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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 coc7 jtn1ypk2 8f- ukis5c0 0tsynstant 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 time without reference to a pathgup 7d w.5;drticular direction is d.gu pw5;h7dt called

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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 circular track at an average spedp * yn-9w;jg.m +;grpwmc nagjfv7- *ed of 50 m/s and then comple*d-mj9fj 7 nanwc .yw;gv pm+g*;g- rptes a second lap at an average speed 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 v4h3a(t5,2d*bzm8.ahug fbfcpv n4ls at the constant velocity. If it continues, how far will it tcdfbh *(t z 85.3avpbga nf2, vu4mhl4ravel 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 that is sliding at 5.00li: k9xcu4k/ 1upgq. d m/s to the right across a frictionless pond. The boy then turn:x/ .kidg49l pucqu 1ks and starts walking on the plank at a rate of 4.00 m/s to the left, 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 isuek.le 0ify,, the av0,.u ki,el yfeerage speed of 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 along the x-axe gad 5ofsn60.f- 2 5vmn5vfacis. The graph shown below is a plot 5af 6 va02ne5.-fc mo5fdnvsg of the car’s velocity 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 travelicg8q6wkqc: ne 1zq, ,jng along the x-axis. The graph shown below is a plot jc1 6q,k:gzn,w ecqq8 of the car’s velocity in the 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 to the mot ae gw.3tf+m- z3ke3icion of a toy car traveling along the x-axis. The graph shown below it i+f-3mag.ekcw z3 e3s 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 flying due south fe6jg;,g 0nc lokhyz)5l8dx*z or the winter. At what point gxz zn6j hk l*;ly c),ogd05e8did 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 shows the position aild qbabqb)g*f.1t-dj ) prbld9s ( 4:nd elapsed time of a car starting from rest an)bdprd*q d(q)j:sgt -a1.bif l bl9b 4d 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 r huol;lc:, bh.4vl16ahs gjb2efer to the diagram below which shows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. The average acceleration during the entire 3 second intervalu,j:hchlv2g6o.hb 1ls; 4ab l 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 sfyno5r3-s7 r.97 k fiqsp1fmujkc 3g-hape of the velocity time graph for an object with the position time graph shown in the diagram at 9ysfg-j7ik3 7-q 3 1cpom.5f unrksfr 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 avf h+q tj3w,.i: .uhmrefer to the following information. An ideal elastic rubber ball is dmq3f +a.:h,vhujt.wiropped 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. An ideal elastye0jlo zu3x x/mh(+a iau 3u)/ic rubber ball is dropped from a h(uylxiza0m uu )ej3+/3o/xhaeight 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 oiep3,a9jm .btravel 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 x olnk4ui*q 7k7.bvg (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.
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 folloe5um3z be4ca2)n-ry kwing 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.
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 the following scenazsk*4f;qcwu gn2o *k jios3lhr 7(/ .brio: 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 rek/ s tlozwlj6+2 72ia7zriv;hfers to the 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.
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 a racyjrv*dv: ,ye k8 (6wbmp, across a horizontal table top and off the table edge. Which of the following would best represent a graph of the magnitude of the ball's acceleration vs time, :jd*6c8bkvr y yvew(?


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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 m q qj2u6:8kopznzs), between distance and time for an object that is moving along a straight line. What is the instantkjn:,om6 u szp28zqq)aneous speed of the object at t = 5.0 seconds?


