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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 o ae ,maw/yhh23ia k50lf 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 reference to a particular di +/r.j+g gzv1une )bcjr+vgb1z+. g)eujc/r nj ection 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 circulawsqu 7y 8fd4.9wy* )dbf3nb (jenj2yzr track at an average speed of 50 m/s and then completes a second lap at an average spe)nj zn27eu wd4 d39j .8(byfywfqyb *sed 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.(lg7q8 +q sa,7 e8yf 5yuwlggo If it continues, ho+7lqo ,afgyw 8g8 (ulg7qeys5w far will 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 plank that is sliding at 5.00 no0 y;rc,)f bzv h)gt):g6dfym/s to the right across a frictionless pond. The boy then turns and starts walking o )o;c zhfy6rd t)f 0yv,gng):bn 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/l ,7) ceawcvp(h and 400 km at 100 km/h. What is the average speed of the motorist on this tri)v,l7cc e(ap wp?

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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 traveao; p )-xzeda(2ed (nr4 z u7tg+uovuyqkn12 1ling along the x-axis. The graph shown below is a plot of the car’s velocity in the x deud+a74uqu yg)v 1 o;t( (z-2k1z2ndaprex noirection, $v_x$ 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 along thgg;inpuc1kb- lpbw :6 v-t szm//9z,ce x-axis. The graph shown below is a plot of t;-l pp-/:z/szngtb6wg,i bv m 1cck9uhe 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 traveling along the x-ax :v/twltuj87v is. Th wv8:ttvu/j7le graph shown 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 cn/m.7bkv - nw)h;odz vs. time of a duck flying due south for the winter. At what point did the duck stopn) hz.;v-nod b/7kmcw 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 9n) ohq- naq6:lh7rd mkfgq(4position and elapseng9-4)qrma7 ql6kh(hqnf do:d time of a 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 diagram below ok sb3y6qqws4.).+kc q/ tzwawhich shows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. The average accel qk6s kz)q+4 atw wq/c.3osyb.eration 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 /bwo;z wpk*i )kz.mg4z g 7f)xposition time graph shown in the diagram at ri.fbwgw x kok) 74zmz;*)pgzi/ght?


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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 /4 q/ l vp96njk)zkhorfollowing information. An ideal elastic rubber ball is dro j o kq/n9)kh4vrpz/l6pped from a height of about 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 information- ayt3u ,w3ep-qwhm+fxk +.expf.tg8. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor and rebounds to its oxfq 3ef.m+p th.x8w3a e+,gt -u-wkypriginal 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 jxt /a:kf j2sg:n8.jz yvo *v2a 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 followinf00r4mlc y7( wmna0 vlg 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 scenariok 2o ju5;uhu)v: 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 refe c,lp6k9+ mtucrs 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.
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 rk to06tz6ubc)lh /eo9 efers 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 horizonta( vkm:j/xjzf 4l table top and off the table edge. Which of the following would best represent a graph of the magnitude of the ball's a xk (jf:jmz/4vcceleration 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 representsoen c)/ px3d:xp::;y :pw/blmya mk1l the relationship between distance and time for an object that is moving along a straight line. What ixn 1:c)3:wmklm pd/;:x apl/oe :pyby s 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 the2(dy/c i4 w1kxqy q8c oycni7* relationship between distance and time for an object that is moving along a straight line. Between what times did the 1yq2cw id yn*yckc78/4 q oxi(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 *.(ae m/mnivkzik t5zi.5e4m thrown straight downward on Earth with an initial speed of 12.0 m/s from a position 10.0 m above the ground. Ignoring air resistance, tzn( mie/ami5mztk k .* ei54v.he 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 uniformlo,wp7r0zn6znq c *f( 7l7gcr py accelera7pqz7 (nrfr plwgn*,0z7occ 6ting across the floor. The time 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 and2( e*jv5. f:bzekv h1i+zc pnq uniformly accelerating across the floor. The time andzb:jvpeqhc2 + 5 k*vi z(.n1ef distance traveled from the start are shown in the diagram.
What was the acceleration of the cart during the first 0.4 seconds?


