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PRACTICE：Science 10 April 17 in-class Practice
本Practice试卷来源于https://webassign.org， 为试卷打印版，您也可以在网站平台(https://autoconfig.webassign.org/)直接 访问本试卷的在线电子版并查看正确答案与解析，搜藏保存任意题目到收藏集。 访问方法: 平台首页左上角"通过试卷号快速访问"输入试卷号 705，并点击直达试卷；或浏览器地址栏内直接输入本试卷链接 https://autoconfig.webassign.org/test705.html  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。
 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 ogf/mka 6mq,:heycd q-f/ v ;4yne point in space to another. Make a comparison between the displacement and the distan eymy;f//,h-mvd 4qacq: g6kf ce traveled.

Correct Answer:    
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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 velocity of an object equal to the instantaneous velocinh 0e7ad,( lput .5fzv:dku5 vty?

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
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 manufactureru 8f28xtpxi-.u5;njwwewo( diyt3 b 9 advertises that their car can go "from zero to sixty in 8 s". This is a descriudtop ;( y98jnx b8ewf-wu.xiw35 t2iption 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: *****  
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  An object moving in the +x axis experiences an acgf t6jkq 2w c1y4u4*nuceleration 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 direction) begins to *iime* lc+e6- h.hdsn gin,3islow down as it approaches a traffic light. Make a statementehnl n h,gdi-m6 3+.ceis**i i 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 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 vel3w 0bi)vwzwr(rb3 djh 81z7* axr2is eocity. Make a statement concervzz*2(e3hwr18bis7db ww aj3i xr0)rning its acceleration.

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, does it mean that the accy-w q*pv.(vw/siaru;wd8i y 6 eleration is zero? Support your answer with an examp*pwi 6w yy/vis q.wur-va d8(;le.

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: *****  
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  Can an object's velocity change directionik 60j-cn gx4j when its acceleration is constant? Suppor g6j0x-nj4kic t 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. Make a statemeunb8.6:bpeva25kk wz nt concerning its motion65ekwvup ka2.z:8bbn 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 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 itg-ix9/ ;uxr-;vq rto0ld* tyu 0l7ovls acceleration is decreasing? Support your answer with an exaor y07vlt v ldl ;0*9qgu-rtu/ xxoi-;mple.

Correct Answer:    
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: *****  
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  Suppose a can, after an initial kick, moves up along a smooth hillc)go 71 1tkd*.bn xpll of ice. Make 11p)tcg. 7l *klodbnxa statement concerning its acceleration.

Correct Answer:    
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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: *****  
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  Under what condition is average velocity equal to th/2 .dp4u9g zjoxy2g n/n.t0qe )lretne average of the object's initial andn o.d zt2r/nug exjlye9nq.)/g420t p final 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: *****  
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  Objects A and B both start at rest. y qz+.j tkg30cThey both accelerate at the same rate. However, object A accelerates for twice the time as object B. What is the final speed of obj3 +kygt.jczq0 ect 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 15.00b q2mb:po6 jc m north and then 11.0 m south. Find both the distance traveled and the magnitude of the displacementq2:mb0bjo c p6 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: *****  
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  A boat can move at 30 km/h in still water.0e7 n nnf4 h-lfp,)zzi How long will it take to move 12 km upstream in a river flowing 6.0 km/hi hn,f4f )e7-z n0lpzn?

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 speed in hl 1.lpcmpr3 8order 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: *****  
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  A runner ran the marathon (approximatel*e,jwa-n .jrb2fx) c dy 42.0 km) in 2 hours and 57 min. What is the average speed of thean .ebjf2j c)-*rw,dx runner in m/s?

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: *****  
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  A car travels 90 km/h. How long does it ti eidj3q*oepz -)/vpl7+ 7qvhbv*2 gtake 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 k ucxjvl5 3aur*0ro- ndz0*r m0m/h along a straight road and you look to the side for 4.0 s, how far do yurc0*- 5r00uj *arzn mdov3lxou travel 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 loor;rs0z/z qdatih0 a9 7p around an outdoor track (400 m), in 100 s, your average velocit dz/ 0r0st7h;z9ariq ay is

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: *****  
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  A polar bear starts at the North Pole. It travels 1.0 km south, then 1.0 km / * 2uxt(0cu9im*z0ok iadf1 ip+r puteast, then 1.0 km north, then a *z0t1r*+ck i2i (pxumuuod/0pi9t f1.0 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 Pol-,4og tzgh1s ce. It travels 1.0 km south, then 1.0 km east, then 1.0 km north, then 1.0 km west 1g4sg,o zt hc-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 123:73  Correct Percent: 63%  Difficulty: *****  
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  You are driving home on a weekend from school at zisd6n ,tch54ti8 23vd1n ihw55 mi/h for 110 miles. It then starts to 1wt tnhn6iishi8d4z,23vc d 5 snow and you slow to 35 mi/h. You arrive home after driving 4 hours and 15 minutes. How far is your hometown from school?

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: *****  
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  A motorist travels 16ej 3,tttct9 *l)7moml0 km at 80 km/h and 160 km at 100 km/h. What is the average speed of the motorist for this* o3cle,97 lt)jmm ttt trip?

Correct Answer:    
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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: *****  
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  A motorist travels for 3.0 h athg/dj 0r)h/bg 80 km/h and 2.0 h at 100 km/h. What is her avera/h/rh jdg)0bgge speed 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 300dwf -b3,rokx(lud q6(a(8 gvvo6 lis6 mi/h south for 2.00 h and then at 250 mi/h north for 750 mile l g,v63o6-xk(d8 dvwb uf6li(aqosr (s. What is the average speed for the trip?

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
27#
 
Single-Choice ( 1.0 marks) (No. in Group 27/27) Whole-Paper View eid: 837  R:W 105:66  Correct Percent: 61%  Difficulty: *****  
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  In a 400-m relay race the anchorman (the person whb1rjzb-f)u 0yov y98dt xxk-+ 7gb8k co runs the last 100 m) for team A can run 100 m in 9.8 s. His rival, the anccd x8ykfobrv)y 1+jb0 u-9 z87xtkg -bhorman 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 thrygo9 dfv4m: 4e first necessarily have a greater acceleration? Explain, using examplvd oyg44 rf:m9es.
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
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 accelerati*7tec9d9w nt zi+phh ,on of a motorcycle that accelerates from 80 km/h to 90 km/h w+wt7hz,e 9tc p*h d9niith the acceleration of a bicycle that accelerates from rest to 10 km/h in 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 northward vel-pqjee0pocpk 8 6o*4gocity and a southward acceleration? Explain.
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
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 acc wvl;gmy ri 1+mf6ym./el- eration is positive? What about vice versa? If yes, v1m.w /mrm yi6l+g ;yfgive examples in each case.
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
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 5x,asqcg -y+ygfb +t /velocity and acceleration are negative.
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
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 detmveu fd n5ka78 3*9pncreases? If so, give an exampek57mpd8 nfu nv*ta 39le. 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 sp,xlbu r)g9qbf 2 ;rv( 35paofoeed of 60 km/h and has an accgf b)u plo3ar,or(v2; x5qb9feleration of 40 km/h/min. Car B has a speed of 40 km/h and has an acceleration 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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