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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: 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 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 travc)g 1cgr9kh:r5:ugz c75 bbrfels from one point in space to another. Make a comparison between ther 7gg: 5b:zfug1c)95khb crcr 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 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 equal to the z hg1fha1drkjm 345f9yhu3x; 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 advertises that their car can go "yi3gft9n zny y:ny8, .from zero to sixty in 8 s". This is a descripn:z, .nytn yyi 8fg9y3tion 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 +5(mj-xpck8s i x axis experiences an acceleration 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 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 nxn4/8v hz 2hadown as it approaches a traffic light. Make a st4vna /xhnhz 28atement 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 consta.* --9k pfwwbd *ugnsbnt velocity. Make a statement conce.du b* gw*swp-knb9-frning its acceleration.

Correct Answer:    
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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,j.zi )i/q3 g/kv:xa11simqa8m*j7: iqdm fw p does it mean that the acceleration is zero? 3k18ij) qfi waq xsmi/am* q/m1:.dg:p z7vji Support 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 wnkbq 40 5,8olt8m p-nn; ujwdw14s gbconstant? Support your answtg-kb1w85q8wo n 4nwjdm4pb, uns ;l0 er 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 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 a statemes +5mof0)l dxp7 nx*fqnt concerningnf * l0o+) 75sfqmdxpx its motion 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 accelerat c4zf/ 6e4xamjion is decreasing? Support your m4ejx4fza/ c6 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 iniky/k lg ieg4d l2:3r.utial kick, moves up along a smooth hill of ice. Make a statement concerning its acceleratl4i .3u dgr2egk:y /klion.

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 averod-.8j pkpjhn2lf5k - age velocity equal to the average of the object's initia -8j n l.kf5hpp2ojd-kl and final velocity?

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 same rate. Hkhl3 t,(k8aze owever, object A accelerates for twice the time3k ath8l,ek(z as object 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 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 distance tr(,esrd5 s8im gs (.tcgaveled and thetsdc s5g.(ie,srg 8(m 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. 86vai w (cuhx cimz/--kx. l9tHow long will it take to move 12 km upstream in a river flowingxh 6cii-wvtumazx9k. l-c8 / ( 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 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 speed in order to travel 350;;pv.phwus9 ym rc bvvr k+u6-qd5- m/ 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 4u4,oh/t/ cinu2.0 km) in 2 hours and 57 min. What is the average speed/4touuh /,nci of the 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 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 4007w3ib :ewu z:t km?

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 roan2 -3h1a nysxd(ap(kf d and you look to the side for 4.0 s, how far s(-akhdnaxynf1p3 (2do you 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 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 an outdoor track (400 m), in 100 s,be 5, gxkw7nz3 your average velocz w7kg ,5bxne3ity is

Correct Answer:    
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 Pole. It travels 1.0 km south, then 1. cjedzuub0 4d *6e8 5i1 e-zoq4ufhya)2o tz,x0 km east, then 1.0 km north, then 1.0 km west to return to its qe41z 5ooa,e84f2uec 0 th6z*xd-zju ) byudistarting 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 at the North Pole. It travels 1.0 km south, then 1.0tdph1 e-og + 7bnxdc,+ km east, then 1.0 km north, then 1.0 km west to return to its starting point. This trip takes 45 min. What wasx+dn dpoh7b tegc+,1 - 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 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 551p; u7(+v: ggsro gmed mi/h for 110 miles. It then starts to snow and you slow to 35 mi/h. You arrive home after driving 4 hours an;gg+g 1rs(epm :d7o vud 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 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 5* ,wyt yvsr9nun-xm/km at 100 km/h. What is the averag* v5/x,sy9mty nu-nwr e speed of the motorist for 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 apt(h i+4zlm fhpqajlf:(7* g8nd 2.0 h at 100 km/h. What is her average speed for the trip*zm(liha l 8g+ (4j:pq7htff p?

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 miad6; 1qp6) k i(s nyatzs)oak)/h south for 2.00 h and then at 250 mi/h north for 750 mi6pt;s ydqi)a noaa)6k1 )k( zsles. What is the average 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 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 (the person who ru s9of;b+bkz :y.buwlv4; +eo zns 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 final leg of the race, in order that the team A runner 4;zev+oby. fbk ul9; +sozwb: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 bi/ sl*.t*)1dwh2u rwv+ u m4zq*fuadz,7 kpvthe first necessarily have a greater acceleration? u q2*b,f p i+7dhv4**/zzwv t.mua wrud s1lk)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 from 80 km/ad2yc0 d5-fy(ciwfr 4p w)t k6h to 90 km/h with the acceleration of a bicycle that accelerates from rest to 10 km/h in the same ta i)w(cf y2f45- rddk6c0twypime.
Correct Answer:    

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 acceleratw 5s9zbkt3saa) 4q(wjion? 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 object be negative when its accel- eration iskb2rqnel z(s( b7ae66 positive? What about vice versa? If yes, gi 2e66z alkb7(sbner( qve examples in each case.
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 velocity and acce 0lsf,pgz0ix sc01x9g 37ujqyleration are negative.
Correct Answer:    
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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*jo2 ,pg8j f tazt4l3fwkrh3: decreases? If so, give an example. If noft *gorz,4 8w2 k:lj3h3 fajptt, explain.
Correct Answer:    
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
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 traveep77p-zs)xst ywwx7kxp7 :v0ling with a speed of 60 km/h and has an acceleration of 40 km/h/min. Car B has 7v7)s xkpe7xwtzw p7-s 0y:pxa 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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