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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 of radi k-mwt;3gk7s87per .yc/qbsrus $R$, 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 without refe:wgu qwgrnw)(9c7pd u : v;p-va;cy1xrence to a particular direction is called:ydwc u-r v)cnq;ww:p p;xgv97u1g( a

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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)n0k m jq5ks pw5a:1sz one lap around a circular track at an average speed of 50 m/s and then completes a second lap at w1pkajssnz0:) k5m5q 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 cons2*k vj1 d2wyyjtant velocity. If it continues, how far will y* j v21d2kywjit 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 statij s n0vizjwx5 m4,s7-zonary on a 30-kg plank that is sliding at 5.00 m/s to the right across a frictionless pond. The boy then turns and starts walking on the plank at a rate of 4.00 m/s to the left, vxizn5w, j4s0z m7sj- 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/h and 400 km at 100 km/h. What iszv 5b2xapedit,dq8-8/w z/). wyib hn the average speed of the motorist z8i8vd//by.2, tpb5w diwqe-hazx) non 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 jm4pj9uab1 .uq ),hpe a toy car traveling along the x-axis. The graph shu.)j41bum,ae9ph qjp own below is a plot of the car’s velocity in the x direction, $v_x$ versus time $t$.
During what time interval was the car moving towards its initial position at constant velocity?


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8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  97.21: This question refers to the motion of a toy cam 10wjxir: sv3/pduf nn72ko6r traveling along the x-axis. The graph sh nmvp / 7ukj23 1fx60srndo:wiown 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 motioj4jomr x0ot h5,p8 9chn of a toy car traveling along the x-axis. The graph j9p8o r5, 4mo0jthh cxshown below is 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 graph of the velocity vs. time of a duck flying due 9wwg5p70liq:n7 wtfdhp6bu3 q1 mck )south for the winter. At what point did the db p q3g7f)kui7c w:h0lnt 6w1d mpwq59uck 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 3rfhmf o l)(g+diagram below which shows the position and elapsed time of a(mg3lrfh)+ of car starting from rest and uniformly accelerating in a straight line. What was the average velocity of the car during the third second?


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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.18: This question refer to the diagr tlso0ekaw ru bi7(u3/,, jke.am below which shows the position and elapsed time of a car starting from rest an a. 0(obtie,k7u serlk u/w,j3d 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 graph for an object with the posdqe2 t/uqm)d; ition time graph shown in the diagram eqdq)/2t;dum 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 in.i 4kwwevg91ebrx **iformation. An ideal elastic rubber ball is dropped from a height of about 2 meew*9r4iw ikv1e xbg* .ters, 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 in;r89nk jb a3gtdf8hn+formation. An ideal elastic rubber k8b8ah+ntj f;9 n3rd gball is dropped from a height of about 2 meters, hits the floor and rebounds to its original height.
Which of the following would best represent acceleration versus time for the bouncing ball?


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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  00.39: If a boat can travel wit- q3usn0 sgcnm6-dvu3 h 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 followi8+5)iclz,uj)zlgib q tde / *eng scenario: At $t_0$, two cars moving along a highway are side-by-side as they pass a third car stopped on the side of the road. At this moment the driver of the first car steps on the brakes while the driver of the stopped car begins to accelerate. The diagram below show the positions of each car for the next 5 seconds.
During which time interval would cars #2 and #3 be moving at the same average speed?


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18#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.02: The question refers to the following scenarioqof xh/45;nxw f.:lp h: 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 scen: . uj3pvmqui/ario: 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 folxxmb/ ny *-i3;k)a v2pgyy0 je40mtem lowing 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 rollxdw5e 8f7fz(l s down a ramp, across a horizontal table top and off the table edge. Which of the following would best represent a grapw7e8f d xf(5zlh of the magnitude of the ball's acceleration vs time?


