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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 pathako;ui/n- q r0 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 ti;f sv )jb 2s+q9f594rti xlxobme without reference to a particular direction is cat9vxb;4 io 9s 5)+js2qx bflfrlled

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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 vlhz13:c+aqg t66 pcotz+s+a around a circular track at an average speed of 50 m/s anct1h los+3gz+pv 6aatzc:6 +q d then completes a second lap at an average speed of $V$. The average speed of the vehicle for the completion of both laps was 80 m/s. What was the average speed $V$ of the second lap?

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  95.03: A toy car moves 0.80 m in 1.0 s at the constanh cpw uor atp;4/ mqyp:,r)y:9t velocity. If it continues, how far will i hwuryp9/yop:ap )rc;: 4,qtm t 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 3dv9b.cy9z( lr aw v5+otsdu;(0-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 of 4.00 m/s to the left, relative to the plank. What is the speed of the plank relative to t(sdla5t;w(v.zdyubc+ 99rov he 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 kme*h51 0 s5ab smixxit1 at 80 km/h and 400 km at 100 km/h. What is the average speed of the motorist on this trip5xsah ie* m51t1b is0x?

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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 t bb4d gmlpgk-p,+.(b)gxync 6 he motion of a toy car traveling along the x-axis. The graph shown below is a plot of the car’s velocity in the g bpl6+ xnkbg.bmg4c y (p,d)-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 travel14 +6b.piv.c pdpvhw,jskrx 0ing along the x-axis. The graph shown below is a plot of the car’s velocity in the pkps+0j c.4x iw .6vrdhp,1vbx 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 sm/* o gp4amcu8kw0h8car traveling along the x-axis. The graph shown below is a plot oskmu p0h8oa4*/cg 8wm f 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 grandgziuz sjbd0k*t/ia1;.88fph of the velocity vs. time of a duck flying due south for the winter. At what point did the duck stop i;ds1 /tzb*i8jfdn8 az0. gki uts 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 diagycs )s.h36y0d e myy/snez9/ 5xmqki +ram below which shows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. What was the avey9 /) ymc .0+nxh5i m/dys6 ezsysqek3rage 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 referhlhmxji 4qse3lw x - b+uc.8)1 to the diagram below which shows the position and elapsed time of a car starting from rest and uniformly accelerating in a-384 c q+).whhuijm 1esbllx x 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 velps5 e0lgicx)z-ip9q po+hs 1 3ocity time graph for an object with the position time graph shown in th-0sp) eplho q+ ip39cz5 xigs1e diagram at right?


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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  00.28: The following question refer to the follhy q +0v*cme( 4 bzxq)5(fkoubowing information. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor and rebounds to its original heightz5* ) 0fe4hbbq q(o+ cyuvxm(k.
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.:.n9a gps8fxpe4 hoq * An ideal elasta.eqp8n:opg*shx 94 fic rubber ball is dropped from a height of about 2 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 travel with a speedsgazm q;w44 bo-kj -ch1e2(nd 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 followind scz5y9+2w4 9.tbdyld i6bot g 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 xjdov bhcf :u1c7,hc :pc,.(vrefers to the following scenario: At $t_0$, two cars moving along a highway are side-by-side as they pass a third car stopped on the side of the road. At this moment the driver of the first car steps on the brakes while the driver of the stopped car begins to accelerate. The diagram below show the positions of each car for the next 5 seconds.
About what position after $t_0$ would car #1 and car #2 have been side by side?


