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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 ng du.e( +)(fl tbv6jqc8: e;6i sgeuoof 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 wiawk *tai7r7j) thout reference to a particular directionwj)i ka7ta*r7 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 circular track at an average speedb91oee3o 849ubo lgflu 8ak p1 of 50 m/s and then completes a second lap at an average speed 9ukoo1l p43o gu a b9e8f8l1beof $V$. 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 )..pqcmo4jdf fdn a3tb7 cq)6 1.0 s at the constant velocity. If it continues, how qf7d6 4 j. .nd)pq)cct3bfao mfar 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 5.00r . yq 1waydhc( ,,r5akluxf(+ m/s to the right across a frictionless pond. The boy then turncd .l rkwar,1(f+( au5,yyhqxs and starts 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 4 *qomf zeumi,v)b k.;mr,y0b:00 km at 100 km/h. What is the averagbyk rvqmz m:,u*if)e m bo,0;.e 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 motion of a toy car traveling along t4fa8;0noq;em pi .pcp(ztb jr3si h.,he x-axis. The graph shown below is a plot of the car’s velocity i b 3, pp.t;m.8hrc4;najf (iz0sopeiqn 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 toycc,*u0g +; pfodfktqpw;+fogp 03 9pr car traveling along the x-axis. The graph shown below is a pl;3p k ur p;c0wptd,fq oo0+fcf+9*gpgot of the car’s velocity in the x direction, $v_x$ versus time $t$.What was the acceleration at 33 s?


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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  97.22: This question referuhllka -*kecl/-zl)sun ( 5, rs to the motion of a toy car traveling along the x-axis. The graph shown below is a plot of the car’s velocity i-ll 5au ,kz*secr llh(nu/k-) n 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 velocitl z/ quvq1)r,oy vs. time of a duck flying due south for the winter. At what point did the duck stop its forward mvr/qq )zu ol,1otion?





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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 refers5ras*(( gjrja g lsv-a+(i.h to the diagram below which shows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. What was ( jvg-(*hjgars i+s(arl5. as 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 thm2js7z 5nz6lp3d 4tdiagram below which shows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. The average acceleration during the enti6t7n sj3 2m dhz4zp5tlre 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.cz/z lah +:sww-7yjzmfl;1b velocity time graph for an object with the position time graph shown s y;7lj-1+m :/lwzzbca z.whf 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 tcv13zfvo wk**,8x9 ykqv0qlc m6 9jb ho the following information. An ideal elastic rubber ball is dropped from a height of about 2 meters, hmy j zqvcx ch9wok1qv *03 8kb96f,lv*its 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. An idea,z- yrx:/ axpel elastic rubber ball is dropped from a height of about 2 meters, hitspayr-e xx:,/z 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 canyt0ipzpkn5,3se2m h . travel 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 following scenari) xgtgqy ali7 w5 qb0re*q72y0o: 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 fol1c klfzpkz 6 5m*wbkxn)(5*,zuex+ fmlowing 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 refep;4yt0l 4jauzw39cm mu p48l frs 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 r4dfrffz fhz 3hp :r73+mt lz2app 42a3efers 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, a+cjtm )z)of6 pcross a horizontal table top and off the tablemj tzp)c+fo) 6 edge. Which of the following would 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 relationshipjf5a+ d;r+ cq8.)z a yehgfwj6 between distance and time for an object that is moving along a straight line. What is the instantaneous spe8;jfghzey. rq wc)+6a5fj+daed 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 relationhbchae. 5 3xz81 ez*jpship between distance and time for an object that is moving along a straight line. Between what times did thj1ace8 bz. z5xhp *e3he 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 oo e(em;xfix **n Earth with an initial speed of 12.0 m/s from a position 10.0 m above the ground. Ignoring air resistance, mi;xx(*oe*fe 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 edgycd 4 b*,n y)6cx)erd 54artoy car starting from rest and uniformly accelerating across the floor. The time and distance traveled,c*6 4)de becg )rdr5ynxyda4 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 representk3z/(g l(q8l-x4ie- tm zp sdvs a toy car starting from rest and uniformly accelerating across the fdz(q/-xlsgz vmt-l kp 3 e(i84loor. The 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 and uniformlya36rdd1bf bq2gt/wy 3 accelerating across thew/da yfqtb63b dg3r21 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 positiofj( zspq (wd:x j*7u3un of the ball each second is indif(3: z*j7 (u jsxdpuwqcated.
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 un7ae4yz lay9 77c+c.zx 6tdrxgiformly accelerating ball. The position of the ball earalz y679xcey.7d g4 a+ tzx7cch second is indicated.
Which of the following is closest to the acceleration of the ball?


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30#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.17: The motion of a circus clown on a unicycl5+9gap sc 3rsa2 yikw.e moving in a straight line is shown in the graph below. s c k53a+yawr.92 gisp
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 cl blg;iv. tdzls be5. ;2 dhzuj2o 9rc8t:+4ebrown on a unicycle moving in a straight line is shown in the graph belowslbul;4ed;5j .bz9z.22trr ihbcd vo8 :t+eg .
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 n44usdfbc9 r :4lj*zveear 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 7tr6yky1 4ywl on a table top for 10 seconds. For which time interval(s) did the m yry4t16y7klw arble 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 a tableft5c mjk-n*hnrfjl8e -o)d ks5 ,l /w+ top for 10 seconds. For which time interval(s) did the marble hams8etl-kl) kh ro jn/f*c d-w+55nf,jve 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 toma 8rnfde9e2 rtl -r 7sjrp7*1p for 10 seconds.rae sd-9ejp12fl8rr*n 7rt 7m What is the marbles 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 unif002 ixazpk (rzormly 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 speed ogypa /5*trze5aez65x h ve(;rf $20.0\;m/s$, 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 cou3htfoxxcp.xq g(54 ;bld correctly represent the motion of an objx4 pt3ofqhb5x;cgx.( ect 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 describ dww4 uv3s :njok9) -5f)omojses the motion of a toy car across the floor for 10 seconds. What is the asw9) u kd4ojomsw-v5n) 3ofj:cceleration 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 d:)boca j 7j,*grdbc 2mescribes the motion of a toy car across the floor for 10 seconds. What was the total displacement of the toy car for the entire 10 second interval s cb 7rca)gj,b: 2do*mjhown?


