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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 constant speed around a circular path of radiumbhx601 elo r+tul e1-s $R$, 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 c ap-9o wgis8)vgt9ng0f/b3d w e5z. ndirection is cv)9t gp n0.wc9 gafbds3/o8 zw e5ign-alled

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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 aroundk( 5xki g,yh9i a circular track at an average speed of 50 m/s and then completes a second xk9ih ik(,5g ylap 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 t8j,wrca /.plahe constant velocity. If it continues, how far will it travel in 3.0 swa l8ar,/pj c.?

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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 s8y 8j. yrsuyf6 1czmu1liding at 5.00 m/s to the right across a frictionless pond. The boy then turns and startsyuz1r18y.u sc6m8 fj y walking on the plank at a rate of 4.00 m/s to the left, relative to the plank. What is the speed of the plank relative to the pond now?

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  97.18: A motorist travels 400 km at 80 km/h and 400 km at 100 km/h. What onr s wm67z,.w6e:vqym9 gfp2 is the avera . nmzwm6 2yosfw6gpe7:9qrv, ge 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 moti v87,kv nxy0muon of a toy car traveling along the x-axis. The graph shown below is a plot of the car’s velocvu0ny7 8k,m vxity 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 w)*qw v+z d:ikalong the x-axis. The graph shown below is a plot of the car’s velocity in the x di: kzd +qw*vwi)rection, $v_x$ 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-ax6/ k*gxk c2ea :yvphs,is. The6a k, 2yeh/ksgx *cvp: 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 vs. time of a duck flyingg.1a. yilwe5sda ql 6/56d hw*do.gda due south for the winter. At what point did the g. d wd o..aeq6*sya/w56a1didllh 5g 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 which shows the position anekv p3 i25nzs8d elapsed time of a car starting from rest and uniformly accelerating in a straight lin pe5nszik3v82 e. 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 htb, v+qajf46v)bd v8e.r)q krefer to the diagram below which shows the position and elapsed time of a car starting from rest and uniformly accelerati 4erk.qa+b) v6d)8bf vhq,j vtng 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 gravtfv 5:iki, :y2bj(xoph for an object with the position time graph si:tkjy,(i vvb:f5ox 2hown 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 toe6wxok*5xd m1 mu fp b93iv,k: the following information. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor a1d,k 5* oip:xw mk6 umb3exfv9nd 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 informat d o: y.*ygii,zx9v.tmion. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor .9z. yt,g dmo*ivi:yx 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 wis+y.k t0pzk7 w z;d zuyq*fx)3th 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 rewp *660,x0hgtsbydiksef0 o-+n nkb8 fers 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.
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 followin u:j1ry98cq1 q;;a2a dwgkjncg 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 t 3ixsa+( adjr5anq, -zahtq :*he following scenario: At $t_0$, two cars moving along a highway are side-by-side as they pass a third car stopped on the side of the road. At this moment the driver of the first car steps on the brakes while the driver of the stopped car begins to accelerate. The diagram below show the positions of each car for the next 5 seconds.
