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



 作者: admin   总分: 72分  得分: _____________

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

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1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.10: A particle travels at a constant speed around a circular pathnthz9um mko*,p53 p 5f 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 withove .hni tg yf h++8us+1x+6xmhut reference to a particular directietivf+x+. s+y 6 hm+xhg18nhu on 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 az eehpq3sq b11rk k)-k.i-mi8 n average speed of 50 m/s and8.)sr p 1k1 q hi-mkeik3-qzeb 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 constant velocity. If it contv1ry92ik3ipess9: pd8 /qhu xinues, how far will it travel in 3. ev8usds y:p9x2i1rqp 3k/ h9i0 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 stationqm rvwdn86 )mmjumnjz080i98 ary 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 ai86v )zuw8 d0mqmn9j mrn 0jm8 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 400 km at 80 km/h and 400 k pf9k;08u ksgim at 100 km/h. What is the averf kisk8upg 90;age speed 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 ay meq.c.rb/i*(w ux1d toy car traveling along the x-axis. The graph shown below is a/yr . x*eb ciwm(q1.ud 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 thxs)7k l0 yf+krds00 sre motion of a toy car traveling along the x-axis. The graphsx)yr0 sk0r s0fdk l+7 shown below is a plot of the car’s velocity in the x direction, $v_x$ versus time $t$.What was the acceleration at 33 s?


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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  97.22: This question refers to the motion of a toy car traj/,n;cl mdg9u- c (igsszj,b 6veling along the x-axis. The graph shown below is a plot of the car’s jcj b(su6msn; dg i,-l9,/g czvelocity 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 velocity vs. time of a duck flying dum+v8b0tki q -s-cj z0xek*rd+e south for the winter. At what point did e +k8v jbt0 -0*dikcxsqm-r+zthe 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 btb88i.vvhav + elow which shows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. What was the average velocity of the car during the v.8v8ha +b vitthird 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 k,2tznf5ne. zbelow which shows the position and elapsed time of a car starting from rest and uniformly accelnknzfe.t 25, zerating 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 graph for an object with wc -w o5g-jdit 9,dpqyaq1 ve )f+)f7xthe position time graph shown in the diagram at rvqd9t) x,5-g+iedj7y1 wf-apqw o)f c ight?


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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 information. An id-d .l.nfmb lfa j 4y;m7xvbn9 :,2nskveal elastic rubber bvd-sb9;4lfm7 l.a:.xvf y,k nnmnj2ball is dropped from a height 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 the following information. l :e* +jyt6,o db/jdjdAn ideal elastic rubber ball is dropped from a height of about 2 meters, hi*dod,jel:d+jbt jy6 / ts 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 f o b09umr* t8exyc9i;with 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 follq( 4bp20t zg :wpvf8j8ouwll ,owing 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 te,h4ni z-dm(e;c44 vjqwl; siu k 9)clo 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 *pbqwus vdan6 *0::rym5g1pye 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 follow 1t/c ul.l ai .5t p/toz5wld9sz0x(tiing 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./o73fnu mrnuxw9zc 8, across a horizontal table top and off the table edge. Whz8wf.cu xru9mn/ 7o n3ich 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 rep+( zv-55ohzlqqwa0rh resents the relationship between distance and time for an object that is moving along a straight line. What is the insto 0lhwa-qqr(zzv5+h5 antaneous 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 dist2yykbr/ kjofe** p 91eance and time for an object that is moving along a straight line. Between what times did the object have po*/f2 * 9je1r ybeykka 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 inr-gau0ewm,98mn ihn)ch3;q ditial speed of 12.0 m/s from a position 10.0 m above the ground. Ignoring air resistance, the speed of the object when it reaches the ground 8)enhhc-d gn ;mmiw 30au,9qr 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 reprev2u/jy.m 2hg ksents a toy car starting from rest and uniformly accelerating across the floor. The time and distance traveled from the start are sh/v2mk2 .guhyjown 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 and unifoz; ;o f(*f7 azbr8rnczrmly accelerating across the floor. The f; r*b8zofan(z ;zr7c 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 j but /bk v8t+4cx1(5uro*ufmstarting from rest and uniformly accelerating across the floor. The time and dist8u1r 4u5kujc*b t/vtx ( fom+bance 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 acp x d.ax3qijv36,*+ sm)fjiy ccelerating ball. The position of the ball each second is indicatedjcs 6q) mfy3+vj i3d*x,.aipx .
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 978g.v*bl u2 ;d libygbs,qmg5mf8oh of the ball egb,s2 ;y.l *qbgu v9idob7h gflm5 m88ach second is 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 moving in a s 7 bx4 s +v0gxrsp,wnfi 9za.0og,fki-traight line is shown in ther v bpig7z4awf+os.0sf9 g x,0x,nik- 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 mov+ oqv35ahnexbic; 3t(ing in a straight line is shown in the5x +o3bc3iv( qnt;eah 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 freelsshb ;yua(m t3u*65,x -itzntg65yd dy in a vacuum near the surface of the earth

