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习题练习:Physics Bowl by Topic 2: Kinematics - part I General Motion



 作者: admin   总分: 72分  得分: _____________

答题人: 匿名未登录  开始时间: 24年03月31日 09:50  切换到: 整卷模式

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1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.10: A particle travels at a constant speed around a circular path of7 k(pn;+wr.hs md8*yv rcy 3-k or4vdd 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 dop98upt, aq x,istance per unit time without reference to a particular direction is callpop qtu9 a,x,8ed

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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 larv+-jnu6q i b- (cmca;p around a circular track at an average speed of 50 m/s and then completes a second lap at an average spee+mc r6ani -cbvq;u-(jd 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 . smy5/no7le ain 1.0 s at the constant velocity. If it continues, how far will it travel in .omya 5ne7/ls3.0 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 stath, arh-uro gks51x;czt3), m-o b9biyionary on a 30-kg plank that is sliding at 5.00 m/s to the right across a frictionless pond. The boy then )xb ,azu--obhc,1 r ohg;s mi5 r9t3ykturns and starts walking on the plank at a rate of 4.00 m/s to the left, relative to the plank. What is the speed of the plank relative to the pond now?

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  97.18: A motorist travels 400 km alg / 6 :l4yrtyfggby6*t 80 km/h and 400 km at 100 km/h. What is the average speed tyyl/rf4g *gbgl :66yof 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 thq1y- iq qc*ytixl)fq*n/.( c se motion of a toy car traveling along the x-axis. T tqf.)ly-(qi*cn/1 qc siqyx*he 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 kvk 2;tqx.o6rwqe es5w6ir 8: refers to the motion of a toy car traveling along the x-axis. The graph shown below is a plot of the ca:vweqokk;8 irs66x.2re5wtq r’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 questiona shz j xqgo9)21;+zdl refers to the motion of a toy car traveling along the x-axis. The graph shown below is a plot of the car’s h +2)zxz s;1agdoq9ljvelocity 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 6 xa 4nqu64elfod3 2vrvelocity vs. time of a duck flying due south for the winter. Ad2al o u x44rq63fve6nt what point 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 ay/k1b8(ar 66qv v jvxwhich shows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. What was the average velocity ov16k bjqax(vy r a/6v8f 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 re*2pal.l9.+w fo giqf+;pyla kb. .lcefer to the diagram below which shows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. The average acceleration during the entire 3 second inte a .l.p+ge ai.+ w9ly2 ffbpl;clq*ko.rval 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 wi m8x/y w3fvabf :f2abwhx-. g:th the position time graph shown in . /ava2gbww ffyfxm :b-3:8h xthe 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 ideal e4 ld(ivlg4;h6bfye h) lastic rubber ball is dropped from a height of about 2 meters, hits the floor and rebounds to its original heih4) d4y fhe6 lv(;blgight.
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 quesco o )l7s0:ylqtion refer to the following information. An ideal elastic rubber ball )ylqco0l :7sois 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 travel with a speed ofuj:ib ym5o89 i $v$ 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 tuyzp18+jq(14 p uxpj uo 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 refers to the +7 pr7w8irxx9 esr7gc)tb a9k 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 following scenario:v 4ivuhpc d z9ziura-9lm8(0. 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: At 8chm 44: o3ioykoi3j+lya+tq$t_0$, 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, acr *j).kdqyija h mlk)21oss a horizontal table top and off the table edge. Which of the followy.1*kij) qmlh2ka) d jing would best represent a graph of the magnitude of the ball's acceleration vs time?


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22#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.01: The graph represe;t ((hc*/*wvtkfsn awnts the relationship between distance and time for an object that is moving along a straight li/*nt( ;*wfhtwk(c avs ne. 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 relation.jlms :/icsykhxc )03 ship between distance and time for an objeck3s0j mh)iccx /l:ys. t that is moving 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 strsvt5vk a( 7j85yuf3 xh1xt6 xh2zv i7iaight downward on Earth with an initial speed of iyjfx8atuv7h h zx5(v 275tix163vsk 12.0 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 belo 3sp0xo 038exmms ayu2w represents a toy car starting from rest and uniformly accelerating across the floor. The time anm3 xso0 382ymeua0xsp d 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 bf ( (7 h+6ocqtbt/fuif,qe ec9elow represents a toy car starting from rest and uniformly acceleratine/(fb 9t6+oct,q7 f( cquifheg 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 toy carg/.z+ 1mbs xjboje:(( p3qzqu starting from rest and uniformly accelerating across the fl.qe (bjmp(qzj 1zs+3:og/ bxu oor. The time and distance traveled from the start are shown in the diagram.
What was the instantaneous velocity of the cart at 96 centimeters from the start?


