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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 at3 aqtt8) l;i f/tsuh/9w2qxi g a 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 distance per unit timbgh48egbfr*5 /psw 0i+ svq b;e without reference to a particular directiob8hbw fibe 4ps /sg+*qvg50;rn is called

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  12.29: A vehicle completes one lap around a circular track at an average spee ;mj3h/5l gx-nvy;sq7utut nwy8 x(k6d of 50 m/s and then completes a sec5u/t sux-lh3nwx;gq6jy8 k t v ;(nmy7ond 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 con29onzp;ejh sd(+kl5fn cl1;v tinues, how far l+ skn;vd2o ;nj1(hlze59 p cfwill 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 1ms- * su*ah7/vicxmrplank that is sliding at 5.00 m/s to the right across a fric-hcu*7a v ms/rs i1*xmtionless 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 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/hh h )rccz71/wd and 400 km at 100 km/h. What is the averagc )r7d /zcw1hhe speed 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 refers to the motion of a toy car travelingomgm kv42w(b5 d*ru -b along the x-axis. The graph shown below 5b mw- *omuk 2bvrdg(4is 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 motion1us yhkz(qhd) ,y 9*cu of a toy car traveling along the x-axi*hu,s 9)qkcydz1 y(hus. The graph shown below is a plot of the car’s velocity in the x direction, $v_x$ versus time $t$.What was the acceleration at 33 s?


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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  97.22: This question refers to the motion of a toy car traa/bzn )r5jd*; /rqnap veling along the x-axis. The graph shown below is a plot of the car’s /z* r;apb)d/jaqnnr5velocity 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 flying due t ,qyfw- 7q gjtfo/50csouth for the winter. At what point did the duck sto f5 fy/ 0jttcq-qgow7,p its forward motion?





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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.17: This question refer to the diagram below which shows p,afjjvj1 b:t* we+3uthe position and elapsed time of a car starting from rest and uniformly abf,1j au:jw 3v+j*tpeccelerating 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 positiz2m)0q a:,ib (nw asnw vpcz)2on and elapsed time of a car starting from rest and uniformly accelerating in a straight line. The average acceleration during bz0w22nwvspia (:n, ))cqmza 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 m3mq0 uvcqz7rz-;g 6vtime graph for an object with the position time gr uvz;z 3r6q7-c0mqmvgaph 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 -yw. y)txqho 2:gk4tp(f)nisfollowing information. An ideal elastic rubber ball is dropped from a height of aboqhw ot.2ky y-:p sf)n)(4gxtiut 2 meters, hits the floor and rebounds to its original height.
Which of the following graphs would best represent the distance above the floor versus time for the above bouncing ball?


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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  00.29: The following question refer to the following informaygqg-*.*( d88al r vacytub j8h2f *oetion. An ideal elastic rubber ball is dropped from a-8 vlfa guqh8cr b*2*y* o (yjtgd8.ea 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 -nyxp7m 3y9 oiwith 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 following scencjpn+7boe.0q+j7y j 8gal fi2ario: 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 te pa b3ly rf)1- z4cz)bfdtpwl;7v /m ,xcnc./he 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 follonoyr h+fkq ,9w jn+f**wing 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 r 4 zce8lea:-1/m dgfedefers 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.
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 horizontaqk*xkk ), fuvui;.0pcl table top and off the table edge. Which of the following would0 )c;k*xvfkuuq ,ki. p 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 represents the rel 7g43 qf4gh:e2fu ckhzationship between distance and time for an object that is moving along a straigc u37h:f2gqhzk g4fe4ht line. What is the instantaneous speed of the object at t = 5.0 seconds?


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23#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.02: The graph represents the relationship between dista srz1r/s/f6 tmnce and time for an object that is moving along a straight line. Between what times did the object have a non-zero accelera 1srzr6s //mfttion?


