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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 8n)dx*: cgqkxtqj5v ubev-n6y.;6r6i 9 s gw nof 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 cnl1jl4 b1d pz,.g yp9m+2gjzreference to a particular direg+ppjlm .g,nj412cl by9zd 1zction 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 lapj8 mm m7l qo1y2,p1evldaw49v around a circular track at an average speed of 50 m/s and then completes a second lap at aymle1m8d 92 qmo,p4l wj 17avvn 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 0k/(;o mv)af 7xd knta(in7,g1 8wyj gj.80 m in 1.0 s at the constant velocity. If it continues, how far will it tragt 8(jxom(aad7jv/y7 1n,kfgk;w) n i vel 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 sliding ate eo:nhlu5otw0 0 :4f 9cvau)m 5.00 m/s to the right across a frictionless pond. The boy thm)e:w fnho00tc 5lvuue9a 4: oen 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 400 km at 80 km/h and 406c 3 t,s;as yjfj1nz4 6hd 0uk-o(jqyz0 km at 100 km/h. What is the average speeqsk1a3o fh6s ;-d0tjjc yn4,z6zyu (jd 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 a toy car traveling along the x-axjl6zqji v3brtp 2y kb09q:3y9is. The graph shown below is a plot of the car’s velocity in thej2kqtyzbyil30:p qv6b 9r 93j 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 xfsw )cu; aql40c2/4f f3ckiu q-axis. The graph shown below is a plot of the car’s velocity c3f2a4iu 0 kw;uq)lfcf /c4 sqin 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 c/ssf8kc d5r dbv(q1t5ar traveling along the x-axis. The graph shown below is a plotr158sd( 5/ cqkdvfbst 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.ds-d/1tw ss8f0rp)jfvkv;x 1 time of a duck flying due south for the winter. At what point did the dujf vv;t px0rdd) s1-sk1sw8/fck 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 diagvk0mnh 2yebv 4d4f, .zram below which shows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight lihzny.4fv,b m0vked4 2ne. What was the average velocity of the car during the third second?


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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.18: This question refer to the diagram below which shows the position aq3jm6x0-u/a4/o 7xn 3y t ao4mr ahbmnnd elapsed time of a car starting from rest and uniformly accelerating in a straight line. The average acceleration durimjbo ta4o3u63 7a nay-q0r/m 4hxxn/ mng 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 velocitus moj.4 92zv8vhsyebqx +-e:y time graph for an object with the position time graph shown in the diagram aq -.bo exvjmhv9u:+ys4e zs2 8t 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 r-3j23wc oyre8 5qkwxideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor and rebounds to its original heig5ykqr2jo3wre-3w x c 8ht.
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 queszb ec*p:/ xv)n (2xedation refer to the following information. An ideal elastic rubber ball is dropped from a hecpexae *(x)nb2zdv/ :ight 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 speedwf6 ej1w( y,9bv:sex vi d.lh6 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; gq(j + bbh:by3jwu1z 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 fsxwm ., .dcxe 58io.yiollowing 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 t71s sxchdowv+2u c ks81j qd(5o 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.
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 following scenario99 sn2sua.r mve9 *ijv: 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 hap lu641j;m8d 8 yw yi6(wc.rv7nlrtforizontal table top and off the table edge. Which of the following would best represent a graph of the magnitude of the ball's acceleration vs time?cp8u7 y( .w6f 1y;iv4 al8rrnjwl6dtm


