k:iistance to changes in rotatiqi(a;e2v p 5z: i5h.j/f iwk/ud8ll i3az* rhhon?

A. mass

B. moment of inertia

C. torque

D. angular velocity

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

15#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

Consider two uniform solid spheres where both have the same diameter, but one he, s6g: ooqtr0oda)d ;as twice the mass of the other. The ratio of the larger moment of inertia to tha,:rtd osqe6g; do)o0 at of the smaller moment of inertia is

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

16#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

Two uniform solid spheres have the seyr keor(s 2+4ame mass, but one has twice the radius of the other. The r eo+ er4sr(2kyatio of the larger sphere's moment of inertia to that of the smaller sphere is

A. 4/5

B. 8/5

C. 2

D. 4

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

17#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

Consider two uniform solid spheres where one has twij i6xhkn9tj7+ ce the mass and twice the diameter of the other. The ratio of the larger moment of inertia to that of the smaller moment of inertia 9+k7xhn6ji jt is

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

18#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A uniform solid sphere has mass M and radius R. If these are increased to 2M aqu41 9ie4url end 3R, what happens to the sphere's moment of inertia about a central que l1 eir494uaxis?

A. increases by a factor of 6

B. increases by a factor of 12

C. increases by a factor of 18

D. increases by a factor of 54

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

本Practice全部题目来源于https://webassign.org，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

Mark Problem

19#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

If a constant net torquo(m.(uvim3 +vz j y7qse is applied to an object, that object will

A. rotate with constant angular velocity.

B. rotate with constant angular acceleration.

C. having an increasing moment of inertia.

D. having a decreasing moment of inertia.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

20#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

The moment of inertia of a solid cylinder abou .le95 fnmn2dct its axis is given by 0.5 MR2. If this cylinder rolls without slipping, the ratio of itse.9m fncnd l52 rotational kinetic energy to its translational kinetic energy is

A. 1:1

B. 1:2

C. 2:1

D. 1:3

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

21#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

Consider a motorcycle of mass 150 kgx:9ce e:,t3 on.pagq23 ehya c, one wheel of which has a mass of 10 kg and a radius of 30 cm. What is the ratio of the rotational kinetic energy of the wheels to the total translational kinetic energy of 2 eo,3p:c naegext 3 9h:yqa.cthe bike? Assume the wheels are uniform disks.

A. 0.033:1

B. 0.067:1

C. 0.33:1

D. 0.67:1

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

22#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

Suppose a solid sphere of mass M and radius R rolls w8)7du3 (gmj wose:ytur 9m5a without slipping down an inclined plane starting from rest. The linear velocity of the sphere at the bottom of the inclindao3e:s 7r85 9gyw)ut( jmwum e depends on

A. the mass of the sphere.

B. the radius of the sphere.

C. both the mass and the radius of the sphere.

D. neither the mass nor the radius of the sphere.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

23#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

Suppose a solid sphere of mass M and radius R rolls without slipping down an u*no0d w0x2ita xe1dl0 *, x6yo5nag pinclined plane starting from rest. The anp6wtde al01x*ad,02o nuy 0g*5x noxigular velocity of the sphere at the bottom of the incline depends on

A. the mass of the sphere.

B. the radius of the sphere.

C. both the mass and the radius of the sphere.

D. neither the mass nor the radius of the sphere.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

24#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

"The total angular momentum of wn4c*3fnwbe13d ( lkua system of particles changes when a net external force actsncfewk3 *l 4 d(unw3b1 on the system." This statement is

A. always true.

B. never true.

C. sometimes true. It depends on the force's magnitude.

D. sometimes true. It depends on the force's point of application.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

本Practice全部题目来源于https://webassign.org，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

Mark Problem

25#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

In what circumstances can the angular velocity 0y +;w/v3uo lzmkv9,lf n 9umqof system of particles change without any changn/lu+om9ukfz3y,lvqv m 90;we in the system's angular momentum?

A. This cannot happen under any circumstances.

B. This can happen if a net external force acts on the system's center of mass.

C. This can happen if the only forces acting are internal to the system.

D. This can happen if an external net torque is applied properly to the system.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

本Practice全部题目来源于https://webassign.org，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

Mark Problem

26#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

The Earth orbits the Sun in an ellipticala +,flmhk l)4e orbit. Ignore any friction which may be presal)f h+ml,e k4ent. What happens over time to the Earth's angular momentum about the Sun?

