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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 path of radius d bx66he;*h+ h,x k2j;nlmvdiprs+q($R$, 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 distance9y g k. (pd0cy-zvz5cq9kl,fg*w nu/r per unit time without reference to a particular direction iscz y,9q f9cd.wkgkg0 r y(- v5nzu/*pl 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 onebp( fhk+7v+0/8 ;lmwxc revnu jvc84 t lap around a circular track at an average speed of 50 m/s antck l v er+mvf p74+0/(;uvch8jwxnb8 d 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 cos((6yx)+esd2 j vmyonstant velocity. If it continues, how far will i (excm( )js +2yv6oydst 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 epijr d,qp : z5y)(o1tstationary 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 startsq5tey)id,zj1 ro: (pp 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 travla40 ;fthbli:2visc7 els 400 km at 80 km/h and 400 km at 100 km/h. What is the average speed of the motorl7l ;0iica4f:hb2tv sist 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 jfyisj my)4k5 vgq2h6l (c3l1toy car traveling along the x-axis. The graph shown below is a plot of the car’s velofc (1 y3lig5qyvjk h2l mj)64scity in the x direction, $v_x$ versus time $t$.
During what time interval was the car moving towards its initial position at constant velocity?


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8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  97.21: This question refers to the motion of a toy car traveling along the x-axi9ymj5,lv+z7x wxp h ed +otr)8s. The graph shown below is a plot of the car’s velocity in the x dirmr9x dvjxz e ply8 ,+t)7wo5+hection, $v_x$ versus time $t$.What was the acceleration at 33 s?


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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  97.22: This question refers to the motion of a toy car traveling along tuuc+hh *:cet 4he x-axis. The graph shc*h ce:tu+h u4own 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 velocity vs. time of a duck flyinfdre7oje/mf88w)f f5 x;)oqig due south for the winter. At what point did the duck stop its forward j o fo)fe85ef i7/q)x;rfdm8 wmotion?





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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 -d:2fo rwk3yu refer to the diagram below 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 f:ky udrw-32othe 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 diag zgml unxdl)ah3 ,+p1k(ok-n)qca +(aram below which shows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. The average ac l) ag1(xk+aa,dk+c-l (ozu)3mn pqhnceleration 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 v/2ockfqw qa6) 2eyj+hfxgvk4 f/h8 i1elocity time graph for an object with the position time graph show/iwkkxe42 fhg+qhyq cf8 a)f 2o 1/6jvn 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 information. An ideal elast0 q j2pgeis *5pnd64cwic rubber ball is dropped from a height of about 2 meters, hs nc6iw54jp2qepg0 *dits 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 rj:l/1e,r nhid s;4rjaq0v u :vefer to the following information. An ideal elastic r e:;j,q 0av rsi:jnu1l4dh vr/ubber ball is dropped from a 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 with a speed o2-h9 qvsi t80fhq tgg-f $v$ 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 follow3e 5 djap3j go9-ren:1-ao;1foef jkd ing 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 refe62/ 0l f33*hokjg sszgq)d jwwrs to the following scenario: At $t_0$, two cars moving along a highway are side-by-side as they pass a third car stopped on the side of the road. At this moment the driver of the first car steps on the brakes while the driver of the stopped car begins to accelerate. The diagram below show the positions of each car for the next 5 seconds.
About what position after $t_0$ would car #1 and car #2 have been side by side?


