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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: 游客未登录  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 constantuwv+hzrm v0; dsp4e,+ speed around a circular 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 reference to a particul q ldo giaa6.c;r/2q 4g:x/,sd1pqpo tar directipqd osip;.gg 2/,/41cq l ra6 :tqaoxdon 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 arounk39 zazbux.n)d a circular track at an average speed of 50 m/s and then com.an3)b9uzz xkpletes 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 ygt-2 pmfj0cs5f e 6+nf+ghr(0.80 m in 1.0 s at the constant velocity. If it continues, how far will i2fhr0+6c(y g+ge fmtsj-n5 pft 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 30-kg plank thac6 n(;b(0(ib gosjr ,tlbpqtpe;.g9w t 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/sc ebl (rgw9np(qt;tp,bgo.;b( ijs06 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 travdbeediiu4a6 * +o5vub cs,pf ;r.t5f4 els 400 km at 80 km/h and 400 km at 100 km/h. What is the average speed of the motorist on this tsi ubdicv;rto6 eep.d+f 54, b*f4au5rip?

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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 traveli.1pq* h bob29 qmd2uebvap)k)ng along the x-axis. The graph shown below is a plot of the car’s velocity in the x direction,buqa*.b2q vpe) 2)p9m o1kdb h $v_x$ 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 toyc. *fxzb odu:9lzioys kv8t6*v/+b0 q car traveling along the x-axis. The graph6 :z *sqo vyio9dxcb0k8u btf+/vzl.* shown below is a plot of the car’s velocity in the x direction, $v_x$ versus time $t$.What was the acceleration at 33 s?


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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  97.22: This question refers to th1cyws*elglsli) xw2 7v 40libc k8: d*e motion of a toy car traveling along the x-axis. The c1 lclw: 4 l)swi27xd*0b*sy klve8g igraph shown 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 velo8jcsflk:b tvfgc- hg,fn0)* 3 -5gpks city vs. time of a duck flying due south for the winter. At what pol ktn *s,):5bfgcg--pcf kg3vs8fjh0 int 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 posituymv0-0 6 gb n0xsz5cqion and elapsed time of a car starting from rest and uniformly accelerating in a strac0z5 u-bm0yq 0 vs6nxgight 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 refer to thv8n2m.b qlb+jd)h 5o me diagram below which shows the position and elapsed time of a car starting from rest and uhv85bj d2.)m+qnl mob niformly accelerating in a straight line. The average acceleration during the entire 3 second interval is closest to


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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.20: What is the shape of the velo9k xalcie.; .jbo1+vz city time graph for an object with the position time graph shown in the diageax.9lb1ojcvi+;k. zram 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 infof-2, h5hnvua7m :w/ogwo 2h.fbe q;x iols.-brmation. An ideal elasti hm 2f.h :qh5--u bv/7; gnolaiesf.2 oxw,obwc rubber ball is dropped from a height of about 2 meters, hits the floor and rebounds to its original height.
Which of the following graphs would best represent the distance above the floor versus time for the above bouncing ball?


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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  00.29: The following question refer to the following information. qvqj8y0,6xzpm 2gl) vAn ideal elastic rubber ball is dropped from a height of about 2 meters, hitsx,v q l8zgq6)2pj0ymv 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 af4pz vib:vl1arq5v +x hz1 77o 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 following scenajon d)*+1kxs x4zw81 u wa(euario: 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 follo eoe;p702gs e7kix 9ki,r0ewjwing 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 scenar 9-vw;gu9-rzmy( zh jiio: 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: A6lwc1octe 1dgf:qck o+0. uf *t $t_0$, 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 horizontal table top a r76 :;c wov3nqse.orund off the table edge. Which of the following would best represent a graph of the magnitude of the ball's acceleration vn:w3o e.sq6uo cr;7rv s 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 relations6i ov3x fikv41 iv; nqp2*:a.flb:hmbhip between distance and time for an object that is movi*bmlvohi:: 2 q .bknfa 6p13 x4vvi;fing along a straight line. What is the 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 distance and time fx 99*+knhxqcpb du.3uw8l s+wor an object that is moving along a straight line. Between what times did the object have a non-zeropw8*h b xc.9nd9 us +ukqxl3+w 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 hei;mb4b(3y *s5v zf h-3 hynxdownward on Earth with an initial speed of 12.0 m/s from a posihv(5 z*fnb43 b;mh3-hiey sx ytion 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 rgjx -b/i2lc0igq(yvf n1pj : 0epresents a toy car starting from rest and uniformly accelerating across the floor. The time and distance traveled from lg 0b icgx0p/ -j:jq(nyv1if2the 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 from res+ ,cxym2;tqmw7,kd yy t and uniformly accelerating across the floor. The ti qcm7y,yy2t; wxk,md+me and distance traveled from the start are shown in the diagram.
What was the acceleration of the cart during the first 0.4 seconds?


