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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 s* kru 3;+ydrqwpeed 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 time withouog21vnwp ,wd6ydx :l)t reference to a particular direction is cadw dyl w6vx2ng,)o1:plled

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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 l:sh+jnin x 6-uap around a circular track at an average speed of 50 m/s and then completes a second lap at an average speed o6ju x+:is -hnnf $V$. 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 constagcp 45/ bgi:klnt velocity. If it continues, how far will it travelk g:bg45lci /p 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 m6h3yl fbcs )zv2 jisq+rq(q q1c.2si 6/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 is the speed of the plank relative to the pond now?2(v.l6 qfc3hq12)+srsy6 qjq s ib zic

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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 k+)ms.jwnz a1j;su* w100 km/h. What is the avezmuwssaj;w + nk.1)* jrage 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 trin60mf: v*v20v8h yti0ch o,svmu ;miaveling along the x-axis. The graph shown below is a pvyimimin; hv80 0c 0fhvt2uo*m, s6v:lot of the car’s velocity in the x direction, $v_x$ versus time $t$.
During what time interval was the car moving towards its initial position at constant velocity?


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8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  97.21: This question refers to the motion of a toy car traveling alo2q)+- qhfb7ikgvin.lq+u cru+vva 9 1ng the x-axis. The graph shown below is a plot of the car’squ7+hv)ql.k9qu bifn2a -iv cg+ rv+1 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+m99qvti/ pzevj k7g 9 to the motion of a toy car traveling along the x-axis. The graph shown below is a plot of the car’s velocity in the x dire/gj k9ev+9 m7pqi9tvz ction, $v_x$ 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 veloowsvp;0me d*x*gr;n 8q w2,l ncity vs. time of a duck flying due south for tpo0* nwed*s8nxlg;,;m2wv q rhe winter. At 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 whq /a4v vi2mmyaw 1atd0)x9,ibich shows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. What was the average velocity of the car d ,wtiaadva q) 4mix2bym10v/9uring 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 zrgf :f4tl ;y1)(rkindiagram below which shows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. The aiy1l 4:)rn g(kfzf;rtverage 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 thevfm.o : qxanwyw3t- 5)yv zi;fu.; eu9 velocity time graph for an object with the position time graph shown in the diou q5mitfna fev w;y3x9 .;wz) y-:.vuagram 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 referyj83gsj1s b. acb 5tfj a(+w2k to the following information. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor jg1.jybs+ 8jc 35sbkaaw ft(2and 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 information. An ideal elastg.:/i y(sp(mfx)l fxric rubber ball is dropped from a height of /s(xpxg)fli:y( r.fm 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 travemqlr+x.dt 8kp-re07 1 7v qegpl 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 following scenario: At .qphe k;*qei.c/.knm s* ci ai.p6z0h$t_0$, 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 * (qn) emc:koiqhpw(8refers 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 followingm4r4z .00 uhggc7tbkzr.qr. f scenario: At $t_0$, two cars moving along a highway are side-by-side as they pass a third car stopped on the side of the road. At this moment the driver of the first car steps on the brakes while the driver of the stopped car begins to accelerate. The diagram below show the positions of each car for the next 5 seconds.
Which of the three cars had the greatest average speed during these 5 seconds?


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20#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.04: The question refers to the following scenarzb0*u i os5 ;c9oc:ifeio: 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 topok 8 ffuvf;54+3yjiuw and off the table edge. Which of the following wo fuy3;o+kw85 4 fujvifuld 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 relationshi+8wof42ee vzlp between distance and time for an object that is moving along a straight line. What is 2oe ze4+l8vfwthe 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-oz qmnd84 t2r relationship between distance and time for an object that is moving along a straight line. Between whrz8tdm4- oqn 2at 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 tf )p ;btk :98pwfg6qhqf2m wf;hrown straight downward on Earth with an initial speed of 12.0 m/s from a position 10.0 m above the ground. Ig6qwh p;8tgb:kp;f2)9qmf ffwnoring air resistance, the speed of the object when it reaches the ground is

