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习题练习:Physics Bowl by Topic 2: Kinematics - part I General Motion

 作者: admin   总分: 72分  得分: _____________

答题人: 游客未登录  开始时间: 24年03月31日 09:50  切换到: 整卷模式

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1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.10: A particle travels at a constant speed around a circular path of radiu:t, pz/ndvgfvd +x1 i.s $R$, 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 refe zr+u:p xdtn n4+/u01,f b2ocvwkz+bmrence to a particular directvn1ordczb2u +fu+ b+pzn :40w kmxt/, ion 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 c1qr5c +)qmw i (haoz/bircular track at an average speed of 50 m/ ()o1mza qc+qi/5 wbhrs 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 1.0 s at tisb t2v4k(cfivy6 b2- md.y, jhe constant velocity. If it continues, hf(vby .4ci2sdv-j 2k6tybmi ,ow far will it travel in 3.0 s?

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5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  05.34: A 40-kg boy is stationary on a 30-kg plank that is sliding at 5.00 -ycg,ike+* crm/s to the right across a frictionless pond. The boy then turns and starts walking on the plank at a rategk-+ e*i crcy, 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 bx qx ,: s cdwjj-zag.6cs4fs5+m5e;f 400 km at 80 km/h and 400 km at 100 km/h. What is the average speedasfcdx6,w-b5gsxe:4 zc+js f 5j.q;m 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 travelin kzl0b ;5sqx*ng along the x-axis. The graph shown below is a plot of the car’sz*lbx k;5qs n0 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 refers to the motion of a toy car traveling along i 8v)/y6g0 bx w:a(sdqi*u7hzd m4qe qthe x-axis. The graph shown below is a p*vu: s yi8i(d)aq4q0 z6hmb g7e wdq/xlot of the car’s velocity in the x direction, $v_x$ versus time $t$.What was the acceleration at 33 s?


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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  97.22: This question refers to the mosoa/ 3whirq 5 y+g-a*tu*dd,r tion of a toy car traveling along the x-axis. t/*, *i+5oydgawq rhr -a d3suThe graph shown below is a plot of 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 graph of the velocity vs. time of a ddo4k5ju osn)2-q q ht4uck flying due south for the winter. At oujqok-q54 sth2 dn4)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 re-lpwn x 4+uc4t7 mypiix 1 ojfb/*zu2,fer to the diagram below which shows the position and elapsed time of a car starting from rest and uniformly accelera/po mwyz1f7* ic,nx44l xb-p u+uij t2ting 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 shows theyw9-(r whodbyga2gd4.) 9 aqd position and elapsed time of a car starting from rest and uniformly accelerating in a st)bdw9a-49hdo ad( qyrg. gyw 2raight 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 shapet -w q8c77ujxirq+o ,v of the velocity time graph for an object with the position time graphc +rw7qoiuq 7-tx,8v j 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 taxl tpi.8m/ 8hi8zv;q he following information. An ideal elastic;zim8a8lt /h8ix pvq. rubber ball 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 the following information4 smu8al8d *ao8b;; rhdm qaw6. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor and rebounds to its original he8uo;4;*d w arma8bm6h8sadql ight.
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 speed oft qsog; 0lj ;q+-8as51nbnmuv $v$ 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 refe6dq9 tm2* iut rw;;agfrq04dnrs 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 sce5aq)lsscvj ext* +m.owh2(,r nario: 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 refe-qqscx+eu vj /c4;u:crs 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 tenpl.i+ay6sbl5 8,rj he 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 horizontal table top an.xct)vqkobua 6y5d r4:t* t:sim/w: nd off the table edge. Which of the following would best represent a grqk5dyv mait.4 : rcts*u6 x:)/bnwo :taph 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 distan qa:szlxw43rmy-x -agq8 4(vh ce and time for an object that is moving along a straight line. What is the instantaneous speed of the objeca 3:-aq4zw rsv q-4g8m h(xlyxt 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 relationsz ooinn01boxc1:48 ,a(ra dy vhip between distance and time for an obj,ro8vo0 n b( aox1 c14yia:dznect that 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 Earth7tstpvc:bi4;; e m6ew 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 reachesmbp4 7 tv6e ;:ew;icst 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 from rest and u ,s dlxath3oz -q/)rzuue+p +6niformly accelerating across the floor. The time and dist )/tuh u,6aproxeq zlz+s3+-d ance 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)nd n6it uzw: fxpk-8r1l;a8w a toy car starting from rest and uniformly accelerati ;rn iw8)6wuak nf 1:pdt8lz-xng across 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 rest and unrheswg,6c+wy +;y 8dtvf 4ls6iformly accelerating across the floor. The time and distance traveled from8w t4 cr6fe+ +6wyglsd,;yshv the start are shown in the diagram.
What was the instantaneous velocity of the cart at 96 centimeters from the start?


