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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 constant speed around a circular path of radius b9 d9yciu5956e7/d+l bb0imr wwdvyq$R$, 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 c -g hs7b9+k;bu-ho.5elf ww0, ohmngar direction is calls h h9ew.l75h,fw g+og;-onkub0cbm -ed

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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 7yiz-2yy hh5abp0 +xrlap around a circular track at an average speed of 50 m/s and then completes a second lap at an averagexhypz+b -y2yh r570 ai 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 veloc*-(rxl9r 0pni o/tw voity. If it continues, how farrloon-riv09 wpt( /x* 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 6+sfdz 2hxw 94sl4k auon 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 ratealhufxs s2z w44k69 +d 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 rn7br q- bgp14bm a9s6l q4sh-400 km at 100 km/h. What is the average speed of prsq1 6 b4hlm7gb -sqb4rn a9-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 cakw / o8iomp8jbgv..samo+6 z6) g;yqi r traveling along the x-axis. Theqo 8k/jv saypom;bwm). g+ 6o8.z6i gi graph shown below is a plot 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 travelinsyz1iq :40w a,yi)f6lagq 2h lg along the x-axis. The graph shown below is a plot of the car’s va:zh,ai 2 1wy) if l6q0slyg4qelocity 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 theaouhly8kqkt9v8u 7 92,2nu+ xxf m n:j motion of a toy car traveling along the x-axis. The graph shown below is a plot of the car’s velocit27 tjxmnnou998uyxu kv,hl 2 f:q8a+ky 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 flyyme hql.l7 s, 1s/hi/0oxtye: ing due south for the winter. At what point did the duck stop its forwars,7/.mhtl0 s xhl /eiqyy:1eod 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 diagramphv.xwm * 22g,d7uz lc below which shows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. What was the average velocity of the car during thv2 zw,x*lm pd27ug.h ce 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 sho:xqhip*iao ;zou.* )q ws the position and elapsed time of a i; *:qph*xu.z aqo)iocar starting from rest and uniformly 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 velocity tiwzcy:0 9saav :oem:j5igoe/i/xwk;/ me graph for an object with the position time graph shown in/0 vks::xijeywoz ;c g9mea/5ia: ow / the diagram at right?


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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  00.28: The following question refer toqbl2 h208-e pw ykw650k l e3apqyda*j the following information. An ideal elastic rubber ball is dropped from 3wyj6a qhe l-ydw00ppa2k8b l*2e5kq 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 refewykec bo/,s5. r to the following information. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor and rebounds to itkw /.sbc5 oye,s 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 w0ha v0o u87n 1gt8ye;2g tjgvwith 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 follodhx o 0m-bi2nl+t pt-;nkk6 k8cn8:c-maz yc 7wing 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 referf.w.d 6y:nkiw nbmzr 13a*zlg kw20;vs 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 r,naojm7y/x 2b:mgvz4 /ywq. jrvw(8l(gttz.efers 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.
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 scenaxa+su ry 2x81tpe(: wrrio: 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 do80tz )/oy g:67kxqxrh 9x4czey la8tkwn a ramp, across a horizontal table top and off the table edge. Which of the following would best represent a graph of the magnitude of the ball's acceleratk o q/xz8z4:x)7kexyylg908c6ha t rtion 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 relationship between distcg6m-98(chc0 2wlt7yg ry qa wv1 6lwfance and time for an object that is moving along a straight line. What is the instantaneous speed of the object at t = 5.0 secong- 0 cyl9vhw1c(wytlqcr 6wfma8627 g ds?


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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 relatd- x z.8-5a dztygifr*ionship between distance and time for an object that is movi* z-y. dfr xtg-5i8adzng along a straight line. Between what times did the object have a non-zero acceleration?