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25#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.11: The diagram below represents a toy car starting from rest and:xciq-bygdj;s 28 d *o uniformly accelerating across the floor. The time and distance traveled from t cod-qb:gsy j8d2* i;xhe 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 restr 079rrv3idc d er,3sa and uniformly accelerating across the floor. The time and distance travel,e 9 r3r03av7rsri cdded 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+zdizu0(gf3+a p f72knzqgx9 represents a toy car starting from rest and uniformly accelerating across the floor. The time and distz + f+0 k(a3zingqgf9zxupd 72ance 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 uniform srpmd-pe/l ::-fg 7dfly accelerating ball. The position of the ball each second is indicated.: 7m /sdpf pl--:egrfd
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 accele2,l foln us7k(rating ball. The position of the ball each second is indicated,lul7(o 2ksn f.
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 c qsxw,0irdu k -6 xmy-i1q,3ea straight line is shown in the y xqw,m-6c-0ku3sii, dqx er1graph below.
What would be the acceleration of the clown at 5 s?


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31#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.18: The motion of a circus clown on a uwe77yn3gvyz5: rmn3 o59khcynicycle moving in a straight line is shown ic3k:eyny mzyow vg735rn 7h59n the graph below.
After 12 seconds, how far is the clown from her original starting point?


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32#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.04: When an object falls freely in a vacuum ddps27m l6/ctws4 dib(z e35gnear 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-/v, 0.)nmetxs tf,cjcsn -kn the motion of a marble on a table top for 10 seconds. For which time interval(s) did the marble havejfn,sxcec,-n)t k. m/-0 sn vt 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 motiobk jn66+-:ek(i8uly jvwn 7 xwn of a marble on a table top for 10 seconds. For which time interuj(vwx y-i7+nnbkl6 6w j8ke:val(s) did the marble have a positive acceleration?


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35#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.13: The accompanying graph describes the motion of a marble vl,acxbqn8h9bnr 5,zy ;y1w ,on a table top for 10 seconds. W, bwbcx5n98 z hvya y,;1qr,nlhat 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 accelerates uniformly from rest for 6plmkf8nbc4c/xmx2bp d6p4 wpki93: 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 str/f6(xe3zqi vw o)+ke paight 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 qmd0(2opno d.u b:n(s motion of an object moving with a n0o umo(2q :ns(. dpdbconstant 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 of a toy cn ybyql 2 hiwc2xz916b6f1sm.ar across the floor for 10 seconds. What is the acceleration i9qb2121xy csbyzh 6mfw.n6 lof 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 thy+p.y2a ksd /fnnf ( 0yinn+0re motion of a toy car across the floor for 10 seconds. What was the total displacement of the toy car for the entire 1nnrs.n k0/d+i2a(+0n y ypfy f0 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 mo (x*xxdypj( v pw:l0ywqm)48btion of a toy car across the floor for 10 secondx vyq(4d p*pwxjb8y x)w0l:(ms. At what 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 0 km/hr to 60 km/hr in 4.50 s.t 6(fffbahb2,+ l8dbhnosl :+ Which one of the following choices best represents the acfl:(bf 68d,+o+shthl na 2f bbceleration 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 sk e,qn 5gz ,frklxj58(hown. Which of the following statements regarding its k rzlf5( ,jqx85gekn, 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 vers(4ws7cic u)9kjeur b- us time curve shown to the rigec -sb4rk( u 9uwjc7)iht. 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 bnj hrbh0xx p176m rpkk5fo//hey 4t3,all is moved so that the angle between the velocity and the acceleration of the ball is kkr/tp 0 nbr3e hfk45jo/ymx7ph, h6x1 ept at a constant 120 degree. Which statement is true about the tennis ball during this interval of time?

