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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 vb ;2fht -dr 0e /p.yxxr1ab-ua constant 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 dif5umh 1zcnogzqa(x 4h1h +(os: *3pe pstance per unit time without reference to a particular direction is hhp zf oa szgc3(1p(41o n uqhm:e5*x+called

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  12.29: A vehicle completes one lap around a circular track at an average speed oxspa3j20sr5 of 50 m/s and 3p2or xsj 0s5athen 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 velocity. If it cont57o g/ u.zyqu; m-irqpinues, how;p/mu-guyz5q .oi7 qr far will it travel in 3.0 s?

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5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  05.34: A 40-kg boy is stationary on a 30-kg plank that is sliding at 5.00 m/s tosh;3 x*8lzvemz4p x 8a 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, relativezslx883va pzhx* e4;m 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 400 km at 100 km/h. What .k)j0aakst,+n q z-.eacrt. cis the average st+,.q aakn -sej.c) t c.rakz0peed of 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 rah) l)j,l*y5 w kohs1mefers to the motion of a toy car traveling along the x-axis. The graph shown below is a plot of the car’s velocityohl 5 y)aksmwj1hl ,)* 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 traveling awzjqzju+1 b6+hvf1b x2 5wzjx ) fg)k.long the x-axis. The graph shown below is a plot of the qj.z2kwvh5wx)b juzbfg )+x+j1 f61zcar’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 vazo:oxfes (jg* pz74/j3gd6the motion of a toy car traveling along the x-axis. The graph shown below o4p(xa j7fz/vzse*63o:jdggis 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 graphpgfd *n)3o u)l of the velocity vs. time of a duck flying due south for the winter. At what point did uflp )n) 3*gdothe 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 sn.o0tpa, e3ce wqi3/l hows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. What was the average ve0c,lt3qe aop/e3 in.w locity 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 7;b z)hdah rs9shows the position and elapsed time of a car starting from reszh)shr; 9dab7 t 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 time graphq(j ln)wns;:7yi t94 ris q6zf for an object with the posit (sz7qf rtni;n6ql wy)j:i49 sion time graph shown in the diagram at right?


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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  00.28: The following question refer to the following information. An idealqzq/ i8p-d6bw elastic rubber ball is dropped from a height of aboq wdp/6-zqib 8ut 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 quew1 e3q6yjy f ko4148dcqi +dkjstion refer to the following information. An ideal elastic rubber ball is dropped from a height of about 2 mc 4 okfkqyw811 63qijd+je4ydeters, hits the floor and rebounds to its original height.
Which of the following would best represent acceleration versus time for the bouncing ball?


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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  00.39: If a boat can travel with c bgq w0zmz;jo*q1vfq6 :zf4(6ot ye+ 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 r)gpqd, 1,g.9sksess.unq. z cefers 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.
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 re s f.sl:41kxvwfers 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 fo zh/(hf 3bj+hkllowing 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 t+meh)oxqwx h7- gubki.6a)l3my 5: ndhe 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 horizontal table top a*c80 ewf zs (-t(g zm1xdb.zhznd off the table edge. Which of the following would best represent a graph of the magnitude of the bac dzgs(t 1 h-zm e(0z8fwz.b*xll'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 th44wy.ntb.h3810 ln dpp p6o5iu cxhane relationship between distance and time for an object that is moving along a straight line. What is the instantaneous speed of the object at t = 5.0 secotn4i.3pny.np6ch poa 8dw5xhu 1l 04bnds?


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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 d8t as,aa9 2gaxistance and time for an object that is moving along a straight line. Between what timexagts9a,8aa 2 s 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 on Earth with an initibpwomx v mr(6mpy4 p-01z 1wsx)l) :eoal speed of 12.0 m/s from a position 10.0 m above the ground. Ignoring air resistance, the speed ofowpzm0 belo)xp4)16 s w:1mrvy p(m-x 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 cu**p5fvn* eylar starting from rest and uniformly accelerating across the floor. The***y un5felpv 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 represents a toy car starting from rest and uniformly gt04vf*p , lvcaccelerating across tvt g4v*fp0cl,he 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 toy car starting fg291oun8 ip3l pmdnk2 rom rest and uniformly accelerating across the floor. The time aogni2pmlpnd k2 u8 193nd 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 accelerating ball. The position of the bal sx vp) kzu-ea/wh,i62l each second is indiczi ew uph2) v6a/x-,skated.
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 unifoq18y- w: nbvtypt3f+ jrmly accelerating ball. The position of the ball each second v: 1yp jb+qt nwty-38fis 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 lid6.zn3eyde5ayd 0x4z9 /wsn- k+ (qb n0zvxjvne is shown in the graph +4bs3vdxez qn(0w /yz 9dz60dvynx.jka 5n -ebelow.
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 strai3 uy+cl1w oeya :q;qj:ght line is shown in y3coql:j: au +ey;1 qwthe 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 thp y8lo27qcn3xf o2ij11q z5pbe 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 describegw +tj:;,u8tra j 2x 2flvmnq0s the motion of a marble on a table top for 10 seconds. For which time interval(s) did the marble have a negativftmu xga;r q8j2,0vl :+t2njwe 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 motion of a marble on a table towb92afkx rq;jtn6: m.p for 10 seconds. For which time interval(s) did the marble h9aqfjn 2xm;rwb.k :t6 ave 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 j;b80pa2j7q-x t ui; 6bdey nemotion of a marble on a table top for 10 seconds. What n 2it 0jqx 8p;dubaeye-j 6;7bis 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 for a time of vehjs 2,kz4 75pg ;wyf$2.00\;s$ 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, thrzr/k/ywho p28own straight downward 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 )ukh9qsdn2dex;: )j t graphs could correctly represent the motion of an object moving with a constant spethu;d xeq k2)d9):j nsed 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 des )m *3vig3 wq)n/g(9omznz kbscribes the motion of a toy car across the floor for 10 seconds. What i(9z* )nvzm)mgswq/g 3nko3b 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 descr;cs/(.rv hezm ibes the motion of a toy car across the floor for 10 seconds. Wharc mes/v ;h.z(t 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 car acro 9jq;q h3u1jytq1 n(ya3vtzo)ss the floor for 10 seconds. At what times or time intervals must the net force on the toy car btvjy13 toh; q nazq9jy( )1uq3e 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 km/hr to 60 km/hr in 4.50 s. Which on5tl7l,shk ha- (c f/ 1jpqa(gge of the following choices best represe5 jl fcsa-qk/hgap(( 1h7lt,gnts 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 followinov21ph 5 ggniw/ fo/i*g statements/von hw2/ifgg p5*o1i regarding 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 versus time cujn gb4hpt,x 7t a,ggk ,p.(/brrve shown to the right. When does the ca/bbggnx t4r7k,(g,ph ap , tj.r 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 tenke :xf //av)0csee5f nnis ball is moved so that the angle between the velocity and the acceleration of the ball is kept at a constant 120 degree. Which statement is true abo e5nsfake/:x /0)evcfut 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 cnm 69gea:h p)br*2ht150 kilometers apart and traveling toward each other.nh g2r):ea9*hpm b ct6
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 positive and in);y 8tsb lc c w,-o7gt5lmwdbx )-u)lpcre )w ;syt -lut-c)wom57dxpg) c8bb,llasing

