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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 constp8 4syf0;vcew2t ne;9 t; zuytant speed around 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 reference to a particular di l,bv *z+r 5zzpjbrb-,rectib b pbrzz*5lr,-j ,z+von 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 avera.pu )v;smcc .n8 oajp0ge speed of 50 m/s and then comp;v).0u no ja m.pcpsc8letes 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 constant velocity. If it coqk hq 6l*(1scantinues, how far will it travel i1qlhacq (k*s 6n 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 stationary1;yqw;o8zdsym9 wa jh.n 5y 1z on a 30-kg plank that is sliding at 5.00 m/s to the right across a frictionless pond. The;qm. oyays1; 58dwzzw9y 1nhj 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 travels 40wdo)00 7cy4 ua f9.2zjf hyecd0 km at 80 km/h and 400 km at 100 km/h. What is the ay0fc2e4.czuw79) df yjohad 0verage 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 theh9y r3)lco,zkv4uo ; k motion of a toy car traveling along the x-axis. The graph shown below is a plot of the car’s veloc c;) lovukh r4,yk93zoity 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 refersmw16:ok0xt *i9th kr r to the motion of a toy car traveling along the x-axis. The graph shown below is a plot of the car’srkxk h 0 96tw1rti*mo: 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 refers to the motion8t:zq z:j ,es0u3v*h+vjy wc a of a toy car traveling along the x-axis. The graph shown below is a plot of the car’s ,:v 0yh8q eactu3z*jjz:+ svwvelocity in the x direction, $v_x$ versus time $t$.
How far did the car travel during the first 15 seconds?


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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.15: Given the graph of the velocity vs. time of a duck flying dueae(9d 2+ gdhvf4uzno0 south for the winter. At what dh +zvge0und2 ao9f(4point 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 the diagram below which shows the position and k 4 8heklm;,cvxje ico78 e:/kelapse,8e8c / m lo ekc74i;exvh:jkkd 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 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 sh +* ,bti.njkv0 ,vdm 9f(b( e8dpxhfffows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. The avehf+ftd,e i 9b ,8m n*pdfj0 v((b.fkvxrage 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 velocity time graph for an object with the pb ug v zh:u7s/6nuw4 t7kh zk0nmq4w*2osition time grap n7su4zum gk:uz/wh wt 2*knh04qvb76h 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 ) znuv k:j+ b2:q xrfe7ssuyjx 3s+y)8to the following information. An ideal elastic rubber ball ku2 j8+s )sxv)xyqs7b3 e:f run:+zyjis 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 the folloxdlpkzy6- m+1 wing information. An ideal elastic rubber ball is dropped from a height of aboutyzdxm+16p- l k 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 swb9r)8 vn4(e- r amqyppeed 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 rxqeu+bc+ky 6g3u ;q ;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.
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 sc 7slzn8xz:pt;q5 7 9l wdyi-dfpn.2vfg 1l*jxenario: 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 fzs)ov j)(e)bw,3 qfy 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 refers to the following y/hwftk1s 8; mscenario: 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 downna z9eg6ea6-9,qg,wfvzo gx) a ramp, across a horizontal table top and off the table edge. Which of the follox 9) e6ggao,e, 69fznzwv- agqwing 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 relationship between distance and t4s 7 f3*x xtymps(;:wk/fhl*ojf6z xyime for an object that is moving along a stxj(:p 37xxm *y wzftyh/;6sf l*sof 4kraight 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 reli c 18er/k*cz+uk1j vkationship between distance and time for an object that is moving along a straight line. u 1eik k/*+ rj18zcvckBetween 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 thrq. eqnm f214v3ait+9qgoze( hown straight downward on 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 q zqmv4 .3nhgte+2a( i19fqo ewhen 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 representxi+h u:3n jy:es a toy car starting from rest and uniformly a:n3+:u yexh ijccelerating across the floor. The time and distance traveled from the start are shown in the diagram.
What was the average speed of the cart between 0.1 seconds and 0.3 seconds?


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26#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.12: The diagram below represe1eqh 6t4g 4ze;rbn od/nts a toy car starting from rest and uniformly accelerating across the floornbe r1goq46h4e z/t;d. 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 startxskpy8cps .*)bg 1-m: vcm*vfc s 5b6sing from rest and uniformly accelerating across the floor. The time and distance traveled from the start are shown in the diagram. fvp m:ssvb *1cs*yb.xc)c 58mgkp-6s
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. Thewn8 rzs8 fb7*1pvump, position of the ball each second is indimv ppns7 b8z,r*18 fwucated.
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 acceleratikirkr gj1mmq8c3hir26 )31 ajjm4u -dng ball. The position of the ball each seconm cjar2kq 8ikjdjhmuirg-3 r46 1m13)d 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 clor0a m*dglhc7v5,q2mu xn)-rqwn on a unicycle moving in a straight line is shown in the graph be0m r*m x uhq5 nq,a2)7dvc-rlglow.
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 strat7bl4qmk r+4 5h3 bmzlv1d5r right line is shown in the graph3tl 4dl14zqmh5 rbmv rr5k+b7 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 l64+sjjb j /zdg:g* iwvacuum near 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 gbxlaw,88(l p c, .+vj1cterw xraph describes the motion of a marble on a table top for 10 seconds. For which time interval(s) did th e,x 8w,wp bc(clt.+8xl1 javre 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 on a table to ( m afjt-uzlg;-l4ztlh :3j5em40kcm p for 10 seconds. For which time interval(s) did the marble hklzum-a jt5tjleg;3:fmm h04 (-cl4 zave 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 accompany3aoeu ud bf;m.,+i:f sk5mn,ying graph describes the motion of a marble on a table top fo;fa3 +5 :msikde, mu,fyn.ubo r 10 seconds. 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 uniformly from r4l;u*elxwv r3l2b2u vy0j(k hest 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 w pjr6fy6lo1vz/h a; r;ith 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/ l 1v7g.x7x(l ov,xxmechgqf /9mk,i could correctly represent the motion of an x xmxk 9g.hvi(g f1v/e,olcl/ ,77qmxobject 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 descde6iwhp0 j p) )lw/iwa .z/z9fribes the motion of a toy car across the floor for 10 seconds. What is the acceleration of the toy car at t = 4 s?l/waepp6w z i)z0 d/f. j)h9wi