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28#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  04.08: The diagram shows a uniformly accelerating ball. The positionw.ikqubo* taa/ , bn,or-(7nq of the ball each second is inauqw*n, r q.bt ,k /nab-o7(iodicated.
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 positi*:m jyk6i96stqti 2puy ;kh r6on of the ballqikuy6*:6kts 2mh;rjpti 6 9y each second is indicated.
Which of the following is closest to the acceleration of the ball?


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30#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.17: The motion of a circus clown on a unvyap.82tct d3;d2f0dat 2 yqx icycle moving in a straight line is shown in the grap 3 y2a8cfdv2t;ta 0d 2qydpt.xh 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 circuj+un r(yu ctz90cj2 .ms clown on a unicycle moving in a straight line is shown in the grr0n.y(u cumzc+j j 9t2aph 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 thxd)0msq+fe * be 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 ee8 (wme :aqa)a table top for 10 seconds. For which time interval(s) a8e:wma qe)e(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 marb w8j5ha55). h:b7eit zgopikple on a table top for 10 seconds. Fori)7z.ihgt5b 8k :opw5 ahp j5e 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 grap( lacbxhi 5c4)h describes the motion of a marble on a table top for 10 seconds. What isccla5(i bh4) x 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 frz75cbb-u uoaii- c4p-om 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 1-v*sl f s .u5bn/n tcpd8+toda 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 / 8/u tvwuf upo2t9+z)0dj8 ::bvjtqrzgka3i correctly represent the motion of an object moving w:p8 a9gtjqv/bvkr+u3f u0tdiw:/zjut2z o 8 )ith 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 describes the motion of a toyda:d c)w/g ;rb car across the floor for 10 secad ;:bcw)r g/donds. 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 of a toy car across teg3m kw1w .o(jhe floor for 10 seconds. What was the total displacement of the t (jewog1. k3mwoy 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 tho:/r c-isv) ztg-5 ezv wk4(o93losfve floor for 10 seconds. At what times or time intervals must the net fo -o5ck t-3ooielss4:v gfzw/9 r )vzv(rce 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 4.5- ker2g 2v)5m0l tqobl0 s. Which one of the following choices best represe2-bml vk r2 te)g0lo5qnts 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 oy/ud1 *w yacq2gg/nn8f the following statements regyn* a8/q2nygw g u/c1darding 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 th5 a:mfrvjw7cx ruc7*cb no-6ema +8 ;be velocity versus time curn+a; rfjaue : v- 5cwobcmb76xcm* 87rve shown 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 tennis ball ishbamm c016:v g moved so that the angle between the velocity and the acceleration of the hmmbv0a1g6:c 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 ki)g,kbwp-nvh ,lometers apart and traveling toward each other.w,,-)hbv g kpn
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 incefxcmh)m7j e n)m5 e2*reasing7f) e2 mme5jmehn)* xc

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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 velocior3 gv e(h97(6w hlwaity 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 ort 71yh/.kwdl pv4ddzq3d(o7 ne of the following choices identifies quantities that must have the same direc zy ot.3p1v lqdw7h(/r4kdd7dtion?