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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 y:a g/ i5oaf6u2y9 nyjthe relationship between distance and time for an object that is moving along a straight l n/:foyu6 yia5a jy92gine. Between what 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 an initial sp-km ugm 6q4x- l1bc/bdeed of 12.0 m/s from a position 10.0 m above the ground. Ignoring air1 6c/4 -dguqmlb x-bkm 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 and2n9628+fegl gdms em (rwtl4 e uniformly accelerating across the floor. The time and distance traveled from the start are sedggsm+ 2m8 (lwtle9nre6 2 4fhown 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 gz0lu3kr p+n5m:/vkb u,f w ;istarting from rest and uniformly accelerating05v fk m + 3plb/uzikrug:n,w; across the floor. The time and distance 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 represents a toy car starting from rest and uniformlzxd;.1peqv g 9 rw+ zwuvnyz9-/p+-bly accelerating across the floor. The time and distance traveled fpv+p rw;-gnz9u.by/vxze 9 -qw+d1lz rom 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 koko7lmmy+x6*7 http t9. a-yaccelerating ball. The position of the ball each second is indic- mxt7t9y7ok6 oha+ mp*k tyl.ated.
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 ball. The position of th q3lbf) q/y2t l z1ik89bkhu.ae ball each second iskzhl) /.9qi8bb qylkufat 21 3 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 cirslhcrc44 w4h 0f) zqgx* g-,htcus clown on a unicycle moving in a straight line is shown in the graph hlqztg )s0c4hx- h rw*,cg44f 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 sty cs2)w,ex6wr / i 5bp+k9pxjiraight line is shown in the graph below2 recp)yk9i/ x5wbw+jsp6, xi.
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 surface of 45zv;l ,nirxy 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 motitx.i+:et qph+on of a marble on a table top for 10 seconds. For which time interval(s) did the mh:+ti+e.qx pt arble 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 accompanying graph describes the motion of a marble on a table togj.d 2w;,pxem jps v45p for 10 second p2d wv4e pj.5jg,;xmss. For which time interval(s) did the marble have a positive acceleration?


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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 graphbd8bg0l83x ten3f(xltd*m9 l describes the motion of a marble on a table top for 10 seconds. What is the marbles average acceler30xg8t (b lbedxm3d* 8nlf9l tation 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 uniformly fromebp6, v6upc bc+zb7v3 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 straight downward -7d7plt b /8h 2vh; b blghmht3pq1vy9with 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 following graphs could corry1u ah ol;ktpwap)787 ectly represent the motion of an object moving o h8pwtkl7)p 1a7yua;with a constant speed in a straight 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 motion of a toy car acdqq89dc.l f7jb:: 9 8d vxyw xwbb01rhross the floor for 10 seconds. What is the acceleration of t::byhbvrqxcb 97x d8df dq80l9.1wj whe 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 accompanying graph describes the motion of a toy car across the floormb; +9 davi9k/xs xpq6d gf5r( for 10 seconds. What was the total displacement of the toy car for the ;x ksix5+ vam9gb96/ d(rdfpq 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 g.u:2yroerb(s t.p z i*raph describes the motion of a toy car across the floor for 10 seconds. At what times or time intervalu os. rpez tri*b.2y(:s 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 i4 zpopmlneeh4.k+db 6w3 clj6 g;i3 g7n 4.50 s. Which one of the following choices best represents tp6dgl bh7cm e63i en;+4olpjk. wz 4g3he acceleration 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 velocity versus time curve shown. Which afx-2ammv /e-x*h*p, :b bcieof the following statements regarding its motion is f-mc*/ahibx a*-, v ee2mpx:bNOT 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 velocsbrdxl3*c 5zn4f 4jfuh) ,j ;od h6;ugity versus time curve showh*;3f;ogu6l hds r,)n5fdx zc ju4jb 4n to the 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 interval oep4t/cs 9)nqif time, a tennis ball is moved so that the angle between the velocity and the acceleratioceqnst4) /ip9 n of the ball is kept at a constant 120 degree. Which statement is true about the tennis ball during this 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 1f)v.bw.qr/y ksrfs. r/1ri :z50 kilometers apart and traveling toward each other.. r1/sk/iq..)rf zs byfrrw:v
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 x-axis. When the acceleration isuw il8;lvu77i9sgxlvkr v(e5m8w2a ; positive and increasinm7k8v8llea7gwul( ;vux9ri ;s wiv25g