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19#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.03: The question refers to the follob-m0 v :;2-msfxnvg kswing 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 refpjq 4(8u ,bgxrers 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 horizontf8;qip2;8 noqenl: d xal table top and off the xoleqnifn; ;d 288p q:table 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 relationsykr*nnl zg;:n*6i0 mfhip between distance and time for an object that is moving along a st *y6f*lnk; :mn0gzi rnraight 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 repred5rwvuuyj, s5ev.96u sents the relationship between distance and time for an object that is moving along a stru.rwj, dsvv e55u u69yaight 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 bf-.1p xld)cb initial speed of 12.0 m/s from a position 10.0 -p1bb cf. d)xlm 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 representd;as8c bw0* 3hpmxd8bs a toy car starting from rest and uniformly accelerating across the floor. h*pbwdc 88b;xsmd 0a3The 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 ,p xymc6hqc59 rest and uniformly accelerating ac, x9 cc5mhpqy6ross the floor. 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 r:kyxljxa5 e m,72tffyg+ 0+3l tu0 yskest and uniformly accelerating across the floor. The time and distance traveled from the start are showm2lt xa3f fst y:,g7kxuje5 y0yl0+k+ n 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 unif n;od7gxf+lm 8ormly accelerating ball. The position of the ball each second is indicatedgm xf7+l;8ond.
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 accelerating ball. The position of t2zk+u-tu zf42*j gr7g 2pwbh mhe ball each second is +2p7 42t kg2 hmgwz*f-u ubjzrindicated.
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 i: lgkprg md:j iu1ngrw+8mmx.4o; d - 4ohmx8;s s g po:hm:m d8 j8g44ko ;-nrxl+rium1;d.mxgwhown 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 utc9.*re eisn5gh b-y4c3jk 1 a circus clown on a unicycle moving in a straight line is showkn4j3 biu ece5t- c1h*sg. 9yrn 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 of the earthf3 zs+lfq9, vp,-o7 l/yn bxmz td+,wz

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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 onk io /(6r xy*t(ae1vkf a marble on a table top for 10 seconds. For which timeek/o(k xy(6 1v*na rti interval(s) did the marble have a negative velocity?


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34#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.12: The accompanying graph describes the motion of a marble p 7:ugdr t(yl+ chzza-g*4xa8*soja /on a table top for 10 seconds. Fo7(-/t4* ug 8dozpl a:*r+csgzaay xjhr 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 describes the motion of a marble oiz+v 0,nelwc5-yir* sn a table top for 10 seconds. What is the marbles average acceleration between t = 3.3 s and t = 3. e,v+i* cn5zw -yil0sr8 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 uniformly3xbh* siz5-o q 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 straigh..fymej(9cja t 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 could correctly represent the motion off i*3as.(k:) q,luoxsv sr/d t an object moving with a constant speed in ala,u sr*(q .) txski/f osv:d3 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 car across the flo9tg:emjx4a*;did wylb8 )zzrz/2 x - hor for 10 seconds. What is the 8hzze*-xjdyt4 i armw d9; b2g/ l:zx)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 motionk05dw yfp3g p7sv.g/haor h1) of a toy car across the floor for 10 seconds. What was theyr0w.v h /oa d)g5fk g1s3pph7 total displacement of the toy car for the entire 10 second interval shown?


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41#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.26:The accompanying graph describes the motion of qv, jf3aqx5y5 a toy car across the floor for 10 secondsx,5qv5qf yj 3a. At what times or time intervals must the net force on the toy car be zero?


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42#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  16.03: A car accelerates uniformly from 0 km/hr to 60 km/hr in 4.50 s. Which : v umln6zsn j9g+-4yzf(w/q+ h q1ayrone of the following choices best represents the acceleration of t:y(zvq9nfluzas/qjr41 m n w+g -6+hyhe 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 velocvqvt*ge,f3 c, ity versus time curve shown. Which of the following statements regarding its moti,g ,3 *tfqvevcon 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 movqud7,w. 2ey6 yr*mfnsd: i 6botpuu2q +x//utes along the x-axis according to the velocity versus time curve shown to thetxq6*iu27t d muu+ so/bn/r6:u.yep2 wy, d fq right. When does the car have zero acceleration?