A. It continually increases.

B. It continually decreases.

C. It remains constant.

D. It increases during some parts of the orbit, and decreases during others.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

本Practice全部题目来源于https://webassign.org，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

Mark Problem

27#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

The Earth moves about the Sun in an ellipx7 pvwiz(v 6(ktical orbit. As the Earth moves close to the Sun, then which of the following best describes the orbiting speed p 7wi(6(vkvzxof the Earth about the Sun?

A. increases

B. decreases

C. remains constant

D. none of the above

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

28#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

An ice skater performs a pirouette (a fast spin) by pullingx8tt(tjonl94 -h4slv*( lr t.7ckoh x in his outstretched arms close to his bo vt7(xt rc-o8 xoh* 4nkltjst(4l9lh .dy. What happens to his angular momentum about the axis of rotation?

A. It does not change.

B. It increases.

C. It decreases.

D. It changes, but it is impossible to tell which way.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

本Practice全部题目来源于https://webassign.org，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

Mark Problem

29#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

An ice skater performs a pirouette (a fasv. xdorml,l9(z 21ol st spin) by pulling in his outstretched arms close to his body. What happens to his rotat sl9(dxlzlov,o2m 1. rional kinetic energy about the axis of rotation?

A. It does not change.

B. It increases.

C. It decreases.

D. It changes, but it is impossible to tell which way.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

30#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

An ice skater performs a pirouett s +j5lqioy7lqj a,5j1e (a fast spin) by pulling in his outstretched arms clos y5j ljsj1q5i,l ao+q7e to his body. What happens to his moment of inertia about the axis of rotation?

A. It does not change.

B. It increases.

C. It decreases.

D. It changes, but it is impossible to tell which way.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

31#

Free-Response ( 1.0 marks) Whole-Paper View Save Problem

State the law of conservation of angul1),;sb;x om bi/cz7mbjst)cbar momentum.

该题自我估分: (必填) (满分:1.0分)

绑定到本题的附件链接:
绑定到本题的上传图片: (问答题类型题目图片/附件必须插入上方文本框，否则会被移除题目绑定)

Correct Answer:

Join the discussion for this question

Mark Problem

32#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

What arc length does t;a0ejgh: su3k 7ll 0ldhe Earth travel in a three month period in its nearly circular orbit about the Sun with a rad 3a; :esdljlu0 0lkgh7ius of $1.5 \times 10^{11} \; m$?

A. $1.2 \times 10^{11} \; m$

B. $1.8 \times 10^{11} \; m$

C. $2.4 \times 10^{11} \; m$

D. $3.0 \times 10^{11} \; m$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

33#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

The second hand of a clock has a length of 0.30 m8:0ijysrh3amhm:jpzl ,57 q s qlmd /7. What distance does the tip of the second hand sweep throuy38dslm 7 h lma,ij70zr q:s/m:j5qhpgh in 3 minutes and 45 seconds?

A. $1.1 \; m$

B. $1.8 \; m$

C. $7.1 \; m$

D. $13 \; m$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

34#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

How many rad/s is 25 revolutions per minute equivalent totaso(tcpf)9j6zw* zpn pz*43q8 ky u9?

A. 0.42 rad/s

B. 2.6 rad/s

C. 160 rad/s

D. 240 rad/s

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

35#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A bicycle wheel rotates uniformly through 2.0 revolutions p i-qlsr23z6t in 4.0 s. What is the frequency of the wheelr2 6-s tp3zilq's rotation?

