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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 le9e60iea8 -9yva a4b5, bkit z7kjno a constant 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 pera.*cx,hlph s 4 unit time without reference to a particular directioncl*.shxhpa4 , 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 nmro-, /:syl2vn 1a qhat an average speed of 50 m/s and then completes a second lap at l1vrh-sq 2,nn ao/m :yan 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 s at the constant velocibep3gk*6zq;gzf 5kp 1 ty. If it continues, how far will it trave1gzez63*p pk;gkbq f5 l 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 stationarpf0 d5nq889o gb z tz6yraf(l.y on a 30-kg plank that is sliding at 5.00 m/s to the right across a frictionless pond. The boy then turns and starts walking on the plank at a rate of 4.00 m/s to the left, relative to the pb856gp0fdn9 z 8ly(fz taorq.lank. 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 vka gzu i slo 50ph)p2)/3tkl8km at 100 km/h. What is the average speed of the motorist on this trp5paz03otlvl2 u8gish)/k k)ip?

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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 ory .fl1x -v/faf a toy car traveling along the x-axis. The graph shown below is a plot of the car’s velocity in the x dirf .xa /v-1rflyection, $v_x$ 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 m.6 .;vny0,.dpnzbtr p lsp2bcotion of a toy car traveling along the x-axis. Th. rzlpypn06.vbd p nc ,s.bt;2e 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 motiu*tuf(mz* kr, on of a toy car traveling along the x-axis. The graph shown below is a plot of the car’s velocitu,f rkz*(*m uty 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 o+a ra+*y)1so0yik *,hxr iky sf the velocity vs. time of a duck flying due south for the winter. At +ai)ysh1sk*ik a *0x ,o +ryyrwhat 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 df6mp9wn8yry 5d k 7(zjiagram below which shows the position and elapsed time of a car starting from rest and unifdzm 5f 6yyrw 8k(jp9n7ormly 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 and 3hd/m d af81 kx*h:pcdelapsed time of a car starting from rest and uniformly accelerating in a straight line. The average accelera 3/ dcdh:h makfdp8x1*tion 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 fop ;j mv7 twi:yvx;u) *0;u:gydt3iugcr an object with the position time graph shown in the diagram yuj tgt: i;i d;;u3cxpvgy vmw:)7u*0at 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 :vgg84ko:chh s 7vkj,hdck* *to the following information. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the hd8v:c:scg ov* g4 khk7 ,kh*jfloor 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 g 7z +ukz3s)bn/e+jje following information. An ideal elastic rubber ball is dropped from a height of ab)ekn+ 7 gjz+eb3z /sjuout 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 wi(8kjxmwrrn/uwvg 4iw./t w* 1 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 following s,c ukq3af ,,l;hirjy* cenario: At $t_0$, two cars moving along a highway are side-by-side as they pass a third car stopped on the side of the road. At this moment the driver of the first car steps on the brakes while the driver of the stopped car begins to accelerate. The diagram below show the positions of each car for the next 5 seconds.
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 scenari y ayo6ps1zp,(;n(x*ufaz6flo: 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 followingfz9x 6n 2ucmlkow2; t8 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 ref6y9fmr4ge ;q0z ,g ,b0 i iz2tmvawwo5ers 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 ramp, across a horizontal toa)c1koww -;2 qayv z;able top and off theoo;wqa1 w)kacy;v2z- table edge. Which of 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 distance and time for an o4;ci5:rj;dqs h+ 8zd ny6tw bxbject that is moving along a straight line. What is the instantaneous speed of the object at t = 5.0 jdq y;h8 b cx4sri:nw+d;6 tz5seconds?


