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习题练习:Physics Bowl by Topic 2: Kinematics - part I General Motion

 作者: admin   总分: 72分  得分: _____________

答题人: 游客未登录  开始时间: 24年03月31日 09:50  切换到: 整卷模式

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1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.10: A particle travels at a constant4w.j, dmrwzjs8 bwi.kj-i3 w uh040py speed around a circular path of radius $R$, if the particle makes one complete trip around the entire circle, what is the magnitude of the displacement for this trip?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.01: The change of distance per unit ti,7(9dtzz(gcw)p8 fj+vlumm r0pyx g)h 4zb t(me without reference to a particular direction is call j8l70cytz(gm4bpwv)+ g rzumth,f(zpdx) (9 ed

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  12.29: A vehicle completes one lap around a circuzcc 0zed 8f1s6l;x5b dy3t4q wlar track at an average speed of 50 m/s and then completes a second lap at an average 3z 1wb5d8c6 cz ;s4qtf0 ldxyespeed of $V$. The average speed of the vehicle for the completion of both laps was 80 m/s. What was the average speed $V$ of the second lap?

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  95.03: A toy car moves 0.80 m in 1.0 s at the constant /7 toxgkw)pkc ,fx/-e velocity. If it continues, how far will it trao p,-gxc/wkk x e7)ft/vel in 3.0 s?

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5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  05.34: A 40-kg boy is stationary on a 30-kg plank thvsnyd mz4 4,c;h+ pd6,gpjb k6at is sliding at 5.00 m/s to the right across a frictionless pond. The boy then turns and starts walking on the plank at a rate of 4.00 m/s to the leftz66;v pb+jpgc, 4d smhn4ykd,, relative to the plank. What is the speed of the plank relative to the pond now?

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  97.18: A motorist travels 400 km at 80 km/h and 400 km at 100 km/h. What is the2vo :e5 fqwsm( average speed fw(ovqm 5:s 2eof the motorist on this trip?

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7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  97.20: This question refers to the motion of a toy car traveling alo6j iz 8c/nt+y/mkhj0 ong the x-axis. The graph shown below is a plot of the car’s y jk/ / otij8m+0hc6nzvelocity in the x direction, $v_x$ versus time $t$.
During what time interval was the car moving towards its initial position at constant velocity?


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8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  97.21: This question refers to the motion of a toy car traveling +me 5(r*h(ur: bj tuwnalong the x-axis. The graph shown below is a plot of the car’s velocity in the t*r +5(muw:uhr(jnbe x direction, $v_x$ versus time $t$.What was the acceleration at 33 s?


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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  97.22: This question refers rqrakf 8ev62yj jf+8 ,to the motion of a toy car traveling along the x-axis. The graph show2frqj a vy68j rfke8,+n below is a plot of the car’s velocity in the x direction, $v_x$ versus time $t$.
How far did the car travel during the first 15 seconds?


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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.15: Given the graph of the velocity vs. time of a duck fl* 12v4 pwseklqying due south for the wi2wsk14q*p levnter. At what point did the duck stop its forward motion?





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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.17: This question refer to the diagram below which sfzapt8bsk)h s28hgnv.:; z8dhows the position and elapsed time of a car starting fro z8k;a h8)b.zvf:sdg np2h t8sm rest and uniformly accelerating in a straight line. What was the average velocity of the car during the third second?


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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.18: This question refer to the dia( jjwcob4hn8fia wzv,f*y:*+gram below which shows the position and elapsed time of a car starting fromofv + (w8*cjh i wabfn4j:*yz, rest and uniformly accelerating in a straight line. The average acceleration during the entire 3 second interval is closest to


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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.20: What is the shape of the velocity time graph for aniq c- d4xm/,cd object with the positio d,ci/cx m4-dqn time graph shown in the diagram at right?


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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  00.28: The following question refer to the followingn6 uci:eptt* xl)c4:b information. An ideal elastic rubber ball is droti4:)e:p6 uxctn c*blpped from a height of about 2 meters, hits the floor and rebounds to its original height.
Which of the following graphs would best represent the distance above the floor versus time for the above bouncing ball?