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19#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.03: The question refers to the following- y-bmi58l;;qxzc8 xx,chysc 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 bv5j foe;i,/ 7ul 3g)b0c avk) kwe4zqrefers 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 ru/-- baukurfd 3s6e2 gamp, across a horizontal table top and off the table edge. Which of the following would best represen2u fb6g- ruaus-ek 3/dt 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 repres0frrgq2 s4) yz:vjwal ) rl7*cents the relationship between distance and time for an object that is moving along a straight line. What is th*))q2 v0 gzral7 :lcfyr rs4wje 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 die r e8:-uetjg;8 cyg-xstance and time for an object that is moving along a straight line. Between what timc u egt:-eerjxg ;88-yes 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 iut4i d 6b cnc(/z.i n+lcl/sw5s thrown straight downward on Earth with an initial speed of 12.0 m/s from aclt(u/ 6csdc5 4i.wn+/ n zlbi position 10.0 m above the ground. 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 from rest and uniformlz3kj s9w+r n1ty accelerating across the floor. The time and distance traveled from the start wn+r9 zjs3tk1 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 belpf 80o0kae k5uow represents a toy car starting from rest and uniformly accelerating acros0pkok ae80uf5 s the 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 represe qnyfp,nukid5m8q b7 3kz i;.7nts a toy car starting from rest and uniformly accelerating across the floor. The time and distance traveled from the start are shown in the diagram. z, iy q;5md 7pf8u7nn ib.3kkq
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 acceleraczfjv0k7w af-7rcv )8ting ball. The position of the ball each ) fvaz-rc kcf8v7j7 w0second 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 uniformly 2z v fl(euf42jkbs4h8 accelerating ball. The position of the ball each second ij 24z4k8hbe2f us(f lvs 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 qgulkuv7 3x1g+ ysu k9r*.ob:unicycle moving in a straight line is shown in the gray.o3uusr vqbkx +u lg7g1*k:9ph 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 uni, e4oc i;gmb :z7c532mm lyepocycle moving in a straight line is shown in the graph belo;ocg,5 epb:yzmemc74mi32 low.
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 eari pmm 28(*qp gve,l)osth

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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 mot8jm ( ja2ak.;)twwkwx p;jaf2acvx2+ 3rkmp)ion of a marble on a table top for 10 seconds. For which time intwj(fk jm)wm;3+jaa)kawcr2x tpk.;a28 vp2xerval(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 describesgmt 65 e0vkuf0-nx( :swpc-oa the motion of a marble on a table top for 10 seconds. For which time interval(s) dvc : g(5ktpw s-060eaufnmxo-id 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 accompanyinzb 070qi4b yxbidos 5: *btz0pg graph describes the motion of a marble on a table top for 10 secon ioz0sz0 b5:4 bxtb*dpyi0q7 bds. What is the marbles average acceleration between t = 3.3 s and t = 3.8 s


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36#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.20: A car accelerates uniforr6xi.ri)hc21e4 +-n gse bwramly 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 stral4wgi(3zc.buqu+; 9li 4wg hyight 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 correctly represent the motion of an jp m1 c,67mb6n(;v gd, dqiluiobject moving with a constant speed in ji6dbvm,g( ; qmld71up,cni6 a straight line?


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39#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.24:The accompanying graph describes the motion of a toy car across the fb7nm fjnd o/)ro3ss87y 2hv7b loor for 10 seconds. What is th n7r smbdnhj23)8 o 7bs7vof/ye 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 the motion of a tooh+i7f*/(ai dh e* tri 1;/rqykg; rjby car across the floor for 10 seconds. What was the tieta *//( hqh dri7o*+gjk ry;;ri fb1otal displacement 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 ofd(iw5 ;bkk-cp a toy car across the floor for 10 seconds. At what times or time intervals must the net force on the;ip kb-kwd(c 5 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 4.50 s.yv36ft ,p3mba o1+viuv, 7twm Which one of the following choices best re mbv 1vvif+w6 3, ,myt7p3taoupresents 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 theysx 1uy.ws fw*6ti7g:sc+ q9u velocity versus time curve shown. Which of the following statements regarding its motion is9 y6uq*+:csww.x stsgif7 y 1u 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 2 xb4;eynbvv /according to the velocity versus time curve shown to the right. When does the car bb vn;xyv/ 4e2have 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 tc 9 +/evomi1wnhat the angle between the velocity and the acceleration of the ball is kept at a constant 120 degree. Which statement is true about the t1nevo /+ w9cimennis ball during this interval of time?