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 followth136-e)lm 5lpyv*w hg 3etj r9vnd,qing 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 rampoly guq7rk321z0pqc+.l w wi,, across a horizontal table top and off the table edge. Which of the following would best represent a graph of the magnitude of the ball's accelerationig2 u1lq.zp okc 0w7r+ y,wq3l 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 sls9vojuu ,3 2time for an object that is moving along a straight line. What is the instantaneous s9j3, lsuv s2oupeed 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 re tkdo; a.l ;fuu5w+909 xvxmbolationship between distance and time for an object that is moving +umufaxb x9 oo.;; 5vw0dt9klalong 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 with an 6dv+mpq5uu lffm,x17r nej3 1initial speed of 12.0 m/s from a position 10.0 m pfm 157 jvrq+ em,36 f1xdlunuabove 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 repnb 2q trnr:5pc57.3qow hv 2hpresents a toy car starting from rest and uniformly accelerating across the floor. The time and distance traveled from th.nqpt5 rrv 5:327bchq2 nwo hpe 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/vlth zko/ u.: uniformly accelerating across the floor. The time and distance traveled from thkvt./ hzlu:o /e 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 to.rzyb7srd3/vi /t px;gnf l 75y car starting from rest and uniformly accelerating g/i z; 7rd nspbxt./7lrfyv35across 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 position of the bnjtkg8q(p) d hho33xb((uya,all each (,ty (()gbhnqk3ao8h 3djpu xsecond 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 uniformly ay ky+,,7xv,y9:biw vxhq6 nceccelerating ball. The position of the ball each second is in, +yx6qc9 niv, ,:yvwbhexyk7 dicated.
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 clo 95* /qlrtqphpwn on a unicycle moving in a straight line is shown in qqt5 /lhprp*9the 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 movin g,(+a1gt0 h3rv ypsc55gh pijg in a straight line is sho1+yj5t5ih0c g(gpr,v a 3g sphwn 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 surfi5:/ wv.tw qvm1yn f-ld94scface 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 taaw4c :qmja:9u ble top for 10 seconds. For which time interval(s) did :qaua9mw: c4jthe 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 motion of a marble on 5amx zjmb9 yehriow46o sjtz+: 5lco;;)9 u/ya table top for 10 seconds. For which time interval(s) did zxbjlumy+;mooe/t i5wrhsc4yajo6z; ) 5 99: 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 mog -ns-yglf71 qqnl+ t2tion of a marble on a table top for 10 seconds. What is the marblnq2 g-1q s-f7gnl t+yles 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 unifo,xmncxkp +1mvp*q 2 g(wxjs2 f3 up(:wrmly from rest for 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 straight downward with a pkq9fb*z af7:nr:;+ wehxg8b 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 ixz: kg3q,h,wthe motion of an object moving with a constant speed in a straxkh,i3 z,:gwqight 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 descr6me8 g0v/ xa5sr7. hgazg r-ocibes the motion of a toy car across the floor 6hg av-e7.5zo xm/ra0gc8sg rfor 10 seconds. What is the acceleration of 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 the motion of a toy car acroshhcafm 62mi)pi0z a :*s the floor for 10 seconds. What was the total displacement of tz fa:i06mc h 2ha*mp)ihe 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 graf g7t-v 5dy+e ho2c9tl)vq -hn6s6mtxph describes the motion of a toy car across the floor for 10 seconds. At what times or time iev6 t- 9y mcql)+v7d-f6tthn 25sxgohntervals 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. Which.6nw7ewqa q r;+yne4wan qu6* one of n* 4+y ewqa.6wau6 wqnreq;n 7the following choices best represents the acceleration of the car?

