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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 circularjn5wnar6c- 52b2*gdcqk po /k path 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 rm4e 6ovus5/ 6l dje4*zwq5s.h 7vxwdpeference to a particular direction isvjshm 4 o/q6su75e p .dd6wvl5xw4 ze* 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*+qd :wq 6a1fieiqdh o r0y6/t lap around a circular track at an average speed o w:tq1q + dyq6dar0/ie6i hof*f 50 m/s and then completes a second lap at an average speed of $V$. The average speed of the vehicle for the completion of both laps was 80 m/s. What was the average speed $V$ of the second lap?

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  95.03: A toy car moves 0.80 m in 1.0 s at the constant ve f gml)sj.;bf6locity. If it continues, how far wills ff)l;.gmj b6 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 on a 3fg+ rr1d /yq5 xqnj3c8ne*w2 p0-kg plank that is sliding at 5.00 m/s to the right across a frictionless pond. The boy then turns and starts walkxcnjr1d8y/pqf 2*rq5g+ e w3ning 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 4d 740bnxv*qi3ptr kfkm/h and 400 km at 100 km/h. What is the average speed ofnxdrv03 4i7*kf4qbt p 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-axinr4 0e0jqwffzf -fk4 o jtx41/s. The graph shown below is a plor/j0k 4fzo njftwfq f- e44x01t 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 the motion of a toy car lp(86im ,+d wcx(ds.qoy pvb0traveling along the x-axis. The graph shown below is a plot of th dplcq(xd8,(sm b p0vi+.oy w6e 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 traveling along tho-k-j/mhbo a8yb 4x.n e x-axis. The graph shown below is a plot ob4hb-- /nk mox a8yoj.f 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 flyijmhnrly84;ptr o4-6 +fi5vzrc l0j s3 ng due south for the winter. At what point did the;mi6c04 r nvh3r zo+4 -l5jryp jlt8sf 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 p ;e(pqwq/0 qjx.p6dt aosition and elapsed time of a car starting from rest and uniformly accelerating in a straight line. What was the average velocity of t/q(twq j0qpx;p. e a6dhe 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 sh1a (hp3d, lv9b a.sbuyows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. The average accelerabbay9 (,h3 dp1au.v lstion 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 .uxy.;a(b .vci nx2gcv .z8 yrtime graph for an object with the position time graph sho;(xary . v2.xc.gnuzv b.cyi8 wn 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 qu0vbj l+l* a 6ewk6sk(pestion refer to the following information. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor and rebounds to l6kjp (0*6slekw +vbaits 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. An ideal ela.s+ so(d xr;tdstic rubber ball is ddd s.(;+rt sxoropped 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 trave8ckr6o rz )4mh6el9mx ;rxr(u l 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 follh,pg h07ttmq-( r i-si,xkl)eowing 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 refer;muhjg hl3xywt/ 0j*6 s 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 followiny;9j7int+2t b lepj c.:jsnr;g 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 the3dkg,ek u07z m 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 ramp, across a horizontr8 :qxei/n*plv k4o4yal table top and off the table edlqv/ke p4*x4oy8i r n:ge. Which 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 represents thi1 185 ycmkpm0wdl pmw3)o qo5e relationship between distance and time for an object that is moving along a straight line. What is the insta wck5) pmpd1wmy5q mo30iol18ntaneous 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 betweencs9iwba8 kl/, distance and time for an object that is moving along a straight line. Between what times did the object have a lic 9, wk8b/sanon-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 on6 zcl82 :g .m9+rs smgit5qwtj 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+s .mc tri2mtj56z9 :qlggs 8w 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 fromuqdzbo ,6coxp;.7pd8.x, b ,qra d(ce rest and uniformly accelerating acrq,p , 6cobzdcd.,xa(qr;7bp.deuo8 xoss the floor. The time and distance traveled from the start are shown in the diagram.
What was the average speed of the cart between 0.1 seconds and 0.3 seconds?


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26#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.12: The diagram below repf sgt;6w ;7-)byjykit resents a toy car starting from rest and uniformly accelerating across the floor. The time and distance traveled fro7; s;t)tf w-gkbyjyi6 m 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 starting from rest anw874qca,xnkt8)se -i rlg(wid uniformly accelerating across the 84er q w-ik( xw8an )7il,ctsgfloor. The time and distance traveled from the start are shown in the diagram.
What was the instantaneous velocity of the cart at 96 centimeters from the start?


