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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 arobq+3bc7afto l;6q -jh zl+9peund 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 remr/f pc: l1iutf,3p cbj x8w81ference to a particular directit /j 1f b:,1lr xippcu8fmcw83on 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 lapyudtc9w4x3i +2p dap7 around a circular track at an average speed of 50 m/s and 4t y2i wca7d+93pupxdthen 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 moveshpo 9+y*1 x cn7evap,hk6mqc1oweu3 7 0.80 m in 1.0 s at the constant velocity. If it continues,a31w* ep,ouvnqh+km7 yc17 hp9ecx6 o how 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 station0m8wrg5bq+ zp ary 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 pm+ g508zbwrq 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. Whal rmrlb.6wfz k ;r0k- v8fl+0jt is the average speed o0 l ;6mkk0f j8z wlr+frrlbv-.f 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 traveling alongoniz: (go3 i8rl 5bc2g the x-axis. The graph shown brgioc:3bin glo28 z5(elow 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 motionroi( f-n a(of9 of a toy car traveling along the x-axis. The graph shown below is a plot of the car’s velocity in the x direction, oari ((onff- 9$v_x$ 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- 6rlcvo9m o:0tq .cqe toy car traveling along the x-axis. The graph shown below is a plot of the car’s velocityq r 69 clv:qt-o.o0cme 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 velocit ;5d*w4rkbadq 9ji0qd 1x6jfuy vs. time of a duck flying due south for the winter. At what point did the duck stop its forward motq9daq0 ;4w 1uj*6dbr5f kxdjiion?





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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 belcm)0i*vybk/ +y pr835 ydcrro ow which shows the position and elapsed time of a car starting fkc8ydry )rp+3/vy icm5r 0*b orom 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 which shows the p4 cd18glr4yv rf6c*sgosition and elapsed time of a car starting from rest and uniformly accelerating in a straight line. The average acceleration during the entlcc8 4yrd4*1fvg6grs ire 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 thbi nx ))jbl3ts8*/vake velocity time graph for an object with the positi)*aib x/s l8vjktb3) non time 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 refer9e-b lnig1 v fc:nfkx1(w26pk ,oe(rw to the following information. An ideal elastic rubber ball is dropped from acnxki e:pg6fk, 112w9b( (nve ro wlf- 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 / d4t--0/zadxyhlmgr u50 n9uiyx.un. An ideal elastic rubber ball is dropped from a height of about 2yxnx nrua5/d0 z-h/ yl0 dut.u9im g4- 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 t+;fhs+ xkup,ju+ j8 irravel with a speed of $v$ in still water, which of the following trips will take the least amount of time.

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17#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.01: The question refers to the f(: b4xn jcbsh-*gd15hics )st ollowing 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 f-ndsnh4 90rikb.n5 k/iuix .gollowing 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 following sbu8y+.jkta ; .)w oyond8rm7xcenario: 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 tjpk v nl/g s0b6md*pr e8i6j6-o 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 horizontal ti6g3) s49fy pjka:kj jable top and off the table edge. Which of the following wouldf jj)yj6k ika p394g:s 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 andrd 4qm5 dmck -jc745af tzt.9n time for an object that is movinddt 9.7q rn c4a mj5f5-4mkzctg 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 and time fdy.ip zb*:(io1an k,lor an object that is moving along a straight line. Between what ti* ybzo,k apn:ld1.i(imes 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 thr4, :wazxixaem4 , ,nbzown straight downward on Earth with an initial speed of 12.0 m/s from aa xe4x,4 w:,mzinza,b 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 uniforml9 bzq/8vqs *fk9t/e g dk;;efwy accelera/8qe*zf d;ts fkqwe /;vg9k9 bting 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 rp a a67)hsd4ntoy car starting from rest and uniformly accelerating across the floor. Ths4a) 6d 7rphnae time and 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 starting from rest ap a bt 0nhz+duxr29 eu)e01i;nnd uniformly accelerating across the floor. The time and distance travele 0e9dr+;u xp)0hte12au zinnbd 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 acceler*x4 u/;a21jrhfcd ceu ating ball. The position of the ball each*/a214decrfuc xhj ;u 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 uniform,vlp /a r(/kdpzt/2e:o/ xughcjsx7 6ly accelerating ball. The position of the ball each second is indiexc6/2pvh/zgjpx :o ru,7/ka sdt /(l cated.
Which of the following is closest to the acceleration of the ball?


