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PRACTICE：Science 10 April 17 in-class Practice
本Practice来源于https://webassign.org，是在线Practice的打印版，您也可以访问本平台网站(https://webassign.org/)直接在线完成(注册并登录账号后在首页左侧输入试卷号 705 即可在线作答)，，作答电子化后可随时回放，查看每题答案与详细解析，搜藏保存任意题目；教师使用本平台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。本试卷的直接作答链接 https://webassign.org/test705.html
 Author: cwphysics    Total Marks: 34 mks  Marks Awarded: _____________

User Name: No Login  Start Time: 04月17日 08:15 End Time: 04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 73:80  Correct Percent: 48%  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;vvelv ,;e 5ubp5s -qt. Make a comparison between the displacement and the dista5;- pveb;tvle5,q svunce traveled.

Correct Answer:    
Mark Problem
2#
 
Single-Choice ( 1.0 marks) (No. in Group 2/27) Whole-Paper View eid: 783  R:W 114:51  Correct Percent: 69%  Difficulty: *****  
试卷已过期，处于只读浏览模式，无法保存作答
  When is the average velocity of an object equ9vr5l+siv fdsq :89ar al 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 80:79  Correct Percent: 50%  Difficulty: *****  
试卷已过期，处于只读浏览模式，无法保存作答
  A new car manufacturer adverti9f:(wiexza)ktg 6)dvy q: f ;hses that their car can go "from zero to sixty in 8 s". This is a d (z vy6waxhkie9fqd g)ft: :;)escription of

Correct Answer:    
Mark Problem
4#
 
Single-Choice ( 1.0 marks) (No. in Group 4/27) Whole-Paper View eid: 785  R:W 94:58  Correct Percent: 62%  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 acceleratk8(3 :(n kxxo an so(h0r-f-biftjhb-ion of $2.0 \; m/s^2$. This means the object is

Correct Answer:    
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Mark Problem
5#
 
Single-Choice ( 1.0 marks) (No. in Group 5/27) Whole-Paper View eid: 787  R:W 57:83  Correct Percent: 41%  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 direction) begins to slow down:t6brde7hh0 fhk,)a66at d lh as it approaches a traf htr,60 :a)eal 6h k7dfhd6hbtfic light. Make a statement concerning its acceleration.

Correct Answer:    
Mark Problem
6#
 
Single-Choice ( 1.0 marks) (No. in Group 6/27) Whole-Paper View eid: 788  R:W 106:51  Correct Percent: 68%  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 nl;yh) v6+jbo a statement concerni bhv6+); nyojlng its acceleration.

Correct Answer:    
Mark Problem
7#
 
Single-Choice ( 1.0 marks) (No. in Group 7/27) Whole-Paper View eid: 789  R:W 72:88  Correct Percent: 45%  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, does it mean that the acceleratioe3 gkas-k+ e fmi90+uc 1oat3zf9z4oon is zero? Suppoti93ge0 1z-+ o cuazkfamo49ke3+so f rt your answer with an example.

Correct Answer:    
Mark Problem
8#
 
Single-Choice ( 1.0 marks) (No. in Group 8/27) Whole-Paper View eid: 790  R:W 74:112  Correct Percent: 40%  Difficulty: *****  
试卷已过期，处于只读浏览模式，无法保存作答
  Can an object's velocity change direction when its acceleration is constanti8e7w zus0o a0? Support your answer eo i 70z08awuswith an example.

Correct Answer:    
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Mark Problem
9#
 
Single-Choice ( 1.0 marks) (No. in Group 9/27) Whole-Paper View eid: 791  R:W 91:60  Correct Percent: 60%  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. Make kr*0*ac tlr)m1.u fzu a statement concerning its motionc t u1rzrkuma0 *).fl* with respect to time.

Correct Answer:    
Mark Problem
10#
 
Single-Choice ( 1.0 marks) (No. in Group 10/27) Whole-Paper View eid: 792  R:W 74:95  Correct Percent: 44%  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 acceleration is decreasing? Sxo /-+(mz 08sbh d7jx /lvoitbupport xi os b 7+vtd zl-mjo8bx/h0(/your answer with an example.

Correct Answer:    
Mark Problem
11#
 
Single-Choice ( 1.0 marks) (No. in Group 11/27) Whole-Paper View eid: 793  R:W 45:92  Correct Percent: 33%  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 of ice. Makr 0ke46,n3 ye) l+-08tbc sschq ehhnge a statement concerning its accelee64s0c8h b lrec-n3tyqhgk0 ns+e h ),ration.

Correct Answer:    
Mark Problem
12#
 
Single-Choice ( 1.0 marks) (No. in Group 12/27) Whole-Paper View eid: 794  R:W 92:72  Correct Percent: 56%  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 object's 2ylabo1 e : oqp d14b841oeltiinitial and final velo1etb2y e4i1obap loo: l 84q1dcity?

Correct Answer:    
Mark Problem
13#
 
Single-Choice ( 1.0 marks) (No. in Group 13/27) Whole-Paper View eid: 795  R:W 124:41  Correct Percent: 75%  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 at rest. They both accelerate at the sam3:m f+adj z(mke .tw*oe rate. However, obj:mwfd *m3t+.e(jzo akect A accelerates for twice the time as object B. What is the final speed of object A compared to that of object B?

Correct Answer:    
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Mark Problem
14#
 
Single-Choice ( 1.0 marks) (No. in Group 14/27) Whole-Paper View eid: 822  R:W 119:29  Correct Percent: 80%  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 11.0 m south. Find both the distanc 8:c0kkzer,- qfm( oqcsd6cs0 e travelercof(zdcmq0,06 es -s kc8: qkd and 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 78:57  Correct Percent: 58%  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 30 km/h in still water. How lobpeh(fvx 9g(;ng will it take to move 12 km upstream inb9h ;vgf((exp a river flowing 6.0 km/h?

