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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 121:83  Correct Percent: 59%  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 2g :f(tat2zmpcz.co7 to another. Make a comparison between the displaceme:2 ta(z2c7 cgzmptf.ont 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 161:55  Correct Percent: 75%  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 veloci.j xz3 vdqb x/spug3.5ty?

Correct Answer:    
Mark Problem
3#
 
Single-Choice ( 1.0 marks) (No. in Group 3/27) Whole-Paper View eid: 784  R:W 123:91  Correct Percent: 57%  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 ca+)+o/a knkwy.ey34nmr-m ml an go "from zero to sixty in 8 s". This is a descrke4+kao + lnyw yr)/.-mna3m miption of

Correct Answer:    
Mark Problem
4#
 
Single-Choice ( 1.0 marks) (No. in Group 4/27) Whole-Paper View eid: 785  R:W 141:63  Correct Percent: 69%  Difficulty: *****  
试卷已过期，处于只读浏览模式，无法保存作答
  An object moving in thei ljuxi t/t.0: +x axis experiences an acceleration 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 104:87  Correct Percent: 54%  Difficulty: *****  
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  Suppose that a car traveling to r-zktw 7 .qra/the West (-x direction) begins to slow down as it approaches a traffic /t7.a qrr -zwklight. 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 154:53  Correct Percent: 74%  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 const1nat yx+08a+df1 2bz0raugjw ant velocity. Make a statement concey an0ad b+x1+g8 tr02zw1 fujarning its acceleration.

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
7#
 
Single-Choice ( 1.0 marks) (No. in Group 7/27) Whole-Paper View eid: 789  R:W 106:114  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 accely.gt18xp io1 deration is zero? Supporg x.1y it18podt 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 119:122  Correct Percent: 49%  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 direcos9cok,ne4 w my;fh-3tion when its acceleration is constant? Support your answer with an examps; 4nyf c,hoe3w-mo9k le.

Correct Answer:    
Mark Problem
9#
 
Single-Choice ( 1.0 marks) (No. in Group 9/27) Whole-Paper View eid: 791  R:W 134:73  Correct Percent: 65%  Difficulty: *****  
试卷已过期，处于只读浏览模式，无法保存作答
  Suppose that an objec r4k3(tu4mnnwvm v i4lyn;(l:t is moving with constant acceleration. Make a statement concerning its motio3m(nk :uly4vwnni (l4 mt4; rvn 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 114:108  Correct Percent: 51%  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 accelerationnh/u ap9pl82 dl3gk* d is decreasing? Support your a dp/ 29lna*pg3h ul8dknswer 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 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 hillfnh .nka-ea.( ob0qx0 of ice. Make a statement co-x (q.nae bkaofh.n00ncerning its acceleration.

Correct Answer:    
Mark Problem
12#
 
Single-Choice ( 1.0 marks) (No. in Group 12/27) Whole-Paper View eid: 794  R:W 129:91  Correct Percent: 59%  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 (- s-:yg bbxns1by q,muykppb+ )h5:hinitial and final velocit-)xyb: ysnb1+p ysbm-(bq:pgu 5kh,hy?

Correct Answer:    
Mark Problem
13#
 
Single-Choice ( 1.0 marks) (No. in Group 13/27) Whole-Paper View eid: 795  R:W 170:44  Correct Percent: 79%  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. Hof v;j il-bwlq.t7/ cr(wever, object A accelerates for twice the time as object B. What is the final speed of object A compared to that7ctv j(i;.w l-r bq/lf 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 165:30  Correct Percent: 85%  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 w j j c*sem*l pb5khaf 00qr39)qkm0c*both the distance traveled and the magnitude of the disr* lq*w0p0bha03qk kcjs ce9fm5*j)mplacement vector.

Correct Answer:    
Mark Problem
15#
 
Single-Choice ( 1.0 marks) (No. in Group 15/27) Whole-Paper View eid: 823  R:W 124:62  Correct Percent: 67%  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;1v * -k9u xblayb+: srht3eqcq/od d2/h in still water. How long will it take to move 12 km upstream in a river r9kstbbq; c/qevd-*lo 3d2ahx :uy+1 flowing 6.0 km/h?

