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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: 匿名未登录  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 pcdja8h+(ajh fw*o+y2oyn si1sdh189. ii t.zath 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 dish.2j*r vh2inltance per unit time without reference to a particular direc.j *hn rvi2l2htion is 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 2j1de6 es-; : dg zjx16pmzxtkone lap around a circular track at an average speed of 50 m/s and then completes a second lap at an avera :gze1t msj-2 kdp6zxjx6de;1ge 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 s at the constant velocity. If it contiv2 3rveozohs6 i0ou,4nues, how far r vo3hviuo2 z0es6,4owill 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 is sliding at 5.00 m5zj;nx8 m9rw hj)3gu/:j tyup /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. jn3w: zju9h;8ptyrx g5)j m/uWhat 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 thec.+bxi 7lm ct6 average speed of the motorist on t+6xl cimtcb.7 his 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 refero9u)smhy65 ytwsr c) /s to the motion of a toy car traveling along the x-axis. The graph shown below is a plot of the car’s 5twh rc9s)omu/)sy 6yvelocity 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 mot*p. f c db):m 7dxwpf.8b3odmoion of a toy car traveling along the x-axis. The :dm8x).b3fwp*dbd mpo .co 7f 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 refers to the motion of a toy car traveling along the x-aqm i52tpc )ct(: j:rfvxis. The graph shown below is a plot of the car’s velocity in thepvj f:i:t)2(cqm ct 5r 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. tiux hs q,l/7sbno 6-74cgz9 d2xpbb+mjme of a duck flying due south for the winter. At whatb s mxb+ lbnh, q6u-zo27 s9gd4/j7pxc 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 xegkt 1* 3c8r jsq trnq;.7kw8ul:v5zshows the position and elapsed time of a car startir uxr.3gwjt :z s5 cqt1l7; kevqn8k*8ng from 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 thht,)xjhkgus1/:c -z;n g ktq1e diagram below which shows the position and elapsed time of a car starting from rest and uniformly accelerating in a ugt 1xg;h,sq: n)jt/kz1ck-h 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 fo;pfy)+ ay jy(md1d. bhr an object with the position time graph shown in f(b); ay1yjy d.+mph dthe 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 infufiy u(b70sm+7ns/ xyormation. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor and rebounds to its original h mb/yf+ yis7u 7suxn(0eight.
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 elas. ydnv1yto bzqxvl6h)ps: 3jf4bs; 32tic rubber ball is dropped from a height of about 2 meters, hits the floor ty obnh f) .:3p12qys3sx;vzjd6l4v b 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 travel wi.ivn+pn:w ,exp .3bj xth 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 sc37xe-xhdybvggth0*;ffi (w3 enario: 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 :e ,qnjhm /s,q2f .,pmof -mhvscenario: 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 scenarioqvb1 m51bk jfq c 3bu,rf*m4v9: 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 prf9few5568sn3 .bpla r(d pmthe 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 ro ap9.v8 mac8bolls down a ramp, across a horizontal table top and off the table edge. Which of av mc8a8.9pbo the following would best represent a graph of the magnitude of the ball'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 distan:2 ,sq./cgwmz l/loac,kz ed6ce and time for an object that is moving along a straight line. What is the instantaneous spees ,clcwz./ ,d: /2ag eozlmqk6d 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 the relationship bet (q1iq +sx 5p;hootar*ween distance and time for an object that is moving along a straight line. Between what times did the object have a non-zeror; hx*(+psoatq o5iq 1 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 -p,rrd:ne-0ijrz2s(4p q m jrdownward on Earth with an initial speed of 12.0 m/s from a position 10.0 m above the p-ej0r,dq-pr : 2i sz4rnmrj( 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 x o, zv/zyp/-ba toy car starting from rest and uniformly accelerating across the floor. The time and distance /-/bzz,px o vytraveled from the 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 represeno zudemy6y i*c*a287cts a toy car starting from rest and uniformly acceleuc *ea2oy76zydmic *8rating 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 represent y 9 p6 hn 6fj5cz17fubttc)es .g.vm.bvve,-qs a toy car starting from rest and uniformly accelerating across the floor. The time and distance traveled from the start are 5b g7c.f6tmj b vf6z9vh-,y)eqv tu ns.p.ec1shown 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. The position of the ball1sjh.**zx outn-t(f c each second *s -zn ft1utc( oxj.*his 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 uniformlyl7u) 3aj-y xbv accelerating ball. The position of the ball each second is indix- lyu37 v)jbacated.
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 clow: b8hxy +ygf /htu3x)x5h *dbbn on a unicycle moving in a straight line is shown x/f3 td+*)8 xy huxb:h5byghbin 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 i-ql+s3qcmhrl+36v h clown on a unicycle moving in a straight line is shown in the clv6m3 ri++-h qlqh3sgraph 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 freelqlph6 w vi-r+.y in a vacuum 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 tableuxm v2 (, hmr/anlpb62 top for ,upav xhm(26 /lr mnb210 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 accompanying g c7 q:fm c:9yfpb)bz6lraph describes the motion of a marble on a table top for 10 secypbc6:z 7c9b ff):qmlonds. 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 graph describes the motion of a marble on a taba c,tdqgwg6u;wx38o9-l8g3v/bxw3unn-rfi le top for 10 seconds. What is the marbles average acceleration between t = 3.3 s and t = 3.8 sw6g-og w83lcuub w3fg, dt3a8ixnqr-;9vn x/