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28#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  04.08: The diagram shows a uniformt91*)-tdftofe jh;bzkz-y 4 md /soa /ly accelerating ball. The position of the ball each second is indicat/y1ed/zzo*;k)sm f th-t4 f9ob -dajted.
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 acceleratini ,h 9fxo7+7omoz f*yv6ffvc .g ball. The position of the ball each zy.fhvo7cf xf v9io +67,mof*second is indicated.
Which of the following is closest to the acceleration of the ball?


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30#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.17: The motion of a circusl8 ad mjk1j6kqo4vxg .7mj94x clown on a unicycle moving in a straight line is shown in the graph beloqxljk6k48a x7vo 4.j jgmd9 1mw.
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 straigh3xc d+4yjk kbaef329 gx2pa; st line is shown in the fb 3 d2ka4+a23cpke9ygs x;jxgraph 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 the surface of thesp:.*w aan ub6 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 2c (m1p-oobdgko+1gr table top for 10 seconds. For whichg(o 2+b -k1 gpood1cmr 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 motion of a marble on a mopzwimyc dip d7t6.1r 6)ke 4c9b8l7table top for 10 seconds. For which time interval(s) did the marble have a p 76d148.9 iimp trcwc kzmpdol)67beyositive 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 of4(r ny3fil9jf*6hh6lcz w6 wp a marble on a table top for 10 seconds. What is the marbles average acceleration between t = 3.3 s and t = 3.8 s* 6phj l lr z6cf439(win6wfhy


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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 acceleratespatibm2 /h ,mcmpe6;74zzt ; ztlo0:l 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 downward with a speed of83i 6 pod*sthcuuzt/2vhx4 ;u $20.0\;m/s$, 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 motion of e/17bgif yz peuk1u(3an object moving with a constant speed in a pb(eugz31f/17 ey ikustraight 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 of2u qlq5fups 9 fp3qp6zv-3lntr0 7r( s a toy car across the floor for 10 sec67(fpqf nlt -93psl5qq2ruu zpr0v3sonds. 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 toyd+ 7ixuaju,x1 car across the floor for 10 secoxdaj, 7+i1uux nds. What was the total displacement of the toy car for the entire 10 second interval shown?


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41#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.26:The accompanying graph desg(bbc2jvmb9w vc 8v3db3je.zr+q7 q7 cribes the motion of a toy car across the floor for 10 seconds. At what times or time intervals must the net force on the toy car b7v2z(mq3 .bc +bbqrve 7wdj 938gcbvj e 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 uniformlyahe q7uj/ 7x s9rqr0;s1 zsy6s from 0 km/hr to 60 km/hr in 4.50 s. Which one of rs /0jsqu1rxey ; qzas796hs7 the following choices best represents the acceleration of the car?

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43#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  06.07: A car has the velocity versus time curve shown. Which o cw6a n4m:gw7yf the following statements regarding its motion is N7wa 4:mcgy n6wOT 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 tf+x u+ c +xkvu b1q,yc7a ga+3u*f0vjl7izjm:he x-axis according to the velocity versus time curve shown to the right.zyf 0fuxuu*+ aic+ja+q3 +kmc1g vl,bj7:v7x When does the car have zero acceleration?


