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

 作者: admin   总分: 72分  得分: _____________

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

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1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.10: A particle travels at a concxy6zbd9ob/xw5xf9 a r q6s00 stant 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 time without o4f2 ;d)e sqru0d w)es5bh6v*vtrp/p reference to a particular direction is ca6e2s;r)qs54vt oe b0p*vrd ) wu/ dfhplled

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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 compl)kfwdc;wj p*bxp) *) getes one lap around a circular track at an average speed ofdpww kb ;)**f)gpjc)x 50 m/s and then completes a second lap at an average speed of $V$. The average speed of the vehicle for the completion of both laps was 80 m/s. What was the average speed $V$ of the second lap?

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  95.03: A toy car moves 0.80 m in 1.0 s at the constant velj;4.-r7c,zr+ y viu rth qzo1rocity. If it continues, how far will it travel in 3.0 s4r zrj,q-z ohtivr y;r.+u71c?

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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 plany ,; 3f)ao 7oonnwgbp5k 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 lefg5fo,nopow)7y n b;a 3t, 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 mureqjz/ojy d1*z29k)+ 3 asr 2.sgjiand 400 km at 100 km/h. What is the average speed)g/a9ideuz1 oyjs mr.r*2+s2q k3jzj 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 traveli4qid7yiq jkx g8xhg0qd4up8b: 1(p p -ng along the x-axis. The graph 84gqu pii 8(qg4-b7p k:qddp10hjxx y 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 refers to the motion of a toy car traveling alony9 9ekzu +ugb93jqq/ hg the x-axis. The graph shown below is a plot oj9uu b /zge 3q9kyqh9+f 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 r+0gr4jb8hyzm/l0 al vh/ tj)sefers to the motion of a toy car traveling along the x-axis. The graph shown below is a pmlyh sa)h/j/0j480tbrlvz + g lot 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. tg;m wbkto d5b1lm;c dxc7; 9p.ime of a duck flying due south for the winter. At what point did the duck stop1wb; ;59ldtmx k.;pbdoc7mcg 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 the positil)5*j 4w5w umsjqjj3jon and elapsed time of a car starting f53)uj lj5w4wjqjm *jsrom 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 ref +gm.( p qu5l .d /hewhbja,y /x(;fbthgk*v(fer to the diagram below which shows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. Th,p bya.5gd;huh(t./x + bvkl*w/((me fhjqgfe 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 gr2bzdl et s (d6snaky:)gm8w8 zw62ifw+ o3t f5aph for an object with the position time 5obt f8l+ gye2dskafmi)z zw nw 3s6(t28d:6w graph shown in the diagram at right?


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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  00.28: The following question refer to the foqceu/6 vmre.o52 rz7g llowing information. An ideal elastic rubber ball is dropped from a height of about 2 meters,cmee/.6 v orzr2q 5ug7 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 quex y0lw1dfmjs8u2bx)q0wtb/) stion refer to the following information. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor abl8w)0xm2qx )ubdsf1 jw0 ty/nd 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 ae ui615sq a8sc 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 followin+ *ffc kcy32auhg ex/7sp5*scg 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 refeu f)z fr +5t-c(om:qhers 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 follol3jle7 u+nws9 u6r,b gwing 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 scenario: Atq4cjjsk,v13f $t_0$, 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, acl aa)-ucg;f0 uross a horizontal table top and off the table edge. Which of the following w0ua f agu-c);lould 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 relationship between distance and time for an o aw469 21 igzhunr6ehtbject that is moving along a straight line. What is the instantaneous speed of the object at t = 5.0 r 2ziuw e t1hgah64n69seconds?