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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 aver cd icb;p).l.j8 * pv3vsfkavl z/f/v/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 ofd 0hw *n8tunp rd:rirn95)d f; the following choices identifies quantities that must have the samud8 5nnt0i)*9pr; dn:fh drwre 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 movg:l-hdoqyoi*l8 :s52b4 qfkxh t xd83es $3.0\;m$ 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-timooo,vc yxte /2rx k(-g2;9mcce, $y\;vs\;t$, 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-dimensio80*i7m 3lbq1ycpmdb z nal track for total time T im7 l18bmzqp db*3i 0cyn two 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 car on a straight -ww,pr-dk y1.yp y(+g:mz jdbtrack is shown in the diagram. The thick line represents the velocity. Assume that the car starts y-mwy(,d pzw-g rybjk1. pd:+ 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./ p67y n t1telo97*nqsvyrxk4 time graph for the motion of a car on a straight track is shown in q7*69nl/vrpkoeny47y xts t1 the diagram. 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 motion of an object given by the position vjbeo/bcofra3v ; ,*8z s. time graph shown. For what b zj8,fvb/;3oac eor*time(s) is the speed of the object greatest?


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56#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.11: Consider the motion of an object given by thej083m v yperc1 velocity vs. time graph shown. For which time(s) is the acceleration of the object eq 3jm 08erpcv1yual 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. time graph for a fixed m *brm/ 5 0khxezpqr(:time interval of an object’s motion, what quantity has been determined for that:(50e rqpzb* rm hmkx/ 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 alo ed wgo);sk:3qnfi1p5 ng a 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 7gx *3ca 3pruatwo 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 object1ore n ex.y+.;e+wv (yrjd onp5nbg 6zs06s:q is released from rest and reaches 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 reaches taxyw6 fgwdox5 h2s, 57he 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 grted;gl8e z,2h n+0lmay o/p2c aph of a particle moving along a horizontal axis is shown. What is the total distance traveled by the particle from t=0 to t=1e o/hnl+d8czyg2m e p;0alt 2,0s ?


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63#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.18: Which one of the following choices correctly identifies a cf.hr(f,ylhu4, ai)0p0 v fr ks3xdv6sp*k.tll of the listed situations for whicxyt)k 0rf43riv h0*6s,ppd .f.ucf l k, vs(ahh 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 acceleratio 7sg;m.p7wnm a3bt :zbn vs. time 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 from sw ambgm:z7.n bp;3t 7its 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 a it:2ue 2mjsjc/3 ,-nllznz*znd its velocity along a line vs. time is graphed. Which onu/ill2t-jc m3nj zzze2 n:,*se of the following choices best gives the proper 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 hork+ 1z.qfaq.c kizontal track, each with constant acceleration. At an instant of time1kf.a+zkqq. c, 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(y129 vyynewt a position $x$, 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 z/ kcmc6lt(s:d0t iw5exbs * 1graph, which one of the following choices correctly describes the relatio( x6 5 w0*sl1ic tc:kzmet/sdbnship 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 the following choices best describesqynd)hr u;),ztvw2+k the instants of time, at which the caz kqd+,uh v)nt)2yr w;r 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 ; *bampb8zcagk;+pn1Q, each start from rest at the origin and will move along the x-axis. The accelerazn;m+b1 apa; gp* 8bcktion vs. 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 gr7y xg2 t7)gex897e2 6mqv ima6k fqfbiaph of an object moving on a horizontal line is shown. At what time(s) is the object moving with its greatest spef82ay7x6k7)iqgmifgem9bevx 6q 27 ted?


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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-ax2 bu/tl-(p)ujekv pm/ uz6 f-ris following the position vs. time graph provided. During what time interval(s) does the mass havekv-6 -2 zflb pt/epu( /umrju) zero acceleration?


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