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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.13: The diagram below represents a toy car st h rhme7itxl u,*5fd2:arting from rest and uniformly accelerating across the flhhrx7 imut f2*l5,de:oor. The time and distance traveled from the start are shown in the diagram.
What was the instantaneous velocity of the cart at 96 centimeters from the start?


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28#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  04.08: The diagram shows a undk/7al7d 3 6aea7w5 dcb,qwnj0 n1ftb iformly accelerating ball. The position of the ball ed03a/ adbf7 ,d7a 7wn615ken w qcbtljach 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 uni0h nxf63a5dun formly accelerating ball. The position of the ball each second is indfax nd6n0 3hu5icated.
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;b 8ax -rtfyzi( c0cz( clown on a unicycle moving in a straight line is showz0azc8- ;ibyx((tf r cn 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 xx+bcw2mpkcl1:++o5 lf1 emx a unicycle moving in a straight line is s 15xm:xx2e+ lcc+mw ob+f pkl1hown in 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 near the surface ogub-zem2s/i- f 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 tn/(4 mego tbv0kafau ,7yv3/fhe motion of a marble on a table top for 10 seconds. For which time interval(s) did the marble have tvao07mkgv/ u /fyn(fe , 3ab4a negative velocity?


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34#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.12: The accompanying graph describes the motion of i,81j6lgjiufo7ot ;whf t*n0 a marble on a table top for 10 g th1ju;loi*fi7o f,6 n0 8wtjseconds. For which 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 descrs0 -qz2a)veiribes the motion of a marble on a table top for 10 seconds. What is the marbles average acceleration between t = e-vr)2 q0azsi3.3 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 ; n;t7nbic ob en5y3-fa 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 strad..tq lj4k p(right 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 mmk5b56lzjm gluj;, pxgv- ;-could correctly represent the motion of an object moving with a constant speed in a straight 5 mv-gm;b-xj, pk 5z6m lulg;jline?


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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 theme8j,qb0j uy( motion of a toy car across the floor for 10 seconds. What is the acceleration of the toy car at t = 4 s?ebj,(uy qj8m0


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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 th 05jt/mv p)krse floor for 10 seconds. What was the total displacement of the toy car for the entire 10 second inter05pv/ s)r mtjkval 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(u-qk p-a24mjar0tn 69ez(z /q ffrio motion of a toy car across the floor for 10 seconds. 9a40 anr2fkp i -mu6(oz t(qqr-/f jezAt 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 unifx nmu4rf:f eg,kee0*uq 42 2ilormly from 0 km/hr to 60 km/hr in 4.50 s. Which one of the f2u em:er e*uf,xf0kqn l4i2g4ollowing 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 v9fr+6a e*;xuwnnq1if ersus time curve shown. Which of the following statements regarding its motion is NOT COfu w 1rfqxi9a;+n6ne* RRECT?


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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 alon csrpb9 09hg*83zqv;ge 7dekmgg+ /uug the x-axis according to the velocity versus time curve shown to the right. When does the car v7eg9q s*3rgucg /p 9zbgdh+;08ekumhave 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 mz+ wb lid9(o/yrjs ez/1-ony(wv6d3 the angle between the velocity and the acceleration of the ball is kept at a constant 120 degree. Which statement is truym1jz(/e wz+dbsiw9 y3v6l -do o(rn/e 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 ty h,c 35op; vi.fkjvmn(bb7 yz0kf, ,.ask: kgoward each other.m. kf,5(jo.,p 7ak:kisc; y 3b vfzkbv0hg,yn
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 po 5.,-upu3cg nq5/fplg bo wq7wsitive and increasing 5 5/buwg.7oq-cqug3fw,pnlp

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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 velocity iv/qn9xn+ g48 fb8otyr8vcpyf4gz3y5g w 7 p ,fs

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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 motionni c0m wv(4p- - ydsvfqdc:d,* in two dimensions, which one of the following choices identifies quantities that must have the same *-0 wv,(ipd :m-qdfc cn 4dsyvdirection?