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43#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  06.07: A car has the velocity versus time cu+ gwx*dox va;24a0w)kr d6vcsrve shown. Which of the following statements regarding its motion vx60s ;gwd d*vac4wo+x2a k )ris 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 th.nl kqe-it52dc3h ;iktu +)uue velocity versus time curve shown to the rigniq + duue.-lut);h 5ki2tkc3ht. 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, ai4 2iqtt87kthqp(5 tb tennis ball is moved so that the angle between the velocity and the accele7i hq85t 2 tpqbtt4ik(ration 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 and traveling toward each othej3 9.lana5jo bg 6 n5p0wdo,msr.jds low6j5 3 .5g,bnam0pnao 9
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 posigbq*) 6-9dyy9-t wqn8dagrei tive and incr8t9 y-dwna-gqrdey*6)b qig 9easing

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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 i0idh u oh5dm6s+8l5txtrjt7de +wi ( 2s

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49#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  16.18: For any motion in two dimensions, which one of the followindskwilyxc0:lxvfz* xjl 7j -f/26 e +7g choices identifies quantities that must have the sfclfy sjxlx elw7v +j7-dx6ikz 2/:0 *ame 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 movem :7so3m5ma jes $3.0\;m$ 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-time2kh 3rz,/)ago+ie clzon3 7 nq, $y\;vs\;t$, 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 total time T iqi59hypderx 8*j 4(ns uy(m k+n two parts. 9ym yu4pkd+q (x8shj*(re5in
• 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 stra1-ajvb du4 n nr5(ncl0c2bracu0o- 8bight track is shown in the diagram. The thick line represents the velocity. Assume that the car starts at d0 1j bvnca-c42 o-b u5lcra0n u(nr8borigin $x=0$. 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;s2zz-o (2 :arulla gh on a straight track is shown in the diagram. The thick lizllho: r2zs -2(g; uaane 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 thz)-y- mt hf9q7:5.oimq- ,)yugz nzvuexi/y te position vs. time graph shown. For what time(s) is the speed of the object) io,:-y vn y--hmqgz.fzuix y)eqm7uz/t9 t5 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 gi px:dz -kavk*nkl3nl 4ygf tx(*jj0 .8ven by the velocity vs. time graph shown. For which time(s) is the acceleration of the oby( :xf*8tdz3kp llxan n -kj*. g0jv4kject 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 undeq.ec mxy oo3 5(f0j:qpr the acceleration vs. time graph for a fixed time interval of an object’s motion, what quantity hasq xjc5o(qfp e0.3omy: been determined for that object?

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58#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  11.08: An object moves along a horizontal line with incresen1 h(u hkj30;48cmdniub8q anw:4qasing 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 l*-v; hd 2rdajin two parts:
Part 1: it travels a distance of 800 m at a constant speed of 4.0 m/s.
Part 2: it travels a distance of 1200 m at a constant speed of 20.0 m/s.
What is the average speed of the car for the entire two-part trip?

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.02:A small object is released from rest afud7 md8h)))(gle2 ccl1vn tqnd 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 reyd uc0 -9g,mbzaches 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 movingauk390m hp2ie q, xlt0 along a horizontal axis is shown. What is the total dm0ktq3i 29el,xap u0h istance 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 identific)e75h eig p* qkgn.yo6fn0 l440vj qmes all of the listed s)efe0gi p4qn c*jqy h4k.7 lgvmn0o 65ituations 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 3i.o n,btlfy+ u)+hx jv:aos(-j;sltalong a line is shown. The object starts from rest at time t=0 s. At what time(s) does theuas.+lj)-3i t +o,jtbl;fnv (y:xhs o object attain a maximum displacement from its starting position?


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65#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.17: An object starts at the origin and its velocity along a line vs. time is .:n7 an6+rx r3ajynuhgraphed. Which one of the following choices best gives the proper interval(s) of time for which the object is 6n.r jnhn7y+a 3:rauxmoving 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 t gsf9spevozgf+(4d* d( 3l* 08jtftfright on a horizontal track, each with constant acceleration. At an instant of t sp ft4sf3*dv8d*(jt gz9e(lff+t o0 gime, 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 nt hg9o:ti2-n2 x pv7na 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 them62r grcx(+hb following choices correctlyr(cbgr 6m2 +xh describes the relationship between the average speed of the truck to that of the car?


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69#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.42: Which one of the following choices bessvnx-oayk uxyk2 a-e+;2bn0 1t describes the instants of time, at which the cay nbnv yx; u0ko2a1+-x-e2 askr and truck travel with the same speed?

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70#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.30: Two cars P and Q, each start from rest at th:mcpj06)ds2b wu,1akgq;jr4 rhe y : je origin and will move along the x-axis. The acceleration vs. time graph for each car is shown. Which one of the follo ;pwj:u1d:c 0hak6eg,rj jq) 2m br4sywing 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 objodm z vd;rbt2cu 63y:s1wi*t) ect moving on a horizontal line is shown. At what time(s) is the object movyib *d612tvzs3uw mdc: o) ;tring 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 f6kbcn kx:: 3ghswujk gs:*+9qcq:ni6ollowing the position vs. time graph providedkk9g+:6qi:kqjs*:hs xwg3 cun6n:c b. During what time interval(s) does the mass have zero acceleration?


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