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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 to,oxg 6m lam ov;+8t8ccy car across the floor for 10 seconds. What was the total displacement of the toy car for the entire 1+om8cogcl mvxa6 ,8 ;t0 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 describv3kf97u4d 3 stu3r3ujc9an l res the motion of a toy car across the floor for 10 seconds. At whatj9nd vluar 37 u3s9rct 3f43uk 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 uniaodm/v/c ey /2formly from 0 km/hr to 60 km/hr in 4.50 s. Which one of the following choi/2 e /cvmyd/oaces 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 z7b ciot7ha7 5yg9 q9c -oxy2uversus time curve shown. Which of the following state9q9c57gy y o 2 ctzob7uax-7ihments 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-axisc:2m/uk/y p8bczq 6jq +5y wws according to the velocity versus time curve shown to the right. When does the car have zero acc2 / qumzq /w ck8s5ypc:+bwy6jeleration?


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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 mov6 nbud83mm 2; wnim;gted so that the angle between the2u 6bg;8 nmtdn; mwi3m 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 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 nr *y5uuy) f re8xbi.u8u .3rsapart and traveling toward each other.*e.yy.ur3 b rnr)85 uiu8xfus
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 itpo n -p-v /m/mml twku-ai1zq/j4y :7s positive and incp/toul:m -q-p4zj7 /1 ya mikw/mnt-v reasing

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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 avemuc)32(kzd* bgugg/ kaje,r 8rage 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 fol4u w5hv*3gqo qlowing choices identifies quantities h5vqgou34qw *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 move.kz8 i5qh z1sgs $3.0\;m$ 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, f:f+ gkaq/td.wkgfa*5 i ; ph/$y\;vs\;t$, 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-dimensiona )i6nyc73dcp9b:vbb nx9 5h sal track for total time T in two pa9:px bian 7vys6nbchd5b3 )9crts.
• 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 motionif/+d 2wba1t;(mst* ch2qysf of a car on a straight track is shown in the diagram. The thick line represents the velocity. Assume tha2w*qbt;is1( mfty/sfda hc+ 2t 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 s)aji aijg( *eij+t6p, traight track is shown in the diagram. The thick line represents the jtiijp+ja()ea*6, g ivelocity. 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 u +b 7*tg.vdct-zed) lan object given by the position vs. time graph shown. For what tlu).b -cdz* +tdg7evtime(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 by the velocity vs kzrmzmxk3,2w9:p1y-udt. m+v ,t zrs. time graph shown. For which time(s) is the accelu.zmktkv m,dzt-yw1z : +r m 2sr9p3x,eration 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 a fi8fx/s .xjubm k2 hw;8mxed time inj2w hb uf;m8/mk8xs.xterval of an object’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 horizontal line with increasing spaa * jo1wf3os9vu )9mqeed.
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 i1c:w:zb yjr3b 2 ay0 f7jo8 dxvxuzlqk2+5 a+zn two 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 frfsh c1zdfd*( 3om 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 and reaches the ground in a time o8c 42b6vj ;jc rgm+vfof $2.50\;s$. 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 horizontal axisb6 qj 4ypz0tzo*k(wn - is shown. What * b6znkwy-0 oq4p (zjtis 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 iden/++u hzyvxfr* w4q(jdtifies all of the listed situations for which there +fzx/(uwhjdqr +y4v*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 mg*kd f50zrga ,oving 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 its a0* dk5z,fggr 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 alongl zl:cf a adf5:huz+jj.042iu a line vs. time is grap .4 jlfu+:z0a: 5hc2ai zdflujhed. Which one of the following 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 p 8rm(z4vv gp1constant acceleration. At an instant of time, the information about the cars is sgm z1pv4rvp(8hown:
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 position w, tu ,e6nd6b3ggu98ceto)zl $x$, as a function of time $t$, given as $x(t) = -15 - 25t + 10t^2$. Which one of the following choices represents the magnitude of the particle’s acceleration? All quantities are expressed in base SI units.

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68#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.41: For the entire time shown in the graph, whiwda. h51 l:oovm4+z+k ocbnm9ch one of the following choices correctly describes the relationship between the average speed of t :nao+9kbv mzooc5m l+h d1.w4he 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 mi6h*1zed95 +kh5o/e3h ymbz;flf qhbest describes the instants of time, at which the car and truck travel with the same ;6h5 1mhqf m hb/5+flei9k3hdz*yezo 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 starf ymu e;t/(ma;f o hpi7mjgie4k.7a76t from rest at the origin and will move along the x-axis. The acceleration vs. time graph for each car is shown. Which oni7eetmkyp74. ojmfh ;a ;m7i6u agf/( e 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. ym48/ymmx.w6ke7 mz zwrx*i rynzp )im80g *. time graph of an object moving on a horizontal line is shown. At what time(s) is the object moving with its greatest z wpn g.rx m yr. mim*zw4iy708ym)8/e6zx*kmspeed?


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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 c ;zkzncw(7+/u tx26cv 9gw wwposition vs. time graph provided. During what time interval(s) does the mass have zero acceleracwtk;92(+zg xu6 ww v7wnc/ zction?


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