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PRACTICE：Science 10 April 17 in-class Practice
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 Author: cwphysics    Total: 34 Marks  Marks Earned: _____________

User Name: No Login  Start Time: 25年04月17日 08:15 End Time: 当月25日 09:35  Switch to: Whole-Paper Mode

Mark Problem
1#
 
Single-Choice ( 1.0 marks) (No. in Group 1/27) Whole-Paper View eid: 782  R:W 103:82  Correct Percent: 56%  Difficulty: *****  
试卷已过期，处于只读浏览模式，无法保存作答
第 1 题组 (共 27 题 27 分)
  Suppose that an object travels from one point in space to another. Make a cogjw* an43k -nfw8xgw:mparisonxjw8*n 3g a-g 4fwnk:w between the displacement and the distance traveled.

Correct Answer:    
Mark Problem
2#
 
Single-Choice ( 1.0 marks) (No. in Group 2/27) Whole-Paper View eid: 783  R:W 144:54  Correct Percent: 73%  Difficulty: *****  
试卷已过期，处于只读浏览模式，无法保存作答
  When is the average vel.1 3kwe0iopdp ocity of an object equal to the instantaneous velocity?

Correct Answer:    
Mark Problem
3#
 
Single-Choice ( 1.0 marks) (No. in Group 3/27) Whole-Paper View eid: 784  R:W 107:87  Correct Percent: 55%  Difficulty: *****  
试卷已过期，处于只读浏览模式，无法保存作答
  A new car manufacturer advertises that their car can go "froy:acb +.hhl: w 5 znvn13hy7enm zero to sixty in 8 s". This is a desc: nhy y+lvhh1 zn573abn.:ewcription of

Correct Answer:    
Mark Problem
4#
 
Single-Choice ( 1.0 marks) (No. in Group 4/27) Whole-Paper View eid: 785  R:W 123:61  Correct Percent: 67%  Difficulty: *****  
试卷已过期，处于只读浏览模式，无法保存作答
  An object moving in the +x axis experiences an ach epqhurp62l8tf:( x+ cub4b9 celeration of $2.0 \; m/s^2$. This means the object is

Correct Answer:    
Mark Problem
5#
 
Single-Choice ( 1.0 marks) (No. in Group 5/27) Whole-Paper View eid: 787  R:W 86:87  Correct Percent: 50%  Difficulty: *****  
试卷已过期，处于只读浏览模式，无法保存作答
  Suppose that a car traveling to the West (-x d,s pngrvrl)y//rjbi+ruo. wjm80g(5g lq66direction) begins to slow down as it 6giu bvq/5g+l( wsorpjj,/n6.r8m g)ry l0rd approaches a traffic light. Make a statement concerning its acceleration.

Correct Answer:    
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Mark Problem
6#
 
Single-Choice ( 1.0 marks) (No. in Group 6/27) Whole-Paper View eid: 788  R:W 136:53  Correct Percent: 72%  Difficulty: *****  
试卷已过期，处于只读浏览模式，无法保存作答
  Suppose that an object is moving with a constant velocity. Make a statement cogx awtm8:x 2q/(.jlua ncerning its accelemlxg q(j.twax/a:2 u 8ration.

Correct Answer:    
Mark Problem
7#
 
Single-Choice ( 1.0 marks) (No. in Group 7/27) Whole-Paper View eid: 789  R:W 95:101  Correct Percent: 48%  Difficulty: *****  
试卷已过期，处于只读浏览模式，无法保存作答
  If the velocity of an object is zero, wa1txx )hckxq(r )zhfvm* 8:6fm4 ,u ndoes it mean that the acceleration is zero? Support your answer with an exa: mf x,uvfrh6 *zcx)q)w1t8ak x mhn4(mple.

Correct Answer:    
Mark Problem
8#
 
Single-Choice ( 1.0 marks) (No. in Group 8/27) Whole-Paper View eid: 790  R:W 102:118  Correct Percent: 46%  Difficulty: *****  
试卷已过期，处于只读浏览模式，无法保存作答
  Can an object's velocg *1nz0d v/nh n d35lp+ hznw0bjttps4.1h)diity change direction when its acceleration is constant? Suppor5d.snj3n+4pdl1z0 wng v i t1pd0ht*hbzn /)ht your answer with an example.