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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 representsl4 0kaycaumo) e) gh487gju b2 the relationship between distance and time for an object thathc0bamlg 2)euok y7ag448)ju 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 straight downward on Earth wid5(u4ay-.f 2r bu5t 3 p3fl(vhuoeb kuth an initial speed of 12.0 m/s from a 3e(b lduarvb fuufkh3o 42y - u5t5.p(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 below represents a toy car starting from rest and uniformly ay . k ygt)qcxc3k28c4qccelerating across the floor. The 2 8q c. xyqkgk)tycc34time 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 re8x1xam t,ngj4dun4r:st and uniformly accelerating across the floor. The time and distance 4 1n xdam,uxjgr8:4n ttraveled 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 t*sbw l8r u3:s3ov)e.brqb rq +oy car starting from rest and uniformly acceleratingur b)el 3+bwq8br*.sr qvs3o: across the 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 uniformly accelerating ball. The positipmp;gu)+ a-sv8x .r9.i1- njgdeesx t dq4kh8 on of the ball each ppd 4d xg .aki8hstxq; e1.-envs +m-j)g8ur9 second is indicated.
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 uniformlbi:h7/m wmucx369 o viy accelerating ball. The position of the ball each second is inw mmv3:i o7hc9b/6ixudicated.
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 moving4c -kk* qd7q6w5 cq 0wgzihcs f3gjwa;9ok) )d in a straight line is s6fhq 0d dckz43kk w9*a 5cgw-)igcq7s)w ;j oqhown in 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 circus clown on a unicycle moving in a strai:5k: ep) eg:ml1ot:+vaa5 zhxxrf/plght line is shown in the graph b pl/1 :5:+okh 5elret)m xa: xza:pfvgelow.
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 nea *uqthpwuiiexmm)5a5 ,4xxv 2l 4*2z4a e hyk;r 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 the motion of a marble on a ta10hb ga9c6li3wsj6d o ble top for cw o 6b6l9dsi0g a1hj310 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 describes the m0/ ;hgy5kiznb otion of a marble on a table top for 10 seconds. For which time interval(s) did the marble have a positive accelerk i/ gy5nh0b;zation?


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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 fh-0cvb2,b cdg+y tmgg kz8 ./of a marble on a table top for 10 seconds. What is the marbles average acceleration between t = 3.3 s amgd/bcb -2h 0gc8 vfk. t+,ygznd 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 timem+o( f5xx .1: sdoqala 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 f,y wt ;r/o,xka 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 motion ofh-+o p +g,gvcs an object moving with a cons+hg +ov-s pg,ctant 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 accompanyingm9:mq3 f1xjxh graph describes the motion of a toy car across the floor for 10 seconds. What is the acceleration of the toy car at x9mxq m3hj1:f 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 flxggp54c 3a m:k7d 8pnvoor for 10 seconds. What was the x5 kp843n7apv:cgmd g total displacement of the toy car for the entire 10 second interval shown?


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41#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.26:The accompanying graph describes the motion oz-zfz- tgv x+3f a toy car across the floor for 10 -t -zzfg3x+ vzseconds. 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 tot8sae6v ;iycxj7;l2o 60 km/hr in 4.50 s. Which one of the following cho ctjxa82e7svoi;y6 ;lices 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 j;wth sxm8xy zx. .fpp*jp x,w6 o,9e(of the following statements regarding its motion is NOT CORRECT xpsf,xo(.t 6jxyppjx.;,w 98 e*m wzh?


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44#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  07.17: A toy car moves along the x-axis according to the velocity versus time 9n x2hsyx*ao 8curve shown 9oh8sn*xx2ay to the right. 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 that k-43-813v s 61qpcscvep lqp7 knaon ;2htzoc the angle between the velocity and the acceleqn1-;l2scvcc 14o6kpa 8zshv3e -t7k op 3qpnration of the ball is kept 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 andn ps1; r 8x+r2mlk*yiu traveling toward each other.m*i 81r+x;rluy s npk2
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 acceleratios:lx)db orum 1 w65ig)1q u)s.ixyx *rn is positive and increasingxu 1 r5l *)6soxgb)w1r.i) dsx:qmuyi

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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 rineo7 f mo*v,;zco7;ty 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, 8i/b/e6 zqxoaynvxh(jj f3 qj4760 rtwhich one of the following choices identifies quantities that must have the same direct/8(qfn/o j36her q76z 0ivtbyja 4jxxion?