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22#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.01: The graph represents the relationship between di-*n - tjl+ynmvmde p0e5 7-itistance and time for an object that inieel*d - yjtmn--mt 0+ipv75 s moving along a straight 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 distance nmcwja9fd 3 87and time for an object that is moving along a straight line. B8w njdf9 am73cetween 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 straight downward on Earth with an i,dd4sv jmrv1s1j ss9;nitial speed of 12.0 m/s from a position 10.0 m above the ground. Ignoring air resistance, the speed of the objecms;91 d rv,vsdj1s sj4t 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 (5pp8/lc j3lfxv4 btb represents a toy car starting from rest and uniformly accelerating across the floor. The tim/3fl85bp 4v(ptxjblce 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 uniformhdebl v orkisn52vau9:+), z3h)x y j8ly accelerating across the floor. The time and distance traveled from the start are shovds)lo bz )25jx he,+a3ivrn8 yuk:9h wn 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 repre1s4 s3s 4/i( hu4cf2aa qsqlhr28gwllsents a toy car starting from rest and uniformly accelerating across /h1a3qr442(s4wg s8asc l 2quh flislthe floor. 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 unife /l()a.+t0 ri r)z- f:rcfv +azjxfekormly accelerating ball. The position of the ball each second is indicated. rrz0ei:+k )ce za+rlxf a.jffvt/-()
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 accelerating ball. The pos44fx g(tv0 crzition of the ball each s4 4cz0g(x vrftecond 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 movx u 5b rmptb)4cin:5xxb(6 c*fqy0y1 wing in a straight line is shown tq *bxiy:cnrwxc6 bf 01 5mx)5bu(yp4in the graph 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 c z;vs.bagd7 c. bg;z3hircus clown on a unicycle moving in a straight line is shown in the graph begb;sc.dagb7 z;v.3 zhlow.
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 thefomdkv 7y68s3 surface of the earth

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33#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.11: The accompanying graph describes the motion of a m-9jnp unzck 9xlg31ma7 u74jb arble on a table top for 10p1n7nak g97 ubjz3j9m-lx 4uc seconds. For which 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 desc,pfe; e5e;yw; krdk) ;z/wwh uribes the motion of a marble on a table top for 10 seconds. For which/5eh, ;uw wrpze ;dye ;f);wkk time interval(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 mop oc+ty5q4vklt) trz ;;pnz2-tion of a marble on a table top for 10 seconds. What is the marbles average acceleration between t = 3.3 s and t = 3.8 so5zt z4vk c;;ltynptp-)2+rq


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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 zxp(b/3m f9u3y+ mcldfor 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, throtb w9a5f;8/xbv-h py ewn 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 followint, uubh4 y3ueb(a1g ,eg graphs could correctly represent the motion of an object moving with a constant 3 u,ugbt ay14eubh(, espeed 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 desav1lr u3er wcwj,a.f6jk5fsm,0h9f +jr0 8rccribes the motion of a toy car across the floor for 10 seconds. What is the acceleration of the toy car at t =3cv jj wrr ej,r+a 10sawl69f8 m5cr .,0khffu 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 a*p v j j(+(*p )/zdi4ovzeciqocross the floor for 10 seconds. What was the total displacement of the toy car for the entire 10 sezjepoqid* (*c(4 +v v)j/opizcond 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 thx98 uazxa ;r31p;jmqhh*j+ fx e motion of a toy car across the floor for 10 seconds. At what times or time intervals must the net force on the thj+;x xamfuzr*9j83;qp1 hxaoy 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.e euip;l; :hi )fsqp-0 Which one of the following choices peiesi;-;qhpluf0:)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 velk gngw.e fo 21iqqi3v(g77kz7ocity versus time curve shown. Which of the following statements regarding izivfgkoq(wi.13 72 e7 nqkgg7ts 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-axi0fx l x6dg :4r9a*xsujnlg0 ;us according to the velocity versus time curve shown to the right. When does the ca:xjl0fg460 n9xdgsal u* x;urr 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 that the angle bet+5wk7zdw. cgm g2 7phxt3se u1ween the velocity and the acceleration of the ball is kept at a constant 120 degree. Which stwupm13tzgske+xd5w.2g 7ch7 atement 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 k :c0cj+k)kcwx3h:0l7p ph2 p hgw7bvtilometers apart and traveling toward each other.bjkpvww3h:0+gtx c0p 2: )plh7 c7ch k
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-ax .drtom hgvbal;(2 v(/is. When the acceleration is positive and increasivg(m dl(bv/.ohr;t a2 ng