Correct Answer:    
Mark Problem
9#
 
Single-Choice ( 1.0 marks) (No. in Group 9/27) Whole-Paper View eid: 791  R:W 118:68  Correct Percent: 63%  Difficulty: *****  
试卷已过期，处于只读浏览模式，无法保存作答
  Suppose that an object is moving with constant acceleration.9w0 6syx1-zt y,n6bdr mp1xtz3s:vem Make a statement concerning itsv 1yyps-:3mez90nm ,xs rt1btd 66 wxz motion with respect to time.

Correct Answer:    
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教师可以抽题组卷或一键复制本试卷，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) (No. in Group 10/27) Whole-Paper View eid: 792  R:W 100:102  Correct Percent: 50%  Difficulty: *****  
试卷已过期，处于只读浏览模式，无法保存作答
  Can an object have increasing speed while its accelera9edi nl*1,;7 z6w ju;yxtalijtion is decreasing? Support your answer wid u lx;79 ,jza jeln6wi*ty;i1th an example.

Correct Answer:    
本Practice题目来源于https://webassign.org，学生可刷题练习，扫右侧二维码或加微信xxxxxxxxxx，获取更多资料
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Mark Problem
11#
 
Single-Choice ( 1.0 marks) (No. in Group 11/27) Whole-Paper View eid: 793  R:W 68:106  Correct Percent: 39%  Difficulty: *****  
试卷已过期，处于只读浏览模式，无法保存作答
  Suppose a can, after an initial kick, moves up along a smooth hill fu8* )x9qc(zdji cmj+of ice. Make a sta uiz8 cq)jdf cm9xj+(*tement concerning its acceleration.

Correct Answer:    
Mark Problem
12#
 
Single-Choice ( 1.0 marks) (No. in Group 12/27) Whole-Paper View eid: 794  R:W 116:83  Correct Percent: 58%  Difficulty: *****  
试卷已过期，处于只读浏览模式，无法保存作答
  Under what condition is average velocity equal to the average of the x1+o;p s5rpviu ;4 qrmobject's initial and final 4r; ir5q1 us +ovmppx;velocity?

Correct Answer:    
Mark Problem
13#
 
Single-Choice ( 1.0 marks) (No. in Group 13/27) Whole-Paper View eid: 795  R:W 152:43  Correct Percent: 78%  Difficulty: *****  
试卷已过期，处于只读浏览模式，无法保存作答
  Objects A and B both start cw6h 9r6 gmgp/at rest. They both accelerate at the same rate. However, object A accelerates for twice the time as objegg c/96wrp6hm ct B. What is the final speed of object A compared to that of object B?

Correct Answer:    
Mark Problem
14#
 
Single-Choice ( 1.0 marks) (No. in Group 14/27) Whole-Paper View eid: 822  R:W 148:29  Correct Percent: 84%  Difficulty: *****  
试卷已过期，处于只读浏览模式，无法保存作答
  An object moves 15.0 m north and then 1yfdf9xp3 j43zlnq03 -yu:vmo1.0 m south. Find both the distance traveled yv33 zxdj qpfm loyf4u9 0-3:nand the magnitude of the displacement vector.

Correct Answer:    
Mark Problem
15#
 
Single-Choice ( 1.0 marks) (No. in Group 15/27) Whole-Paper View eid: 823  R:W 106:59  Correct Percent: 64%  Difficulty: *****  
试卷已过期，处于只读浏览模式，无法保存作答
  A boat can move at 3 yj:5zgvj8j7tt5sxf7 0 km/h in still water. How long will it take to move 12 km upstream in a river flowizy7t g 7:fx5jj5vj8tsng 6.0 km/h?

Correct Answer:    
Mark Problem
16#
 
Single-Choice ( 1.0 marks) (No. in Group 16/27) Whole-Paper View eid: 825  R:W 108:52  Correct Percent: 68%  Difficulty: *****  
试卷已过期，处于只读浏览模式，无法保存作答
  What must be your average speex56 a u6fqh4x7mpgs o5,wr k-xi: bv/rd in order to travel 350 km in 5.15 h?

Correct Answer:    
Mark Problem
17#
 
Single-Choice ( 1.0 marks) (No. in Group 17/27) Whole-Paper View eid: 826  R:W 130:60  Correct Percent: 68%  Difficulty: *****  
试卷已过期，处于只读浏览模式，无法保存作答
  A runner ran the marathon (approximately 42., ga5 h a6x(/gmv*igul0 km) in 2 hours and 57 min. What is the average speed of the runner in m/s6*,a gua/ g(5mvxiglh?