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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 movespe-g bk;aa zyas+7- u) $3.0\;m$ 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-5kn8jc;j h*b htime, $y\;vs\;t$, 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-dimensionalf+uomvr 612gm track for total time T in two rfg uvom6m1+2parts.
• 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 a4bl,mv )pdl1w1zg et1 straight track is shgld,m)e 14v 1pwlt1bzown 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 graph for the motion of a car on z)/jg9-vz er6)ls(,) *ivz phbjznq i a straight track is shown in the diagram. The thick line represents the velocity. Assulis )gz6) /-,hqbr zi9jep*v(zn)zvjme 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. time graphwh1vpqq cs21k578(d9 pls gaf show1gpq1 avd9c sf527skw 8 (lpqhn. For what time(s) is 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 vs. tim0w p/li8k 6wyae graph shown. For which time(s) isl w6pya/kw08i 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(j v9kmt3/g2dqrp ho2b d0j2 u. time graph for a fixed time interval of an object’s motion, what quantity has been determined for that objeck3gm2o 0drt9j/d( pu2vh 2bj qt?

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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 albj9tkja bm+4 kv10e1tong 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 pe/p y2b x r,a1:rw*zjbhg0)g oarts:
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 gp)(i rfgl; rcsm.+n f(dc- ,b6uouq+rest and reaches the ground in a time of $2.50\;s$. Neglect air resistance. With what speed does the object reach the ground?

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61#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.03:A small object is released from rest and reaches the ground in a n,8mi40b4 d :w qfr4vhp5qgaetime 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 bl (0ujap( 6 3dm2pdeegraph of a particle moving along a horizontal axis is shown. What is the total distance traveled by the particle from t=0 to t=10s d 3b d((6mualejp2 p0e?


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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 follow-kjpy//pc1vx zc.z99k6fyfd. i h lc7ing choices correctly identifies all of the listed situations for which there ikyzc. df -/pl jzxc7/. 19ckhyv69pfi s 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. d 9.,5v-,h nmmw6*rgnr/ uhehb ym,ertime graph for an object moving along a line is shown. The object starts from rest at time t=0 s. At what*u mm9r6b gnn.mrh d eh,-ev,h y/w,5r 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 amnmp )b6jtq /z2,gk 1a3s 0fwq 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 m6)b0a23ntqsp jmwg zq1k,/ faway 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 rig(l/* 9ik0w78pzo+ql auy e0bkm uo*lvht on a horizontal track, each with constant acceleration. At an instanloabwqz7*louk p90u(/k 8 v0*li m y+et 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 pciay n+ 3*s+hf)fz0ybosition $x$, 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 o+g h9viu 0f93.coqz vx(sav19y t 9wbsf the following choices correctly describes the relationship between the average speed of the truck to that of the car?1xi bv th.sw u3 +9v0c9y(9ozgqva f9s


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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 instant(y.aej;t1s1wfhp ksb / *j*vqs of time, at which the car and truck tr by*ap/fet.qj1s1h k(wj ;*s vavel 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 agx2y lofekhej7+8 * s1z-i te3t the origin and will move along the x-axis. The acceleration vs. time graph for each car is shown. Which one of the followi12 oyg3xi-l+f8h je *ezt ke7sng 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 graph of an object moving on a horizon4sx77yjwi 8t d8-nck*s7rmg 1,h pvvq tal line is shown. At what tw8 mi1gnk7yp7-r*c8hvx4qss ,v jdt 7ime(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 the x-axis following the position vs. :*akha5wic1 aunb z2v0ie4,o11pqkw time graph provided. Duawin2p1 awa,qokb :5hki0u4 *c1ze1v ring what time interval(s) does the mass have zero acceleration?


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