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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 distas-d0+)wywn1t ,qhomx w( x j/djek*5ance and time for an object that is moving along a straight line. Bed ehjo)s m atk ( dnww+*x-x/0y15q,jwtween 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 spf r1gn./s8 3tsi3 /cjj:murheeed of 12.0 m/s from a position 10.0 m above the ground. Ignoring air resistance, the speed of the object u/mg/3f. jn8r ihs r s1jc3et: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 stwgq+a 7:tbruy je:5h 1arting from rest and uniformly accelerating across the floor. The time and dist 7wa:1uyg + bhqejr:5tance 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 below represents a toy s 6 ni-scu)hf)car starting from rest and uniformly accelerating across the floor. The time and distance trhni) fc)-ssu6aveled 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 andrq 1ezu y(xw(0.lo8u t uniformly accelerating across the floor. The time and distance traveled from the start au(yu xt(o .z le0r18wqre 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 accelse43 q0d z4j0r6ss gsq -eqhg+erating ball. The position of the ball -s+g4ser e0qjg4 6 q0s3sqhz deach 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 shtwz,hvi-1+( ppqh -nt ows a uniformly accelerating ball. The position of the ball each second ishz(+ -- wvni htpqt,1p indicated.
Which of the following is closest to the acceleration of the ball?


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30#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.17: The motion of a circus clown on a unicycle movijyk:ol, ;9 oqing in a straight line is sh ,oiok;:jq yl9own 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 moving in a straight linm*xryqzxs rg h, +8e +5s,en3be is shown in the graph ey8r,r +5hs3xnsxgqb + zem*,below.
After 12 seconds, how far is the clown from her original starting point?


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32#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.04: When an object falls freely in a vacuum near the surface of the e hy+gr 0xkp 4kc8v-r/jarth

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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 ao1krz9jt - k l5h.t(xc marble on a table top for 10 seconds. For which time interval(s) did the marble have a negative c1t-j9kh.ro(tl z5x k 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 moie secv fb(ao/n79) 4ition of a marble on a table top for 10 seconds. For which time interval(s) did the marble have a positive acceleration? eioi/a4n9 7( scb)e fv


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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 describ avolr -8ha:5rj6-bj i-jka 5ves the motion of a marble on a table top for 10 seconds. What is the marbleska5- oria--ljv86rj 5 vj ah:b 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 fyqbo2m4(kn 7xor 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 with a speed9x w-vtqos za.xmq)1f12ty*b6 kj3 kp 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 foq 2kaxx/1mu( o*sp 7qb+k u+iyllowing graphs could correctly represent the motion of an object moving with a constant speed in a str um2bu kxix o 7(qsa+1yk+pq*/aight 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 geqn , oo5-5,;fn) xnljnzhd8k raph describes the motion of a toy car across the floor for 10 seconds. What is the acceleration ofdkz j -l )hne;5,noq5,nfo xn8 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 describ5iyh7ct-iyaljrdu7 4 y 3/ddyez-:f;6yr i x)es the motion of a toy car across the floor for 10 seconds. What was the total displacementf5za7xy) ci6e7yij4 yih:ldt-y 3 ;udrr-y d / of the toy car for the entire 10 second interval shown?


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41#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.26:The accompanying graph describes the motion of a toy car across thecu -+ 8..a2kn zny l-bkkvguc/ floor for 10 seconds. At what times or time inte+ /.ukgv -k8l2ukabzc.-yc nnrvals 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 6m9r 9h8j/q2hi467r gj ljx yqd0 km/hr in 4.50 s. Which one of the 2hrjg9976jjh 4rix dqm/q8lyfollowing 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 showg9yiiqtv5p * (fq)fswz3:9)7 secgy jn. Which of the following statemepq :tf)59 7zc)*qgi9jeivgs(f3wy ysnts 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 velocity versus ti9j2)( on. 7amrwrwjiume curve shown to the right. When does the car have zero ac.j9 o r(wwmnu ji27ar)celeration?