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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.13: The diagram below represents a toy car starting from resz)6t jdl 4 yljcs7w55ut and uniformly accelerating across the floor. Thec zul j5 tw67dys4j)5l 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 s(:a:rd;nozffg(w re ss(g56 xhows a uniformly accelerating ball. The position of the ball each second is indica ((regxdawsf n 56g:: ;rsz(foted.
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 ac s39jwsc2ty0n celerating ball. The position of the ball each second is 0ssj9wncy32 tindicated.
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 circuszawd );;,jymp clown on a unicycle moving in a straight line is shown in the graph below. y dpa j;m,z;)w
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 s1tq,d,03zpy6q ajkexv+ n2 hqtraight line is shown in the grneq z,2h6qxq av 0 pjyk,3+d1taph 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 inl9knb-/*tkn;b:q)pph +tk 5xdjb86 9ryumz b a vacuum near the surface of the earth

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33#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.11: The accompanying graph describes the motion of a marb9*c(it gr;*a jbzvc +tle on a table top for 10 seconds. For which time intervt*r+(czb jciva;9g t* al(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 um+h k/c) xuz7m;ipc9motion of a marble on a table top for 10 s+/pumk7m x; hc)cuz 9ieconds. 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 motionvh3 bxt-p mb;)+ ;dgxh of a marble on a table top for 10 seconds. What is the marb)hgp vt+h bxdx3;-b;mles 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 tl2 .sy34 (t34o v3kvdzmvneivime 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 sa*ocpb (3 fitujmg 5-4peed 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-p kl*c6gq+tm motion of an object l*q+mtk6g cp -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 describes the motion of a toy car acrossa-d+ sz urshz cyr,4*-z he86w the floor for 10 secondsuazc8y-sr6 h s4-,h *r wd+ezz. What is the 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 motio rnu4rka )-a7in of a toy car across the floor for 10 seconds. Wukian)4a r7r -hat 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 ss;thaz3 w53o2/( 4 kuxf fpramotion of a toy car across the floor for 10 seconds. At what times or time intervals must the net force on the toy car be zea(pszu3rw 3a 4/k5 ox;fhf s2tro?


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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. W v:jqg/zh2hf)jt b,8v hich one of the following choices best represents the acceleration of thb gvjf)v z2j,/h:tq8 he 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 curvkat3yn;2*/ 1ttfb 5ulv1 nuetz*r*p fe shown. Which of the following statements regarding its motion is NOT CORRECT?npl zbuf5 t*r/ut1 *vf*1ytt ;k2 en3a


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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 aloqa kpr4gq- o y21+v/dfng the x-axis according to the velocity versus time curve shown to the right. When does the car have zero acceleration? y4 +kp1/drqv2 f qa-go


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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 j8e,e t,q7tgw2o d1gbbetween the velocity and the accelerat tj2o7e 18,wb,g teqdgion 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 traveling toxn-mb0n16-y dkhk f4qward each other.xnfn-dq ky14hk06 -mb
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 posi.-kdokk m5rrw*mkb 6 :tive and incre -:kdkrm.w ork5 6kb*masing

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48#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  07.12: The definitio ro12i6-toi bqn of average velocity is

