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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 paab3xd l/ v)pq.bov )6ath 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 witp*lfy;2h b1dqqgox ;.hout reference to a particular direction is calledlq1hx p*;q; gdy f2.ob

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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 circularbldxmk;e+l (rv;3uys 8mz 85 f track at an average speed of 50 m/s and then coum3;ekdlsr 8v mz8b(+ 5y;lx fmpletes 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 n vto0:9(l axmljb:/ js*sm)ythe constant velocity. If it continues, how far wilsly9saxn/0)(o:mjvj b tml*:l 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 station*jl,h vh xkp*5ab k3-yary on 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 lvaj3 -hy kk*,x bhp*5is 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 400 km at 1y) x y+r1hf8gyzax:2 eyu(rb 200 km/h. What is the average speed of the motorist +b r urgxey1 hy2yy2:x8a(zf)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 motcx7wlv6lvm.v * e.m 1rc (5ittion of a toy car traveling along the x-axis. The graphlrv.vm1.te 7 c v6(*tx m5ciwl 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 tr s6-:o0 o:lqw7ctxzloy car traveling along the x-axis. The graph shown below is a plot of the z-7 s:xo0 q:clt owr6lcar’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 toy3e5s*s fed nqx,jcn2 6 car traveling along the x-axis. The graph shown below is a plot of the car’s velocity3jc xn2s*ednq s 6ef5, 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 velocioqw(2r-qn mepur0(2z ty vs. time of a duck flying due south for the winter. At what point did the duck steu( 2q(2 oq0rmnp zrw-op 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 b1qludjj hm,k f-l3mdg o g);**elow which shows the position and elapsed time of a car starting frg g3dmj- ) ul*f,qdoh*kj1 lm;om rest and uniformly accelerating in a straight 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 the diagram below which shows the position ana s8 44plnrc :rzok6m;.dbww:d elapsed time of a car starting from rest and uniformly accelerating in a straw4 8rds46zra: p; nlmb. kc:owight 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 time graph for an object 70hn:5h/o ouq1fm 2 sqrihgz)with the position time r2i1hshg7qz)0 n 5/mf h oo:uqgraph 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 r +b-y xe5muwqohcn0)fsg.*x 3 efer to the following information. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the flow*g)xm-5 0qny.exfc ou sbh3+or 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 qu dra)802353hxbx j/ o f 7bqbnnecxal;estion refer to the following information. An ideal elastib xbdn0l ae x;f5/a3rn) o7b8ch32qjxc rubber ball is dropped 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 traveh 0fbadlgr(b hl9n mt60.0w m0l 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 foll yfi q sbtjr4/v.8l6:v61oo ;6ofwif rowing 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 following +u+es.0 ,xc(vrt3 ebywpvt1 z , *jkxfscenario: 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 scenario: At 8d:iw i rrwmuf.v) h;d3g*p4cfbl/4x $t_0$, 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 sc. v3h+1qrne hvzl5aampb /99d enario: 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 rolczxi-/4(j oopo d.s6 xls down a ramp, across a horizontal table top and off the table edge. Which of the following would best r6x.spo( icjod x- o/4zepresent 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 relationship between k-9i+ pb 8xewfufa7(x distance and time for an object that is moving along a straight line. What is the instantaneous speed of the oi 9+(xapfkfeu8 7xw-bbject 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 relky +bi:iq 2y/iationship between distance and time for an object that is moving along a straight line. Between what times did the object have a nonb2iyk/i+i yq :-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 on Earth with an initia0yc w *hs:6a(nlcla-rl speed of 12.0 m/s from a position 10.0 m above the ground. Ignoring air resistance, the slw0racl6ha:*ys - n c(peed 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 beloh bejk+7vl(ivlbqi.rx5555 m u.c 1d hw represents a toy car starting from rest and uniformly accelerating across the floor. The time and distance traveled from the st v.5lh71( ib. rlei5q5j x5 kmuvbh+cdart 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 frqc-7o-f(zwnk1pk ( q ws:osz-om rest and uniformly aw ok (-np-s7-zkcf1 (zqoq w:sccelerating across the floor. The time and distance traveled from the start are shown in the diagram.
What was the acceleration of the cart during the first 0.4 seconds?