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
16#
 
Single-Choice ( 1.0 marks) (No. in Group 16/27) Whole-Paper View eid: 825  R:W 124:54  Correct Percent: 70%  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 km 3vl5pwd4rmu + 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 148:62  Correct Percent: 70%  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 hours and 57 min. Whac8+qross9hti/v s*+wv - vvd 7t is the average speed of the ruv+ trs8d/s7+ *ivcwosqv9- hv nner 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 128:32  Correct Percent: 80%  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 40 h6-sgt0b4u aw0 km?

Correct Answer:    
Mark Problem
19#
 
Single-Choice ( 1.0 marks) (No. in Group 19/27) Whole-Paper View eid: 829  R:W 138:73  Correct Percent: 65%  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 vz : tij29k5k* mnyu3pyou look to the side for 4.0 s, how far do you travel3 jz9vyki2* :pt5nukm during this inattentive period?

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
20#
 
Single-Choice ( 1.0 marks) (No. in Group 20/27) Whole-Paper View eid: 830  R:W 92:157  Correct Percent: 37%  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 100orptl,3 op4 lrlh(;w5 s, your average velocity i,h l5to3;rpwo l4plr( s

Correct Answer:    
Mark Problem
21#
 
Single-Choice ( 1.0 marks) (No. in Group 21/27) Whole-Paper View eid: 831  R:W 109:94  Correct Percent: 54%  Difficulty: *****  
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  A polar bear starts at the North Pole. It travels 14 gjnk-lw qf71.0 km south, then 1.0 km east, then 1.0 km north, then 1.0 km west to return to itkjl -47wfq1 ngs 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 111:103  Correct Percent: 52%  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 z 5l,q(o5aasl:b -iwo u6/6 ivxdsye5the North Pole. It travels 1.0 km south, then 1.0 km east, then 1.0 km north, then 1.0 km west to return to its starting point. This trip takes 45 min. What was the-( vzob:5o u5sqylwxi6 l6i5es,d/aa 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 140:75  Correct Percent: 65%  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 for 110 miles. It th kpr)zrr; damgp n/w0(70)tfj0 xy dt7en 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 kdpnr07zx(pj)y0) wd7rm/ t0 a rgt;f from school?

Correct Answer:    
Mark Problem
24#
 
Single-Choice ( 1.0 marks) (No. in Group 24/27) Whole-Paper View eid: 834  R:W 119:80  Correct Percent: 60%  Difficulty: *****  
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  A motorist travels 160 km at 80 km/h and 160 km g;qo9e7 ) y l-x6ejkmwat 100 km/h. What is the average speed of the j k x)9ogmw-y6leqe7;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 145:50  Correct Percent: 74%  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 her7my3eq)i7lem .7 isl peo lx31jx te-9 average speedstxei)eqxmll 3e73 pm-il1jy97e .7 o 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 135:67  Correct Percent: 67%  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 q*: 2z +7n5lxhgokgbc/h south for 2.00 h and then at 250 mi/h north for 750 miles. What is the averageo:b+g k7l5gcx*q nz2 h 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 120:70  Correct Percent: 63%  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 anc4xw weftu*28 )c 6bi3wkpfuo/aiv/n9horman (the person who runs the last 100 m) for team8wnf*6wu/v3p obu xk 9 )2ei/ cf4atiw 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 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, dow;1mlo c)k pdcnv+7pz gm*b3b n.3xk* es the first necessarily have a greater acceleration? Explain, using examplesk 1dwx.b;pkvz3) bc*pcg3o n n m+7l*m.
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 m dyw;:2u8ruh h)8xw gxotorcycle that accelerates from 80 km/h to 90 km/h with the accelerationywr8x8hhwu g 2d);:xu of a bicycle that accelerates from rest to 10 km/h in the same time.
Correct Answer:    

Mark Problem
30#
 
Free-Response ( 1.0 marks) (No. in Group 3/7) Whole-Paper View eid: 10138  
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Can an object have a northward velocity and a southward acceleratw 1p4ape i9ek/ion? 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 whep at;nzyu)4i*kp/ 7sq n its accel- eration is positive? What about vice versa? If yes, g)7y;ks * uaq/pn4zit pive 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 bot91-1lzuax m1-r ajhl *qy6n/ sk qj:uzh the velocity 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 sxppp 2p:1c+c opeed as its acceleration decreases? If so, give an example. If not, exp1ppp2 c:+pcxolain.
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 xq6n:i h5mwh4.e5wmd.fb 6 yk traveling with a speed 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 60 km/4e: 566..hiw xfwmmdy5kb nqh h/min. Which car is passing the other as they come out of the tunnel? Explain your reasoning.
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
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