Correct Answer:    
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Mark Problem
16#
 
Single-Choice ( 1.0 marks) (No. in Group 16/27) Whole-Paper View eid: 825  R:W 80:51  Correct Percent: 61%  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 speedrcy,. 8jyq* i.x*fvma--l tt z 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 101:60  Correct Percent: 63%  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 42.0 km) in 2 hourgs6p)7hi ggy gx+b8n3 s and 57 min. What is the average speed of the runner i3ygxgh)6pb 87isgn +g n m/s?

Correct Answer:    
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Mark Problem
18#
 
Single-Choice ( 1.0 marks) (No. in Group 18/27) Whole-Paper View eid: 827  R:W 83:31  Correct Percent: 73%  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 does it take for it to travel 400 km .wn 7au 75wlg7z)idb5 rf;pmg?

Correct Answer:    
Mark Problem
19#
 
Single-Choice ( 1.0 marks) (No. in Group 19/27) Whole-Paper View eid: 829  R:W 92:68  Correct Percent: 58%  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 straight road and you ly 2q;+plnzmp8 ook to the side for 4.0 s, how far do you travel duriz+;2yp8 mpn lqng this inattentive period?

Correct Answer:    
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Mark Problem
20#
 
Single-Choice ( 1.0 marks) (No. in Group 20/27) Whole-Paper View eid: 830  R:W 53:135  Correct Percent: 28%  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 atgdlrlp1yq(vtlk8s31 *sbcd 9tm1) . : m(peu n outdoor track (400 m), in 100 s, your average v3tu .mcbqppklyge( rls1d d1(ts8*m1) lt 9:velocity is

Correct Answer:    
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Mark Problem
21#
 
Single-Choice ( 1.0 marks) (No. in Group 21/27) Whole-Paper View eid: 831  R:W 64:88  Correct Percent: 42%  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 P ) )tp1-ekdggbd64av xole. It travels 1.0 km south, then 1.0 km east, then 1.0 km north, then 1.0 pd 641)xgavebdkg )t- 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 67:93  Correct Percent: 42%  Difficulty: *****  
试卷已过期，处于只读浏览模式，无法保存作答
  A polar bear starts aaw,cy7i 26ufv t the North Pole. It travels 1.0 km south, then 1.0 km east, then 1.0 km north, then 1.02aiuywfv 6, 7c km west to return to its starting point. This trip takes 45 min. What was the bear's average velocity?

Correct Answer:    
Mark Problem
23#
 
Single-Choice ( 1.0 marks) (No. in Group 23/27) Whole-Paper View eid: 833  R:W 97:69  Correct Percent: 58%  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 weekend from school at 55 mi/h fi acw 4z16,+bd+mofi 0akrr;h or 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 schoolm4ric w+bkhda0 rz f;ia o61+,?

Correct Answer:    
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Mark Problem
24#
 
Single-Choice ( 1.0 marks) (No. in Group 24/27) Whole-Paper View eid: 834  R:W 74:74  Correct Percent: 50%  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 sr7gv5 rf3-mris the average speed of the motorist fgvm r-5r3rs7f or this trip?

Correct Answer:    
Mark Problem
25#
 
Single-Choice ( 1.0 marks) (No. in Group 25/27) Whole-Paper View eid: 835  R:W 104:47  Correct Percent: 69%  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.lxng( o92 8 ov:k6kbcqccm71t What is her average speed for qv: 8ko6c97mgx21o ct( blck nthe trip?

Correct Answer:    
Mark Problem
26#
 
Single-Choice ( 1.0 marks) (No. in Group 26/27) Whole-Paper View eid: 836  R:W 91:64  Correct Percent: 59%  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 for 2.00 r-i qi3hrgac1k:ipksp h6s5q) 1y( a4h and then at 250 mi/h north for 750 miles. What is the average speedhqsp5p-a4a(r61shik c 3)q k :i1r giy 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 77:63  Correct Percent: 55%  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 (thzqob59(31,g qjnmmyevh l-a8e person who runs the last 100 m) for team A can run 100 m 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 fi,m35ngb(1z9 yhj q 8oqav-emlnal 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 secsor j7-m6l1tr5 hqu o9z(m5 +azz2yieond object, does the first necessarily have a greater accamemz 79zz-h t51( q2o isy6lur+oj5releration? Explain, using examples.
Correct Answer:    
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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 from 80 kmi b-m8dmrp0 n-/h to 90 km/h-mr0 n8 mdibp- with the acceleration of a bicycle that accelerates from rest to 10 km/h in the same time.
Correct Answer:    
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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 northward velocity and a southward acceleratvlq titrr 02g-y1b* ;z; 1dcrzr 7aco0 .+ufbxion? Explain.
Correct Answer:    
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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 object be negative when its accel- eratim;g: lyfy-y7l sf atz-,mce. my 07r4ton is positive? What about vice versa? If yes, give examples in each c7f,: cl4z .lmstr0ft eyy-7 mg-;a myyase.
Correct Answer:    
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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 v bavv/b n6k *z;z-(a (3hxl.skkxz4xl elocity and acceleration are negative.
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,/lutzai /q4mh.3 * ygl give an example. ytgqlih*/3 uam lz.4 /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 san d8mw,*0w pa vb1r p;xp/p.vxb.cm.peed 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 acceleration of 6vwppp1nm/ *,rd8;b.v bca .x0a px.mw0 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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