A. $0.50 \; Hz$

B. $1.0 \; Hz$

C. $2.0 \; Hz$

D. $4.0 \; Hz$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

36#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A pulsar (a rotating neutrnx:g dd- a9vj2on star) emits pulses at a frequency of 0.40 kHz. The period of its rotatiod :n-9dvg2xjan is

A. 2.5 ms.

B. 2.5 s.

C. 0.025 s.

D. 25 ms.

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

37#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A phonograph record rotateso+j nv dhc,2 .lalyl*y +ga,*x at 45 rpm. Through what angle does it turn in 0.20 s?aal y,2voy ++ljhnxg,ld c.**

A. $9.0^{\circ}$

B. $15^{\circ}$

C. $54^{\circ}$

D. $96^{\circ}$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

本Practice全部题目来源于https://webassign.org，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

Mark Problem

38#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A wheel of diameter 26 cm turns at 1s6rgy riqfhcu8 m i 8,8r)*6dx500 rpm. How far will a point on the outer rim move in 2. 86,id86mqyc)x *fhsg r8ruir 1 s?

A. $3.1 \; m$

B. $41 \; m$

C. $90 \; m$

D. $180 \; m$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

39#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A bicycle wheel rotates uniformly through 2.0 re ydf48q6cb d j /kfkt,yhkq5,7volutions in 4.0 s. What is the average an8,54 fqtk 6q/jdyhbkydkf7c ,gular speed of the wheel?

A. 0.79 rad/s

B. 1.6 rad/s

C. 3.1 rad/s

D. 6.3 rad/s

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

40#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A bicycle wheel rotates uniformly through 2.0 revolutions in 4.0 s. kwbq.s8 td/ ;hWhat is the linear speed of a point 0.;tb/hd s k8wq.10 m from the center of the wheel?

A. 0.63 rad/s

B. 0.31 rad/s

C. 0.16 rad/s

D. 0.079 rad/s

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

41#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A cable car at a ski resort carries skiers a dist7ak)s r1cugt0n0+ek konk /1qance of 6.8 km. The cable which moves the car is driven by a k 0keoatq+snukgkcr0n / 7)11pulley with diameter 3.0 m. Assuming no slippage, how fast must the pulley rotate for the cable car to make the trip in 12 minutes?

A. $9.4 \; rpm$

B. $30 \; rpm$

C. $60 \; rpm$

D. $720 \; rpm$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

42#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A wheel of radius 1.0 m is rotating with y :qa r5ksm1b3a constant angular speed of 2.0 rad/s. What is15k:3q am rsyb the linear speed of a point on the wheel's rim?

A. 0.50 m/s

B. 1.0 m/s

C. 2.0 m/s

D. 4.0 m/s

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

本Practice全部题目来源于https://webassign.org，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

Mark Problem

43#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

The cutting cord on a gas-powered weed cutter is 0.16 m in length. Ifxgf2 ytkz8l2: the motor rotates2l8ty2gxzf k: at the rate of 20 rev/s, what is the approximate linear speed of the end of the cord?

A. 20 m/s

B. 25 m/s

C. 35 m/s

D. 65 m/s

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

44#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A wheel of radius 1.0 m is rotating with -qdl3 6m+cvmpqmcho3o96, *kzds2x oa constant angular speed of 2.0 rad/s. What is the centrip62do oo zms+p*kh cvq6dc,mxm393ql-etal acceleration of a point on the wheel's rim?

A. $0.50 \; m/s^2$

B. $1.0 \; m/s^2$

C. $2.0 \; m/s^2$

D. $4.0 \; m/s^2$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

45#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

What is the centripetal acceleration of 34vuxbci gygl :)(;fra point on the perimeter of a bicycle wheel of diameter 70.0 cm when the bike is movic (3y r g;v:ubfl4ix)gng 8.00 m/s?

A. $91.0 \; m/s^2$

B. $183 \; m/s^2$

C. $206 \; m/s^2$

D. $266 \; m/s^2$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

46#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

How many revolutions per m np)ht. catq*mau3 n9:inute (rpm) must a circular, rotating space station (r nhm pt u a.*a:ctq3n)9= 1000 m) rotate to produce an artificial gravity of $9.80 \; m/s^2$?

A. $0.95 \; rpm$

B. $0.83 \; rpm$

C. $0.075 \; rpm$

D. $0.094 \; rpm$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

47#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A car is negotiating a flat circular curve of radius 50 m with a spc u )*5z/;jnhnqsf,czeed of 20 m/s. The maximum ,z; ju*hcfn nzqs )5/ccentripetal force (provided by static friction) is $1.2 \times 10^{4} \; N$. What is the centripetal acceleration of the car?