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22#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.01: The graph represents the relationship between distance a izu:y :lxn57-gu(mo5 qvt+iynd time for an object that is moving along a straight line. What is the instantaneous speed of the obje uq 7i(nm:oulvy-: 5yt5+x gizct 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 /. vk.ax-k.h7ygndm ifor an object that is moving along a straight line. Between what times did the object have ani.y7hv.amkg .-dk /x 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 dowy+re;ss iq+ 8f2lr zm0 7vl:xynward on Earth with an initial speed of 12.0 m/s from a position 10.0 m above the ground. Ignoring a zlemvyy7l+f;ss +r:i02 8xrqir 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 startins1 cz4wb*)bqy g from rest and uniformly accelerating across the floor. The time and distance traveled from the start are shown in the diagram.zyq)s *b 1cb4w
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 09nufabs- dd( and uniformly accelerating across the fldu dfn -ab09(soor. 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 ca 2xlqo +wi70njr starting from rest and uniformly accelerating across the floor. The time and distw qjoxn2 0i+7lance 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 position o ,-vrz l/8sxfjf the ball each second isxsl-j f rvz,8/ 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 accelera siu4f;be 0k(mtd )(qiting ball. The position of the ball f4 mu( )bd(iesk;0tqi each 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 inramk8cqs.g sbi7 *q7+ a straight line is s.7qqsi mgk*7+cr8sa bhown in the graph below.
What would be the acceleration of the clown at 5 s?


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31#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.18: The motion of a circus clown on a unicycle moving in a strzes/iyg u*, 5jaight line is shown in the*j,y ugz5/ies 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 vacuum near the surface o9o)g.ytauz7z3. /cnredv--7ho gy iof 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 thzs-y6k(cb;i2ku ltp9e motion of a marble on a table top forkulpy 2i(stz;-k 69cb 10 seconds. For which 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 describes the motion of a marble on a table 5c sbuif c- 9h,lslg4yir-6w.top for r 4chl -y 6wgsuf.,s5i-9cilb10 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 motion of a marble on a table top 8 em qco2y3/;mqvi lk. e;+qrcfor 10 seconds. What is the marbles average acceleratiee ;.2ymoli c+ /rm qkqqc;v83on 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 acceleraij n;d 3n4 iz whgq(5bfic*d818w nb5g6h mrk1tes 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 straxu9v x0sqa5/yight 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 coz j; ger/cy49wrrectly represent the motion of an object moving with a constant speed in a ; 49 cz/wrgjyestraight 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 m (/(n4pmrpd8tym5 koiotion of a toy car across the floor for 10 seconds. What is the acceleration of the toy car at t yinp(5mo/d k8 tr4 p(m= 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 58h/oc4cx9 gf9uu afnacross the floor for 10 seconds. What was the total displacement of the 9 /a9u8fch4ofgnu5xc 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 oo tm+f6i+llr ;bhkr7k);9lz qf a toy car across the floor for 10 seconds. At what times or time intervals must the net force ; 9q;l hmi+l 7l+)6fk tzkrbroon 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 tz.c9f2*20lphqw4 whnvc m b+*fbpdw-o 60 km/hr in 4.50 s. Which one of the following choices best representhpfhq- 2ncbw2w*+. cfzw0vmdb*l 9 4ps 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. Whic xhurh1. g 29yoaob*s,h of the following statements regarding its motion is NOT 2ooxg,shy u9.a*hr b1 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-3w12 /ddczak8ljo hr3axis according to the velocity versus time curve shown to the right. When does the car have z1awldo /j 3 3dr28chzkero 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 os nm;qe44 bg q5w9i.xif time, a tennis ball is moved so that the angle between the velocity and the acceleration of the ball is kept at a constant 120 degree. Which statement is trq ibg;49mq4ewsx i. 5nue 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 :(68h zwghw i0 8(pfzbq,fanotraveling toward each other.zw fp(qba 6g no8f0 w:hih,8z(
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 g.0rm1g7b3miwii9f g increasinb1wm.9grgmfi3 7iig 0g