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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 averag auazp).xp4 yye*o j9;e 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 following cholk/ fw-3o4 syqices identifies quantities that must havo f/s34wyq-k le 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 moves /t)i aar5li mej0 w.lfy0x-w9 $3.0\;m$ 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-tia m()0ymkgo+b me, $y\;vs\;t$, 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 ry-a/8 ubom8 )emu; qtjight along a one-dimensional track for total time T in two parts. ;8/ m)-m8by a uuqtejo
• 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 vexax6ou)t)h mm,fc 44s. time graph for the motion of a car on a straight track is shown in the diagram. The thick line repra4 ftmc6,o4ueh xx) )mesents the 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. time graph fo-nulnw hw;g42 r the motion of a car on a straight track is shown in the diagram. The thick line represents the velocityl- g2u nw4wnh;. 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 an object given bbd) ohs9krkt6)7tgu .(hrh x7y the position vs. time graph shown. For what time(s) is the speed of the obr7gts.9 k k)t)d(h6rh uoxh7b ject 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 of an object given by the velocity vs. time graph shoes7qyqj l,hevsw+0 nmds);u 5xd3,9a50 dk jgwn. For which time(s) is the acceleration of the object equal to 0?,esd, 0hq95vsnw57)u3xmdlg y0jj+q s ;kae d


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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 fixed t+(g hv; 3dh,g6k2ebq.k g 37ii zgoqocime interval of an h27,3kig .gg(d c ookqvgi z6q+hbe ;3object’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 horizontal lim4h shyqf,;a tz x3kw2h6q::bne 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 -egr ,le,o;qc dsm+k4trip in two parts:
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 releasajq )cn8k/ be f.xu;o-ed 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 reacheash* p-zjetb( r:l9a 3s the ground in a time 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. time k 3ud8,+qzwse*/ hlnh);uk4agi p2ki graph of a particle moving along a horizontal axis is shown. What is the total distance traveled by the partich z khni iwgqup, l)ku+*2eak38/;d4 sle 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 followingwapz fz42c91yz0jsh. u/ 2udv choices correctly identifies all of the listed situations for which there is a non-zero accelerati wd uyhsz/a.z 2 cjuf41vz90p2on?
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 object moving alo l7np.fci2i12w hek3k ng a line is shown. The object starts from rest at time t=0 s. At what time(s) does the object attain an chwfk7kp2e2 .i li13 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 velocityg8z* +jjfwc, )kd hzf3 along a line vs. time is graphed. Which one of the following choices best gives the proper interval zf,)f3dh*+8kw jgz jc(s) of time for which the object is moving away from the origin?


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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, eachakfxh2r4gs v01a; abb4jh3 u . with constant acceleration. At an instant of time, the information about ; ubxkh1j 4a3f.ara 24vs0gbh 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 ;8 x4vk6u pnajfxwr 6jf+et.,position $x$, 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 h3mo))p biutu3 bm z+0one of the following choices correctly describes the relationship between the average speed of thep o0+bmzu))b umi33 ht truck 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 following e;: nf7xhfyuv)i(qm m8tr1.hnpy;gl1 +if/ xchoices best describes the instants of time, at wh 7tfe8)y+mp ;u/g.xq; i nihl(y1hvmn 1frfx:ich 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 5kx*)gbnf5i 8rswr4i rest at the origin and will move along the x-axis. The acceleration vs. time graph for each car is shown. Which one of the following cho8 ri4gbsfxkw55*i) nrices correctly identifies the relationship for both 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 object moving on a horizontal line,us 5.ew ltje)bo; v 7nv ,dgxfa.p9d5 is shown. At what time(s) is the object moving l,.vtdp ,7gabee ndfj9 wouvx 5)5.;swith its greatest speed?


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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 follow5srtz2hfk ; m)ing the position vs. time graph provided.m2zh s5)ftk r; During what time interval(s) does the mass have zero acceleration?


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