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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  00.29: The following question refer to the following information. kpqi 568kmp4u63 tmw tjr9v3 uAn ideal elastic rubber ball is dropped from a hei9m q v4j6wkpki5p8 6r3mutu3tght of about 2 meters, hits the floor and rebounds to its original height.
Which of the following would best represent acceleration versus time for the bouncing ball?


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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  00.39: If a boat can ip.( 9tjb * tlwz6m;yt+yshr/ travel with a speed of $v$ in still water, which of the following trips will take the least amount of time.

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17#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.01: The question refers to the following scenarior wi .eq5v)jd ajl-2cn8s93kz: At $t_0$, two cars moving along a highway are side-by-side as they pass a third car stopped on the side of the road. At this moment the driver of the first car steps on the brakes while the driver of the stopped car begins to accelerate. The diagram below show the positions of each car for the next 5 seconds.
During which time interval would cars #2 and #3 be moving at the same average speed?


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18#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.02: The question refers to the following ajf 8r vo*-*(yso5v v0m .dio kr;m6gnscenario: At $t_0$, two cars moving along a highway are side-by-side as they pass a third car stopped on the side of the road. At this moment the driver of the first car steps on the brakes while the driver of the stopped car begins to accelerate. The diagram below show the positions of each car for the next 5 seconds.
About what position after $t_0$ would car #1 and car #2 have been side by side?


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19#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.03: The question refers to zly lv +n64rv89 b32:hbqwp6j4 v yzmbthe following scenario: At $t_0$, two cars moving along a highway are side-by-side as they pass a third car stopped on the side of the road. At this moment the driver of the first car steps on the brakes while the driver of the stopped car begins to accelerate. The diagram below show the positions of each car for the next 5 seconds.
Which of the three cars had the greatest average speed during these 5 seconds?


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20#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.04: The question refers to the following s7 skmqs8fb 3d+cenario: At $t_0$, two cars moving along a highway are side-by-side as they pass a third car stopped on the side of the road. At this moment the driver of the first car steps on the brakes while the driver of the stopped car begins to accelerate. The diagram below show the positions of each car for the next 5 seconds.
If car #3 continues to constantly accelerate at the same rate what will be its position at the end of 6 seconds?


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21#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.33: A small ball rolls down hvltc-/2 r4hy hjj-a7mdgdkv/ j. 2zqzqo*;/a ramp, across a horizontal table top and off the table edge. Which of the following would best represent a graph of the magnitude of the bjh y*tl/vqvjmz-2 h -co qg;jar k72/. dd4z/hall's acceleration vs time?


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22#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.01: The graph represents the relationship between distance and tizx +29ah1n yiame for an object that is moving along a straight line. What is the instantaneous speed of the object at t = 5.0 secondnh12+z a ay9ixs?


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23#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.02: The graph represents the rxk 5a z.38db z4hh+qlpelationship between distance and time for an object that is moving along a straight line. Between w.zp h 3 5b4k+dz8qalhxhat times did the object have a non-zero acceleration?


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24#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.07: A small object is thrown straight downward on Earth with a6id- gys;vvy 4n initial speed of 12.0 m/s from a position 10.0 m64-v igvsyyd; above the ground. Ignoring air resistance, the speed of the object when it reaches the ground is

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25#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.11: The diagram below represents a toy car starting from rest and uw.ernwr1fgeyuibgh; f,iud2 gx( c15 q : 8,*eniformly accelerating across the floor. The time and distance traveled from ,nfxhfr1gwu,.e1g8 eyu *w5rei (qi gc:b ;2dthe start are shown in the diagram.
What was the average speed of the cart between 0.1 seconds and 0.3 seconds?


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26#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.12: The diagram below represents a toy car starting from rest andrxiigzc3 36b9q 2z4 wb uniformly accelerating across the floor. The time and distaq2z3irbxgw 4bc i 963znce traveled from the start are shown in the diagram.
What was the acceleration of the cart during the first 0.4 seconds?