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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 a ugg f:l1)khlylea. ,as2d: m-verage 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 ie.rvf y*0o5j7 uwi0svn two dimensions, which one of the following choices identifies quantitisroy f7.i0 *0eujv5wves 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 movvlp202 b kp5in dzx/8zes $3.0\;m$ 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-hbo 3ev:nb1v 4time, $y\;vs\;t$, 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 t .9s3 )g ; kohjdsmb-ht6+ypsalong a one-dimensional track for total time T in two parts.dtyh+mbo39gk.)j- tsss;6 p h
• 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 ud/d.tw p0a/eu1 o l0fa car on a straight track is shown in the diagram. The thick line represents the velocity. Assume that the cul/ew do0.t1 da0fp/uar 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 vayja,zt(4 yd+ s. time graph for the motion of a car on a straight track is shown in the diagram. The thick line represents the velocity. Assumjzy t4(a+ad,ye 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 give6 zj*g0doe /ivvj6xz*n by the position vs. time graph shown. For what time(s) is the ivx*ejo z v6dg*j/z60speed 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 velocity vs. time graph sho2,zr(9zpib8gj v sxg-t8zet1wn. For which time(s) is the acceleration of the object equal to g1v8t z zt2,gir-x9j bez8s(p0?


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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 gb7z;ngg557zaxiq q iv3c. e7u)q s ce5raph for a fixed time interval of an object’s motion, what quantity has been dein.evu5e7 ;gg3s5zcq7)bic7qqzx a 5termined 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 line8 p*)xz rd hvv5lk z:8qbx;5ut 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 pp/v v3i6kh/ktrip 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 from rest and reaches the ground in a tim;tua 715w hlcee of $2.50\;s$. Neglect air resistance. With what speed does the object reach the ground?

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61#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.03:A small object is released from rest and reaches the ground in 3q o7d drr8)lea 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 partivu ke k;s 5/ ikg:o; g;fvr:eo oykhp+8re0,*pcle moving along a horizontal axis is shown. What is the total distance t:50e p*uo ;; pk;+8e/v:yrog ,k kgeskiohvrfraveled 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 aci7agkv850av23 lm b correctly identifies all of the listed situation 3b vlgk05a27miva8c as 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 acceleration vs. time graph for an object moving along a line ie6xg6hbh fh76 b3g0 +jxwnkm .s shown. The object starts from rest at time t=0 s. At wha b .fh e0jn7bhkwxmg6+hgx663 t 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 and92v5 vcqffsp--k)i hd its velocity along a line vs. time is graphedv9)is dqchfkvf 52 --p. 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 r8d9 ;k +mva)vka5pnm +x*stgsight on a horizontal track, each with constant acceleration. At an instant of time, the inform) n+8g ax59p+matvv dsm*kk;sation 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 bs9 q5u+i;bsuz dnb;z9 -sq.n a position $x$, as a function of time $t$, given as $x(t) = -15 - 25t + 10t^2$. Which one of the following choices represents the magnitude of the particle’s acceleration? All quantities are expressed in base SI units.

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68#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.41: For the entire time shown in the graph, which one of the follfu9,vg,m/i yd,ijlv p luu v0h*9b.9sowing choices corrjm fiivv.ugp l9,y9us/ ,v *,u0lbh9dectly describes the relationship 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 describes the instants7 zm.jaa-v- /fr8.zlx v/glrw) hro *tom-zy( of time, at which the car and truck travel with7a) 8ol yor.v*z-tml/ rzh a w m(-/frxzj-gv. 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 a kn7pb*.l -7k f:rr2 -lcdnqyand will move along the x-axis. The accr2ry.:cp l7- kbq k7fa*n-n ldeleration vs. time graph for each car is shown. Which one of the following choices correctly identifies the relationship for both the speeds $v$ and the positions $x$ of the cars at time T?


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71#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  16.02: The position vs. time graph ej- 7:nmczgm 50oeub/j:t ;aajnuag5.q,b l6of an object moving on a horizontal line is shown. At what time(s) is the obj :jo btg/n aenbc0majgle,jm 5 ;.5ua-:qu67zect 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 x-aw+ hi t+,uii( wbx,uz,xis following the position vs. time graph provided. During what time int,uu ww it+,biz x,h(+ierval(s) does the mass have zero acceleration?


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