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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 constant speed around a circular path of ral 1k)b a/4q)x4 yzcwondius $R$, 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 refer8 ;6p6:tbycfephr.bzq n d8, 3sno-e vence to a particular direction is n b o8 bcq ,6zs:tn-e.v63h8fdye; prpcalled

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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 la1i 9qnwp g 3xcls.0n;ar.yhqi l)6z14klv oj8p around a circular track at an average speed of 50 m/s and thenqla4pn 1 c) lirzq;jk3h8 go0.ln9.x v s1yw6i completes 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 0.80w+a 2x-g, a70uacrjs2nhxq7g m in 1.0 s at the constant velocity. If it continues+gxw 7xj2s0u7qa2gc-, rn aah, how far will it travel 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 iso;3sf* aw;9u vehw *ei 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 left, relative to the plank. What is the speed of the plank re;evfo h*9w;uw ea3*is lative 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 traveb bl:ae2v/bgqm6x)lk;fn- j*f- gb)i ls 400 km at 80 km/h and 400 km at 100 km/h. What is the average speed i; l)f6bjxkvngm2- *lb/q gaf:-e bb)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 t:3m pubv,ksd4z+ o 7tmo the motion of a toy car traveling along the x-axis. The graph shown below is a plot of the car’s velocity in tho3,4bm7km puz+vd :ste 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 r.e n knd sl4y(5 zc7owinn16)traveling along the x-axids n5 4nklwn7 c)6oneiy(1rz.s. The graph shown below is a plot 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;ak8*qe(t)w e. ea;4 osfqu qy refers to the motion of a toy car traveling along the x-axis. The yq aa;uqqe;t) ks4.fo*8eew( graph shown 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 vej-h/kom2vtvooz 1o , /locity vs. time of a duck flying due south for the winter. At what point did the duck stooovmo12zt- kvo,/ jh/p 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 showsdqt8 5zf* p,m arf klbh6lk hv9l07-1q the position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. What was the average velocity of the car during tbhvd * m p67kk-1l0fl, 5 qhq8rlft9azhe 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 diagram below which shows the position and dtr2tiad1-4a2 xr5kkelapsed time of a car starting from rest and uniformly accelerating in a straight line. The averagt4r-dt1 2ika a rkd2x5e 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 fof1h33bj 08/spe /hj7krart *cm w5mer r an object with the positm0k7w5r/r/hcrbph 3t3jmas *fe 81e j ion 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 following information. An ideal elam bs3t0ocf- 0 w:u6roukei2t *stic rubber ball is dropped from a height of about 2 meters, hits the floor and rebour *3-ukmotofbu6:wt ec 02s0inds 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 informatio1g+lz9 ub l rkf:2ext:n. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor and 91 tel :rz+2ku:lx fbgrebounds 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 tra trkhk/gnl j3x k3k066vel 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 scwc u9z6gxk ruu ii9(:4enario: 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 scenario: At ple) p8u/g 4waagk-6e $t_0$, 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 llg8 qp/-eue t:s0on7 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 follovf4jga) h;gmu9qi2 r9u gl2;r wing 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 ramp, across a horizontal table t )+*dt b6yg+zhy6avpitnul4 -op and off the table edge. Which of the following would best represent a graph of the magnitude of the ball's acceleration *+)pbty 4hlau 6vnz dg iy6t+-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 gfjcu*9nk)w,l5sh .3y r :qnabetween distance and time for an object that is moving along a straight line. What is the instantaneous speed of sfgyrc q,hn k 3l):wn5*9au.j 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 the relationship between di ze34jvapdw0yym m8g *,sqn,:s kx7 ;sstance and time for an object that is moving along a straight line. Between what times did the object have a nonn0ak ss;,8 : pwysxj e3q7mz,d4y*mvg-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 initib*+vjcul/l0q s xt 61tal speed of 12.0 m/s from a position 10.0 m above the ground. Ignoring air resistance, the specbv*+60 jlu s/qtt1lx ed 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 frow:ce oh1/t: * ukwu(qtm rest and uniformly accelerating across the floor. The time and distance traveled from the start ar* cq: kowth/wut:e1 u(e 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 r*.wj6; ,p+ t ekfki9ht(denwue6 ou a1est and uniformly accelerating across t9te*6fow 1 . u(kdhpa 6 ke,ne;wtu+jihe 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 represen8)vjnraxb61, cdip7ohvnh8q 88 w/dj ts a toy car starting from rest and uniformly accelerating across the floor. The time and distance traveled from t8 h8d vbpwnc8oaxvj1i7/ndj6,hq r8)he 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 acceleratin ic4bvrnjjv14 ;jkh0 1g ball. The position of the ball e4vhij1;b4j ckr1 vnj0ach 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 ball. The position of the ax.rt)jp7ivn;y 6q j,ball each second is indicated. yv q;ip),xrja t6n.j7
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 li-:;cjtwy1ttho 0v2ryne is shown0 ;yj2owhttr:ct1vy- in 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 movingkmvd( bt w404k in a straight line is shd0b4tv (m4 kwkown in the graph 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 3 xo5ab0uv2fxo6; v1.tzhfjc near the surface 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 marble on a table top fad80 (dqgd:5lqum npp o:u 6(go 2,gjbor 10 5 uad8 nqg(jl20gqd (pd,m:up6oog: bseconds. 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 accompanying graph describes the mots 2 w* es1y/mj+:o4xghwcsx z9ion of a marble on a table top for 10 seconds. For which time interval(s) did the marblemy 1x:j9* h2xsz s c4/wgsowe+ 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 graph describes the motion of a mau ze(r 9rsi(0mrble on a table top for 10 se9ms(riz(ur 0econds. What is 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 uniformly from rest fo ,c.i +)uv ntn1fuz fb;goq5-kr 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 std/ uv zryf5(r,raight 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 fol7yw 05mbz28pe 5rw1fji gk:g glowing graphs could correctly represent the motion of an object moving w1fgbg2z85y ewpgr5 7j 0w:kmiith 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 o7 .tvev*iud w9f *4kbsf a toy car across the floor for 10 seconds. What is the acceleration oke 7 4d.t v*bsv*iwuf9f 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 accompanying graph describes the motion of a toy car across the floor qw,+18h4w)u/ wr hyz;a*e(q nloqeq z for 10 seconds. What was the total displacement of the toy4o r a*z);,(lhq 8 z wwyu1+nqqeqhw/e 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 7c 4 3kis0ceakxtv 7n75-gg+ y kzy6edgraph describes the motion of a toy car across the floor for 10 seconds. At what times or time intervals must the net force on the6-t i0 3 s+y7xnd5 ea7 c7kkzck4eyvgg 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 kmf/sx 7nv xk45j/hr in 4.50 s. Which one of the following5x4nks/7f jvx choices best represents the 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 of the follv bkh3p : o6t,r/kh2dzmw4 *-bo uzl(gowing statements rlkw4zh*tu:dvbzr 3,o p/ 2( h6mobg k-egarding 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-axiir .da *t1fth.bu)ho -s according to the velocity versus time curved1t. *o.-ufh)b rahti shown 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 of time, a tennis balj1,c41wbcm c7vl :z hjm- ki*ql is moved so that the angle betweeccb4l ,kqmw-ih:c 1 zjv7m j1*n 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 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 150 kilometers apart and traveling towardwu:m f(t6x t3s each other.u(s3fw6txmt :
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 is pfx1 pl3rqr.)1jvmdt) ositive and inc 1)d1mfv.lxjrtp)3 qrreasing