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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.13: The diagram below represl dyoe0i/xxq4p 5t3ws.f5//1 ljatzqents a toy car starting from rest and uniformly accelerating acrx5qftj 0itx1 dl./oz q /4p5s3yela/w oss the floor. The time and distance traveled from the start are shown in the diagram.
What was the instantaneous velocity of the cart at 96 centimeters from the start?


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28#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  04.08: The diagram shows a uniformly accelerating ball. The9z9u4l pnjl;x 43 l,*rw fgfrr position of the ball ea9jgf94 z4lr;ruw,3* pllrfxnch second is indicated.
What is the average speed of the ball between 3 and 4 seconds?


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29#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  04.09: The diagram shows a uniformly accelerating zi -q.-3dkg-ggma f,x ball. The position of the ball each sef-m-q-3i,xdkg gg .az cond is indicated.
Which of the following is closest to the acceleration of the ball?


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30#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.17: The motion of a circus clown on a unicycle moving in a straight lity 1di2;kkqz :ukx , tc+3x:jjne is shown :ykit t3 1, kz 2+:qjxkjd;cxuin the graph below.
What would be the acceleration of the clown at 5 s?


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31#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.18: The motion of a circus clown on a unicycle moving in a straight bmra(5 inw2/p8i/y zfline is shown in the graphaipr f/5 myi(/z82bwn below.
After 12 seconds, how far is the clown from her original starting point?


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32#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.04: When an object falls freely in a vacuum near the surfac;fw - 2d( 7h6yxffswm guh9csdie+,0me of the earth

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33#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.11: The accompanying graph describes the motion of a margc.x ,xe(fxs ,ble on a table top for 10, cxxe,.(sg fx seconds. For which time interval(s) did the marble have a negative velocity?


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34#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.12: The accompanyingr l7 (t,*(rx1pw2s xepf: xugn graph describes the motion of a marble on a table top for 10 seconds. For which time interval(s) did the marble have a positive accelerapt1uxpx2(e fwg7r*x :(rln ,stion?


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35#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.13: The accompanying graph describes the 4 l 2tv6nrsgefm79 u14rvt:4 aomh g0zmotion of a marble on a table top for 10 seconds. What im24t r vvg fzoeta7169 mul:n4h0rs4g s the marbles average acceleration between t = 3.3 s and t = 3.8 s


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36#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.20: A car accelerates gnqswj)3f1q ;uniformly from rest for a time of $2.00\;s$ through a distance of $4.00\;m$. What was the acceleration of the car?

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37#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  16.06: An object, thrown stj2(9kbd iw4 sw .ggp4araight downward with a speed of $20.0\;m/s$, takes $2.00\;s$ to reach the ground below. From what height above the ground was the object thrown? Ignore air resistance.

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38#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  04.03: Which of the follo,m4f3s7tzc h* ft )orawing graphs could correctly represent the motion of an object moving with a constant speed in a straigcffo z4hstr )a*,7m 3tht line?


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39#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.24:The accompanying graph describes the mot (t1k;v5o f/1xqkakz qarp6t7ion of a toy car across the floor for 10 secokt(kq pft1 k16azr/ox5;qa7 v nds. What is the acceleration of the toy car at t = 4 s?


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40#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.25:The accompanyi4v.qx(c(pa49doe+:vg vmja lkf /ip3 ng graph describes the motion of a toy car across the floor for 10 seconds. What was the total disp:agj v/a m4xlvo3(q .+cpk4 fip(evd9lacement of the toy car for the entire 10 second interval shown?


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41#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.26:The accompanying graph describ 4/govv.gc2 vnes the motion of a toy car across the floor for 10 seconds.4/o cv 2vvng.g At what times or time intervals must the net force on the toy car be zero?


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42#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  16.03: A car accelerates uniformly from 0 km/hr to 60 km/hr in 4.50 zm -u)r2 ce:ays. Which one of the following choices best represents the aez ) uca-2y:rmcceleration of the car?

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43#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  06.07: A car has the velocitdok2)r9v r8c ay versus time curve shown. Which of the following statements rkcr9 vo82)a dregarding its motion is NOT CORRECT?


