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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 aroundp *id i2n6i pm5;zf9e:gygh1 c 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 re:dbk zrgu()v:3g7toob *b xg*ference to a particular direction is callu (or7z*obbt)g* vbk:g gd 3x:ed

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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 comp1y ,70 faoe+x8dcogakletes one lap around a circular track at an average speed of 50 m/s and then completes a second laoxodea 7 ck1+,8 0fgyap 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 1rpro 70h q sk)es7w:y6.0 s at the constant velocity. If it continues, how far will it trhow)ksr7s re:6q y7p0avel 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 vj4 d fbppjadagf 9+-b3b/0 uy5ox- -d30-kg plank that is sliding at 5.00 m/s to the right across a frictionless poaf+agx5fy-pdd-j b 4 -/pd0o 9ubj 3vbnd. 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 travels 400 km at 80 km/h and 400 0j,*/zrxm lfco- rv 1mkm at 100 km/h. What is the average speed of the motorist on f xjmm/-rzo,c*r0vl1 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 r i8fzdekk0 rkv(,h+; car traveling along the x-axis. The grred fv+r0 z,;i(k8k khaph shown below is a plot of the car’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 refers to the motion of a toy car t/8ihgjrx,4 ,fav jd 2 wo-b:nfraveling along the x-axis. The graph shown below is a plot of the j/nxa jod2g4v:bw8fi , fh- ,rcar’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 motion of a ty 2/wb bu t(zn * pc5w28iewj/g.y.muyoy car traveling along the x-axis. The graph shown below is a plot of the car’sc( gub .8.yew/jwyiu pbyw/52m*2zt n 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 ab xq2dq8k5+db duck flying due south for the winter. At what point did the duck stop its52ddb+q x 8kbq 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 thw /o17 w(kwtmbh7t6dde diagram below which shows the position and elapsed time of a car starting fromhd(b6o/w1 kdtm 77wtw 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 shows the positf k kk0l.doged*an+ ;9-93r ser xhoc,ion and elapsed time of a car starting from ref dn+ elr.,c*gk 0;3hsk9erd-9ook xast and uniformly accelerating in a straight line. The average acceleration during the entire 3 second interval is closest to


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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.20: What is the shape of the velocity time graph for wn2q vap.ad+ )t2rj,b an object with the position time graph sh a,qd ptb)j2+vr2a.nw own 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) zd 5mz 6wc30f2al:4wxtk vfnf 01vx+xeqns . following information. An ideal elastic rubber balvv+ka5t00q3 fd1:wfz xm enczx wsx46)l. fn 2l 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 rem 3 g,sg+k7mjhfer to the following information. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor and rebounds to its original height. j+g,k7m m3h gs
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 aw/n9175 bug4tbrj1yyro+n.u zgw: utravel with a speed 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 followi8jq8dv ofcpy9os)zt0 po3e,+ vz c4p/ng 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 foll* +ba8rx3unoo6 g lyr e(.(xysowing 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 scenoq j. mutsc(45y7+b hxario: 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 sco -v7)7f 18hbzq xszmqenario: 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 r-daqh* 2dxwj yx qp2c)dio-,8 amp, across a horizontal table top and off the table edge. Which of the following would bes ycad*pxqixj 8-qw2 d)2d-o,h t 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 time for an obkml o0r7j2z0q2x4fpv3l (c-ezf qy c:ject that is moving along a straight line. What is the instantaneo2-l 70 z ym:kqlq vc4eorzj2cf3(f0p xus 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 distance ;u8 6 m*pnlyi d;pm2doand time for an object that is moving al iyud l*p m;8mo2;pn6dong 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 Earth with an initwy; :wubqecgl0gkw* :.r 6(hg ial speed of 12.0 y(bcwu :wl0k ew6gq:;g*hgr. m/s from a position 10.0 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 re1g; ql5ts5p uumg;q 0hr4:g kxpresents a toy car starting from rest and uniformly accelerating across the floor. The time and distance traveled from the start are shown ig5lm u hp :;quts; 0xq1gkg5r4n the diagram.
What was the average speed of the cart between 0.1 seconds and 0.3 seconds?