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24#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.07: A small object is thrown straight downward oy8+ymme.upxrt)8y3z n Earth with an initial speed of 12.ry3 puytm m8x.)8yz+e0 m/s from a position 10.0 m above the ground. Ignoring air resistance, the speed of the object when it reaches the ground is

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25#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.11: The diagram below represents a toy car starting from rest and uniform:ze+gt4zrfd3 .re uc59xcm8jly accelerating across the floor. The time and distance traveled from the start are sho:degtc3. 8rcz rjf+45muz9xe wn 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 rest and uniformgy,ww3o, n5 fzly accelerating across the floor. The time and distance traveled from the start af5nyw3g, zo, wre 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 representy xnm we6/ :udy7,n:oeao .rust)sj-:s a toy car starting from rest and uniformly accelerating across the floor. The time and distancew-,judyxu)n:r:/ ote .y6 sn oe7a:ms 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 h (p4yvxr1s 2:wu;c7bss3xan. The position of the ball each second is indicated.s:axcpsn3wvu(rh y41 2bs7x;
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 ball. The po- -jkl5qtlqb 3sition of the ball each second is inbq-5 -kl 3jqltdicated.
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 unic*jo,parvolv5f z0 :)g ycle moving in a straight line is shown in the gv)fg *a:l v5projz0o, raph 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 cir pb3wj/go+mx;wqv 2(ncus clown on a unicycle moving in a straight line is shopmq (bxvo n/wg; 3jw2+wn in the 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 tfsh3;h7 sax9ihe 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 grapz(6nlw.lta ) qh describes the motion of a marble on a table top for 10 seco 6q(w za.tll)nnds. 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 7 pe)1.jgw0ziyh;5 v3dwavsa motion of a marble on a table top for05 7w;wi)vyajs eap1.hd 3zvg 10 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 accompanyi*l(e1 qt 91aoyqjy3 xsng graph describes the motion of a marble on a table top for 10 seconds. What is the marbles average acceleration between t = 3.3 s and t = 3.8 q3 ex*lo(9t syj1y1q as


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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 - x5smqz +diy87gzka(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 straight downward with aw qah.j3tw57(zeci lu- .b/hmm l-be1 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 h/wn -f+l3r thwhu4cu,p f 1*v(whky(correctly represent the motion of an object moving +4*yw,w cvh h/3k(r(n-hlwfu fu th1pwith 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 motionbu h,ua1 mr 5oq:t*vaz1:o*rc of a toy car across the floor for 10 secon * zr5bm: ucoahv1r:*ua, qo1tds. 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 motion of a toy car across uvsxb7:44 jy(jza ag) 2zjtwhqs21b+the floor for 10 seconds. What was the total displacement of the toy car for the entire 10 second interval shown?a1xszb vj2t4uh+qzjj:g 2 7a) y 4bs(w


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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 car (f jyrz21 9pg7j+4 k7xmnwoux across the floor for 10 seconds. At what times or time intervals must the net force on the toy car be zerjwm2 g o (fz9r yupjxxk774+n1o?


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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 unifo9p-vada rs )0qrmly from 0 km/hr to 60 km/hr in 4.50 s. Which one of the following choices bes -r9aq dsva)0pt 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 following7f q:*+1bvhhc qscj3vbahs,+y v .+ir statements regardin+sv7:1cj,a hrq vb++hcys h3 .vif*q bg 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-axis accoro19lj z-+x 56rzfg2iai aa vn(tkam (,ding to the velocity versus time curve shown to the a(z v1x9+5a (lf r,ik oajzmt2g-i6an 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 o*i)e/: ,tsf.yam w; rpr/vq svf time, a tennis ball is moved so that the angle between the velocity and the acceleration off .v :etyqvs iwr/p)* ,smra/; 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 v/9hiplrl)b 9 a) z(bnother.a9v(lb /p9rlz i) b)hn
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 onm py z2mo(72lq the x-axis. When the acceleration is positive and increoz 2m2q lpy7(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 definition o08ds 1r12h (qlsfomm9cb rw 7ff 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 dih) orab rrq h ujw9u:nf3/5kf 4;u4z5w ih)7bumensions, which one of the following choices identifies quantities that must have fwkb)) huj;: rb55hr4uwi3ru a of497hnqu z/ 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 movj86gq7,gc*zjadgl :g z2ne)dr0s d5e es $3.0\;m$ 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-tiju .fdc, -yt r5uz2 t43uvgl9bme, $y\;vs\;t$, 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 t+efy e: ;tyk-ghe right along a one-dimensional track for total time T in two p y teefg:+y-;karts.
• 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 vsv2xegd+dki6* ka*7mh. time graph for the motion of a car on a straight track is shown in the diagram. T* xd 67igva* k+2dhemkhe thick line represents the velocity. Assume that the car starts at origin $x=0$. At which time is the car the greatest distance from the origin?