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44#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  07.17: A toy car moves along the x-axis according to the velocity versus time cud/5l4ajf )a)mu-t3yr h3y gzbrve shown to the5d)a-bm th/433f)yl gurj a yz right. When does the car have zero acceleration?


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45#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  06.22: During an into bwy,eo+/x n- z8--arxx d+rxerval of time, a tennis ball is moved so that the angle between the velocity and the acceleration of the ball is kept at a constant 120 degree. Which statement is true about the tennis ball during this +z+ xr xwno-oe8x,/yb-dx ar-interval of time?

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46#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  07.03: Two automobiles are 150r5:v akkp/o okpi*:;y lra 5q6 kilometers apart and traveling toward each other.opo*a5iavk/ q:kr y 6r5:lp; k
is moving at 60 km/h and the other is moving at 40 km/h. In how many hours will they meet?

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47#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  07.04: A particle moves on the wqh: :wq 2+ixo0gfyh( x-axis. When the acceleration is positive and increasing:x+w q(2gfi:q owh0h y

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48#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  07.12: The definition of averan;v- kfp5ir -yge velocity is

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49#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  16.18: For any motion in two dimensions, which one of the b1h4h-o/:/s ewlz lwsdxf m (d3cc; z-following choices identifies quantities that must havee (zl c;3s/-/hxzf-h c d1wb4 o:dlswm the same direction?

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50#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  09.17: A toy car movxbsr4p /(: qt)5wsslees $3.0\;m$ to the North in 1 second. The car then moves at $9.0\;m/s$ due South for 2 seconds. What is the average speed of the car for this three second trip?

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51#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  07.05: The position-tm+ 2w7l(mn qqlime, $y\;vs\;t$, graph for the motion of an object is shown. What would be a reasonable equation for the acceleration that would account for this motion?


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52#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  09.31: A car moves to the right along a one-dimensional track for v*5l+e4 ;jbcauj9i6ptegw 4b total time T i5gju 64lc;e +a pvtw j4b9ib*en two parts.
• Part One: The car maintains constant non-zero speed V for the first $\frac{3}{4}$ of the total time.
• Part Two: The car accelerates uniformly to rest during the last $\frac{1}{4}$ of the total time.
What is the ratio of the distance traveled during Part One of the trip to the distance traveled during Part Two of the trip?

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53#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  08.23: The velocity vs. time graph for the motion of a car on a straight track ia0matr 4 3toj-8pn ze0s shown in the diagram. The thick line represents thrn j8a4pz-at0et 0om3e velocity. Assume that the car starts at origin $x=0$. At which time is the car the greatest distance from the origin?


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54#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  08.24: The velocity vs. xcjb2. 1z7vl)h-hrc21lw o iutime graph for the motion of a car on a straight track is shown in the diagram. The thick line represer-2 lio7.bx2jc)vu 1 hzh1lw cnts the velocity. Assume that the car starts at origin $x=0$. What is the average speed of the car for the 10 second interval?


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55#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  09.08: Consider the motion of ayh4gxh)7i jot zp7f vj3vf,1v-8 adh ,n object given by the position vs. time graph shown. Fp d,og) h4xj7z8v,ah fvh3 tvfj17 -iyor what time(s) is the speed of the object greatest?


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56#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.11: Consider the motion 8dtb9k,o,qr7c ubzv sv/;1 txr-cp2h of an object given by the velocity vs. time graph shown. For which time(s) is the accb1b8 vo/tk-xqzuh rr7,spt ,;c v9d2celeration of the object equal to 0?


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57#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.24: By computing the area under the acceleration vs. time graph for a(p z 1j8j b,0tpisd x0:t 1picg6daql7 fixed time interval of ap,dd jj p 7btz:g6ctspa1i(qi0 8xl0 1n object’s motion, what quantity has been determined for that object?

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58#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  11.08: An object moves along a n qrvs :h4pwp.*a 3u ,6amgrm6horizontal line with increasing speed.
choices could represent the signs of the velocity and of the acceleration for the object to achieve this motion?