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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.13: The diagram below represents a tod)i z pvtv b-v4jfqnt9 ,w/* khch)*+ay car starting from rest and uniformly accelerating across the floor. The time and distance travele )d,+ jt*akznvih)/pc* hfq4- 9vbt wvd 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 accelek4t3dv 8-k 9+be v7rcx,cgdpq rating ball. The position of the ball each second is in+ g,c-c t4rxv78k3e9pd kqv dbdicated.
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 acceleratinx0pmd.r d8 k/fol6 u7ftxx, zb9.n j/o1u: sttg ball. The position of the ball each second .7uxotfp j:b0x fr 9./dtzmx ,lko 618n/ut sdis 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 )49): ylf64z w((jhcembw3ns wvdhk b is shown in the graph bel4(zmw(y3 s6e ) lch:wvnhfdb k4 bj)w9ow.
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 akvx*o,epsqf; /x -h6u unicycle moving in a straight line is shown in the graph below.v s;eu*x 6pk-hf o,xq/
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 2q* gw.6g3 nl.mbcjdpnear 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 marble on a table top fo9xuiozl z 0 ,wlvt.b2*krf p nmdj3(*(r 10 seconds. For which time interval(s) did the marble have a neg*b 9ir0pnf*zjutl,o 2.v(k(3zdx lmw ative 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 motioo 5 )bqwuc:y1xn of a marble on a table top for 10 seconds. For which time interval(s) did the marble have a posiqyxc )uwo5 b:1tive 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 m jfu(f m6ucm: 6q7jo4farble on a table top for 10 secondsmjf7 ufq( 46cj: fm6ou. 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 acceler 5yq1xwu9;r4,idmm)vmmr .f jates uniformly from rest for a time of $2.00\;s$ through a distance of $4.00\;m$. What was the acceleration of the car?

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37#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  16.06: An object, thrown straight down 7:b0fjvlt4 ayward with a speed of $20.0\;m/s$, takes $2.00\;s$ to reach the ground below. From what height above the ground was the object thrown? Ignore air resistance.

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38#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  04.03: Which of the following graphs( e3lb z e+u0chemde(4 could correctly represent the motion of an object moving with a constant speed in a strahdm4u(lcbe (+ze ee03ight 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 descr2gy2 w azkb ubsc-5t ,gz76ku*ibes the motion of a toy car across the floor for 10 seconds.2,w*c5ut2gakbu gs zyb 7k -6z 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 graphdl+ .r/ua )7ejrd .(nimzf1ep describes the motion of a toy car across the floor for 10 seconds. What was the toje( pz ..lnd7rf dr 1e+i)uma/tal 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 gswrx7 pbh4p5tcf06, 3 +o ivbthe motion of a toy car across the floor for 10 seconds. At wha ,ibr6p53 gx+7hcs4bvpowf t0 t 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+95gxfk qrzzgf:n+p 0 0 km/hr to 60 km/hr in 4.50 s. Which one of the following choicexzz+q f 5:k9r+0n gfgps 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 vers m+knhyo/m n17us time curve shown. Which of the following statements regar ky 7/ohnm+n1mding 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 according to the velocity ve,9*h pc rr:ij:f fw7jnrsus time curve shown to c rh*i9jf :7 jpw,frn: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 tbdcz*t 9jenqq(4)n3hj pl/.wp4l ow/ime, a tennis ball is moved so that the angle betwee(o4)9qt*pn4 /w nbzh .jc/lq pe3 wljdn the velocity and the 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 kirlq5g wu;1od0 lometers apart and traveling toward each other.rq5l10 u;gowd
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 acce68lk)ar;x k.cv(k e jgleration is positive and increvjkk;g xc.lk(8a 6)reasing