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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 vxc 7p(nw 9sg8kelocity 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 rdt 8c+xe,kq+of the following choices identifies quantcdx8t+ +k, erqities that must have 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 move 0 kd2.qz1e7 aq f)g+hxj4w24toyor tgk.oi 8cs $3.0\;m$ 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-time/8sj/jh;1swu sp qpq ., $y\;vs\;t$, 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 tow b90e bd-lg1n11j iu0gm) xhep 3.jygtal time T in two3 jgge1 bdyj hbw-epul0.ng019 )xmi1 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 straiov.q, 5v7x:t vyi zsaee/j.q6ght track is shown in the diagram. The thick 5e e,s7vj6.qoivqv tz. :axy/line represents the velocity. Assume that the car starts at origin $x=0$. At which time is the car the greatest distance from the origin?


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54#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  08.24: The velocity vs. time graph for the motion of a 3z da8i, skv(4m ba aca9suu/7car on a straight track is shown in the diagram. The thick line represents the47 9sb am 3u(vaks8,/zduciaa 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 mo5l fzs;dsxyqi )f /v++gc(q ,xtion of an object given by the position vs. time graph shown. For what time(s) ;,)/+x5sf qyc (xlsqg +fd izvis 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 the velocity ji4gr6c8wj 9-zlyolvnxff3 e8 .bm +m.1h h1w vs. time graph shown. For which time(s) is the ac.whxn3 lf8 w-vl1c o8+j1b rm.jz ife6m94yg hceleration 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 t1b( f65xc/y72t fz vbd7j s *me9n,rgcm lv5bnhe acceleration vs. time graph for a fixed time interval of an object’s motion, what quantity has betcyb*9 (1l,/vnjvs5z d7 f5 bcrmb6 xne gm27fen determined for that object?

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58#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  11.08: An object moves along a horizontyp*qscq-+x 5gw4) n:vb7a e ()qxhreqal line with increasing speed.
choices could represent the signs of the velocity and of the acceleration for the object to achieve this motion?

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59#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  11.14: A car makes a trip in two paf +w in;qp 4q4l4v 8,ub/rmsjcrts:
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 theui h* ;t/5zoyf 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 the grou0fys1 .yjnt0(o ks eh-; ar)xind 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. ti(qu. qoo) isjhs :d*3yme graph of a particle moving along a horizontal axis is shown. What is the total distance travelds *:yoqh(3) sqj iu.oed 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 folxy,vuj l4 y9qhs(8 0stlowing choices correctly identifies all of the listed situations foyjq8l xy490ss vhut(, r 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 li.5g) aai3yc;n zgn76g ve.xee ne is shown. The object starts from rest at time t=0 s. At what time(s) does the object attain 5g6)a ;y..ezcxevnn aeig3 g7 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 vmil6ajb jaa trm-gde6*036t1 elocity along a line vs. time is graphed. Which one of the following choices best gives the proper interval(s) of time for whicitr etaj 6-a6 ldamj310g6bm*h 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 horizontal track, each wiv frpqfl9/i 6u-73 euqth constant accelerationv73que f9lf-/p ri uq6. At an instant of time, the information about the cars is shown:
Car #1: position = 125.0 m; velocity = 13.0 m/s; constant acceleration = $1.5\;m/s^2$
Car #2: position = 80.0 m; velocity = 9.30 m/s; constant acceleration = $5.5\;m/s^2$
During the next 1.0 second of motion, which one of the following choices best represents what happens to the distance between the cars?

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67#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.14: A particle has a pocd*o 1.o8episfz)up - sition $x$, 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, (xz, i 3d5trbs6/izy nwhich one of the following choices correctly describes the relationship between the averag s6ib/ id5x, yzz(n3rte 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 5ctmigo8 . oj s9h-*ly7qy e,hdescribes the instants of time, at which thei. 8y5qoy-,mh9tg*hjso cl e7 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 rgwu7az ,2lpz7o9q1 p zest at the origin and will move along the x-axis. The acceleration vs. tgzq7azp w l2 ,7zp91ouime 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 granbrkp ell 2:0.ph of an object moving on a horizontal line is shown. At what timeprbl:0.2 n lke(s) 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 tmw6 r9,ur)l dmhe x-axis following the position vs. time graph provided. During what time interval(s) does the mass have zero acceleratd 69rrl)mu,w mion?


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