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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 arou1zr*6gt3f uic nd 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 wbmxf +.l w:q (tu:q7greference to a particular dirubm 7w:(qt.w l+qfxg :ection is called

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  12.29: A vehicle completes oh bj/+8*k+ ixk 0jran1tjlx4 kne lap around a circular track at an average speed of 50n+a 1x/ jx8k kjh4l*rtb+ji0k m/s and 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.my9 1d-kfi eh*; cwpo 1.0 s at the constant velocity. If it continues, how far will it travel he9-o. m1w*dpc;y kif 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 bv;)leu9 vsh d..a4cg3.ju mb at 5.00 m/s to the right across a frictionl .be .j ;g)cvhlsdu.3b9a4umvess 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 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 tr9g mqc:l ncn6qu)6ez l61ywa+avels 400 km at 80 km/h and 400 km at 100 km/h. What is the average speed of the motoristly g6nlu+66wm1e) qza c:q 9cn 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 tiib6 jgqj5s 51o the motion of a toy car traveling along the x-axis. The graph shown below is a plot of the ca65sjij15 qig br’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 revw9 7binnattbn(3i l 9wxk k3-u3oh7 9fers to the motion of a toy car traveling along the x-axis. The graph shown below is a plot of the car’s velocity in th nw9a( ukb l nkvb79oih3nt73wx3-9tie x direction, $v_x$ versus time $t$.What was the acceleration at 33 s?


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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  97.22: This question refers to the : d5fha /h0+5hejl mjfmotion of a toy car traveling along the x-axis. The graph shown below is a plot of the car’s velocity in the x directfh :5efad0lh /hjmj+5 ion, $v_x$ 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 ducltvxxo t 80e36k flying due south for the winter. At what point did the duck stop its forward mot80e oxt t6vl3xion?





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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: r ck;q/47c 1q-wuidol8 sgiz position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. What was the average velocity of the car during the lqoccd7uigi/-r 1s8z:k ;w 4 qthird 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 shoq9 t 0vw:grnie f416jvg4-czgws the position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. The average accelr1 g q4g9cg6w: vjfn0-vezt i4eration during the entire 3 second interval is closest to


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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.20: What is the shape of the velocity time graph fio+ /h( n: *7aognt,eznk+ahcor an object with the position time graph shown 7ez,+g n(thocn: ao*n/a kih +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 to theym/5xvwv1l l)v5ml(ne8 6 nhd following information. An ideal elastic rubber ba 1ym6v/n8) xev vm (wlldn55hlll is dropped from a height of about 2 meters, hits the floor and rebounds to its original height.
Which of the following graphs would best represent the distance above the floor versus time for the above bouncing ball?


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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  00.29: The following question refer to tg*o j8y:5 ,xz nb;gprshe following information. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor and rebounds to its o b*5:rpng8,ozgxj sy; riginal 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 spee86r5h: w/vb9 ssiy lt, iuic.qd 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 scewk 4 ly5e*;mdfo4n(f snario: At $t_0$, two cars moving along a highway are side-by-side as they pass a third car stopped on the side of the road. At this moment the driver of the first car steps on the brakes while the driver of the stopped car begins to accelerate. The diagram below show the positions of each car for the next 5 seconds.
During which time interval would cars #2 and #3 be moving at the same average speed?


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18#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.02: The question refers to the following scenario: A 6)vv wco;h)8h 7idytpt $t_0$, 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 followingtvt80c wbw20z)x gxyve u+, v:6c:nf s 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 f nt- jna4 (e9bhco-b(refers 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 *b)dr/ kn,b wu2pjm4z, across a horizontal table top and off the table edge. Which of the following would best represent a graph of the b 2 u nkrwb/)d*pm4jz,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 c k* -i0j go78-sjhstnrelationship between distance and time for an object ths8*0itj- k7n gcj o-shat is moving 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 distanced lhphyi 0-q 6u6a(e*e and time for an object thae6 e hqa0-( id6yhlu*pt is moving along 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 8:-t ph+ k ga/wss+tpo;aczy *Earth with an initial speed of 12.0 m/s from a position 10.0 m above the ground. Ignoring air resistance, the speed of the object when it 8/as hy; gw z:pk+at+topcs-*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 toi6k, e*oh/3h v98qq kplmcif 7y car starting from rest and uniformly accelerating across the floor. The time and distance traveled from the start are shown in l ,piqof9 q/hhe vk7km 3i6*c8the 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 res uis /i-1opkv b0b+9 qcxowg5.y;clt4t and uniformly accelerating across the floor. The time and distance traveled from the start are shown in tuipxqk o1wos b-ilc54.vy+0/ g;9cb 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 uniformy h g9dj- jjgo-0oz9y+ly accelerating across the flooz h-jgyoj9g d+ 0-jyo9r. 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 bfab)6 so+s h1+vl7.w9vz h*o+myp jwy all. The position of the ball each 1py z9v msla+vb7s*j f w)+.6howoyh +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 uniformly accelerating ball. The p+ fj:)jg6*lbauxvla /ig, d;j osition of the ball each a:6ibu,ld)x jvjfljg*g a+/;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+ql)fcd.8:dhqcy f70fyw l o. a unicycle moving in a straight line is shown in the graph be.d f07q hldwfyqco+f:cl8 ) .ylow.
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 moving in a st9io c camwdb7p *zw;t6:0sl r5raight line is shown in the graph bcta 6pm :i9oclr*w5db70z;w selow.
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 eaw-jb p9noa0 eup xjy+l3, +s)irth

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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 dev rs9, a7bkb-escribes the motion of a marble on a table top for 10 seconds. For which time intervasr v-,kb7e 9bal(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 ;z xk10bw:r,+cta 3x rg.jse zthe motion of a marble on a table top for 10 seconds. For which time interval(s) did the marble have a positive a ,xxrj+;3.kwec : zaszgb0rt1 cceleration?