Correct Answer:    
Mark Problem
18#
 
Single-Choice ( 1.0 marks) (No. in Group 18/27) Whole-Paper View eid: 827  R:W 111:31  Correct Percent: 78%  Difficulty: *****  
试卷已过期，处于只读浏览模式，无法保存作答
  A car travels 90 km/h. How long doeuwbj2-rru5i-6 o6 4mmoc 4oz os it take for it to travel 400 km?

Correct Answer:    
Mark Problem
19#
 
Single-Choice ( 1.0 marks) (No. in Group 19/27) Whole-Paper View eid: 829  R:W 121:70  Correct Percent: 63%  Difficulty: *****  
试卷已过期，处于只读浏览模式，无法保存作答
  If you are driving 72 km/h along a straig1x.og:.qj ck3ze9iuaebc 8fk drm9rj3-. ew6ht road and you look to the side for 4.0 s, how far do you trave6 wqk. 8ccrxkd ugr :fo. 3i 9e9maz3jj1e-b.el during this inattentive period?

Correct Answer:    
Mark Problem
20#
 
Single-Choice ( 1.0 marks) (No. in Group 20/27) Whole-Paper View eid: 830  R:W 78:148  Correct Percent: 35%  Difficulty: *****  
试卷已过期，处于只读浏览模式，无法保存作答
  If you run a complete loop around an outdoor track (400 m), in;kaoo z s+a-z. 100 s, your average velocity iszaa+kz-o. ; so

Correct Answer:    
Mark Problem
21#
 
Single-Choice ( 1.0 marks) (No. in Group 21/27) Whole-Paper View eid: 831  R:W 91:93  Correct Percent: 49%  Difficulty: *****  
试卷已过期，处于只读浏览模式，无法保存作答
  A polar bear starts at the North Pole. It travels eb*/r,h-1 eezgvau*,hn; df)iy8 cyp 1.0 km south, then 1.0 km east, then 1.0 k u,dh/,)nip e8cer*y-*agh;vzb e1fy m north, then 1.0 km west to return to its starting point. This trip takes 45 min. What was the bear's average speed?

Correct Answer:    
Mark Problem
22#
 
Single-Choice ( 1.0 marks) (No. in Group 22/27) Whole-Paper View eid: 832  R:W 94:100  Correct Percent: 48%  Difficulty: *****  
试卷已过期，处于只读浏览模式，无法保存作答
  A polar bear starts at the North Pole. It travels 1.0 km south, then 1.0 8kw )mj o3zx4 jnll,2skm east, then 1.0 km north, then 1.0 km west to return to its startim 2j l)lkws43n,8xoj zng point. This trip takes 45 min. What was the bear's average velocity?

Correct Answer:    
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Mark Problem
23#
 
Single-Choice ( 1.0 marks) (No. in Group 23/27) Whole-Paper View eid: 833  R:W 123:73  Correct Percent: 63%  Difficulty: *****  
试卷已过期，处于只读浏览模式，无法保存作答
  You are driving home on a week hmh,:r pur(,2, mlr,p0gzhw nend from school at 55 mi/h for 110 miles. It then starts to snow and you slow to 35 mi/h. You arrive home after driving 4 hours and 15 minutes. How far is your hometown from schoolr,p mgnhr ,zph, l:uh wrm20(,?

Correct Answer:    
Mark Problem
24#
 
Single-Choice ( 1.0 marks) (No. in Group 24/27) Whole-Paper View eid: 834  R:W 102:77  Correct Percent: 57%  Difficulty: *****  
试卷已过期，处于只读浏览模式，无法保存作答
  A motorist travels 160 km at 80 km/h and 160 km at 100 km/h. What is the averag;e 6 vck/j/coivqyfty7- f:/be speed of th/k -;e 6by/qivccvy:j/ f7 tofe motorist for this trip?

Correct Answer:    
本Practice题目来源于https://webassign.org，学生可刷题练习，扫右侧二维码或加微信xxxxxxxxxx，获取更多资料
教师可以抽题组卷或一键复制本试卷，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) (No. in Group 25/27) Whole-Paper View eid: 835  R:W 130:48  Correct Percent: 73%  Difficulty: *****  
试卷已过期，处于只读浏览模式，无法保存作答
  A motorist travels for 3.0 h at 80 km/h and 2.0 h at 100 km/h. What is 1od0j z9ba4ego. m fb,:lms0bher average s gba9mzbo ofl.0sd4:m,b01 j epeed for the trip?