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49#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  16.18: For any motion in two dimensions, which one of the following choktymi),c:9 ge b8kvx 5h1uh+kices identifies quantitie9: g5bhcxivhu yk kkm)+ te18,s 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 movesb: wvb;n8 z4mj $3.0\;m$ 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-tir13d2 nmld v8jme, $y\;vs\;t$, 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 s1 mvhtng)8vj;9ci x6 time T in two p g j1x8vmt;c96v) hisnarts.
• 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 3 xlwm yh+hl*ke90w:xon a straight track is shown in the diagram. The thick line represents the velocity. Assume that the car starts atmyw3hlx90e +wx :lk*h 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 fo p2e:g9vbb. cqr the motion of a car on a straight track is shown in the diagram. The thick line represents the velocity. pq2b9:gvbe .c 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 moti* hj:jc 4a7ytjkffps/v n4+hz6d 5cvszl5 5j7on of an object given by the position vs. time graph shown. For what time(s) is the speed of thejs scpj5nfzcl7 hkd +za45h4vj /* :6 5yvf7tj 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 s3hiaj1tt3 . dc b:umz-hown. For which time(s) is the acceleration of the object equazt m dhti-.c1: 3b3jual to 0?


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57#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.24: By computing the area under the acceleration vs. tyc.z0kp rbt)2 fk-7mu ime graph for a fixed time interval of an objk0pytcbmr )u. -7z2f kect’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 -dw gsg*g+k -xj(q)k lline 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 afo zo-3gyl7g6 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 rea3y+sa0 mr:l)9yaadcxr6-w5hq sd-xr ches 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 ream.we g0 1*m5u3,shkwcoy, v4 azoh,iaches the ground in a time of $2.50\;s$. Neglect air resistance. From what height above the ground was the object released?

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62#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.17: A position vs. time graph of a particle moving along a horizontal axi) pzdw, w2ts2q-d;m fbtqf.6gs is shown. What is the total distance td gpmq) ws-6w ft ftbqd;,2.2zraveled 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 correctluccx r8po1z y*b p2r:/y identifies all of the listed situations for which the*z1opb2y/ prxrcc8:ure 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 a5wb5:3ke npn e zlqyz5 dj*38o/d.ldobject moving along a line is shown. The object starts from rest at time t=0 s. At what time(s) does the object attain a maximum displacement from its 5wza5 zndle kyb n:.o35 d/8jedlp*q3 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 i j/xjnn l9:o(76xi cndh)g9dtts velocity along a line vs. time is graphed. Which one of the following choices best gives the proper interval(s) of time for which the object is moving away fx9 o) c l6/7d:nt(9dxhnijjngrom 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 mo+ky22j svh) toving to the right on a horizontal track, each with constant acceleration. At an instant of time, the information about the ) +2v oyjth2skcars 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 pos/gcq,i p h 8 yoh3uty7+qfe24mition $x$, 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 u)fsai) i/ pdrtfhoy( 0+et/: graph, which one of the following choices correctly describes the relationship between the average speed of the truck to that of tu r:)tfy soii+ h/(eat 0dfp/)he 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 follo2d,(0hn o8l/+wf: q ebsusnsuey2,1g1nz jncwing choices best describes the instants of time, at which the car and truck travel with the same speeh,,dso gzqb1seyn2nuj f2nlns1e( c0:uw+/8 d?

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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,vgw65cxy8;f6o1 (awdd - vwqg each start from rest at the origin and will move along the x-axis. The acceleration vs.-vvxdfcg 56 8d1o (w6g;wqwa y 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 of an object moving on a hori9igh 9if rnfv 1*grgdmy2m;c ,tv27 v8zontal line is shown. At what time(s) is the object moving with its greatest speed cv m8 i;fvrg9t7igrng,d922 yf*1vhm?


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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 zkm2gkse-j*a 5- (y.eco*l yz-fzq-dgraph provided. During what time interval(s) does the mas-j-mgf* y ce.(zd-kqkz z-* olsa5ey2s have zero acceleration?


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