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33#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.11: The accompanying graph describes the motion of a maz:)0,ocevd,, kwco 19khv jwmrble on a table top for 10 seconds. For which time interval(s) did the marble),okz10 jcoeh:9cw,v wv md ,k 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 tabl pirwhq-- et.z6nx+4,h ogk,5s(t ogj+a1n hfe top for 10 seconds,hwho (irn jo -,14ze6tgq+anfgktx. ps+h-5. 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 d7mxyd0-1.1iuvm9jppy keb6q escribes the motion of a marble on a table top for 10 seconds. What is the marbles average acceleration between t = 3.3 s an -u 1 e76p .1yydkmi0jmqx9pbvd 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 uniformfm :dw.z7m7)ogyd u:gly 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 down m-5kro0ene( fvbtv ni-.o4z/,7ziq tward with a speed of $20.0\;m/s$, takes $2.00\;s$ to reach the ground below. From what height above the ground was the object thrown? Ignore air resistance.

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38#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  04.03: Which of the following graphs could correctly represent the motion2 yhqn/5isv7kd x6on * of an object moving with a constant speed6kh 5vsqxon2d *y/7 ni 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 accompanyi -vgtmm.1e ) p*iqo8hong graph describes the motion of a toy car across the floor for 10 seconds. What is the acceleratme1) toh*v-8 q.i pmogion of the toy car at t = 4 s?


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40#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.25:The accompanying graph describes the motion of a toy car acrossfo, /bcf l0kzk, 1bcayc183rj the floor for 10 seconds. What was the total displacement of the toy car for the entire 10 second interval shc8f yk1, 1 ba30l,or/bfckzjcown?


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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 acrosxl,d 8zk;vt7h,g, qlv s the floor for 10 seconds. At wl8gv ,lzk7vdq;th , ,xhat times or time intervals must the net force on the toy car be zero?


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42#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  16.03: A car accelerates uniformly from 0 km/hr to 60 km/hr inlliw30sv kh 24zd3,dr 4.50 s. Which one of the following choices best represents the accelerz,0h sd wk vdil4332lration 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. .dcjoll3z pzn9 g:(/wWhich of the following statementgl9(nc p:jo z 3zldw./s 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 47xllxg,d26pz/a g a ox2m7me.8 gwhx9s-szs time curve shown to the right. Whma7mg so ,x98zdz/apshx.76ls2-exwl4g x2 g en 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 ten kot(b ld*8v4qnis ball is moved so that the angle between the velocity and the acceleration (b ldoqkv 48*tof the 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 an*7n0hm qb 5lzdd traveling toward each other.nb0dqm* zl5 h7
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 po.r5f1xzc9y ep sitive and increasine f1yc59rxz.p g

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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 of1e,p rf upcpr1;/lw)-i4 kdab hc al;5 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 following choide;2zp0gvsueee- q42p :gk ,fces identifies quantities that must have the same directioupggze0,kfev ed-; :4q2e ps 2n?