Correct Answer:    
Mark Problem
26#
 
Single-Choice ( 1.0 marks) (No. in Group 26/27) Whole-Paper View eid: 836  R:W 119:65  Correct Percent: 65%  Difficulty: *****  
试卷已过期，处于只读浏览模式，无法保存作答
  An airplane travels at 300 mi/h south ford*v7n5lyxi nao .3i4 eo-,ozr 2.00 h and then at 250 mi/h north for 750 miles. What is the averr-z7o ne.n dao3yli,5 ox*4ivage speed for the trip?

Correct Answer:    
Mark Problem
27#
 
Single-Choice ( 1.0 marks) (No. in Group 27/27) Whole-Paper View eid: 837  R:W 105:66  Correct Percent: 61%  Difficulty: *****  
试卷已过期，处于只读浏览模式，无法保存作答
  In a 400-m relay race the anchorman (the per3q1q f0a nvmj5son who runs the last 100 m) for team A can run 100 mq 1nm0q3 ajfv5 in 9.8 s. His rival, the anchorman for team B, can cover 100 m in 10.1 s. What is the largest lead the team B runner can have when the team A runner starts the final leg of the race, in order that the team A runner not lose the race?

Correct Answer:    
Mark Problem
28#
 
Free-Response ( 1.0 marks) (No. in Group 1/7) Whole-Paper View eid: 10136  
试卷已过期，处于只读浏览模式，无法保存作答
第 2 题组 (共 7 题 7 分)
If one object has a greater speed than a second object, does the firstq f97b .kon(jcqi b33r necessarily have a greater accelejnf9c 3 3okiqr b(q7.bration? Explain, using examples.
Correct Answer:    

Mark Problem
29#
 
Free-Response ( 1.0 marks) (No. in Group 2/7) Whole-Paper View eid: 10137  
试卷已过期，处于只读浏览模式，无法保存作答
Compare the acceleration of a motorcycle that accelerates tqf 1)x pdx1xl- mvomvx-n*+9v9bq3 yfrom 80 km/h to 90 km/h with the acceleration of a bicycle that accelerates from rest to 10 km/h iv 1v-xmxl91)*pb t vfd +x-m9nxo3 qqyn the same time.
Correct Answer:    
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教师可以抽题组卷或一键复制本试卷，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
30#
 
Free-Response ( 1.0 marks) (No. in Group 3/7) Whole-Paper View eid: 10138  
试卷已过期，处于只读浏览模式，无法保存作答
Can an object have a northware tf mc(4gz;z7d velocity and a southward acceleration? Explain.
Correct Answer:    

Mark Problem
31#
 
Free-Response ( 1.0 marks) (No. in Group 4/7) Whole-Paper View eid: 10139  
试卷已过期，处于只读浏览模式，无法保存作答
Can the velocity of an objectj o zcron3/*, udlav9( be negative when its accel- eration is positive? What about vi3 uz,o9/jvodcarl(n*ce versa? If yes, give examples in each case.
Correct Answer:    

Mark Problem
32#
 
Free-Response ( 1.0 marks) (No. in Group 5/7) Whole-Paper View eid: 10140  
试卷已过期，处于只读浏览模式，无法保存作答
Give an example where both the velocity and acceleration are negativag0/jf 9lk+ njtgey.v l-7f *ee.
Correct Answer:    

Mark Problem
33#
 
Free-Response ( 1.0 marks) (No. in Group 6/7) Whole-Paper View eid: 10141  
试卷已过期，处于只读浏览模式，无法保存作答
Can an object be increasing in speed as its acceleration decreases? If so, g8ari/ 6a+tks.1iul opg + k0nzive an exa8ruo k g/n pt1z6.+li0+a iaksmple. If not, explain.
Correct Answer:    

Mark Problem
34#
 
Free-Response ( 1.0 marks) (No. in Group 7/7) Whole-Paper View eid: 10142  
试卷已过期，处于只读浏览模式，无法保存作答
Two cars emerge side by side from a tunnel. Car A is traveling with a spkkg 7/8 psz.,unijbo-s8p 8be 9 9phbxeed of 60 km/h and has an acceleration of 40 km/h/min. Car B has a speed of 40 km/h and has an acceleg9 sbpo/upzx7i.kepsj 8-9bk88, bh nration of 60 km/h/min. Which car is passing the other as they come out of the tunnel? Explain your reasoning.
Correct Answer:    

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