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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 circulaf1j n f)xl,ebt *2)p-7kellxlr 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 rg4ah3c k h/tvi)/of xh.v qnj9*:n9ypeference to a particular directiovg/n*:knhafyhqp.to v94 )c93xjhi /n 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 one lap around a circular track at an hs.(g)kxl;nl 0uy6luf :1 zrvaverage speed of 50 m/s and then compl:h lk.)ll0;ru6zsgv n1fyu( xetes 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 14 e/sy wb1juls at the constant velocity. If it continues, how far wilw1u/sy jb1e 4ll 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 se0doy5we-p ajpqkf 9xe1v -.1liding 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 spkjp9f5oq-.wy e0dxe11pea v -eed 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/t j9(mywujt34 hbgh0 at 100 km/h. What is the average 0yth4gj9m t(hu/3 wbjspeed 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 traveqx3 ,zpkoz1*7 iwudc vr :b1l+ling along the x-axis. The graph shown belopbokdvr3 i 7+,z 1qc u*wlxz1:w is a plot 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 traveling along the x-ax;dmt-wll( pz;6 3uah7 r: g jn0jx5kekis. The graph shown below is a plot of the car’7r 5z:ag nt6xm-(pklkw;ue;j0h dl3js 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 a itjh,:ys*z f(long the x-axis. The graph shown below is a plo(*s,:ih f ztjyt 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 . c chh* dfk,82siey*jvelocity vs. time of a duck flying due south for the wc,8i2 jh.* kf hcey*dsinter. 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 shows th0fi (y,;iql8t.u z m v zpjlk8-j7agt*e position and elapsed time of a car starting fromlij (m-0j,*l.ztua;8vfzk typ8 giq 7 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 diagram below which shows the position an y)a9 *tiu;nllhn; 93bas1 qojd elapsed time of a car starting from rest and uniformly accelerating in a straight line. The averag*n9ajo; iat)sln lbuqy 91 h;3e 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 sha2 p8qmaz6 ea ap;64rovpe of the velocity time graph for an object with the position time graph shown in the diagram at ri4av8ezpao6q 6map;2r ght?


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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 tlpu0m 9m ktbt3 p( xxhb88pkn *2w)h8fhe following information. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor and rebounds to its or 2xt8bfw0 x*p)mmbk h3(l8p8ptunh9 kiginal 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 questio3d;kx* 2z hnypn refer to the following information. An ideal elastic rubber ball is dropped from a height ohx k2pzd*y3 n;f 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 travel wimu+t het.k rhj9m1un31 h a3q:th 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 fq:(m8f8 vu tklollowing 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 rze b2/q)x z8deefers 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.
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 th*:a+ rvp v.byae 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 +c p2py.mjp rvz8w*:pfollowing 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 top and off th38vpk.pkbj tn v z56w/e table edge. Which of the following would best represent a graph of thezk. 53p8 6jnvvtpb/kw 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 reb6jbr;lc +j:dz;4an p z:jf4nlationship between distance and time for an object that is movingbf4;lcz6d nr+ zn: :jbp;jaj4 along a straight line. What is the instantaneous 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 the relationship between distanc ht *(f-rv+(mld en5xkirws81e and time for an object that is moving along a straight line. Between what times did the obw xft- sn+ drel k(mv51(8i*rhject 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 i)rklftuei+gajn:7 4 0b/ iyx, nitial speed of 12.0 m/s from a position 10.0 m above the ground. Ignoring air resistance, the speed of the objec gkeib+ :0un 4yta/,l)xri jf7t 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 uniformly.65ub;9j,qylb )cqlxtx: n p l acceleratintpx)u6 :l;jlc9.bylx, 5nbqqg across the floor. The time and distance traveled 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 belo9s6s g: yrq:p hvs)c)kegt-a5w represents a toy car starting from rest and uniformly accelerating across the floor. The timpcgev5 t ys) 6grkss a:9hq-):e 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 represen b7q+v1eatxb/w8ra w6wc.b 2 kts a toy car starting from rest and uniformly accelerating across the floor. The time and distance tbbrx +87vaq1bw t./c eww 2k6araveled 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 accel;2o wwibv jk90erating ball. The position of the ball each second is wio0bkj 9;2w vindicated.
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 shjjd+ j/gipm ;vx4cb, nn;+6 vlows a uniformly accelerating ball. The position of the ball each second is indi,jp;n/jvd l+m 6bg+;nj4 ivxccated.
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 movib8:fy m*z cdl9ng in a straight line is shown in th fc mz8dyl9:b*e 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 6hl;h c66ry bbc3 1f+zoyvi2jclown on a unicycle moving in a straight line is shown in 6i b13lz c +hy2c;yhov66rjbfthe 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 objeco uv2p0)p1utbb4 j5c dt falls freely 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 ;zry ppwmkim3*n:,u9rguw mj -w86 f*a marble on a table top fo k r;yz-j n6,3i8pgwpm:m9 u wm*ruw*fr 10 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 graph describes the motion of a marble on a table topc gikp; usw .ydcn5 9j)hr;2w) for 10 seconds. For which time interval(s) did the marble h.d; y cu jnpg))wh2r;9s wi5ckave 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,3yhcrf8 (3mm w foo-z:a8zmi motion of a marble on a table top for 10 hm:o3 i fc- a8fm,zwmr8y3o z(seconds. 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 bv54 +tl ilsah)-qx is74mv4yfrom 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 straiahjy:0 /v6 vgbw rbc(3ght 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 following graphs could corrq zmk 4cl*uo0/bj2 vp.6dqk1iectly represent the motion of an object movini.2/qbjlc 0qo4dz*kum pv 61kg 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 across the floo34 /is2 k4ov/ofnszu br for 10 seconds. What is the acceleration of the toy/u/4onb2 3i4skz fovs 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/kl.4jlzldi;xm 5 bd6p4gl c1 the floor for 10 seconds. What was the total displacement of the toy car for the entire 10 second interval shown? l6jc .p4bi;g kl4lmxd5 zd1l/