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46#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  07.03: Two automobiles are 150 kilometers apart and traveling toward each othel8(i odqpa. p9sm.af-r..isa8od(p -f.a p9q lm
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 moveh n)w:w4p1bdhd(w 2t2 u0ym1lz zqjnuf6w:- ys on the x-axis. When the acceleration is positive and increasingzh(nqzwu)t 2byh4yw02ulp-w6w:fm d:n d 1 1j

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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 avz f1w5w(w4t:k8 pbwtserage 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 cegve;1 g *2abcao;q 6ohoices identifies quantities that must gvo eo *6ga;;21b eqcahave 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 move70 vjjtu438qtli qb e7s $3.0\;m$ 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 tc88d22y vs(e/t+id hfe-e dd, $y\;vs\;t$, 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 l 67yp:fvdpl5ddgrd *8u6 as8track for total time T in two pap8ld da pdf6g6 y5d8 :7lvur*srts.
• 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 t jza5lw-lz 50yrack is shown in the diagram. The thz ly5 0z5law-jick 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 stn95ie dymg3pr +67 ckvraight track is shown in the diagram. The thick line represents the velocity. Assume c 739iygdrkn+6pmev5 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 given b3*g0fy;vgi y fy the position vs. time graph shown. For what time(0gy*fiv 3 fy;gs) 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 mo :5vr/je9vn awekx/0j 2mjml**e (zus tion of an object given by the velocity vs. time graph shown. For which tzmju a:menr(v/ee 9xw j0j25k sv*/l *ime(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 tq,7q9 laiv .dzhe area under the acceleration vs. time graph for a fixed time interval of an object’s motion, what quantity has been de7divaq,l q .z9termined 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 witen8vayo u, ;*ed) v;hyh increasing speed.
choices could represent the signs of the velocity and of the acceleration for the object to achieve this motion?

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59#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  11.14: A car makes a trip in tw e3nqyl*6ju65 z(jlodo 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 sd:u3v( doam 2from 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 from rest and reaches the grolg.x-z6a*)9bavz mb wund 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 gracwx0zc1s9 :6w+m bsaiou 9pty7x,/vqph of a particle moving along a horizontal axis is shown. What is the tot +ia6xsbm0c7/ c :9sw9,tv1xpu yz qwoal 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 ident,4rhtf4jp m-g) e+;zvgc1bfxi zisy1 *s .s:zifies all of the listed situations for which there is a non-zj z+-ghx4mvigp1fc: rz.zs bey4f;,i )*s1t sero 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. timeu0wi bflq36.h,0klnq graph for an object moving along a line is shown. The object starts . qfiqn0lk,6ub hlw30 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. tim3.7zuh 5 gsnt wyw+qm 3w.htsj; pqnk*; ;jh)se is grap) pzqm htyj+wnhj.;sh ;sg s.5;t37wqukwn*3hed. Which one of the 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 horizontal track, u/ opf3 qhr91teach with constant acceleration. At an instant of time, the information about the/f9 pqr3t ohu1 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 p h::t2 elpc ku8 eo+o*)6xezpcxl6 oq5osition $x$, 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 grno bz) 8t;s 00b/veksqaph, which one of the following choices correctly describes the relationship between the average speed of th0q;0nkob 8ve)s tszb/e 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 describes the j n/sfx 51drq3 fsz:i2 x8s/sjinstants of time, at which the cr nfs 1x2d8f:js /zqjs53 sx/iar and truck 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 anoi05avv0ew.fjypt r 1 + so)0nd will move along the x-axis. The acceleration vs. time graph for each car is shown. Which one5vn.ia vsp) tej0w1oyrof0+ 0 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 obje;7req8nt x3cj,(skq pct moving on a horizontal line is shown. At what time(s) i j78 (tq3r;en c,kxpqss the object moving with 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 5,6su2/s sx:nvs2 x9bsbj ec cx-axis following the position vs. time graph provided. During what time interval(s) does the mass have zero accelerationss65c, sbu :2e9n2bs /vjsx cx?


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