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54#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  08.24: The velocity vs. time graph for the motion of a car o (2ipy-llrwx(whkw c 5c /z:+cgx0 t;fn a straight track is shown in the diagram. The thick line represents the velocity. Assume that the car startscc(x0l-( igkx;:f w+/c2pwtrz hylw5 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 anr 03aus+ihaw z.+p tl6 object given by the position vs. time graph shown. For what time(s) i. r6+twiashl p3+0uz as 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 pcybgxkv98,sn* 2 vw. graph shownn. kx 9cpy8s vbv*gw,2. For which time(s) is the acceleration of the object equal to 0?


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57#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.24: By computing , ac62h ,/ttv ctd*nfnq gs34gthe area under the acceleration vs. time graph for a fixed time interval of */c3d,sg2q4a vgthftnct n 6, 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 wi o;),w 4x;3d lowegdjyth 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 tripmp ax/wxndty; 01.3rwvx o)5u 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 time o-i /7a2u 9v3vx qsyd a7xxk*dnf $2.50\;s$. 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 reac8yumfr* 6+aovp*1qbr 0fugph .)+gw rhes 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 horizontalbzgmjd (ezh,z+wd5 xwm( 5u+/ axis is shown. What is the total distance traveled by the particle from t=0 to/+hzzwxm, ( g+ mjw55du(ezdb 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 folt/e ):z yre9mj* mmoy0lowing choices correctly identifies all of the listed situations for y: )/ mrt0ezm oyej*9mwhich 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. timejsubz/pmac2 f4jy 9)/k- ry2v graph for an object 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 fbzjp9r2 y /kyj42/uvfam c)-srom its starting position?


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65#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.17: An object starts at the origin and its velocity along a linexh406rj pu qi6 vs. time is graphed. Which one of the following choices best gives the pr hxq4ip6r6 ju0oper interval(s) of time for which the object is moving away from the origin?


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66#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.09: Two cars are moving to the right on a j+uwi /7,fwc-yrxfe*vj(j 9() gmqf dhorizontal track, each with constant acceleration. At an instant of time, the information about the ca,mjg )rfx w-iq /*f79+cfd(ewvj j(uyrs 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 positi-;xu31*;b zplezogwv on $x$, 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 onel1h43x/avb x c;ww,i, :itk ae of the following choices correctly descxhkb4 :al,x3a w/ wceivti, 1;ribes 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 h 52 avxmo-2et;ltvm+the following choices best describes the instants of time, at which the car and t25;2+v meth om-avxl truck travel with the same speed?

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70#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.30: Two cars P and Q, each start from rest at the origin and will +mmx7g*n v ip hfsab(r6j;(1dmove along the x-axis. The acceleration vs. time graph for each car is shown. Whxf db(m(*1m;i as+ghv n 7pjr6ich 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 )/y4o*oz zxr shorizontal line is shown. At what time(s) is the object moving with its grea 4z)orys/zo*x test 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-axis following the position vs. time graph pro jejorjv28) d.*rgr k)vided. Drd ge2vj)8)*jjkrr o. uring what time interval(s) does the mass have zero acceleration?


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