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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 / 4w2rblp wl6lpath of radius $R$, if the particle makes one complete trip around the entire circle, what is the magnitude of the displacement for this trip?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.01: The change of distance per unit time without r0ihd*r j npfv3 z3n9a66 zy9ndeference to a particular direction n*r nz3z0paiyj hd9ndf69v 63 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 circu,bn oc*+ghlnj6xd.u 5eq8*rm lar track at an average speed of 50 m/s an*xc,r8 5ogulh n+qn mj* ed.b6d 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 rx qi:g(/z (8hv:xm paed/ve3 s at the constant velocity. If it continuesv/(e ezg q3pihr/m8:v(xdax: , how 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 stationary onp e*q kuof7c:2qi8f; k 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 the plank. What is the speed of the plank rel7f :c2q*pok ;uk fq8eiative 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 400y9ehdp9*mmen c+1 u u; km at 100 km/h. What is the average speed of the 99u* ypunm 1hced+; memotorist 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 al1n3fjt1pr 1n,+ukq/394 gag fidxjyeong the x-axis. The graph shown below is a plot of the car’93fd j/ y,ngaiq1 k1g+pn j ruxt134fes velocity in the x direction, $v_x$ versus time $t$.
During what time interval was the car moving towards its initial position at constant velocity?


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8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  97.21: This question refers to the motion of aot /k6 l.m9tqkgu5-.b2ed 86 aovjvwq-y mj,j toy car traveling along the x-axis. The graph shown below is a plot of the car’s velocityl-q toaj- mjey.uo.6qjbgv t9/w8kkv562 m,d 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 4 6xv/kb9iuxfs.pz8othe motion of a toy car traveling along the x-axis. The graph shown below is a plot of the car’sz b/8spk9 x 6xvufi.4o 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 flying due south foaha)fd4 m l,qw(deu;*c3q/c ar the winter.4lqed d/cquh(ma,* w 3)caaf ; At what point did the duck stop its forward motion?





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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.17: This question refer to the diagram below which shows the pk*r7 kml 0x-nodn40u zosition and elapsed time of a car starting from rest and uniformly accelerating in a straightk7nrn0u0 d lmkx4-z* o 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 refj8k1ijs5h-r4/pawyg.xy7e t er to the diagram below which shows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. The average acceleration during the entire 3x7p a i1r/y-je .8k4sw ht5gyj 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 veg(a 7x)bmiig * b-vhp,locity time graph for an object with the position timep gvi7hb)x(,ag*m - ib 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 kc8m q:eaq y4/ot6p4jp u*3.fv:b ap irefer to the following information. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the fkop3aj6/qpq*f4mbp.cy u: 8 4 aeti:vloor 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 fz0l9)k vmjop+ ollowing information. An ideal elastic rubber ball is dro +zokvj90p lm)pped 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 pxzzo:19 yb e;hsep1n84z s7a 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 foll) gg;5v ffdb)zly p3x9o7py6w 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 to the follng x)mv k om77d*fj kxh6a:3e;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.
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 folgg, ) et6op3kglowing 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 scenario: At rhp4a f;3upx ($t_0$, 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,i7w 0cn; hrlzqh8ancv 2 6 o+,l6t4gzl across a horizontal table top and off the table edge. Which of the following would best representg8nw4a,0l 6 6licl+ rncovq7z ;2 htzh a graph of the magnitude of the ball's acceleration vs time?


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22#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.01: The graph represents the c/v/24 aylh2do0 /f w a; urf:ei8cfvgrelationship between distance and time for an object that is moving along a straight line. What is the instantaneous speed offc 0 l:y/ocd4grf/afu8iv;aw2v / eh2 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 a 6f+tib t9f6arj6vm6 mn object that is moving along a straight line. Between what times did the object have iv9b 6+t jmt66mrffa6a 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 dow 7(vzps2skb x4nward on Earth with an initial speed of 12.0 m/s from a position 10.0 m above the ground. Ignoring air resistance, the speed of the object whenkbvp sx(z47s2 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 carc m8zms,slh)e le45x- starting from rest and uniformly accelerating across the floor. The time and distan ),l4 c-elh ex5zsmms8ce 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 frc/k2;9v fbnav a5kn9dom rest and uniformly accelerating across the floor. The time and distance traveled from the start are shownd k/a cvnn592bva;9 kf in the diagram.
What was the acceleration of the cart during the first 0.4 seconds?


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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.13: The diagram below represents a toy car starting fr(vni30 )johswom rest and uniformly accelerating across the floor. The time and distance traveled from the start ari(ovwj) 0 3nhse 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 sho82;k+rbsgbq25y l nx d7 6sxxvws a uniformly accelerating ball. The position of the ball each second is ind s5n dlxrx8b 62qg+s xv7bk2;yicated.
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 balr03 zkhd,c 3dul. The position of the ball each secokd3hu 3c0d,z rnd 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 straight line irrze z0+sf9tty(j. *l-l3tvn s shown in the gralre f-t (j9*3nysl . t0zztv+rph 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 straight line is .y ,r(qyf l3n hm.j dts49qr*eshown in the graph b (r*qle93h fq,t .dsjr.nmyy4elow.
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 eart*4xvh +;cgc of3bf u1yh