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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 average velhxdl(h+)oh h- ocity 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 dimenx087( rxdq4+hqqewxxsions, which one of the following choices identifies quantities that must hq8hrx xq0w4( xxe7q+ dave 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 move7,b1dn j*nsr as $3.0\;m$ 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-t)i )rcn)ln 2psh,tu i;uteq4 6ime, $y\;vs\;t$, 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 dfumn:9t t)n m*b;jc-q:iwr8mc .13w mpii* kthe right along a one-dimensional track for total time T in twoj c*98imun i3qb.diwpn)mw :*c1tm m:ft;- rk parts.
• 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 ccs) n ohe8s5l,ar on a straight track is shown in the diagram. Tsn,o ce)5sh8 lhe 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 on a straight j/di u,w1 h3)at y 4srxz9pbvn: junik)af+93 track is shown in the diagram. The thick line represent,4 uw+h iv/)39b fa9dx)ia 1urjszj k :nn3typs 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 motion of an object given by1nbm. (2e,gqzc3 shgvkd h33r the position vs. time graph shown. For what time(s) is the speed of the object greate3v (bhc3h2,q1 3gs mznkg.r edst?


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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 motb 9nhh2*r3uy:tvs7euion of an object given by the velocity vs. time graph shown. For which time(s) is the acceleration of the objects7ur*n3et :uh9hby2 v 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 area unde(x/ 2eca1*a 2l lzdvjxr the acceleration vs. time graph for a fixed time interval of an object’s motion, what quantityj*l lvcexa/d2( z21ax 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 r90 .fjezh49tyc7 op za horizontal line with increasing speed.
choices could represent the signs of the velocity and of the acceleration for the object to achieve this motion?

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59#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  11.14: A car makes a trip in two partj ytl y/c6d 2..qetvj(s:
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 rr a t3v /r:z1 bvm82/ya/jkoweeaches 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 r*/ps +us/ w tfaf2,s,fhi;ojkeleased from 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 graph of a particle moving along a horizontal76xpttzmz)c-(,ip pc axis is shown.,it c6zm7)c- (pztpxp 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 t3vkll5)o 4i ilnn:h.n he following choices correctly identifies all of the listed situations for which there is a non-zero acce l3k)iov nin5.hl:4n lleration?
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 )ekye0w7 um o4zise3;a line is shown. The object starts from rest at time t=0 s. At what time(s) does the object a zsw oeee u0y)3;4mik7ttain 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 the3,vr we a7u1vcdm1v+ e origin and its velocity along a line vs. time is graphed. Which one of the following choices best gives the proper interval(sv+vuedrw1a3mcv 7e 1 ,) 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 mo*)7ljp;u5cfl jfssib4 h19 mwving to the right on a horizontal track, each with constant acceljfj )uhl57s b9smclp;1iw*f 4eration. At an instant of time, the 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 pob m8juzdxu1)e)r6i ;x) u2hg1i3 .yeovtr8 qpsition $x$, 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 shobct y15y7jh; mwn in the graph, which one of the following choices correctly describes the relationship between the average speed of the truck to that of h1bt7mcyy;5jthe 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 9 n ys+,ax9jylinstants of time, at which the carl,na9s+9j xy y 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 start from re eshfrv07z2 ymmtu: a3c k/7e nr399pnst 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 p:2cnur e3tvka7erfsyzn 9h03mm/79 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 horjnz 4*hv,97x j.ut mhqizontal line is shown. At what time(s) is the object moving with it.njmxu* h9jz47v q t,hs greatest speed?


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72#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.08: A mass moves al;0nseq/, tqcw ong the x-axis following the position vs. time graph provided. e0q/ntq;,cws During what time interval(s) does the mass have zero acceleration?


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