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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: 匿名未登录  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 pcfv*6b 2b;x) z4b kir.*dmdgkath 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 withlxx;81hpu(p 6onw od*out reference to a particular directpnw;o( 6 xh8d*ulo 1xpion 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 -tqe0g3 e)sskaround a circular track at an average speed of 50 m/s and then completes a second lap at an ave0see s- tqk3)grage 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 0.0ssx 3xqdzr .ni93k-b7iti7d 5if mo-80 m in 1.0 s at the constant velocity. If it continues, how nxi7m -bkxto3q di7s0 zr5i3.di -f9sfar 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 thatfr d0n8 7mh0( kaer+wt is sliding at 5.00 m/s to the right across a frictionless pond. The fek( drha0nr+mt0 w78boy 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 travels8n s :/;;cyre0lccwte 400 km at 80 km/h and 400 km at 100 km/h. What is the average spe;c/l0t8ew c:sry;c ened 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 the x-aj) o;yhw y:b2zxis. The graph shown below is a plot of the car’s veloch2b ;y z:yjo)wity in the x direction, $v_x$ versus time $t$.
During what time interval was the car moving towards its initial position at constant velocity?


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8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  97.21: This question refers to the motion 1ij9lqrf c ud5 58uxq7xy3 :ppof a toy car traveling along the x-axis. The graph shown below is a plot of the car’s velocity in thery9lxxp q1 uqj3d:f8p5u i75c 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 motion of a toy car 4 +oq7afy.krc73atp ltraveling along the x-axis. The graph shown below is a plot of the car’s velocity in the x direction,pc+7.yak43fq al7 tor $v_x$ 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 ve18) diknv3 r1-nvbkh qlocity vs. time of a duck flying due south for the 3rih8n nv)kkb qv1-d1winter. At what point did the duck stop its forward motion?





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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.17: This question refer to tqsq q6si0 q.i1he diagram below which shows the 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 third se60sqi qq i1qs.cond?


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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 wn +f2sfg-r-lz c:t:t shows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. The average acceleration during the entire 3 second is+-t-lrwtgnfc2f:z :nterval 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 tim u(b0b j/)c( m)yisseus5aj 2ue graph for an object with the position (ms ua/)ju uybe2c0i )bj(ss5time 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 refer to the 5hisqtz-)cuh94ua ,qfollowing information. An ideal elastic rubber ball is dropped from a height ofhztu ac 5is4-qh9)qu, 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 questil :;-4vrf 8ldf4jsj pson refer to the following information. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor al4v l;dpj:jsr - fsf84nd 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 speen aqr*g0px eyo k-r3+,d 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 refero ;p- ooo:lje1s to the following scenario: At $t_0$, two cars moving along a highway are side-by-side as they pass a third car stopped on the side of the road. At this moment the driver of the first car steps on the brakes while the driver of the stopped car begins to accelerate. The diagram below show the positions of each car for the next 5 seconds.
During which time interval would cars #2 and #3 be moving at the same average speed?


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18#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.02: The question refers to the follr qj3va)u e6vpn: 7wq:owing 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 scenario: +wc)z1 dyr zf9 t)j6wuAt $t_0$, two cars moving along a highway are side-by-side as they pass a third car stopped on the side of the road. At this moment the driver of the first car steps on the brakes while the driver of the stopped car begins to accelerate. The diagram below show the positions of each car for the next 5 seconds.
Which of the three cars had the greatest average speed during these 5 seconds?