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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 o+ v x(1)blu: gdipw/3 +sgtqdta8 ek3of a marble on a table top for 10 seconds. For which t3s atkpgdxo1tuv8+/ lbi:w )eq3 +d(gime 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 moti r e/i)t3ul,yion of a marble on a table top for 10 seconds. For which time interval(s) did the marble havei3tl) /iy er,u 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 accompanyiqobwh 8 nyp qayw4vq +3bl)h-b1j+a-6ng graph describes the motion of a marble on a table top for 10 seconds. What is the marbleswh -)onw 163abb-8+vyjph4+ yqbal qq 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 uniformly from rest for a time o7pt g.cu qo9-k7e1na df $2.00\;s$ 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 downward with a spf: l70wt4pg oreed 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 correc lb c ;02ow71txv0w t3pskvan*tly represent the motion of an objeccxn lt*k v7s2wb30;vpo0 wa 1tt moving with a constant 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 describ 6ahkl-, l8nntlh03tbes the motion of a toy car across the floor for 10 seconds. What is -l nbah, 863thk0ltlnthe 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 mozq3 x1dr q;*l* -hlkwkbfb)1 qtion of a toy car across the floor for 10 seconds. What was the total displacement of the toy car for the entire 10 seco-bldb wq )1 l*3;q*hr1kzq kfxnd 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 of a toy cbv93o(zdp i -wg ;tez-af+fq1ar across the floor for 10 sec;(+owqzf- vptab9di-3 zfeg1onds. At what 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 uniforlz1p;k g5kqkrdf :/j-5jw v1cmly from 0 km/hr to 60 km/hr in 4.50 s. Which one of the following choices best repre-:k1jzglw v kpj;/rq dc5k15 fsents 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 gb:(2cg fak jdmr f15+k49(ufjb / qhsvelocity versus time curve shown. Which of the following statements regarding4c1ru9kgdkb +jfgf:b5q2 j f(sa/h(m 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-a3 sisd yfwj1* qt6v,1gxis according to the velocity versus time curvej*sdvyt1, w qgis631 f shown to the right. When does the car have zero acceleration?


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45#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  06.22: During an interval of time, a tennis ball is moved so that the angle be ;mmc eaa2w.:ytween the velocity and thc;ew mamay: .2e acceleration of 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 and travel 1o9 scasw2otx n1/+mgqcl/f5ing toward each other.cnta59 +s/o1lxc1 2 wgq/fosm
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. Wi lnx g*xup/ 9ijm, u65uw/ye4hen the acceleration is positive and increaswxlgym*uuu5e9/6x,/ij4in p ing

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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 averazmjw/g*jf2 ag 3 m+x.wge 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 follofkh( 1.uwq - sisfjf77wing choices identifiess1(sif u fhq-77wkj. f quantities 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 moves z70+d ggo1s t 8j2ca9njq tyx/$3.0\;m$ 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-tim6 gkpvtt/pxl( k07dd.c 7fv6ze, $y\;vs\;t$, 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 total tiq5kza) :o;tkdtg. u;0if szl +me T in two partzt; kdtfk )0qgis .o :zl+5a;us.
• 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 s,kb ::585 p- x hsj *qscgfbcsdoiv(1btraight track is shown in the diagram. The thick line b ::c(v 5co-xb kq8gds5h fs b*p,1sijrepresents 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 stra1 n+b3pv +ele+p7fqtright track is shown in the diagram. The thick line represents the velocity. Assunl1+3rvpfepb qte+ +7me 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 mowkqc)6 27vgzo8ugl a9tion of an object given by the position vs. time graph shown. Foru glw87zc )9qvg2oka6 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 given by the velocity vs. time gr4 6v+9 zzm-jce)f oa.s+dwelp aph shown. For which time(s) is the acceleration of the objeel z)oaew-c mz.6sd9+pvf4j + ct 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 arna nnj 72c0hc ::rj1ecea under the acceleration vs. time graph for a fixed time i:c102nh:rc anjc n 7jenterval 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 increasing speed djyx5;-ntm v7.je,o tpsl( dnh242rn.
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 z3ln *d4o8 dkmbkli03 trip 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 tim6d b7q ctk3sz4p (vf t1);pjy1c e/prpe 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 gac.,x ))ll.deouyeufo :4n9v round 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 hohgfn5s9n 6pv8; copdz7tjd). rizontal axis is shown. What is the total distance traveptnjhd.7do 9 ;gnscv8fpz5)6led 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 identifies all of the list z:bkis*j-m l f-if+zp yp55+ged situatio5ylfzzp- 5+s*pmg :i bj-i+fkns 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 movinap6aud8+ k/d9b lg7vvkn md2 e-0qwm -g along a line is shown. The object starts frodd0wkpag+l v-du82mm/qn9 k6 abe v-7m 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 uld1c 0 59lwm) dve+cjits velocity along a line vs. time is graphed. Which one of the following choices best gives the proper interval(s) of ti5mwjdv9 cl+0 ) 1lucdeme 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 horizofwobkj)z-u: ;q y2 l4p4ou4hantal track, each with constant acceleration. At an instant of time, the information abo2 oh4oj -blf4z)ky q;4u:auwput 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 position z syv/q+ne-b-ffggs,i *c3 v5$x$, 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 o5mo kh++w0yt u.0 vambne of the following choices correctly describes the relationship between the average speed of the truck m5oht.u0m+wa y0k bv +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 instants of ti0nw,gun,tmpyf:p 9; ame, at which the car and truck pwfn,t:; m0u9p y,angtravel 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 orig.00bb rpd.hohh7n o r,in and will move along the x-axis. The acceleration vs. time graph for each h,rp h0 .0nhboob7 .drcar 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 anrgf2-y- j5c mm object moving on a horizontal line is shown. At what time(s) is the object moving with its g5ycm- f 2grmj-reatest 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-axis8) bpg re22d jd8orgj3-nxac : u0sn,w following the position vs. time graph provided. D g ope:rujdj3bgdw)c08 28n axsn,r-2uring what time interval(s) does the mass have zero acceleration?


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