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45#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  06.22: During an interval of time, a tennis ball is moved so that the angl (lli9 oyjqrm-uv0c(lq(x*za.) g -xge between the velocity and the acceleration of the ball is kept at a constant 120 degree. Which statement is true about the tennis ball during this interval of9v-qz y( *xc (gol.0uj-(qmll)girxa 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 ei9o+l-f )3mo znqj8uqrdpo u*z/*u m1ach other.mz qfzo)3 ru*1u*lm-9/d 8j q +upoino
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 ar-acn5. rbi e1(tt bek:3qfe)cceleration is positive and increasin)(5tfe e .3bnakec-b q:i 1rrtg

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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 ofvcj*1 q8ps i;s average 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 in two dimensions, which one of the following ch9c8uu pbz:b,z l ;5jwhmc*4croices identifies quantities uhz, mbujpbc*4cr;lc z: 8w59that 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 movzm. joj(q12ne +rmtv *es $3.0\;m$ 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-tx -+m;fv+xembd3m ng 9ime, $y\;vs\;t$, 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 totaw 8gjrz 1 k+fm50ickie+ hs9o:l time T in tw9j+wf 5gih1e: +moci 8szrk 0ko parts.
• Part One: The car maintains constant non-zero speed V for the first $\frac{3}{4}$ of the total time.
• Part Two: The car accelerates uniformly to rest during the last $\frac{1}{4}$ of the total time.
What is the ratio of the distance traveled during Part One of the trip to the distance traveled during Part Two of the trip?

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53#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  08.23: The velocity vs. time graph for the motion of a car on a straight :kj6bjgzt/ v; track is shown in thev kgt:6 zj/j;b 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 graphmq :wprp h+bcx wezx+) o+)l+5 for the motion of a car on a straight track is shown in the diagram. The thick line represents the velocity. Assume that the car starts e x+wp5brh w)+cz: +mlpq ox)+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 objecjr, +q-fx x)gzt given by the position vs. time graph shown. For w jf-xxg ),qrz+hat 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 bev74r9 la k:vry the velocity vs. time graph shown. For whichr 4v:9lvk7er a time(s) is 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. time graph for a52jkyz)s1 i lgmpx0a ) fixed time interval of an object’s motion, what quantity has been deterks )j50zg2malixy) 1pmined 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 am1a cphb- rgnslb-+ .w 9+bdn*long 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 parts: bso4h04u ael/xm0lz8
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 resi mj/lqfs/r7 g.eho,-x r gnyj1g/6.xt 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 reachesn0;,pyz x 1vps 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 horizyr;on um 5 e+1ggqqp7+ontal axis is shown. What isq; oqe7yg+p1u+g5n mr 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 following choices correctly identifies all odrg363l 2poykwxwbc.ei,85qwcv)z s9 n .t- mf the listed situations for which there is a non-zero t zyc- .d8wk9bcsgenwop )m6 qv332i. xlw5r,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 kj ndx, xyj//mw+(ni;shown. The object starts from rest at time t=0 s. At what time(s) does the object attain a maximum displacement from its starnxdj +y/mkw( x/ j,;inting 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 thekq/o* h1z kd-/ 5nitqu origin and its velocity along a line vs. time is graphed. Which one of the -k*uhzdnkio5 1/ qt/qfollowing choices best gives the proper interval(s) 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 cons ly/tu2 y;wg0ciptz.b ( k.dz6tant acceleration. At an instant of time, the information about;ylb.t /6gzp c .d kuywiz(20t 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 ab; u wgfku5..fah/(sz2rctl6 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 grapsp7l nr jt19n 3z:c3hvh, which one of the following choices correctly describes the relatioh9n3j: 7src31 ntvzlpnship 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 best describes the insta;*rg civgm1r+ nts of time, at whichig g+vr*m1 c;r 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 start from iw)xfbh.h* ejscv6)d: , l;hl rest at the origin and will move along the x-axis. The accelerl *;ecjdvfl b6h ,)h.xh: iws)ation vs. time graph for each car is shown. Which one of the following 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 horizontal line is s7 js0;v0,tvf q9cp cdqhown. Atq;vdjc7 ,tfvq0 s9p0c what 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 along the x-axis following the position v; 4h8nyn +6chcxi,e qgs. time graph provided. During what time interval(s) doe+, nqch x4n;i8 hgyec6s the mass have zero acceleration?


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总分:72分 及格:43.2分 时间:不限时
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当前第 题,此次习题练习共有 72 道题

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