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28#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  04.08: The diagram shows a uniformly acceler h x-ciommrxvh.9;69e v8*jy -hyk7qgating ball. The position of the ball each second is in 9joh-. mx7;h-y 9mv8eiqv h6kr*cygxdicated.
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 qp nn. d9p(ps0accelerating ball. The position of the ball sq9npp (0dpn.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 unicyclep ,f// 1ipg*xdzym:oicr5, pt moving in a straight line is shown int,rm:pp 5g pxidz*/co/,1yi f 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 a,a )lqz7ra-k,axf;ekw; w z; clown on a unicycle moving in a straight line is shown in the graph be)rqkw fla wa; x,k-z ;z7,aae;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 surfij1oyv7dj. *.4eui ciace 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 motio9 m3 huy zex0lv1f4s)kn of a marble on a table top for 10 seconds. For which time interval(s) did the mvh9ysu z4fm30kx e 1)larble 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 descri v2dpefyp1zb(i.myin n. .h28qte d61bes the motion of a marble on a table top for 10 seconds. For which time interval(s) did the marble have a posit2v1(y 1q.edpib.8mid p.fhz26y ntne ive 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 7qei;y :;rrpp-ylzu cvaga7f) )-*qy a table top for 10 *c aylz--a uyf pyer;:q)piv ;g77)rqseconds. 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 uniformly from rest f. i-8( evbu4hyg m.lwbor 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 downward with a sp 19/0czwyn)src:m h 3 dc()r8fdyb digeed 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 couh+yz , ;u s;kt/-vsghjld correctly represent the motion of an object movingus,vjh;ty-h+ sk;z/ g 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 describes the motion o 9of stpm2ri)o*8 g3ntf a toy car across the floor for 10 seconds. What is the acceleration of the toy 9pi ot28srotfm)3 *gn 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 accompanyingwq)e,l ctdy, i2 3cya( graph describes the motion of a toy car across the floor for 10 seco di,qywl)ec,yc3 2(ta nds. What was the total 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 of a toy 26w- qfggvf7gkoy/+rcar across the floor for 10 seconds-wo2r6/ qf+7gkyfg gv. 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 uniformly from 0 kmm .ekfdd31pe28v( t uz *r4dnr/hr to 60 km/hr in 4.50 s. Which one of the following c (duzdm epvrkfe341.tn*d2 8rhoices best represents 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. Which of the following s itzg xi9a0m0+p lt;:d/jux/btatements regarding its motiox : p00/d tm;agu ix/lz+jtb9in 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 veloci9evv)basd.2ukyyt 5x x.6rh4 ty versus time curve shown to the righ564 hxevxusk.r. y2)b ta dvy9t. 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 betw00 t4m k mc6/tbajgyb-een the velocity and the acceleration bmkgj0y4bt/a t c0m-6of 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 traveling toward each otqffmk3 2srt1.j 9 qft579rdsx her.9t7 9rf qdjstfk f2mr1xs.53 q
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 positiv;koh: xga;ju;x u qcor,i+61 dtad81ye and incr1c 6qxooy+:tuh rdi ;g;ud;x,j18ak aeasing

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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 averxru:hew7 . o- )r)a lplhndu-+age 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 foq8oy3 * n yfn+gafpf90ytr6e 8llowing choices ident88n6 fo3ry+ pqetf *gy 9nyaf0ifies 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 u*ifxv)yef09hpg0 nt8xurd:jz 56 1j$3.0\;m$ 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-th1yaxe/o ,ptuit ( 1w1ime, $y\;vs\;t$, 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 to cph/jie bbk1 lkx5-5.tal time T in two pak5 jb1cl.k-p /b5hixerts.
• 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 a2d-z34d3hw ure dur5n straight track is shown in the diagram. The thick line represents the velocity. Assume e - dr4n3w2zuh5r udd3that 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 straignmjj- ,jyxb a;l)0/fh *c8dkv ht track is shown in the diagram.,j *d b-ck;fn l0hvmjj)ax8/y The thick line represents the velocity. Assume that the car starts at origin $x=0$. What is the average speed of the car for the 10 second interval?


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55#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  09.08: Consider the ms /7nqgt8nkdobb: 363qb kf0p otion of an object given by the position vs. time graph shown. For what time(s) is the speed of the objeqq3f t76/nbond0sb :bk38p kg ct 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 giv7 e2x( rh8.jyq8ifikcz yj/s9lt ems h)* )5gven by the velocity vs. time graph shown. For which time(s) is the acceleration of the object equal t q/ tjl c.*yrvy k79 xs88f)s(ej5)g2ihe ihmzo 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. t+ 9 c1wagi/fmbime graph for a fixed time interval of an object’s motion, what quantity has been determined for thabcg 1a/wm +i9ft 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 increaso0o/m 52 t+xe,ywednru; ugt (ing 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 two partsu1hcf3+rg )cl:
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 time ofx;*d/ 9mfpak.w3 c txta9ovvy d+9:sx $2.50\;s$. 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 froj-lji 6c uepj:pkyua1+c./ .m m 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 graphn+ d cyh *wcv:jp0nxjsr;wz+j5y* ):m of a particle moving along a horizontal axis iszy ymj:5v +*wj;w 0 cnd*:nrh)spx+cj shown. What is the total 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 idents7xm4kp92x -rg9w+hzlqm:g s ifies all of the listed situations for which there is a :xl -s khpw92g+ r7m4qxsg9 mznon-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 sh4hpu,o zjx *w(ct.wxs3uy)k6g s4*awown. The object starts from rest at time t=0 s. At what time(s) does the6sxgow)tuj* 4yac kw3( h*4wx z.us,p 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 mmux h1n-y2-w -0k*o7s fapdathe origin and its velocity along a line vs. time is graphed. Which one of the following choices best gives the proper i-0fx1-*wok n 7d- ym ah2smuapnterval(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 horizonct03 b rcqrlwc*f03+ztal track, each with constant acceleration. At an instant of time, thl cc rcfq+ t033b0rzw*e information 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 a p7:df:rvf/;u px q7e eom7bp.kosition $x$, 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,1h5of py2c j,mvvp7o 2r5 5qom which one of the following choices correctly describes the relationship between q55hvro m 1mop,f 7cp2oj2v5ythe 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 instants of time, ao;3syv: kc)2. popo54za vmeft wh4vkesp ov2)o y;:.mzfpc3oa5ich the car 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 staro;qh+6)tg hzovoz, a ujo26+ut from rest at the origin and will move along the x-axis. The acceleration vs. time graph for each car is shown. Which one of the following choices correctly identifies the relationship for bozuj+6)+t2o ;,av uhz 6 qooohgth 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 horizontal line is s/ysw(e/) r irdhown. At what time(s) is the object moving with its greatest speed? ie/wd /sry)(r


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72#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.08: A mass moves along the x-axis following the position vs. time graw.5gkq49mjluvg1b 9 g ph provided. During what time interval(s) does the mass have zero acceljl wu1m4gk bg.v59qg9 eration?


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