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45#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  06.22: During an interval of time, a tennis ball is moved so that1 8z;4p7fh.pngyn iwviz;g emd3 ( )ym the angle between the velocity and the acceleration of the ball is kept at a const3 )ympz8;p ;nfhyvi7(d4.z1 we nmggiant 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 x ryklre1 yzn8(jg0w7(zfn-8 toward each other.r -fznr7 xkyjyenw1z (8g8 (l0
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 thef2e:9c e dhtp; acceleration is positive and incth9ede2pf: c ;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 q 0z2u9etr 0+uaqkq0nba6w*zaverage 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 ofo6 8 mk.x5ljpswx91db the following choices identifies quantities that must have the same directio8x m 9j 1koxd5lb.sp6wn?

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50#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  09.17: A toy car moves r1w vhb7fjy,2$3.0\;m$ 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-* gn m6f3h udjm4+ ylg55j0h/l e6gvuntime, $y\;vs\;t$, 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 time T .t* d hue6qid 9b(v(mcin two parts.qihdd(v ebu ctm9. (6*
• 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 akg9uy ns ;mc*(d3 nly4p ;u1fo straight track is shown in the diagram. The thick line r d1y(gnfyu s4*m pc 3;ko9l;nuepresents 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 on2z6zivf*n l3 k,9 zx(mvf n3sp a straight track is shown in the diagram. The thick line represents the velocity. Assnk(n v6zfs f,v*xlzzmi3p293ume 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 an3to;nd cch*r2yn :z:o object given by the position vs. time graph shown. For what time(s) is the speed of the obj :2tdn yrz*hc;3n:ooc ect 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 motil: hb4 ,o,/vos*y rii*1b qajlon of an object given by the velocity vs. time graph shown: bqv41o lbho r,i/** ai,lsjy. 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 thw50jjc 5eljt4o zj+0 5;i xnbt2fr hksci/5 d7e area under the acceleration vs. time graph for a fixed time interval of an object’s motion, what quantity has been determined for thjjtz5f5x4n iosi0b57jtr 50ew dcl;j2+ /kc hat 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 lin9dl8m- /hia ieo( l;p 3vrzhm0e 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 +jc,uw5e86 xd c+wyuftwo 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 releas0si sy:jpun k9b/ pt4 a*1)-ykn rv;tqed 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 isr. r/r u0thn4+:nl ttn released 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 horizontal zyx- qjc r)z-9axis is shown. What is the ycz9)-xqrj z -total distance traveled by the particle from t=0 to t=10s ?


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63#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.18: Which one of the following choices correctly i/*w8h w s.txpadentifies all of the listed situations for which there is a non-zero acceleraxwh.st pw 8a*/tion?
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 alo:hz45fybs0f70goj m .jb)f7 4 hrabiung a line is shown. The object starts from rest at time t=0 s. At what time(s) does the objec 4h r7hby5ag0fus:jo0z f4jif)b7. mbt attain a maximum displacement from its starting position?


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65#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.17: An object starts at the oridq3kbnqlx d-r;wol.r -vz. bh- e o:x-c06 )dzgin and its velocity along a line vs. time is graphed. Which one of the following choices best gixqc-.dnb; :k r-ro- qbx ezd.)6zl0wlh -ov3dves 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 ho;+h-t9jaspl ygm+ he6 rizontal track, each with constant acceleration. At an instant of time, the information about tht9-+ hsygh+l pe jma;6e 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 positionod9c6i,zhjdyl 8j 04v $x$, 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 scqd2 qrk/ 9y 2en+2yqjhown in the graph, which one of the following choices correctly describes the relationship between the average speed of the ydy/2rq 2+2nkjc e9qq truck to that of the car?


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69#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.42: Which one of the following choices best describes the instants of time, amnw( ,k1sh, -dy-lcap) bpf2bt which the car and tpm-a1,fwbk shb l cn-yp d,)(2ruck 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 orpp/cs-xxi (23zms n-pigin and will move along the x-axis. The acceleration vs. time graph for each car is shown. Which one of the following choices correctl-sxsp(c2pn- /m px3iz y 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 ho+p/(9ym2cx tujg:r n1ahjp/ erizontal line is shown. At what time(s) is the object moving with its greatest spee:+u natj2px 1hmg p9/eyjc/ (rd?


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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 proici nqqf)ya*4 9i5ws) vided. During what time intervy*)4w ii if5ac)9nqqsal(s) does the mass have zero acceleration?


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