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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 constant5)58a5 c jx0jykvufs1i vkq 742mhhty speed around a circular path of radius $R$, if the particle makes one complete trip around the entire circle, what is the magnitude of the displacement for this trip?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.01: The change of distance per unit time without reference to a particular n3gkyk+5ce ikos y bd 5ur:2.3direction iskiby s5y.oc3 5n2 ue+kd3gkr: 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 6kb7lmjbhd3; ;/lng xan average speed of 50 m/s and then completes a sel;;dknjlb/3b6h7 xg mcond 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 s at the constanpc5a7cs; zzfwmede lh;9)k )5t velocity. If it continues, how far z h));kd 5wecl59az;esp mc7fwill 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 sn8het4eg/+s:s7y8rkbqov v- liding at 5.00 m/s to the right acrosg88hs7 v+t: vn eb-oe/sr4kyq s 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 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 4b7yl:9h2r s vwji5u; m00 km at 80 km/h and 400 km at 100 km/h. What is the average speed of the motorist on thims:ubhrijy; w79v 5l 2s trip?

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7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  97.20: This question refers to the motion of a toy car traveling along the x-a00r,xvb dp/hn.3m7 jvh 3) qxkaab 9cjr6xb6 axis. The qj3b3v va,k6xrn) db0mj 67/ .9 a 0xxrhbapchgraph shown below 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 c;bc d-;z -ilcrw-pg :along the x-axis. The gra-ib:pl; -wc drzgc-;cph 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 motioyx. 87w2 x uv+lz*s.xcbpg*cen of a toy car traveling along the x-axis. The gr.ew .cvb sx+8xgz2l cup *y7*xaph 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 q71 br/nw,n 8yz+ck*d m8qim fvelocity vs. time of a duck flying due south for the winter. At what po,cq8 7mz8mibnwn q+ / kdrfy1*int 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 whi3r2eko5zb d pyum(l6:ch shows the position and elapsed time of a car starting from rest and kd(r 6el32ypo m:5buzuniformly 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 belowg2ti lkgns5af1m3.vw 9w90pkpu 75 vo which shows the position and elapsed time of a car starting from rest and unifor0vui9 s 7.w fnktpa1g om55vwl2gk93pmly accelerating in a 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 grap8t do 1(v duqa2pg.j4s8v 3bmj3q8qg vh for an object with the positionov mqg2dpjt3s8vg8d8vuq4 1a(.3bq j 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 informati/n(i5ao +4vk zv0tavh j:nxx4on. An ideal elastic rubber ball is dropped from a heightvh 0(vz xv5 4xo:/jn+4anktia of about 2 meters, hits the floor and rebounds to its original height.
Which of the following graphs would best represent the distance above the floor versus time for the above bouncing ball?


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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  00.29: The following question refer to thq+u/af3oqu 8 0n wdu8be following information. An ideal elastic rubber ball is dropped from a height of about 2 metersb+ua 0udw3qunq8o 8 /f, 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 with a spec1 oj k q0jnvqzvr) 5.99ribe1ed 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 refersuuy4 8if6azd+)vk g/+uav ny * 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.
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 scenariwr:io wi((*yq/c ;vfuo: 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 scenario: Ata ftaivq*)r(px;c*g ux fq3*: $t_0$, 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 the0rv:7xxaxa b u31bp 8z 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, acrossn)gmabz5q 6+ o a horizontal table top and off the table edge. o5+ z6amg nb)qWhich 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 distances(v ygrzj;f xx.:sj-8 and time for an object that is movxr. j zj:(g-x yv8f;ssing 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 distance and time fo3+wyojhn iliz)9h2 tuz-5o7 er an object that is moving along a straight line. Betww 97zlz ith5o-jeoyh)3ui2n+een 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)w3vb c wyvh;: an initial speed of 12.0 m/s from a position 10.0 m above the ground. Ignorvw)v;y hw 3b:cing 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 a toy car starti,z.nre )ppw n: d9cw;w,i phx0ng from rest and uniformly accelerating across the floor. The time and distance traveled from rxp9e ,ww n.nw;0ihc):pd, zpthe 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 car start/kw(yvob y g3mu)k :v8ing from rest and uniformly accelerating across 3yyvk 8w)g k(:buov/mthe floor. The time and distance traveled from the start are shown in the diagram.
What was the acceleration of the cart during the first 0.4 seconds?