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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 tabnv/ bb.uxpadgv,cka. 0 *)ta4le top for 10 seconds. What is t,0n4a ad *gb.x.v a)cpuvk/bthe 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 uniformly fr+p 1dzi/tz n7yom 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 of 0ywx.l,pn c n-$20.0\;m/s$, 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 motioc+ bw eg0967zbob le9gn of an objecewebb7lcgz60 g 9+bo9t 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 descri-1 xro3vg9;xnp b4t zdbes the motion of a toy car across the floor for 10 seconds. What is the acceleration of t1 4 ;3bzpvxtrd gx-o9nhe 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 ar)vmsaf 8 )g ioae13m5cross the floor for 10 secondsri1) mea8g )o 5vfam3s. What was the 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 a toy car across thgqk(w(5 ;a3mi l)1mx)svjg nfj:e *j ue floor for 10 seconds. At what times or time intervals must the netq )mmj(;e: 1x i5 *f3()jkslanvgjwug 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. Wo3 dppxt 8f:*8l/o62dakp hn s( o7waohich one 3o8 wpdp (s* 6oa :a/fp7o8 hoxtkln2dof the 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. Which of the followine1z2 j prbjc+6 out,* kqpk2)yg st bt)6u2 cyjp*j +zk oe,k2rp1qatements 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 along the x-axis according to the veakd4bv z 7-it widx-;g 30(ohvlocity versus time curve s aokg47i-h;(-d btdi3 w vx0vzhown to the 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 tef6qgw-vv/c 6(l ,w lnmw.k /vunnis ball is moved so that the angle between the velocity and the accel,6cvuqlm/v6l.w(wvwg - f/nkeration 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 k(6tko -zmo3)788*jvq z vem2gqawswbilometers apart and traveling toward each other. t8(q o w qo8v-z6z*a 3bgwjsmvk)2me7
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 qwm-aoy :ny-5+ vb*xw;vq)gdis positive and increaqgbw y5 vw m)-*o:v;axq-+yndsing

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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 aver6rfiiykfm2 )m9mg*fq1d1,/h. odhis kub1 4xage 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, o;hi-:4vnt ,bkj 1 wyowhich one of the following choices identifiytk wn4: vi-jo1;h ob,es quantities 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 movesfiua/.kwo/ce-4ygp0s4)n:fe hubtym 8s( .n $3.0\;m$ 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, eh 7g6x.n f.3onqsd+c$y\;vs\;t$, 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-iq 2 tk3su 4ai/gtx3a(dimensional track for total time T in two parts.4a3k/ sixit a23ut gq(
• 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( 4gq*xedrngby .t-n. of a car on a straight track is shown in the diagram. The thick line represents the velocity. Assume xrb*g(e. dynnq . 4-gtthat 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. timee: iqsa7fy4z*g g;7w: rkd /lb graph for the motion of a car on a straight track is shown in the diagram. The thick line represents the blky/ dia;qwz* 77g:s:4gfrevelocity. 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 gkc99 .np ;w(h,:i xg)f4 zp*ginbj usuc y6/boiven by the position vs. time graph shown. For what time(s) is the speed oub6nkg. ;spp)9h( yj */cb uow9i gicf4x,:nzf 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 jqagtm:1+-/ewaq n8y motion of an object given by the velocity vs. time graph shown. Fnej/ty-w m1aq +a8:q gor which 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 vb;d, mt trt:6s0rmk m4s. time graph for a fixed time interval of an obj4 tmsb:6md,kr;t 0rmt ect’s motion, what 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 a horizontaz (kgjf t.m.lfo3x:uew+( tq+fd )-fal 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 parnir nn 3)ju c63ir8r,kts:
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 f)68p+7p.uhfwyz h a6 *wwi jkprom 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 re30gb5rnfr.j ) hh1 zagst and 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 kms;uli jc 29ye,n 7f6ufq1t+along a horizontal axis is shown. What is the total distance traveu,u7 ykef j2 c1t6+qsi;9mn lfled 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 correctl*-bmla(w /qito3 s n)oy identifies all of the listed situations for which there is a non-zero acceler (/ot bi)aw lmq3*sn-oation?
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 sho-qcj9av8h*d(oo* myv wn. The object starts from rest at time t=0 s. At what time(s) does the objec*-od* v (h98yocqjm vat 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 m*t t/ s0/ha* lumfm8vand its velocity along a line vs. time is graphed. Which one of the following choices best gives the proper interval(s) of time for which the object is moving away fro*/0um/fashtlv8 t mm* m 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 t4,n(yuln)jnyi*+f4m1rpe i q o the right on a horizontal track, each with constant accel4)m +pi irq,n*y1lf nuy(4ejneration. At an instant 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 posit ,d70smg8sg2 u zlvn/hion $x$, 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 *ac* 1mkkqdmu (qyif9 72x*opshown in the graph, which one of the following choices correctly describes the relationship between the avm9i uq(*y o ca2x7pmkf*q1dk*erage 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 f35slolzf v7 0mollowing choices best describes the instants of time, at which the car and truck travel with the sam mfvs7lz5l 3o0e 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 s w2 n3ahpf.q x9y-5gystart 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 relat y2aw3yx 5shn.-9 qfpgionship 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 ,r0 wwvy59l,jk 1a j woicpxn-7q;ech:(yuu/of an object moving on a horizontal line is shown. Awe on( 01jy;h7-rw:9u5/cqcp ,jwxyu,vkla it 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 al,.w+cpr*z h.fat v2ghong the x-axis following the position vs. time graph provided. During what time interval(s) does p .t2*vg+hrwz. hfc a,the mass have zero acceleration?


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