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习题练习:Physics Bowl by Topic 2: Kinematics - part I General Motion

 作者: admin   总分: 72分  得分: _____________

答题人: 游客未登录  开始时间: 24年03月31日 09:50  切换到: 整卷模式

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1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.10: A particle travels at a constant speed around a circular path o/ve+66jg1sxqi) 1g(ie1l r i e.gnjalf 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 u ia,2--esa fnkl:hb,irqsx7 ,nit time without reference to a particular directiof:rk a ,2,-,ixnsbs7e al-hqi 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 xq+dd xeal*6p85.wen circular track at an average speed of 6 l+p8a5d*.edwxneq x 50 m/s and then completes a second lap at an average speed of $V$. The average speed of the vehicle for the completion of both laps was 80 m/s. What was the average speed $V$ of the second lap?

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  95.03: A toy car moves 0.80 m in 1.0 s at the c .q p3zh;;g:ei0oqik 2tqdgm9onstant velocity. If it continues, how2gotmpzdhq 0 q e:;i.qk;3ig 9 far will it travel in 3.0 s?

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5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  05.34: A 40-kg boy is stationyvw)* ;3d hshr 3h22 s:w o8nhtd.pwnyary 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 t:)wtn h3ond8yssphh *vw.r;2wy 2d 3hhe 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 400 km at 80 km/h and 400 km at 100 km/h. Whatm5j *la wyg7t,w9pdt2 is the average speed ofg,a9 pw yd25j7 mwtl*t 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 traveling along the x-arh:o6s 9)khfen(lhfsj2 ii2+ xis. The graph shown below is a pl62h9kef sjh + 2 f)orihnsi(:lot 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 ref yezu ryj1-c:uhh2:)le . mu0oers to the motion of a toy car traveling along the x-axis. The graph shown below is a plot of the car’s velocity in the x direction, h 2uuhyce -:om.el )z 0:urjy1$v_x$ 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 m t3ie :ah99fwthe motion of a toy car traveling along the x-axis. The graph shown below is a plot of the car’s velocity in thwe9 9if3 :tahme 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. time of a duck flying due south fod(uojl:jo83dj o,js +r the winter. At what point did the duck stooj,o+j(dj3jd ol:8 u sp 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 belonrr;vessa/w + i 6/1xqw which shows the position and elapsed time of a car starting from rest and uniformly acceleratse1sq rnr+iav//;6 wx ing 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 beuz:ph/32c* c vmsau0tlow which shows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. The average acce0mvp 3*haus2zcuc: /t leration 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 for an object witkpn))nv t6 j3-jd) oxkh the position vk))-dntkx 6pon3 j) jtime 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 followin64b6ac 0smib wg information. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor and rebounds to its oram04c6 ws6bb iiginal 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 rf/; 0hal6p fyu-l)b ran3w/4v q kk gzp,/rn0zefer to the following information. An ideal elastic rubber ball is dropped from ;- 0p)4r ,n/p//b zfzlw0nlkukgyrf aa36 qhva height of 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 wtl/) dc 1xxp;nith 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 followinf 7wtdxph1,fimy(1 m*xp 8;nkg 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 sc hu)wauqo9b+4,j 8p ns( fbcn: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.
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 scenarirgc8+ -wj 8z k5y4vcsoo: 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 9hc(bbl (t2y 2vj oh7sfollowing 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 hormiwv43 vwav u)2il :+fizontal table top and off the table edge. Which of the following would best represent a graph o4:u)l2vvw+ vii awf 3mf 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 up5o.hi )*uv s+.resp6qdaz ; relationship between distance and time for an object that is moving aloi*6h;pzs a.s+ve5uru.) p qdong 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 for an ob(8* vvp kk6ctaject that is moving along a straight line. Between what timeskvk6tvcp 8a(* 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 o9 ukcxu r-*a:k;1uckcn Earth with an initial speed of 12.0 m/s from a position 10.0 m above the grokku9ru x1;:* c-ucakcund. 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 a toy car starting :(vgjkt -7k7 egdai 9sfrom rest and uniformly accelerating across the floor. The tsev7gi da9t(7-:k gk jime 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 below represents a toy car starting from rest an- ab-qqjx0.h nd uniformly accelerating across the floor. The time and distance traveleqj0nh- b.-qa xd 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 startf1cy uc)e1i(9e kwki2 ing from rest and uniformly accelee w(i y u)f2c9i11eckkrating across the floor. The time and distance 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. Ta .4z 1m;llecjoi.2yf he position of the ball each se.y;m1 l ojeal 2ic.zf4cond is indicated.
What is the average speed of the ball between 3 and 4 seconds?


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29#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  04.09: The diagram shows a unifoedoqd *7+ckniyppx..f*6m+ c( ird5jrmly accelerating ball. The position of the ball each second i m5c7r.+pdni.*+ p jyc e6f(qdo i*xdks 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 l fy99k73. 5ok5vm +s jxmyv5lr7th roa circus clown on a unicycle moving in a straight line is shown in the graph5j mvl5fy.9 lyv o3s +moxk75k r79thr 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 st.i1ylj*hs. (mcvsc e (kk p)-lraight line is shown in j ik k( hs)lcs(ye.v1c.m* -plthe graph below.
After 12 seconds, how far is the clown from her original starting point?