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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.13: The diagram below represents a toy car starting from rest /m)gnl itkv5y8o,5fc e w1b;y and uniformly accelerating across the floor. The time and disb;n,f/5im )v cyl1o 5t gykw8etance traveled 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 accelerating ball. The posvgx0) vkrqr52q )ub (rition of the ball each second is indicrqgk u2v5()rrbx0)vq ated.
What is the average speed of the ball between 3 and 4 seconds?


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29#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  04.09: The diagram shows a uniformly accelerating ball. The position of the uvq2(acipz bh+wv094 ball each second is indicaczauhwq p(+40v2ivb9ted.
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 gh-d krm-+-6fy xm8/ubo+a sk a unicycle moving in a straight line is shmkumy bkhd+fg6rs+/8ox--a -own 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 ci)8)r;h ;k+ bs c7pwchn.-sopkchjo 9nrcus clown on a unicycle moving in a straight line is shown in the graph below.9h ok ;.sh; snwj) r-knocpch7+bp)8c
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 f 0 dwr0s(khw *f:jonk1alls 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 accompanyingemjny ;//og )ut1 n8kf graph describes the motion of a marble on a table top for 10 seconds. For whiy;nfo gknje/m1t /8u) ch 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 dcqr k 8,0 w5eg(m7hmxzz)q c:fescribes the motion of a marble on a table top for 1r ,qc5 gkf8z xw 0chez(m)m7:q0 seconds. 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 xn5 qmgx00 )vsq5+b2njq+pu;vcv ls: motion of a marble on a table top for 10 seconds. What is the marbles average acceleratioplgbs0xqcvuqm)+02v:q 5j 5;n+ s xvnn 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 acceleratesv *q -9uba 4 s6+j2hm8gc hiyv vecxz0vj0r+h5 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 straivioidjq/h, u 3t6 w:)cght 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 corr3harw q)m fzk 7.ra:up1 +wfb.1pf+oiectly represent the motion of an object moving with a constant speed in a st:u.o7a1q+3bwrp zw frf )kfhpm+a i 1.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 moti t6t jnx 4yhd 2y/)2ac8rl7beyon of a toy car across the floor for 10 secondse)c/8y26lttyyn 27rjxb hd 4a. What is 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 de7 j347ab zxn8htn w0lnscribes the motion of a toy car across the floor for 10 seconds. What was the total displacement of the toy canz7x4hnat3 bln 87j 0wr 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 ox ,hcxm3 un98 v6z52 were/ffgf a toy car across the floor for 10 seconds. At what times or time intervals must thenvx3r 8e gchf2x,e5 /mu9fzw6 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 4+z :uw)neuv win 4.50 s. Which one of the followi+wuwe v:4)nuzng 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 6lrr-mos *2 b00 jampfrziy, *of the following styfr l*,m0p62*-zsmb rj 0oira atements 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 time jh2 vx:j9v6;jnkvj j.2rl+ zzcurve +9x jzr;vnjj:hv kl 22vj .jz6shown 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 ball is moved so thnaw2m gr-wuw;yi,.d h-f/l( xat the angle between the velocity and the acceleration of the ball is;u rm-lwxdf- wy i (g.h2,wn/a 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 dur3gost2- x .each other.ur23 d xs-t.go
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 and inc7fh3mj+wf5 ymrjhyf 7m3+wfm 5easing