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48#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  07.12: The definitiopw(nny0lfc kr40r b/8n of average 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 o58wuzd6j u0 iwf the following choices identifies quantities that must have the s iwz0u6wduj58ame 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 mov kj*yem *s4nb2es $3.0\;m$ 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-*1 v 9hx+ nirum6vpnj,time, $y\;vs\;t$, 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+(k iel)085s l zaohov-dimensional track for total time T in (ov klzl0a8e)oi5 +shtwo 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 motd1o 21 k)dhnyiion of a car on a straight track is shown in y 12khn oi)d1dthe diagram. The thick line represents 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 for the motvbx+xje tprs5 8-o z19ion of a car on a straight track is shown in the diagramr8-5vsotb e x+p1 jxz9. The thick line represents 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 an object g70 4ix5)ek5dz yjib-grad:g piven by the position vs. time graph shown. For what ti-kr 5adi0bd)z:g5ipyj eg 47 xme(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 of an object givenps-x3 7zlr8,l+ jto ap;g: kob by the velocity vs. time graph shos p abkx8;oj ,z gr-:l3ot7+plwn. For which time(s) is the acceleration 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 f7qm o4/s.d :kr9qy dne93hjt kor a fixed time interval of an object’s motion, what quantity has been determined for that o. eqk :j7/ymhs t9r4do3qk9nd bject?

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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 line with increasindx5s f+(kznh xgwe7 5.g 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 q ( lwqv,b7.lztrip 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 released fromhv8 1 4dgxuo v :jyao0avr2cvz-2 :pe;5y olk; 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 object7pc5 avlc0hyup1o9id*hm1 nu l726ah is released from rest and reaches 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 graph of a pb8c9mob i xc5)article moving along a horizontal axis is shown. Whatobb m)9ic8c x5 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 all of the ln q8 bqoyw ;,.rkuh.7y 3mif.w7r+rsx isted situations for which there is a nok7 qu wwnbsh, om8..rxri;yq+r3f.y7 n-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 object moving along a line is sks31)jyn4njxqm )i2d v8eon) hown. The object staqs) 3nimn 18ejxydkv) 24o )jnrts from rest 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. timeo30i5bp pgah2ij d-/ w is graphed. Which one of the following choices best gives the proper interval(s) of time for which the object is movij gphdi3iao2b /-0pw5ng 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, eachsy5+o/z-ngm 2 xrwud ( with constant ac (5zu2or dnx+myg /ws-celeration. At an instant of time, 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 ,cx pp rlv.9v+;/i j8s4cfd jznpz2g4a 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 one of the following choprpva0n uw 1tj+(1f/v ices correctly describes the relationship between the average speed of the truck to that of tr pv(ja/10+tnpfu 1wvhe 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 choices best describes the lumhv*)l -p,id 1qbl+mzkt2*instants of time, at which the car and truck trkvdl-utz+2mmb *ql)i *plh1, avel 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 wifyg 7hw7f; qga*3 rw.+ 7qurtill move along the x-axis. The acceleration vs. time graph for each car is shown. Which one of the following choices chr i. 7f*yrq;7+g3 wfgaqutw7orrectly 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 line2r;tgi2,tf wlsz x(qg2cn+ue4c1* 3b2nk itu is shown. At what time(s) is the object moving with its greatest spel 2u 2k23 2uqwzn41*(t gnbsr;fcixg,t+ tc ieed?


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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 position vs. tc 6s.+wyn 6 g*jcnhl*lime graph provided. During what time interval+cnn6*l chsjgy*6 .wl (s) does the mass have zero acceleration?


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