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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 accelers641dt xxe 3la7 )ti/ *zlohvsates 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 straight dowj r0zc2v)4 qnr3f.ky vnward 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 following graphs could correctly represent the qzle4 (ly1--9wdbgyq nnx98r motion of an object moving with a constant speed in a st8g -y 1blql e4(r9ndnz w9yqx-raight 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 across thev2a57osbp dau;txd -3 floor for 10 seconds. What isaxsp-7vt5 d;o3d2uab 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 accompanying graph describes the motion of (*t3b*0;wd euaib qdra toy car across the floor for 10 seconds. What was the total displacement of the toy ca3t wdu*a*b0rb;iqd( er 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 describebv,*8c9mn: jlac- mwpd) v) ths the motion of a toy car across the floor for 10 seconds.v9:h p)a mnbwd -lm)c8cv* ,tj 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 4.5s-ywcc2yr*s9 v0ga s, 0 s. Which one of the following choices bes y ac2wg -s*,rc0vsys9t 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 following stwiko xa2r9y-w r: +x;jaka;yx xo- j2w ir9r:w+tements regarding 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 vee:qmejjrj2f uwo0vu8km:z 17g- . 4 lylocity versus time curve shown to the right. When does the ca e0lmjf4 ku r::g-e21jywq. ujmo z78vr 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 ball is moved so that t)3orf li f*l;the angle between the velocity and the acceleration of the ball is kept at a constant 120 degree. Which statemen)or t*lffl;3i t 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 ;w0c zipj0z1:q p*m syare 150 kilometers apart and traveling toward each other.js;pmi1 00 :*zqywcpz
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 th a7mu 0qr0zn( dj4b:qwe acceleration is positive and inc dqwuq:z 0ra(nbmj7 40reasing

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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 average vev+ba1.aa4 iq wr* f9sjlocity 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 choices idennxqnk55ra 9rl 9s5 y*.) p;gyhjcros(tifies quantities that must have the same direction ln*ac pxykys;rghrq9j n5)(5 59ors.?

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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 movenh2 5 9ihtoud(kz*;g0zyi qv 5s $3.0\;m$ 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-time, z /v5 kov*;p1 pje tp72upote0$y\;vs\;t$, 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 n20f;xt:) g/h eblwin-dimensional track for total time T in two parts.t whef b2 ign;x0)/:ln
• 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 howj :px(o+jiop/ z/nl f4y1.motion of a car on a straight track is shown in the diagram. The thick line represents th(oyjh:/npo jfl/w i+41x zop.e 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 motion of a car on a straigib8b nqnf j7+9 kkiq:,vb:og7 ,u1gcg2qp+rp ht track is shown in the diagram. The thick line represents the v,b g1g 7nf+ji8c qo :+rbq, ukvp7nkib:9pg 2qelocity. 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 by the positit +izat5 g pz0/hu0-eeon vs. time graph shown. For what time(s) is the spetpe z05z/0+-i geha uted 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 given by t4,ey8sxpbmt qkjbet, +rj bu n3w/8 :0he velocity vs. time graph shown. For which ti ,xkb4qe t0br:be+n 3sj 8my uptjw,/8me(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 eh e60kt,7wcg vs. time graph for a fixed time interval of an object’s motion, what qu 6kgc,wt h0ee7antity 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 a.7s43hhen n po8gtl *ilong a horizontal 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 t hb;4o ygz i-ikvqs0 , 8xwzb2dxc57,yrip 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 from rest andxsax5qek:k ri,;c pliqw4 * 2/ 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 fx2 tv93 egqxx kpy/3 s36z3lca 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 irbejsnr.mb/*gg2+i w n,v0+ a particle moving along a horizontal axis is shown. What is the total distance traveled by theej sn+. bg,+vnrw*2 bi/ ig0rm 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 a6gy3 fupn; og1l5(ht choices correctly identifies all of the listed situations for which there is a non-zero ac yho 6l5u ;(fn1p3gtgaceleration?
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. trocvn zd6:,3kb*ej o0ime graph for an object moving along a line is shown. The object starts from ro,cn3 b*:0j okzr6edv est 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. time is 7oy/ 3tyrlmu 7graphed. Which one of the followiy o 7rlut7/my3ng choices best gives the proper interval(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 horiz:jltu7u8 ergu vv;,*montal track, each with constant acceleration. At an instant of time, the information about the,vu;jvm7u: rul get8* 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 position rr9f0d:)ai th $x$, 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 u 5nt(5pnk8cnl. 6yzmthe graph, which one of the following choices correctly descntpk8c5mn6( 5ul.yz n ribes the relationship between the average speed of the 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 choices best describes the il*(w)y 4xqmq thg*0cu nstants of time, at which the carl(qh4 w*y)xqtu c0gm * 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 theh .u 0-3u:n98cr tugd q1tl+k5,eeldbc5onbz origin and will move along the x-axis. The acceleration vs. time graph for each car is shown. Which one of the following choices correctly identifies the rel 0btnt. +835 udol nhuk1ze5 c-dbe uc9g:rq,lationship 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. time3 av* y. 8buzmiet5sn gep/4*t graph of an object moving on a horizontal line is shown. At what time(s) is the objectzyn 8 em5*ta/eup4b.isgv t *3 moving with 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-axi8 lkykd (afy00;y qdq7s following the position vs. time graph provided. During what time interval(s) 7kd8 l ;y(aqyk0y0dq fdoes the mass have zero acceleration?


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