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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 vel2c,xf pd :3bi w/dxzf3ocity 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 oxw) -,lj*vx ejf the following choices identifies quantities that must have the same di,x wlxj*v)j e-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 move)3g62s: k.w7hiw o -nqt ohum;fwqas(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-timi ,nyz pp k6.a:2xia0ve, $y\;vs\;t$, 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 ton4 htisfb3s6+(s u,uh .lu/2rqqzj2etal time T in two p 2l/u eq+ u(6bhi 4nsrj3ft shqzs.,2uarts.
• 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 ooy/3f- 0jvi5,vvw4ve .x mj kjn a straight track is shownyv3jv5jewjomx.k/4fiv 0,-v in the 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 sj;:ppc4u; sjgia.u2the motion of a car on a straight track is shown in the diagram 4.p:sajup;isg 2jcu;. 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 an4zvqjkwqx c43 jsmle clr g8;j/.;z.* object given by the position vs. time graph shown. For what time(s) is thejlc;g;cqmwlkj. x. z*4/sjz4 8 e3rqv 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 given by the vep 8lfbv 9t a5j)rmpgfwtx+43 9locity vs. time graph shown. For which time(s) is the acceleration of the objeca 9tj4w9fm+ p lf )xgp8tr5b3vt 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 acceleratio6of9a4hxy1 weu5(, zmwukmi:n vs. time graph for a fixed time int5w694k:,zfm m1eui o(x hya wuerval of an object’s motion, what quantity has been determined for that object?

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58#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  11.08: An object moves alog ugm kfv cv :w*2+4l30dectc0ng 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 trr 00 nrt2+hvnzip 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/2gfc u n 6hm3z2w.qzq from rest and reaches the ground in a time of $2.50\;s$. Neglect air resistance. With what speed does the object reach the ground?

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61#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.03:A small object is 3tnqlubx 0 0 tf+9j,q-0wkghi 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 particls s4qc.v5:i/)zu;ao8 gbckmez-ed6bhp: 0 xde moving along a horizontal axis is shown. What is the total distance trave/i:z g 5dp6b.8 sk4 -)0bav:;sohcueqc emxdz led 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 idel001xq/hmqg. kfxnssg h+q8 t );: vbdntifies all of the listed situations for which there is a non-zero accehghqvsx) g x. 0/ q81m+:b t;qs0ldnfkleration?
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 moving5/ vk)joft.ma along a line is shown. The object starf5voa .m/t) kjts 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 andc6, /+l54vr s vesgpnc its velocity along a line vs. time is graphed. Which one of the following choices best gives the proper interval(s) of time for which ve 64gn r,5cs+v/sclp the object is moving away from the origin?


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66#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.09: Two cars are moving to the right on a horizontal track, each wid0n3lys v+xvj5j i4c 9th constant acceleration. At an instavv+n sdylc05 ix94j j3nt 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 a positoj6+-:zsdv ye4pyvnl) 0m k.z ion $x$, 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 cupjd w4kx3.jdm+smcv*6i 3(w hoices correctly describes the relationship between the average speed ofd m jj4vcdwsw6*m(3u3 i.kpx+ 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 fl(h*u7ik g21+dd/cjr;ak (zlwd llt8 ollowing choices best describes the instants of time, at which the car and truck dw8z t+kru2* c;/(g(lh d a1dl7kl jiltravel 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 will move lwki,xlh)7y4jge ,o/ along the x-axis. The acceleration vs. time graph for each carygk 7)xj eo/,l4ilw,h 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 gra5 lrqn0 k oa* ee;7kbu;p/)vuoph of an object moving on a horizontal line is shown. At what time(s) is the object moving wit7k0qulu;va ko o*5pee/ b);r nh its greatest speed?


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72#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.08: A mass moves along the x-axis following the position vs. t ,4t vh5h5uhdxime graph provided. Duringh5x5, v4t duhh what time interval(s) does the mass have zero acceleration?


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