A. $0.40 \; m/s^2$

B. $0.80 \; m/s^2$

C. $4.0 \; m/s^2$

D. $8.0 \; m/s^2$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

48#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A car is negotiating a flat circular curve of radius 50 m3y qv5rhn0cb; with a speed of 20 m/s. The maximum centripetal force (provided by static frictiqr3b;nv0c 5 hyon) is $1.2 \times 10^{4} \; N$. What is the mass of the car?

A. $0.50 \times 10^{3} \; kg$

B. $1.0 \times 10^{3} \; kg$

C. $1.5 \times 10^{3} \; kg$

D. $2.0 \times 10^{3} \; kg$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

49#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A 0.300-kg mass, attached to the end of a 0.750-m string, is whirled around inh/2.ju kb.(-is2 msshmx;y ec1aqc. f a smooth level table. If the maximum tension that the string can withstand is 250 N, then what maximum linear speed can the mass / ms. (chm2jsq-he2bis fx a.1c.kuy; have if the string is not to break?

A. 19.4 m/s

B. 22.4 m/s

C. 25.0 m/s

D. 32.7 m/s

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

本Practice全部题目来源于https://webassign.org，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

Mark Problem

50#

Fill-in-Blank ( 1.0 marks) Whole-Paper View Save Problem

A bowling ball of mass 7.5 kg and radius 9.0 cm rolls without slipping 10 m down ,ujgjmc g;0,b g)b(bo a lane at 4.3 m/ub(jgg)b0o,m cj; ,bgs.
(a) Calculate the angular displacement of the bowling ball.   rad ( fill in numbers only)
(b) Calculate the angular velocity of the bowling ball   rad/s ( fill in numbers only)
(c) Calculate the radial acceleration of the bowling ball    $m/s^2$ ( fill in numbers only)
(d) Calculate the tangential acceleration of the bowling ball    $m/s^2$ ( fill in numbers only)

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

51#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A wheel accelerates with a constant angular accelpmgmmd4 q 8.rp aq v/2n9c-eu5eration of $4.5 rad/s^2$. If the initial angular velocity is 1.0 rad/s, what is the angle the wheel rotates through in 2.0 s?

A. $11 \; rad$

B. $9.0 \; rad$

C. $7.0 \; rad$

D. $4.5 \; rad$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

52#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A wheel accelerates with a constant ang /c2 4dtpkiq a0tbph ,;a46munular acceleration of $4.5 rad/s^2$. If the initial angular velocity is 1.0 rad/s, what is the angular velocity at t = 2.0 s?

A. 1.0 rad/s

B. 7.0 rad/s

C. 9.0 rad/s

D. 10 rad/s

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

53#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

How many radians does a 0.300-m radius automobile tire rafr. i8dzzlcmsm/,c +, )l0g qotate after starting fro qmzzci,cm dg/af l0+ sl,8).rm rest and accelerating at a constant angular acceleration of $2.00 \; rad/s^2$ over a 5.00-s interval?

A. $1.00 \; rad$

B. $2.00 \; rad$

C. $12.5 \; rad$

D. $25.0 \; rad$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

54#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A wheel starts at rest, and has anlo / i6fo is1v8bk33z*tswz7y angular acceleration of $4 \; rad/s^2$. Through what angle does it turn in 3.0 s?

A. $36 \; rad$

B. $18 \; rad$

C. $12 \; rad$

D. $9.0 \; rad$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

55#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A Ferris wheel rotating at 20 rad/s decelerates with a const61sfnml 5 a2yuant angular acceleration ofmly6au21sf 5n $-5.0 \; rad/s^2$. How many revolutions does it rotate before coming to rest?

A. 40

B. 20

C. 6.4

D. 3.2

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

56#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A wheel starts from rest and reaches an angular speed of 6+qt2 ydayj )+u.0 rad/s while turning 2+)qda+jy ytu through 2.0 revolutions. What is the average angular acceleration of the wheel?