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20#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.04: The question refers to thk2 zcn6 (da97cflr:fh(-v2w 1zlakcwe 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 +d-rzj4 myk jub; rx a xt5y:p3(dg,v+horizontal table top and off the table edge. Which of the following would best represent a gra-jbz;d dxjk3vut+gy: x 5ay(mpr4+,rph 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 represnr ci9.hn;2a9uyp x-fents the relationship between distance and time for an object that is moving along a straight line. What is the instantaneous s92xn9 pca-y iu.;hfnrpeed 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 yok p2*-xe ftee)c-0prelationship between distance and time for an object thatp0x2eo)c- e*pkey tf - 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 t3 jn 5g*g(sjethrown straight downward on Earth with an initial speed of 12.0 m/s from a position 1t3n gsj5 (jg*e0.0 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 f5(g:j q usdo(hrom rest and uniformly accelerating across the floor. Theu h s(dg:(5jqo 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 toyela4 o 88riyrq:9qacyx/c:ni ; fa )+y car starting from rest and uniformly accelerating across the floor. The time and distance e ;al)x ry+racyo/aqy8inc48:fq9 :itraveled 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 cr (dbqf9i 1v5flq( mit8rql8:ibp*j5ar starting from rest and uniformly accelerating across the floor. The time andffi 8br9:(q8jp im5*rqq(iv l tbl51d 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 bf, k0:.yt5z5jkpnmxg all. The position of the ball each second is indm tzpn0xyjg:kk5,f5.icated.
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. *l1 *twu.gdai afi,s 1The position of the ball each second is indicated. ga.ls*,*1ifut d a1wi
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 is la/1wyqom4km7bl27 sshown in the grwlmas/7 bl4q 1yo27kmaph below.
What would be the acceleration of the clown at 5 s?


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31#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.18: The motion of a circus clown on a unicycle moving in a straievc8l b8ia-n: ght line is sh aclibn88-e:vown 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 p8 5 :akh4fiugnear 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 tabl qx/ r8i8 ;wv43qgak)jn dt0khe top for 10 seconds. For which ti kjqhtw)34ag;vq in0/dkr 8x 8me 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 marbl48blh7 bskg1qe on a table top for 10 seconds. 48 hbql17sgkb For 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 ofsa, x ;tz;du5n a table top for 10 seconds. What is the marbles average accele ztax;;ds,f u5ration 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 from rest for4xk .vpx2or 6w 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 9qh13hr*a0e zs2,k0q c qehogq5hlpf6l7h 0hof $20.0\;m/s$, 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 f l y2h5bkmv6k5n0+pydaulp4 0 ollowing graphs could correctly represent the motion of an object moving with a constant speed5+dla0hbkl y2564up0vpky nm 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 theeix2y c4mcvuv574kdvq/ sj(7 motion of a toy car across the floor for 10 secon de mcv y4(uv2/sj7xi57 4cqkvds. What is the acceleration of the toy car at t = 4 s?


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40#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.25:The accompanying graph describes the motion oc aljbyd.gf ua;poc,,lj7kr5r5; 9 :kf a toy car across the floor for5;;l,akdf .j 9y7aj5 ,cpolcgrr bu :k 10 seconds. 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 grap /a bjxen *hrirb3l*2u.x 08dph describes the motion of a toy car across the floor for 10 seconds. At what times or time intervals must the net force on the toy car be zero arju*p dbr2 8e/ixlb*0h.nx3 ?


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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 5:5obdlir 3h 13qdyhjone of the following choices best represents the acceleration of thei3 5rhoj 5d1 3q:lhbyd 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 followingt*)cjqim( 2.ce ijp ly4-c b)r statements c*e)y pil)2rq 4ij.(mcjctb -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 1 qq*z:5vppqr the x-axis according to the velocity versus time curve shown to z:qpprv* q15q 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 tennis ball is m7u*t w3ybdi a )+onxmsa+6xk1oved so that the angle between the velocity and the acceleration of the ball is kept at a constant 120 degree. Which statement is true about the tennis ball dur x7 1 wk+sn+atoib)a3dy mx*6uing 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 automobilet,,hmyeo9o fyq47 qt2 s are 150 kilometers apart and traveling toward each other.7 o9h,eqy4ytmfo2, t q
is moving at 60 km/h and the other is moving at 40 km/h. In how many hours will they meet?