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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 movkoxter(itxvs1yb9:ij/an)7 v b.) p9 es $3.0\;m$ to the North in 1 second. The car then moves at $9.0\;m/s$ due South for 2 seconds. What is the average speed of the car for this three second trip?

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51#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  07.05: The position-time, p( f4c7kn(gk 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 rightkzjftvop1d;t +.r u9: along a one-dimensional track for total time T in two p+1:ro ;jkpud fzt9 .vtarts.
• 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 p3ql ft/(2bljmj+q6vf fm+ n;track is shown in the diagram. The thick line represents the velocity. Assume that the car starlvqtlm3+q(2;n+f bjm /pfj f6ts 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.v28ki,pnnnl 62hdiemh 4a s 05 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 at0 ed54 ihnlam 2,n6sp vihk8n2 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 c3rjxw 2f,1gx motion of an object given by the position vs. time graph shown. ,xg rfxcw231j 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 object gb iis(n h2 /l+/oe/ipyiven by the velocity vs. time graph shown. For which time(s) is the acceleration of the object equ nhib/o/il+(2ps/ i eyal 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 9 k(hfr ;k3 q(vpzog22- n3q4snpxlwga fixed ti4r-k23k(zh nfvgq39spqxn ( 2gpw;olme interval 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 along a horizontal line with t 0b4kkp +tuxs6izv4b 5f,tw ll6d/ ,hincreasing 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 tfldzsf*jol, er/ 5p0: vk+gl)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 andz: fp- v.;:atvlrksf; /xcn4s 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 g7nxfq ;,pvxyh2t r pxo,he8v*fl3 8 (is 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 particle moving along a horizontal cbfbs 435suhkq2 (0c ymsu0 a2axis is shown. What is the total distance traveled by the partic 3 24skq(s5abb0f0uc 2um yschle 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 identifies adpk t28ml 2t z kz/nihxk;(;,pll of the listed situations for wh,lt ;mp2 i2zkpxnz (thd /8k;kich 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. time graph for an object moving along a line is sh4cm47lng6we( 726jwste juu,il2gfpytt6/z own. The object starts from rest at time2c zj le7 itnuw6e2ymw/ (7jug4,l gt6p4f6s t 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. timeax orr48tc+ mob./g 9n/r w9sb is graphed. Which one of the following choices best gives the proper n/b 8 sox94r.br/gc+m owt9ra 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 horizontal track, each with conx -3;: p2;lgubobg esrstant acceleration. At an instant of time, the information about: s;pg blx e-2ubgr3;o 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 posodz+fyd-6mq+ -4xgh jition $x$, 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 choivp+o90(4k,htsk,juzt h *czw ces correctly describes the relationship between the average speed of the truck to thatcj*zkowt4s, z0, 9(pk v+thhu 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 desco gsfm:sbwvq+4kw 377ribes the instants of time, at which the car and tru 3svsg7mw+wbo 7qk4f: ck travel with the same speed?

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70#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.30: Two cars P and Q, each start from rest at the origin and will move alegifw ,f4b (o,um:buv/8co +iong the x-axis. The acceleration vs. time graph for each car is shown. Which one of the following choices correctly identifies the relationship f giv f+iuw4/obe,:(u8 fbom,cor 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 moving on a ho0 (n;fnzb x:gd,z 7quurizontal line is shown. At what time(s) is the object moving with its greatest s uf0x:u;qg z,nb(z7 ndpeed?


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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-d2d69 z4vber .l y, 26vxqnodq/l5ryraxis following the position vs. time graph provided. During what time intlqr2 4b6 ,rvy2dyz.5lo /xrddqv96neerval(s) does the mass have zero acceleration?


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