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30#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.17: The motion of a circus clown on a unicycle moving in a straight line wk8 qv5kp9f wo1ld;8 zis shown in the gd1vw k;fq85 z8ko 9wplraph 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 cb7n ypgo34 x4gircus clown on a unicycle moving in a straight line is shown in the graph below4g3nxbgyo 47p .
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) :*:twwp j nsi/ 9chucjpp1n8 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 tabl3q3j;kc,(, bx jmjw gpe top for 10 seconds. For w;bk3 x(w ,mg pq3j,jjchich 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 gra/ /(0t0 p5-oy)twsfo vs fbe9dqjog6u ph describes the motion of a marble on a table top for 10 seconds. For which time interval )65fsp0t9ofqu/ oev swo j/ -gbt(0yd(s) did the marble have a positive acceleration?


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35#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.13: The accompanying graph describes the motion of a marble on a table top f ul0k9v0dey3tor 10 seconds. What is the marbles average acceleration between t = 3.3 s and t ukevl0d 3t 9y0= 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 resr*c a5.z *ztest 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 s-m0xmvymvaz7 +:v vdc487 n trpeed 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 cw czg6rpi zm).j 97h+norrectly represent the motion of an obje n.)zm+79zpc jw hi6rgct moving with a constant speed in a straight line?


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39#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.24:The accompanying graph describes the motion of a toy ya7ev5kal r fzpv40a0x6 cy,d 7b77vycar across the floor for 10 seconds. What is the accelera6by p5krfxyv v,0z ve aal7d7y7470cation 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 tolb( et.( b0, c4weqiuay car across the floor for 10 seconds. What was the total displacement of the toy car for i,e.u(wcel bba04(tqthe 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 ;tjirr 1yox00 ld g1a3of a toy car across the floor for 10 seconds. At what times or time intervals must the net force on the toy car 1j0aidgxl 01r3 yt r;obe 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 k48;tgg4y iks9fq+6j)yjmvi u m/hr to 60 km/hr in 4.50 s. Which one of thjg4fi6 kgyi9 mj)4uvq8;yts+e 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 curve shown.o (9ny ccgrgn6v. 3kdfcx* :+a Which of the following sta9x gand k6oc3v g+ c:y*r(nc.ftements regarding its 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 ac7 wru6s46hlls,c: qblong the x-axis according to the velocity versus time curve shown to the right. Whw6rb q6csu:74ll,sc hen 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 t 65cahrf ktob )x2c yx a;0btx-7bcf97ime, a tennis ball is moved so that the angle between the velocity and the acceleratif76fk9x c cb a)r;o5t-axbb 7xh02ycton 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 y) :sjo7r4xcq150 kilometers apart and traveling toward each other.oq)4 s:xcyj 7r
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 mov+mt3 2wqxs,ecad un((7 vy0bi es on the x-axis. When the acceleration is positive and incrdm2 wytv q3(c+u(i7 e0nax b,seasing