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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 straps)5s-q+ .qsrv+m6x3ao6lwxd y2 mopight downward on Earth with an initial speed of 12.0 m/s from a position 10.0 m above the grolp2-+ ss sxov6+aw6m .pqor dmy qx5)3und. 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 startdw)(z 4gj 0 9lpfntt8ring from rest and uniformly accelerating across the floor. The time and distancwfg8(z49d0nr p) ttlje 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 represenu4/(4,toxjndte o jeqm10v8e ts a toy car starting from rest and uniformly accelerating across the floor. The time and distance traveled from4netxj ov e0qde1mo 4j(,/ 8tu 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 repdl0 3fz b0c vpg3u6x/n1 2qlrkresents a toy car starting from rest and uniformly accelerating across the floor. The time and distance traveled from the sta/pzcb v0lqlf26 rkdg1xn30u3rt 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 tf8c)hywe: 6 xem+22,ux(duut0hakn:su o2f of the ball each second is indicated. h2du ft n(fem2 cuoe s6t+xu)u0hx :k:8,2ywa
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 uniformlpl,m/ha edn8bp4uvp 7 (uz .v.y accelerating ball. The position of the ball each secondhvp4p8zm e(/ .udpa7. nvul b, 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 circus clown on a unicycle moving n;;oh 2aq qnrlay:8 p7in a straight line is shown in the graph bel8:hp;an nl2 q;7aoryq ow.
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 ii2 ul j (2yh-wj+oxx7g-b5 urxn a straight line is shown in the graph beloy7lixh2wj ju xgxr(5- b2-+uow.
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 absiu 1cyv d/f(-*/ vne vacuum near the surface of the earth

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33#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.11: The accompanying graph descr t/8ouk z8k5hhwva+f; ibes the motion of a marble on a table top for 10 seconds. For which time interval8/ kof58 u;vkahtz+w h(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 describ 8t5okysi2hun czr/+ 6h08ck oes the motion of a marble on a table top for 10 seconds. For which time interval(s) did the marblekoytcuzn5208/r kch 6s+8o ih 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 accompany)1 ktb( h d0cw61qatqwing graph describes the motion of a marble on a table top for 10 seconds. What is the marblewd tqw )1(chk6b0a1t qs 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 ofq*ajh,5 ig yd-gp8rm. $2.00\;s$ 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 sm xfudcaj*d,j , :-8 d0f(udrdtraight 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 graphs could correctly represent the motiog.m +12jlawoj n of an object moving with a constan1mjwja. g2+olt speed in a straight line?


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39#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.24:The accompanying graph describes the motion o8jxe3 tjkr/k3f a toy car across the floor for 10 seconds. What is the acceleration of the toykjkjr3 38tx /e 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 the flnqq,z*d: ogq/8)yg *zir s6rjoor for 10 seconds. What was the tota qg)yd*zg,r:6/srz 8oj n*iqq l 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 describes7anv 5q+k, 90 eq0;jyjav liqc the motion of a toy car across the floor for 10 seconds. At what times or time intervalscve ai kj nqv;ql,09a0y7 qj+5 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 0 km/hr to 60 km/hr in 4.tu,8 +4b p3 gpyznq ss5lh05fv50 s. Which one of the fp538lgt0u +5vy ,s zh bsn4qpfollowing 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 of the follow xdurc53pcudj e,: 0w,ing statements regarding its motion is NOT e:,3wd5d u,rjp0 ucc xCORRECT?