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32#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.04: When an object falls freely in a vacuqt .okop2 vuaky+9l8)um 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 accompanyicl-y; aik o86gng graph describes the motion of a marble on a table top for 10 seconds. For which time interval(s) did the mao8kly6-i c ;agrble 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 marb* enzy:89mggawch 7cpf4k)eaz/ +0k dbr8k 5dle on a table top for 10 seconds. For which time intervald k b4)neear 58c:c /07+mka8kzgypd9*gw hzf(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 b (c 8nqf wd5a f4*+ea)i4cbjithe motion of a marble on a table top for 10 seconds. What is the marbles average acceleration between t = 3.3 s and t48j(nai5 q f+4)accb eif*b dw = 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 uniforml.jdsf qpwh68b0znx 8f 7 y8q,iy 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 downrxr4a s0712s.n yz cksward 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 folld wm m: ,5h/yoha ,vd(y0jiak,owing graphs could correctly represent the motion of an object moving with a constant m:owa0kj,,/5 hamyhvd(yid, 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 carlxfj zb oj+r)r6t-o 8( across the floor for 10 seconds. What r z8(b fto+xo j)r-lj6is 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 ttx3wto ;m p: mi60z:kdhe motion of a toy car across the floor for 10 seconds. What was the total displacement of the toy car fop:x omkti:;dz0w6mt 3r 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 ofihsoyh 8z:0us8.,j iuub8 7i s a toy car across the floor for 10 seconds. At what times ossuihhu8 :s 8yb8ou0 7j,.ziir 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.z 6k6t:k sf9b f-fvn.j o2v-we50 s. Which one of the following choices best represents the acce9 enjfzosbf.t:v-k w26k6v- f leration 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 timfr l a3w8 c9j/kq l7ell,i5jo4i0)w s;ta b/roe curve shown. Which of the following statements regarding its motio4l38 5c 0,fi7 easw kl/ trjwj)oq liobal/9;rn 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 cuzquaoxs15tx 4s;b z 1u(t ws72:cah,wrve shown to the right. When does the car have zero acceleratiozushs7 oxtztq 5wx,c 2as:(;wa1b14u n?


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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 modsu;2nt vn.a1x0v /rni h+mt;ved 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 d2n;.tv n/ n;i1tsv +xmuar h0ball 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 apartt3wz)j 1xkc(r and traveling toward each other. z1twc (r3j)kx
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 is4q3ruoyn/84.n:dht cq6uh lwwrcwp f8 o6r80 positive and inc6r46q qrw0 phu:cr4 n 88u3lwnoyh8dtfw. o /creasing

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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 oo+1m:gcm vef .f average velocity is

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49#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  16.18: For any motion in two dimensions, which one of the fl wuqunt-1a+e205nq bx/hyx,ko7s/m ollowing choices identifies quantiti 7an2/,/ tbql-+xnekuys5muh1ox0 w qes 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 moves5*g*vwjo l* km $3.0\;m$ 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-tiyg2s)4 l:boedksj i nw(j f79)ux8 k.tme, $y\;vs\;t$, 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 totalhlq-vbl*z1mup;p l5s36 sq (b time T in two par* zl q -3pluqlbhsbms1( 5p6v;ts.
• 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 straighwv2xo2i j *)uht track is shown in the dii hwx2)j2uvo *agram. The thick line represents the velocity. Assume that the car starts at origin $x=0$. At which time is the car the greatest distance from the origin?


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54#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  08.24: The velocity vs. time graph for the motion of a car on a stv .uk*hwi6fs l sb0:-mraight track is sho sl.i*hkub s m-:0vf6wwn in 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 an object giv))gbv0 qv:lc;ph0xkkk y ,li*en by the position vs. time graph shown. For what time(s) is the speed of the object gr p,q;* 0cv: bllkk0)hxk)yg iveatest?


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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 objecttf v;din) /2ho given by the velocity vs. time graph shown. For which /t2hivo);dnf time(s) is the acceleration of the object equal to 0?


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57#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.24: By computing the area under the accelem8rs27vanpm9 (fd 8c ssptj8 3ration vs. time graph for a fixed time interval o892a8d sstm(7mps8 3 jfnvrpcf 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 alongioln do17*z:k 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 tri yk bz:i6*jm4ozwr)ia*f 1gk/ p 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 releasef1u .( /irtjokcz* qu:d 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 released fras-ep 8(q, +jqmuo. cfom 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 particle moving along a horizontal axis imexd)t r;7,tis shown. What is the total distance traveled by the particle r ,emi dt;x7t)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 identifie9e ;xji edv+7ys all of the listed situations7v9xiee y +d;j for 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 accelerati+d7vf srf e*)pon vs. time graph for an object moving along a line is shown. The object starts from rest at time t=0 s. At what time(s) does the object attain a maximum displacementvf7 f+rs) e*pd 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 alo,*r3c)ug up pmng a line vs. time is graphed. Which one of thecup, mu p*rg3) following 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 horiag-n)g30ur ibec z5 2yzontal track, each with constant acceleration. At an instant of time, the information ai0u ey g)rgb23azcn5-bout 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 pos)zuidc.pg0e r04r ;jwition $x$, 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,n l:b 3x52nsju which one of the following choices correctly describes the rel2 sblu:n3nj 5xationship 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 d9. gnu qxxz44describes the instants of time, at which the car and truck travel with the ug4xq n.dzx94 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 ohtz6r/13ay y msvi6i*w-bhmo2f)-0lr hfad7 rigin and will move along the x-axis. The acceleration vs. time graph for each car y-yimh frob6* fvh13d2 arsi06 a-t 7lmh)zw /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 ob: 42q:hlzr 7dplj(nurject moving on a horizontal line is shown. At what time(s) is the object moving with its greazlr4u:(d h27 nlrjp: qtest 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 pok6v eues oe/52sition vs. time graph provided. During what time2 uo es/ev56ke interval(s) does the mass have zero acceleration?


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