A. $0.24 \; rad/s^2$

B. $1.4 \; rad/s^2$

C. $3.0 \; rad/s^2$

D. $9.0 \; rad/s^2$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

57#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A wheel of diameter of 68.0 cm slows down uniformly q 0/e;mtvj jcb+5+njv from 8.40 m/s to rest over a distance of 115 m. What is the total number of revolutions the wheel rotates in comin mjv;05+j nt vc/be+qjg to rest?

A. $53.8 \; rev$

B. $26.9 \; rev$

C. $338 \; rev$

D. $169 \; rev$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

58#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A wheel of diameter of 68.0 cm slows down uniformly from 8.40 m/s to resou.xz/(m risue 8)hx1t over a distance ofus/uoh 1 x xzmei).r(8 115 m. What is the angular acceleration?

A. $-1.80 \; rad/s^2$

B. $-0.90 \; rad/s^2$

C. $-5.65 \; rad/s^2$

D. $-11.3 \; rad/s^2$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

59#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A wheel of diameter of 68.0 cm slowsa2 c1ombn9 he4 down uniformly from 8.40 m/s to rest over a distance ae9 21c4h mobnof 115 m. How long does it take for the wheel to come to the stop?

A. $24.7 \; s$

B. $27.4 \; s$

C. $42.7 \; s$

D. $47.2 \; s$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

60#

Fill-in-Blank ( 1.0 marks) Whole-Paper View Save Problem

A centrifuge in a medical laboratory rotates at a dkoqq;q s1u*fxnwf/;pw+ o ;(rotational speed of 3600 rev/min. When switched off, it rotates 50.0 times at1opwqf qf osk/+ux(qw ;*;nd; a constant angular acceleration before coming to rest.
(a) Determine the initial angular speed of the centrifuge.    $rad/s$
(b) Determine the angle (in radians) through which the centrifuge rotates before coming to rest.    $rad$
(c) Calculate the constant angular acceleration of the centrifuge.    $rad/s^2$
(d) Calculate the time necessary for the centrifuge to come to rest.    $s$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

61#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

The bolts on a car wheel require tightening to a torque of 90 Nm. Iwjqrzrbo 5 :d w2bk3*s2ab+ .jf a 30 cm long wrench is used, what is the magnitude of the force required when the force applied b:5sq j rww 3 d.z2a+bob2k*rjat $53^{\circ}$ to the wrench?

A. $190 \; N$

B. $380 \; N$

C. $19 \; N$

D. $38 \; N$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

62#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A wheel with moment of inerticl/2rgo67xybzph* qmdx 52p. a $3.00 kgm^{2}$ has a net torque of 3.50 Nm applied to it. What angular acceleration does it experience?

A. $0.857 \; rad/s^2$

B. $1.17 \; rad/s^2$

C. $3.00 \; rad/s^2$

D. $3.50 \; rad/s^2$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

63#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A triatomic molecule is modeled as follows: mass m is at rx1tk 0yy 1l,,jn.ijz the origin, mass 2m is at x = a, and, mass 3m is at x iyzrkj n jx ,lt.1y10,= 2a. What is the moment of inertia about the origin?

A. $2 ma^2$

B. $3 ma^2$

C. $12 ma^2$

D. $14 ma^2$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

本Practice全部题目来源于https://webassign.org，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

Mark Problem

64#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A solid cylinder of mass 10 kg is pivoted about a frictionless axis thought the unzeqg c(3 ,*hcenter O. A rope wrapped aron(c* gq 3uhze,und the outer radius R1 = 1.0 m, exerts a force F1 = 5.0 N to the right. A second rope wrapped around another section of radius R2 = 0.50 m exerts a force F2 = 6.0 N downward. (See Fig. below) What is the angular acceleration of the cylinder?

A. $1.0 \; rad/s^2$

B. $0.60 \; rad/s^2$

C. $0.40 \; rad/s^2$

D. $0.80 \; rad/s^2$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

65#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A solid cylinder of mass 10 kg is pivoted about a frictionless a;rkvsci1l0 -pxis thought the center O. A rope wrapped around the outer radius R1 = 1.0 m, exerts a force F1 = 5.0 N to the right. A second rope wrapped around another section of radius R2 = 0.50 m exerts a forclrps;kv1ic 0-e F2 = 6.0 N downward. How many radians does the cylinder rotate through in the first 5.0 seconds, if it starts from rest?