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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 mk-l*ivjk aq6ubk2 *g9o ty ,21xgur0potion of a toy car across the floor for 10 seconds. At what times or time1t q9igyuak bgvup6,kxj- 2ol*2r 0*k 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 to 60 km/hr in 4.50 s.l h* pu(k5zoalroi):t; vir98 Which one of the following choices best represents the acceleratpr*l(vik8: 9u;o z o5ia)hrltion 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. Whiy 5l:ghncejb9so 59x9czs(q/ch of the following statements regarding its motion is NOT CORRECTnq 99lszocs bxyj:(cg5h95e/?


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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 t o)fm//*6o axkfk ympfx:nh v12y.jy(he velocity versus time curve shown to the right. When does the car have zero j:fhx ypm26 *1o.x )yakf(/kvyn mf o/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 inte10 tr6d6 de -sf/aruserval of time, a tennis ball is moved so that the angle between the velocity an6/1sudasrt6r edf -0ed the acceleration 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 ap 5fj7fj pv 3txj+ 8ljw1xd;(jqart and traveling toward each other.;jqx8fj(fj jt7xj+wp d 531lv
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 aclvf .w ,lyj7ot a590exceleration is positive and increasi fla5tyw,97o.v x el0jng

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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 ave/mrvz) m:np yv 7 9m)ojk4a(u5hf i/morage velocity 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 i9 1twfs50k v1aqfkbz4i9b +aqn two dimensions, which one of the following choices identifies bts+4f9w59kifkba1zqq a 10vquantities that must have the same direction?

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50#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  09.17: A toy car moves,:4 kw a)nlofb $3.0\;m$ 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-(6v sture*y1dcb2l: ctime, $y\;vs\;t$, 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 ay)o tsw3h.jtjt2s7g- v 16 rlmlong a one-dimensional track for total time T in two parts-2v1tty6o wjsl.jsg7m rht)3 .
• 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 v bkh4r 4pu4+h eyczo1;s. time graph for the motion of a car on a straight track is shooc h z4yh+441p;beurk wn 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 a straight trz pp+vo6 ;ou5/(xh vhdack is shown in the diagram. The thick line represents thdohp 5(u6+p h vz/;xvoe 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 objectfsqmwy/ , ;,np given by the position vs. time graph shown. For what time(s) isf;,n/sp qy,mw 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 me+poo+)bs5w tup2 (6n 5juxcm otion of an object given by the velocity vs. time graph shown. For which time(s) is the acceleration of the object equal 2n)ot5+ wp upo x+ b(umjce5s6to 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 area3c:+pcb2d s dz under the acceleration vs. time graph for a fixed time interval of an object’s motion, what quantity has:z+bcd3sdc 2 p 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 lgwq1g 7n3sj lp6(the 7ine 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 twohg3(+ n 9bg qw5raoaj: 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 froysrbe16ez9 t yxy zg.-v-;b*xm 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 a j53wl bnkl;io( 0igw-nd 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 graph of a particle moving along a horizlk2+ 36u,xq (hcdoz keontal axis is shownxkdkce 3qo2u6hz,+l( . What is the total distance 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 followiouiw.,2ye/ rbid ;kc;; w9bmhng choices correctly identifies all of the listed situations forb iw.oyebdhwri; 9;2k/ ,u;cm 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 va,:ml+siqyn -c mga0 h, ,6uyshown. The object starts from rest at time t=0 s. At whac+:y,,q i-ymnva ,g6a s0 mlhut 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 a ling kcl7*w:sn)r e vs. time is graphed. Which one of the following choices best gives the proper interval(s) of t)cwk:*ls 7nr gime 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 t.5jw q5du 2gd:y6e* lcoqpj (jp f5lh4o the right on a horizontal track, each with constant acceleration. At an instant of time, the informatwc jdlq of .hlu(:pej 4p55j25 d6g*qyion 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 pobv5 jw nedtto5 +93sc)sition $x$, as a function of time $t$, given as $x(t) = -15 - 25t + 10t^2$. Which one of the following choices represents the magnitude of the particle’s acceleration? All quantities are expressed in base SI units.

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68#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.41: For the entire time shown2-4gn)cz5wlzjr zjl( in the graph, which one of the following choices correctly describes the relationship between the average speed of the trucllr gjz 2wz- c)j4z5n(k to that of the car?


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69#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.42: Which one of the following choices best dhz y9xwi)qz+ bz)(7g wescribes the instants of time, at which the car and truck travel wi7hzy)w zbx) qz igw+(9th 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 ao hr, d;y)lsg,zf /.hlt the origin and will move along the x-axis. The acceleration vs. time graph for each car is shown. Which one of the follow/hy , o.)rdlsg,hlz ;fing 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 graphqno60xjf 6pm;a1 : awk of an object moving on a horizontal line is shown. At what time(s) is the object moving with its greatem6ok 1:w afq; 6pj0xnast 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 47bofu+y 4 qwqqx5p:egraph provided. During what time intervawboy 4uxe7 fp:q q5+4ql(s) does the mass have zero acceleration?


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