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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 describes the motion of a e2p m.mj6 wcdy2l,wu *toy car across the floor for 10 d 2.*ejc2m m,wyw u6lpseconds. 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 twp k0mu ,(cx+rc7 9llto 60 km/hr in 4.50 s. Which one of the following choices best represents the acc w+,(7mtpc9l 0xrlu kceleration 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 velou s;n4hv+6ju mcity versus time curve shown. Which of the following statements regarding its motion is NOT COR+j vmu;u4s6n hRECT?


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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 alq1 w*9gfv9 k39k9bwyb 3ouk naong the x-axis according to the velocity versus time curve shown tokb93 u kkowgf919 aynqv b9*w3 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 hy+lie qh+ 1/jof time, a tennis ball is moved so that the angle between the velocity and the acceleration of hqyie+h j/ +l1the 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 toward each( b1:b qds8wifh2+ d.noylzlw:2 zh/a other.oawbq dz+d2h:1liwlb . hsy z/(:2fn8
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 positive qh/3cr t xy-9q2d7s/ez -yta s/sj(ch and inc-qc/s/x tch9-h/ 7d2ys(zqj3 sya e rtreasing

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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 vela deldgj)m(lvy p3 0:e-si*z j1j 4v)rocity 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 dimensio( ghm.j5j/gds ns, which one of the following choices identifies quantities that must have the same di sdj /jg5h(gm.rection?

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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 move3almzc a t9)z t/*ipj+s $3.0\;m$ 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-tisk( 3myqhl( *hme, $y\;vs\;t$, 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 toqaug,r-7f /eu the right along a one-dimensional track for total time T in two parts.erg7-q, / uauf
• 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 1m*s4 *l sjh5rgoj8zzis shown in the diagram. The thick line g m1h jzo5ls*4 jrz*8srepresents 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 fog/mmfn9kl kn 8 9)c ws;bpe 4d3lfr1e4r the motion of a car on a straight track is shown e lm34bfegmc8n rw pdsf )914k/ ;kl9nin the diagram. 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 motiolk,ys3w;2v, :0nzaimwf vzt1 n of an object given by the position vs. time graph shown. For what time(s) is the spet:i fwlanwv 021zzs mvk3,;y,ed 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 the velocity*a zpzl ;e)(lqh6 yzjyokg -8ca3), vh vs. time graph shown. For which time(s) is the accelerz ay)6hy*cg-j8a l,v)e; (qlzho3 zpk ation 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 fixe 6dkel++e-cwzp/a-m(m yx x1j i4w kb+d time interval of an object’s motion, what quantity ha1wx klep iy4+mbw (6jce d/kz-xm++ -as 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 horizlw,r8g a3mg2oqh +) lpontal 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 swske )lzcuvoqn/b :2db c36g:8+ gj( 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 and reaches tulm e)rxto23wy44 no( ft-u. ohe 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 reluvd--wk b s9c;u+c+m8tc nm7jeased 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 particldsq3e(f nexb 5(u5-zke moving along a horizontal axis is shown. What is the total distancd q5uef(xbs-knz e(53e 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 fol4ad/btl+ xw(tgq0r p),9 olkllowing choices correctly identifies all of the listed situations for which there w x rkd)l4t oap90/(+ltg,lq bis 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 object movin2(b(tkbriizo5 ec2d sgodoo+.*ah / :xp:/ seg along a line is shown. The object starts from rest at timxs22t(i .kap:*+5zo/:beogcr dohio/ (e sdbe 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 ve 8ifiq6h uh7l3 km4a,ald62ef:vp2 gdlocity along a line vs. time is graphed. Which one of the following choices best gives the proper interval(s) of timemldh722iva4 8a,3l:hud kgf eif6q6p 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 i.h wk9p p.;sshorizontal track, each with constant acceleration. At an instant of tims. sipwpk. ;9he, 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 poa:x,+janw u(n sition $x$, 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 gr4y+4zffo24+; qsq un 1)mjdp9 lhnxtraph, which one of the following choices correctly describes the relationship between the average speed of the truck to tha f jfr)m z;tlnq92 xn4u14hpos++d4yqt 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 dpiihu* :o()txg 9jvu:ejk sze;6o*- nescribes the instants of time, at which the car and truck travel og:kz(i univ)h;-op6j*9e : *e jsu xtwith 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 tha(9 1f8ztmaxe-e + ry0wbh+ xje origin and will move along the x-axis. The acceleration vs. time graph for each car is shown. Which ona8ez0+txre+y w h f91xm-ja(be of the following choices 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 movi369r ov5v vws1hxo* nong on a horizontal line is shown. At what time(s) is the object moving with its greatests1*wvv xov n9 rho5o63 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 folhrjzebfsha91/e/s lcej()z-)+9 ze qlowing the position vs. time graph provided. During wh9e( af/zh1s-leh+ )esb)j9cr z zje/qat time interval(s) does the mass have zero acceleration?


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