A. $13 \; rad$

B. $7.5 \; rad$

C. $5.0 \; rad$

D. $10 \; rad$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

66#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A 4.00-m long rod is hinged at one end. 6dr: *gjqsbg q(a1(n nThe rod is initially held in the horizontal position, and then released as the free end is aldbjnag (1( qgnq: 6r*slowed to fall. What is the angular acceleration as it is released? (The moment of inertia of a rod about one end is ML2/3.)

A. $2.45 \; rad/s^2$

B. $3.68 \; rad/s^2$

C. $4.90 \; rad/s^2$

D. $6.75 \; rad/s^2$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

67#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

Consider a bicycle wheel to be a ring of radius 30 cm and mass 1.5 kg. Neglec j3.k5,29v pb40btcedzz vgszt the mass of the axle and sprocket. If a force of 20 N is a3dvj0z kc,4p. 5ts z29b vebzgpplied tangentially to a sprocket of radius 4.0 cm for 4.1 s, what linear speed does the wheel achieve, assuming it rolls without slipping?

A. 3.0 m/s

B. 5.9 m/s

C. 7.1 m/s

D. 24 m/s

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

68#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A 1.53-kg mass hangs on a rope wrapped around a frictionleyl99hau*h64s)vgjck+ ky r 6sss disk pulley of mass 7.07 kg and radius 66.0 cm. What is the angulavgscyj9hy9k)66 hs* 4ua+lkr r acceleration of the pulley?

A. $4.49 \; rad/s^2$

B. $7.98 \; rad/s^2$

C. $9.87 \; rad/s^2$

D. zero

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

69#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A 1.53-kg mass hangs on a rope.7ylb us0ckb3 wrapped around a frictionless disk pulley of mass 7.07 kg and radius 66.0 cm. What is the acceleration of thbksbul y. c370e mass?

A. $9.26 \; m/s^2$

B. $2.96 \; m/s^2$

C. $6.29 \; m/s^2$

D. zero

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

70#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A rotating flywheel can gk(oikv5s ,9+* jebs kbe used to store energy. If it is required to store $1.00 \times 10^{6} \; J$ of energy when rotating at 400 rad/s, what is the moment of inertial of the wheel in $kgm^{2}$?

A. 6.25

B. 12.5

C. 25.0

D. 50.0

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

71#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A wheel of moment of inertialp dgg9(veb 86 zjdz/ :oykx:1 of $5.00 \; kgm^{2}$ starts from rest and accelerates under a constant torque of 3.00 Nm for 8.00 s. What is the wheel's rotational kinetic energy at the end of 8.00 s?

A. $57.6 \; J$

B. $64.0 \; J$

C. $78.8 \; J$

D. $122 \; J$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

72#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A solid sphere of mass 1.0 kg and radius 0.010 m s .yp9.rxemo ;htarts from rest and rolls without slipping down a 1.0-m high inclined plane. What is the speed of the sphere when it reaches the bottom of the .o; ey.9xhrp minclined plane?

A. 3.7 m/s

B. 4.4 m/s

C. 5.6 m/s

D. 6.3 m/s

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

73#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A solid sphere of mass 1.0 kg and radius 0.010 m rolvs,j+mm kj+1,iepd w 7ls with a speed of 10 m/s. How high up an inclined plj is j ,w+,+dpm1vmk7eane can it climb before coming to rest?

A. $0.071 \; m$

B. $0.71 \; m$

C. $7.1 \; m$

D. $71 \; m$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

本Practice全部题目来源于https://webassign.org，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

Mark Problem

74#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A hoop of radius 0.50 m and a mass of 0.20 kg is released fro0kqp 8k8; emv1 phnh:pm rest and allowed to roll down an inclined plane. How fast is it moving after dropping a verth ;kkpq p:ven h8mp108ical distance of 3.0 m?