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47#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  07.04: A particle moves on the x-axis. When the acceleration is positive and g+09d zsups :yincreas ypgsu0 sz9:d+ing

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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 velo(maba8 d5j) rbcity 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, wh :9; gaj)lk0 sbc s8wrt)jj cd2c)his7ich one of the following choices identifies quanti8s b0);kic )j c:dhsgj9l7jcr)asw2tties 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 g q a mh9j l.zr3n-.a;h+:vq,xercl,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-t - jwq cb06+zio1qdp-rime, $y\;vs\;t$, 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 aloc5(l o7km5ufwb4; al/jc)x tqng a one-dimensional track for total time T in two parts. c4a lf/( xo)5um5wctk 7q lb;j
• 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 fb t4zcj-k39x(rh 3p hdor the motion of a car on a straight track is shown in the diagram. The thick line represents the velocity. Assume that the c33t kz 94pbc(xhdjrh-ar 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 msmymrs,7 o7 2- ggf50uyee* knb4w 9vgraph for the motion of a car on a straight track is sbky74 f 2,-my* mgrvem9w0ss57egnuo hown in the diagram. 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 motion of an object given by the plm fj b;o(46 fzi 8zbkmo5,xv(osition vs. time graph shown. For what time(s) (l(b;8o, ifj4bmvzzmoxf 65k 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 objectg o3ohi,alt6h t h*b4: given by the velocity vs. time graph shown. For which time(s) is the accelerat3oi*tlhtagb 4, :h h6oion 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 hsm p;fcglf7j4 mp qj;8vs 88.the acceleration vs. time graph for a fixed time interval of an object’s motion, what quantity has been determined for that obpvj m48j sp8;mf8cgl.s q;h f7ject?

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58#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  11.08: An object moves along a horizontal line with incregw:,a 8ne yaz 8.vp1vsasing 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 par z )gecma0h k8+rb)h3mts:
Part 1: it travels a distance of 800 m at a constant speed of 4.0 m/s.
Part 2: it travels a distance of 1200 m at a constant speed of 20.0 m/s.
What is the average speed of the car for the entire two-part trip?

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.02:A small object is released from rest and reac+v : fy:8ydwophes 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 reaches the ground in a timeemlppfi .m o* bc3my(;o+w gv*.9i h-b 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 dgd5)341gp ju jdyb1igraph of a particle moving along a horizontal axis is shown. What j)4u5djg ydgi1dpb13is 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 al58n )on7mizn wl of the listed situations for which there is a non-zero acceleratio)nnn8zim5 7 won?
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 obj bp10spepxz+ 0fo5o n.6v xf,zect moving along a line is shown. The object starts from rest at time t=0 s. At what time(s) does the object attain a maximum displacement from i+,zfzf5 0pov 6 x.1x b0epnposts 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 veloc l7o0shy( v9nzity along a line vs. time is graphed. Which one of the following cho( o97ynlh0zv sices 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 t5bupnqe:.cp: he right on a horizontal track, each with constant acceleration. At an instant of time, the information about the cars is shownqpnb .:pce u:5:
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 pb4o 9j4(:we- irw jybdosition $x$, 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 x-1 8 d 3krz* xhcj/qgxe,-trfus/-cl the graph, which one of the following choices correctly describes the relationship between the average speed of the truck /eqch tdf,zk urj-xlgx1-r /cx *s83-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 th8qx)9vge ibe +e instants of time, at which the car and truck travel with the sam)qx ibg+9e8ve e speed?

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70#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.30: Two cars P and Q, each start from rest at th .xic x.e4 27torc9rxee origin and will move along the x-axis. The acceleration vs. time graph f .r2 74tex9exxo.riccor 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 o -z,1pmx+c8t.ae 1ju1 t s +v+bfemiisbject moving on a horizontal line is shown. At what time(s) is the object moving with its greatest speex.tpsiz 1usit, faj m e+8+11 cm+-ebvd?


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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 h wx8sl,*2ab4lr thx; the x-axis following the position vs. time graph provided. During what time interval(s) does the ma ,;8bwl4hlxsrth2* a xss have zero acceleration?


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