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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-rr+ ch4.0b bs74ja zbdqki..eaxis according to the velocity versus time curve shown to the right. When does the car have ze+7kq4 bedhs 4 bza.0.rrcji.bro 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 tha2kdd;xy5. qfs4u ,xzv1z5a ijb 6.zv-. tjfhgt the angle between the velocity and the acceleration of the ball is kept at a constant 120 degree. Which statement is true about the tenn2;j6igv bzqd,k- s.a f fj1z..uhxtvyzx5d 45is 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 eachb4.ij xe 6:8px(zpfou other.xiubjx46: (epf .z p8o
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 jz/c4m2cl .fo2 m+ byuincreasmfcob z um/l 2cy4j.+2ing

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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 veloci (r2 )t;-shwahue.z: jo ol:pkty is

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49#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  16.18: For any motion in two dimensions, which one of the follow9w le 4ltqz)x*si7-u 3xg q(q3ypw y)wing choices identifies quantities that must hap9 w3 w3iu qqz-l)yxl7tew(y gs4* )xqve 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 moves(h v10 kedc),tp mol)ay).mfo $3.0\;m$ 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-ty47pvd:lt0 +lfdr4a41ym grgime, $y\;vs\;t$, 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 rightq wxpgx6bocb 49 4g;bt.w3 lo9 along a one-dimensional track for total time T in twoq 64g 4xo b.gbo c3pblwtw;99x 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 tzwlwt) 53c y6rrack is shown in the diagram. The thick line represents the velocity. Assume that the car starts a3r56ww)lz c ytt 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 thed jm+sxgm.lwu:n 0q09 motion of a car on a straight track is shown in the diagram. The t0mm+nq:dg.x 9uwlj0s hick 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 bym.(n,x jx wkzzr dlp+nuv/:-3 the position vs. time graph shown. For what time(s) is the speed of w(z:vd.j x/m- plnuzk x3r,n+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 graph shw ,:za0ua-uzb4sz+ 5b6f yjwmown. For which time(s) is the acceleration of th zuzwasu:w yb+ 0b-4,a6zjfm5e 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 t6f) yhvm.wzl7 he area under the acceleration vs. time graph for a fixed time interval of an o.l7zhm w vyf6)bject’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 alo m 81(;udeiuccng 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 inhg 584 q7qntz qmlsmx4*r 9uhz1o16ze 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 th.be 3 gpf6g2)humxjh8e 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)ot n-o99 kznp:*jcmd6; pu0o vu)hyteleased 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 graph6c u ivlq/,f;t of a particle moving along a horizontal axis is / tqv,l6 fiu;cshown. 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 the following choices correctly identifies all of the listebgdwt41) sl:q 8.:ccyk b6eovd situations for.1 c o)8:6 wqdlgte vcyk4s:bb which 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. time graph for an object moving along a li5f8cv 3rnf0kz ne is shown. The object starts fncf8zvk 0 53rfrom rest at time t=0 s. At what time(s) does the object 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 origin and its velocity along a line vs. time io2;ha9 oib+,q 1 to+c6pwjqag s graphed. Which one of the following choices best gives the proper interval(s) of time for which the object is moving away from the origin? q 2;pbco+a 6it+ojh q9o1gaw ,


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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 horizontal track, each with constanu) y84p+ 4g+xmo ur8s: :jfo-knyrcmot acceleration. At an instant of time, the+cupmk:moy-8j8 4 gfr u:4x+soo)y rn 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 zpy tbu 46w0z2a 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 graph, wh)w3a (z4vbcp*6pmcln ich one of the following choices correctly describes the relationship beta pp6c*z)(34vmc nblw ween 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 descriv q* r771+ uk1mrbutsnbes the instants of time, at which thes7 ku7qt1rvr n* mbu1+ car 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 rest at the origin aq mjb6 ) ygghy/m9hjged-zs27g 50k 0cnd 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 relatiz yg9khmds5/)bjm6 h-g eq0c 07gy gj2onship 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 o;ubzw) 3kn0nsalp9l/d /s jt1bject moving on a horizontal line is shown. At what time(s) is the object moving with d;zb/9ja tnl1sk 0) pn3w slu/its 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 along the x-axis following tsksw 0 q72l:5-+(rbcmj hzzt ghe position vs. time graph provided. During what time interval(s) does the mass have zez:r20jqwg -s htblszk (m+c75ro acceleration?


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