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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 mov2r-vbc;jwup 9wv( ox :lz1/o res $3.0\;m$ 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-ti5e jfmw7 0vi9tme, $y\;vs\;t$, 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-dimena:i:u)cd, l 4knz7lxh sional track for total time T iul:, ax4n kcdhl:i)z 7n two parts.
• Part One: The car maintains constant non-zero speed V for the first $\frac{3}{4}$ of the total time.
• Part Two: The car accelerates uniformly to rest during the last $\frac{1}{4}$ of the total time.
What is the ratio of the distance traveled during Part One of the trip to the distance traveled during Part Two of the trip?

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53#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  08.23: The velocity vs. time graph for the motion of a car on a vx:(h2p(mw x5 ifbx 4sstraight track is shfis hx 4 2xpxmb(:5v(wown in the diagram. 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 vs. time w jqtr)vw1jtn;k-+; vgraph for the motion of a car on a straight track is shown in the diagram. The thick line rrnvw1-w;j;t j tqk+)v epresents 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 b dscg z,/*lfvw;if) kh.:f.cky the position vs. time graph shown. For what time(s) is th)/v gdf.lk ; csfw:i,kcfzh.*e 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 vs. time graph sh8srp.;:uveki own. For which time(s) is the acceleration keu;.:vrsp i 8of 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 accelerahylu; hm- v c. h.qx0.is/-robtion vs. time graph for a fixed time interval of an object’s motion, what quantity has been determined for that obj.q.ih.s/;o b ulmh vy rxh-c-0ect?

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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 i.;cwt 2qfk7m along a horizontal line with increasing speed.
choices could represent the signs of the velocity and of the acceleration for the object to achieve this motion?

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59#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  11.14: A car makes a trip in two partz+t3 k8jta o-iz)m7 das:
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 resf*tl grc6pzn2k e vm;s*8o)v:t and reaches the ground in a time of $2.50\;s$. Neglect air resistance. With what speed does the object reach the ground?

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61#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.03:A small object is released from rest and reaches the i*7vm3) ecjzn2q81u 8f eandr 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 hori*tojb w/s. eidqg)j)6 zontal axis is shown. What is the total distan)ojesj wtd g/*.b q)6ice 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 .3;bu* q;uizs6k st mgo*rdswbu;+)qlisted t; )kz*g b;o6b qwqisssu.dm3*u+ ur; situations for 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 line is shoi*4 o,advm) hcwn. The object starts fac4h*dv ,i)o mrom 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 andih sv j7ed(/ieg; y5e; 7wg2px its velocity along a line vs. time is graphed. Which one of the following choices best gives the proper interval(s) of t7x egpv(je 7y;si52;iw/dg heime 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 horizontal track, each nv/(/9-r )u vravu3nhdrbh)k with constant accel)3/ (v/r9n urvdrnkubvh-) ah eration. 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 pbd2nl0)9 f5)qcxiig *u w:lvt osition $x$, 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 uk+yv8cc6e4 xtime shown in the graph, which one of the following choices correctly describes the relationship between the average speed of the truck to th+e8vx46c uy kcat 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 dyy0ujl cftb4 -c p8a9nc) 14,e hu4xufescribes the instants of time, acex t4u lu 1y)4a90 -yccunfh84 ,jfbpt which the 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 e;vwtuu0 n k28Q, each start from rest at the origin and will move along the x-axis. The acceleration vs. time graph for each car is shown. Which one of the following choic ;n2ku8ev0utwes 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 graph of an object moving on a horizontal+f:d*j 1i v4ygywxmz*f sm66 b line is shown. At what time(s) is the omxdifz4 y*66 w:jbs+fm 1g*yvbject 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 following the position vs. time 6e qn.q7dc4 fzgraph provided. During what time interval(s) does the mass have zero acceleration? c7qzde4.n6qf


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