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59#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  11.14: A car makes a trip in two parts:c4wq5zh;d8ps p z427y/wiz l(km)mu z
Part 1: it travels a distance of 800 m at a constant speed of 4.0 m/s.
Part 2: it travels a distance of 1200 m at a constant speed of 20.0 m/s.
What is the average speed of the car for the entire two-part trip?

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.02:A small object is releasedan5 xl2jxbplhux 6))rv0; mi0 from rest and reaches the ground in a time of $2.50\;s$. Neglect air resistance. With what speed does the object reach the ground?

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61#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.03:A small object is released from rest and reaches the ground in a 4.wd 9tjc1r fjtime of $2.50\;s$. Neglect air resistance. From what height above the ground was the object released?

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62#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.17: A position vs. tie72 bmx g8b;po3/xu w1ta)xbzl5 qg: ume graph of a particle moving along a horizontal axis is shown.q:beg15m7bu82t;bwazo) p/ g3xxlu x What is the total distance traveled by the particle from t=0 to t=10s ?


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63#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.18: Which one of the following choices correctly identifies allt28/hk0yyd -egitp s , of the listed s2-e8d,tyhkt0 psgiy/ituations for which there is a non-zero acceleration?
Situation I : A point object moves in a straight line with increasing speed.
Situation II : A point object moves in a circular path with constant speed.
Situation III: A point objects moves in a circular path with decreasing speed.

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64#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.32: An acceleration vs. time graph for an objcgwv, l3erk :: +plmla h;p,r67k8aknect moving along a line is shown. The object starts from rcl+pnpkk 8ve:h m, ak6a7, :wgllr;3rest at time t=0 s. At what time(s) does the object attain a maximum displacement from its starting position?


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65#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.17: An object starts at the origin and its velocity along a line vs. tim b0kx3ugvu.210 n hor o9a3mboe is graphed. Which one of the following choices best gives the proper interval(s) of time for which the object is moving away from the 9.bxbam3vu3gkh o1 2ou0 nr0 oorigin?


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66#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.09: Two cars are moving to the right on a horizontal track, each with 38e(goe:ld e wd-j l2hconstant acceleration. At an instant of time dl(dee8ego 2j3-hlw: , the information about the cars is shown:
Car #1: position = 125.0 m; velocity = 13.0 m/s; constant acceleration = $1.5\;m/s^2$
Car #2: position = 80.0 m; velocity = 9.30 m/s; constant acceleration = $5.5\;m/s^2$
During the next 1.0 second of motion, which one of the following choices best represents what happens to the distance between the cars?

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67#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.14: A particle has a po:x4 jcxwj /ximjg 3-8isition $x$, as a function of time $t$, given as $x(t) = -15 - 25t + 10t^2$. Which one of the following choices represents the magnitude of the particle’s acceleration? All quantities are expressed in base SI units.

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68#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.41: For the entire time shown in the graph, which one of the fol7zykva.+ ro 82+wkyl glowing choices correctly describes the relationship between the average speed of the ty+yzwk+kl2.ar7g o v 8ruck to that of the car?


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69#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.42: Which one of the followm4vf/s /o rwm(ing choices best describes the instants of time, at whimrvswf /(/mo4 ch the car and truck travel with the same speed?

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70#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.30: Two cars P and Q, each start from rest at the origin and willayw *9p9kdg st2 ;qs4t8 /veom move along the x-axis. The acceleration vs. time graph for each car is shown. Which one of the following choices correctly identifies the relationship for bowt8vmep9/s 2 otg*y9 sq4 k;adth the speeds $v$ and the positions $x$ of the cars at time T?


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71#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  16.02: The position vs. time graph of an objez i0s)i-jha92.d anauct moving on a horizontal line is shown. At what time(s) is the object moving with its greatest spee2du iis-0n9aa) a hjz.d?


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72#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.08: A mass moves along the x-axis following the positikansz,h omb* /3i/(yxon vs. time graph provided. During whaksyn (3z b/hia, xmo*/t time interval(s) does the mass have zero acceleration?


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