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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:t-aaqs k3j4 ,: saykt4y9vaos $3.0\;m$ 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-td ;w9rwe*ysz nk06w xk09bnx9ime, $y\;vs\;t$, 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 alony):y08j/u-iu o lybaw;pxp .wg a one-dimensional track for total time T in two parts.wpiyl ypb-;wxa.oy ) /ju 8:u0
• 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 folb7c,v 8ph(xrvto ae +7k kpo89xhc32 bqr8m 1r the motion of a car on a straight track is shown in the diagram. The thick line represents the ver9teh l 2orv 18, mxb7(cb8qohkp7+p8 kcv 3axlocity. Assume that the car starts at origin $x=0$. At which time is the car the greatest distance from the origin?


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54#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  08.24: The velocity vs. time graph for the motion of a zdkkyse. k0 09mv,g)d car on a straight track is skk9 yzkm .s0ved0g) ,dhown 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 h )n(9v7yt t1f9lp llzthe position vs. time graph shown. For what time(s) is the spe( y7ttnl 9pllh9z1)vfed 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 givenz+v 3,y u0kxyw bq rpd4wj(q4;.0hycj by the velocity vs. time graph shown. For which time(s) is the accelerat4rp(vy jzh0qdj yq+x3u,wk. y;04c b wion 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 areujy9el h11h7xa under the acceleration vs. time graph for a fixed ti7uyxh9le 11jh me interval 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 spee+nvh s ag0b61kd.
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 tn+1;gxejdzr. xef/3 wwo 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 from rest and reaches the grtm,:m)xsv y;. qy 0saaound 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 rlk6i8 yiv b2:u p +vl8pcxke5)eleased from rest 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 gi* 4;zul8o2hgogs zf ,/(k wev+z3jrf raph of a particle moving along a horizontal axis is shown. W zrj/gzzko 3*ei2u 8w+f,4(gvs l;fohhat is the total distance traveled by the particle from t=0 to t=10s ?


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63#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.18: Which one of the followd6- u nh8,yzylirz,*r ing choices correctly identifies all of the listed situations for which tz-*yn8y,idrhr uz ,l6 here 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 objec*p rn5mwm+w pz7 hgv;9t moving along a line is shown. The object starts from rest at time t=0 s. At what time(s) does the obwnpzv w9m ;7mh+rg* p5ject attain a maximum displacement from its starting position?


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65#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.17: An object starts at the origin and its velocity along a line h2xtz/tdl), 8 hyvl3yvs. time is graphed. Which one of the following choices best gives the propert hdzy38lvtl/h2x)y, 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 horizonta*/3enq4hu bzc l track, each with constant acceleration. At an instant of time, the information aboe n*4u3hqb/ czut 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 ha-0 (qdm2shlllv wphf3, f/0jts a 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 graph, which one of the g9 : e;za( l7vkxr 7k0fhky4pbfollowing choices correctly describes the relationship between the average speed of th9kg 7 eypx hbfv rz0k(:74k;ale 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 tviip)hwc+w 7t7se yr vh* *c.2he instants of time, at which the car and truck travel with the same pr vvi7s.2* hhw)et*7c i cy+wspeed?

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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 the origin and c1)3wjo :j m0u a snaza1re42iwill move along the x-axis. The acceleration vs. time graph for0ja:j 1 a)3zr u4iasc2enw1o m 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 g 50g c7*43ts i6jp 5j)igb gop/xarbgzraph of an object moving on a horizontal line is shown. At what time(s) is the object moving with itsgg 4b56 izg7ac txpr/ 5osjb*j3p0g)i 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-axiswo gc(9 ldbbj9(l;9uh4*yjum following the position vs. time graph provided. During what time interval(s) do 9ludc(yju4m( * w hbj;b9log9es the mass have zero acceleration?


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