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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 velocidme3wmn+ rh*; 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, which one of the followin7c*p ut9a9hs hzl.z2 d1 )uhndg choices identifies quantities that must have ts hlua91.dz* npht z97dcuh 2)he 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 moves zid1o 9akd*b 8k.:izw*t(um i$3.0\;m$ 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, c6tpy6 k q6c/v$y\;vs\;t$, 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 a2* f6ne ehd 2w9hyig, 2lncausi6 k)u: one-dimensional track for total time T in two2*fs ,)eu y22:hehaknuigl d ni96w c6 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 +wgepzyzy-l)i -+hn(8 rjv6w the motion of a car on a straight track is shown in the diagram. The thick line represents the velo- yrwle +gzinyw (z-v8)j ph6+city. 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 vw2uhl 4eg(l p gt)58 wunv9s0js. time graph for the motion of a car on a straight track is shown in the diauhus el p wtlwg )0j(g5v842n9gram. The thick line represents the velocity. Assume that the car starts at origin $x=0$. What is the average speed of the car for the 10 second interval?


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55#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  09.08: Consider the moti2n uaqha73uo;on of an object given by the position vs. time graph shown. For what time(s) is the speed of the object greate3u7n 2uoq;ah ast?


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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 ob h8i xs g s4+ehgvf7vkp37,pk7ject given by the velocity vs. time graph shown. For which time(s) is the accelpssf4 vk ,3x kpgiv7e7 h7g+8heration 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 accelerationtkci q 49fp+lf6j4oyzzd8 ;*fmq 7fg9 vs. time graph for a fixed time interval of an object’s motion, wdg4f t6p*ik y7fzfqcz9 ;8jm lo +4qf9hat quantity has 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 t9*+d05l g9o zntgi0n4;m i,lbws nsua 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 or 0a3*8g e mx+um7sdqtwo 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 objectb/*xls)tv hq+ s hh)8j is released from 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 andh 2)vw buinxm o)c,+t ir+;pf) reaches the ground in a time of $2.50\;s$. Neglect air resistance. From what height above the ground was the object released?

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62#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.17: A position vs. time gr 4 4dx28jwo* ziotf(ev;e3ggwaph of a particle moving along a horizontal axis is shown. What is the total distance traveled by the particl2i f8;e3ot(*w d z4exjgvgo4we 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 foll-i)a;fj i j+l.+vc ip2c* npcdowing choices correctly identifies all of the listed situations for which there is a non-zero accelev d)c+i j;pfl2ni+.* - paccjiration?
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 acceleratii9g sfcpm wo) k)q ./4+px5sh sra38cxon vs. time graph for an object moving along a line is shown. The object starts from rest at time t=0 s. Atq) 5p + sfkc4r sc98/)ax3.hsxgowimp 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 and its 1/ sbzjc abj z2-6o4yyvelocity along a line vs. time is graphed. Which one of the following choices best gives the proper interval(jz6 y-2c4a bj /osby1zs) of time 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 with con7wauct6q(ujl z5); hrstant acceleration. At an instrl)jthw (z 6q7ucua ;5ant 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 8 ne/b 97w1*coezp9u sclw3nsposition $x$, as a function of time $t$, given as $x(t) = -15 - 25t + 10t^2$. Which one of the following choices represents the magnitude of the particle’s acceleration? All quantities are expressed in base SI units.

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68#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.41: For the entire time shown in the graph, which one of the followingtscx2)6w/ +tb) h v)tvkiwa;o choices correctly describes the relationship between the average speed of the truck to that oo xti)/ 2k)twsvb6wa)+c;vhtf 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 chvgbzqz *y5;j( 3h0ss uoices best describes the instants of time, at 0sh;3 bqjzu(z5ygs *v 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 Q, each stl/b-bagk p8rj9zu g-isu ./ n9art 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 choices correctly identifies the relationshiul/- ra/i - 8u.sg zgpk9b9njbp 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 horizontals3kr2ehob/w7w c )*nc line is shown. At wh*rs)wc oh b 3wc/ekn72at time(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 alogra iv (7ph1:-,yor gu:u e 5yp49y0opmmdw2mng the x-axis following the position vs. time graph provided. During what time iado4um0p:u(,p9 g75yiho- 2em 1r ypgvy mw:rnterval(s) does the mass have zero acceleration?


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