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46#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  07.03: Two automobiles are 150 kilometers apart and traveling toward eace wsn8j(+v;k 61w*ytl 4kednm h other.1l6 nj8+w4k *mdw(nsve;e tky
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-.jfmutsv5f 73q y*w1 aaxis. When the acceleration is positive and increasfwsa31j m7.tq vfu 5y*ing

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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 averagez *pa80(jwn 6crkulu3ffz0 / w 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 of the7bg (+ vzr 9gi4xg;+ty;znuva following choices identifies quantities that must haveu rivg ;vtn+( y7agx49b; z+zg 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 movy k508/wsz0h7ausdf m es $3.0\;m$ to the North in 1 second. The car then moves at $9.0\;m/s$ due South for 2 seconds. What is the average speed of the car for this three second trip?

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51#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  07.05: The position-k+ai2h ad84 0ickua0kj hy4ols mh7ht1w0 96dtime, $y\;vs\;t$, 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 td *foz7)sj7:zh5 u(ydxu/dng rack for total time T in yd(/s*h:dd5n)7 zu7uf xzogjtwo 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 carfpd4r pd/ m;98ttg r:i on a straight track is shown in the diagramtg/i:d 4rrp9; dt8fpm . The 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 jwrvd 0-o:pi;vs. time graph for the motion of a car on a straight track is shown in the diago w ;pj0:-vidrram. 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 vs. zb n96k 3td0txtime graph shown. For what time(s) is the 3 bzx06nttdk9speed 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 9 8 ;a8sx 7tvfdzy8qibof an object given by the velocity vs. time graph shown. Fo x8vd8 8i9 qtfsy;az7br 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 the area under the acceleration vs. timekx67y2cvppm-wzmzp i6-o0w 7 graph for a fixed time interval of an object’s motion, what quantity has been determined for that obo77mzkw20 pcy 6wimp-zp6-xvject?

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58#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  11.08: An object moves along a horizontal line wi,rje2ztdj z.h slr82;p9flc0th 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 parts:z 8sv- 88zrfesrou48qr)ad4 g
Part 1: it travels a distance of 800 m at a constant speed of 4.0 m/s.
Part 2: it travels a distance of 1200 m at a constant speed of 20.0 m/s.
What is the average speed of the car for the entire two-part trip?

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.02:A small object is released from rest and reaches the ground in)1bzuj 1yfzdyn6/h o0 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 fro esqfz/he1 v 2w:0kk)jm 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 afj( ep00k+ k 2o iisedf,,o-gdxis is shown. What is the +pf0i2d(ijk os-eo,g e0k fd, 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 tf l4 5f3wz kef8:4fhvthe listed situations flffzt :8ke3fv 4w4f 5hor 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 movin8bu2l.)dp si 7/w hg ntlu4xu.g along a line is shown. The object star72 )x8w lgib4 .sutu hpl/n.duts from 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 1xzj ;c+gwfr,;iiq+ lulqt+5the origin and its velocity along a line vs. time is graphed. Which one of the following choices best gives the proper interval(s) of time for which the object is moving away fr;r+ tq gcz,fiiq1lluj5w+ +x;om 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 horizosdi2*c5wi1x vrg,:e i ntal track, each with constant acc wv2:r,iix5sg1 id*eceleration. 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 ha d(p 6t+dwx(xhs 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 graph, which one of the followi ; q0nzg.pjgg7ng choices correctly describes the relationship between the averaggzpq ngj;0.7ge 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 describes the v).m:ew n(qlwz.ai6u instants of time, at which the car and truck travel with the same speed zwqn)ulvmawei 6 (.:.?

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70#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.30: Two cars P and Q, each start from rest at the origin and will move al gggl8 2t 7++zkffoewvbw+-.y ong the x-axis. The acceleration vs. time graph for each car is shown. Which one of the following choices correctly identifies t+ wwg-y fo v+.t8eb2f7+gkz lghe 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 grap(ir *sj:ztrivh75 uu b1pso 3or7g2, zh of an object moving on a horizontal line is shown. At what time(s) b5u( so:7v p isj ritou,z12rhz*g73r is the object moving with 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 follow c7vs:nswd9wx ea*w6 6ing the position vs. time graph provided. During what time interv9e6*:dw 67xn wa wvsscal(s) does the mass have zero acceleration?


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