A. 2.2 m/s

B. 3.8 m/s

C. 5.4 m/s

D. 7.7 m/s

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

本Practice全部题目来源于https://webassign.org，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力

Mark Problem

75#

Free-Response ( 1.0 marks) Whole-Paper View Save Problem

A solid sphere of mass 1.5 kg ae6rd7h0h3t4.y rp mu hnd radius 15 cm rolls without slipping down a 35e incline that is 7.0 m long. Assume it started from rest. The moment of inertia of a sphere is .7 4tp3hryh6edmhru 0 given by $I = (2/5)MR^2$.
(a) Calculate the linear speed of the sphere when it reaches the bottom of the incline.
(b) Determine the angular speed of the sphere at the bottom of the incline.
(c) Does the linear speed depend on the radius or mass of the sphere? Does the angular speed depend on the radius or mass of the sphere?

该题自我估分: (必填) (满分:1.0分)

绑定到本题的附件链接:
绑定到本题的上传图片: (问答题类型题目图片/附件必须插入上方文本框，否则会被移除题目绑定)

Correct Answer:

Join the discussion for this question

Mark Problem

76#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

An object's angular mxqhtn1ea1 bs2x29q7a0ev,pq omentum changes by $20 \; kgm^{2}/s$ in 4.0 s. What magnitude average torque acted on this object?

A. $2.5 \; N \cdot m$

B. $5.0 \; N \cdot m$

C. $40 \; N \cdot m$

D. $80 \; N \cdot m$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

77#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A proton of mass $1.67 \times 10^{-27} \; kg$ rotates with an angular speed of 2 x 106 rad/s in a circle of radius 0.80 m in a cyclotron. What is the orbital angular momentum of the proton?

A. $1.28 \times 10^{-21} \; kg \cdot m^{2}/s$

B. $1.76 \times 10^{-21} \; kg \cdot m^{2}/s$

C. $2.14 \times 10^{-21} \; kg \cdot m^{2}/s$

D. $3.20 \times 10^{-21} \; kg \cdot m^{2}/s$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

78#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

An ice skater has a moment of ir(/j qvk mx8y1+*a0kis f n.esnertia of $5.0 \; kgm^{2}$ when her arms are outstretched. At this time she is spinning at 3.0 revolutions per second (rps). If she pulls in her arms and decreases her moment of inertia to $2.0 \; kgm^{2}$, how fast will she be spinning?

A. $2.0 \; rps$

B. $3.3 \; rps$

C. $7.5 \; rps$

D. $10 \; rps$

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

Mark Problem

79#

Single-Choice ( 1.0 marks) Whole-Paper View Save Problem

A figure skater rotating at 5.00 rad/s with arms extended has a momejm1 ec;,h6j*b8.z +i5zn an 0mgnuyq qnt of inertia q6b0j eyamj+c5nz1;qz nh8,n.g m *uiof
$2.25 \; kgm^{2}$. If the arms are pulled in so the moment of inertia decreases to $1.80 \; kgm^{2}$, what is the final angular speed?

A. 2.25 rad/s

B. 4.60 rad/s

C. 6.25 rad/s

D. 0.81 rad/s

绑定到本题的附件链接:
绑定到本题的上传图片:

Correct Answer:

Join the discussion for this question

		Remember me	Forgot password?
Password			Register Now

Unused Images

Used Images in Current Log

1	2	3	4	5	6	7	8	9	10
11	12	13	14	15	16	17	18	19	20
21	22	23	24	25	26	27	28	29	30
31	32	33	34	35	36	37	38	39	40
41	42	43	44	45	46	47	48	49	50
51	52	53	54	55	56	57	58	59	60
61	62	63	64	65	66	67	68	69	70
71	72	73	74	75	76	77	78	79

1	2	3	4	5	6	7	8	9	10
11	12	13	14	15	16	17	18	19	20
21	22	23	24	25	26	27	28	29	30
31	32	33	34	35	36	37	38	39	40
41	42	43	44	45	46	47	48	49	50
51	52	53	54	55	56	57	58	59	60
61	62	63	64	65	66	67	68	69	70
71	72	73	74	75	76	77	78	79

1	2	3	4	5	6	7	8	9	10
11	12	13	14	15	16	17	18	19	20
21	22	23	24	25	26	27	28	29	30
31	32	33	34	35	36	37	38	39	40
41	42	43	44	45	46	47	48	49	50
51	52	53	54	55	56	57	58	59	60
61	62	63	64	65	66	67	68	69	70
71	72	73	74	75	76	77	78	79