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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,w7luyy +q ,zy is moved so that the angle between the velocity and the acceleration of the ball is kept at a constant 120 degree. Which statement is true about the tennis ball, y+ly,7y quzw 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 150j cwg*1bw.y0 m kilometers apart and traveling toward each other.b m.g *j01ycww
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 acceleratiov d.l7/m-stg xn is positive and increasingm. svx-/d7l tg

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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 velocittmo9;l vr(udfp(r 5 ,hy 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 qu (30tqifly6, which one of the following choices identifie3qti uyl0(6qf s quantities that must have 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 move,h j3m-)bfls ys $3.0\;m$ 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-timf gin9 p0soa,1pqaqays8:0r*1ubwe-e, $y\;vs\;t$, graph for the motion of an object is shown. What would be a reasonable equation for the acceleration that would account for this motion?


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52#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  09.31: A car moves to the right along a one-dimensional track for totalgb+ixr t1. xky 3vp3n3 time T in two3+xki y rp.b gv3txn13 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.c/ erxrama p;d8s: v48 time graph for the motion of a car on a straight track is shown in the diagram. The thick line represents the velocity. Assume that the car starts at origin :r m; 8cpa4/exa 8dvrs$x=0$. 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 l+t 1t ;ae-sc3w o-s/lfb2vik the motion of a car on a straight track is shown ;s-t-fbis2tk3l / w 1e+laocvin 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 motion of ai( qpd0tp baaj32)kx4n object given by the position vs. time graph showx)qppad ia4(b 0j3k 2tn. For what time(s) is the speed of the object greatest?


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56#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.11: Consider the motion of an 5o3yje o0fnelz2 l)y8 object given by the velocity vs. time graph shown. For which time(s) is the acceler2e jo yn5 ofl80z3yle)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 accetxv 5 g)6h1toxleration vs. time graph for a fixed time interval of an object’s motion, what qutt)x ho 1vxg56antity 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 line with increasing speed:2 ag:n4; quomvt1 vgy.
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 t uk6n)l3*xtcmsh zco ;,,jau, wo 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 the ground gfy76o i,wk/ (k9 lgr4uaengs .g: ;emin a time of $2.50\;s$. Neglect air resistance. With what speed does the object reach the ground?

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61#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.03:A small object is released from rest and reaches the ground in a time 1f 4yjpifx 5 3zp)s:xj4cp;ltky 3xw0rx6e* e 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 particle moving along a horizontal axi.o,y akm cze ds7)v)p*s is shown. What is the *.co,)yd)pzvae km7s 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 identifibn00x5:a g3)kutq cco es all of the listed situations fotc) 0kc3a5qo: g0nxu br which there is a non-zero acceleration?
Situation I : A point object moves in a straight line with increasing speed.
Situation II : A point object moves in a circular path with constant speed.
Situation III: A point objects moves in a circular path with decreasing speed.

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64#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.32: An acceleration vs. timyn+; -t*f h zaz2d)gffe graph for an object moving along a line is shown. The objeyfn;*2zhdt+zfa g )f-ct starts 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. timg2z .zr* -tzn fajd-7ce is graphed. Which one of the following choices best gives the proper interval(s) of time for which th r.7-jz ncz2dfaz t*-ge 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,a ; akp:eyy-3p each with constant acceleration. At an instant of time, the information about the cars3apap- e;y :ky 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 zognp -;b /(v0a;vncx )vv27pihxv e) a 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 t2qbue f/(bpx,6p f0gtime shown in the graph, which one of the following choices correctly describes the relatioq/6b0tp( fbxpg e2,uf nship 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 chn yzcr mu+ak/r74o6,2 zv-pkm v50bovoices best describes the instants of time, at which the car and truck travel wit-+6vrzak vzn7ck5oo my ,vbmr2p/u 40h 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 t5vw rq; i7pu6the origin and will move along the x-axis. The acceleration5uq6pv 7i;wrt vs. time graph for each car is shown. Which one 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 t29b4 s ysbi-jes,vc5 object moving on a horizontal line is shown. At what time(s) is the object moving with its greatest spests bebv c9 j2y4i,-5sed?


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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 positioayf2:pc r9x-pog4y o(g (/cbdn vs. time graph provided. During what time integ9p4-o: cab /2y(fd(gcypxrorval(s) does the mass have zero acceleration?


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