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26#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.12: The diagram below represents a toy car starting from rr(iglxs +7p hn 3u*4xiest and uniformly accelerating across the floor. The ix+74xnugh lp*(i 3srtime 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 x/9 hdfnx;s47 fqu +6n(gvimr starting from rest and uniformly accelerating across the floor. d+6 u ;gsm4r9n(/7 qfhvix fxnThe 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 /c6ualtfdc t/+jn n 32m7xv7v accelerating ball. The position of the ballvl6 7nt/2a/xnv+m3f cj 7tcdu each 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 position of the balg, l;xpf9k-r fl gp- rf;,lx 9fkeach 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 aked 2 9*iwd;ah unicycle moving in a straight line is shown in the graph bel2k;h *ae ddw9iow.
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 circ/s -wsaur i 9.s9ye0zcea(4lbus clown on a unicycle moving in a straight line is shown in the r( l/ea4biu.ys0s99c -zaews graph below.
After 12 seconds, how far is the clown from her original starting point?


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32#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.04: When an object falls freely in a vacuum near the surface of the 4,otza e* f56/fwkm6(v sjwixearth

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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 describ w:cv qi p6f/p)8aapl;es the motion of a marble on a table top for 10 seconds. For which time interval(s) did the marble have a negative vpqiw:; c6ppva /)8 falelocity?


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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 theg at8c:p1ac( d motion of a marble on a table top for 10 seconds. For which time interval(s(:a8cpa t c1gd) 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 on a table talzm; ;7;kf u08winzs4ud2luop for kdu2alzizu;n7musw; lf4 80; 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 rest for a timqkv.pyw lr6:+jjb6y,7s zj ,ve 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 downwards 37vs sq b16t5t:2b7ukdpk fd with a speed of $20.0\;m/s$, takes $2.00\;s$ to reach the ground below. From what height above the ground was the object thrown? Ignore air resistance.

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38#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  04.03: Which of the following graphs could correctly ul 0ww1ij7 u1 ctm9f-o;qn0vrrepresent the motion of an object mo-viqlf uc91w7tnw m0u1rj ; 0oving 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+r,l qupb pb37,srl8 i graph describes the motion of a toy car across the floor for 10 seconds. What is the acceleration of the toy 8birq sup+,r 3b,7lpl 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 tx fcu 5n;h1o/6 atb zck,)rza2oy car across the floor for 10 seconds. What was the total displacement of the toy car for the entirn; o zxuhztbc fac26,1/5ka)re 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 g 0il-j:0bl6gwuq*-26nxpr c*ipz yfb 2 +swf jraph 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?x*bi60yjf-r- ij q2p* w0 nlwpf+cz ls62gb:u


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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 uni:qb6shw .po 3zlg nyjv33 q2q5formly from 0 km/hr to 60 km/hr in 4.50 s. Which one of the following choices best represents the acceleration of thes2b q36qj:v qz3w.ypg n3loh5 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. Whichkog/b a,xu 7)ww7 ;phb of the following statements regarding its motion ispw,o 7xh gkw;b)b/au 7 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 moveswl4rd* ;mx zqs*un/c 9 along the x-axis according to the velocity versus time curve shown to the right. When does the /c* wn49szd;lx*qu mrcar 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 n7 /n -v/s sdm15jfctwe cqz8.time, a tennis ball is moved 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 tz7ew -csn/5jm8c1./qvs tfndhe 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 15th 64c0uw,2 can,sp0 kv qrp9y0 kilometers apart and traveling toward each other.pcy 6pv c,srtun0 2qh9wk,04a
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 positiv/uh*g cpxf y4qa,/ana989pql e and increasiqaug,y9f pn aq/c9apl4*h /x8ng

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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 velocity 5xb gb2 zo.quq.8j q+iis

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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 twx4m xcy v8*w8xo dimensions, which one of the following choices identifies quantities tha4xxxvm w y*c88t 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 move7pk ak21ko8ad w,; kbzs $3.0\;m$ 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-mxxlu7lfb c;0. hc6je-b7 , )zdia 6mk.me*yytime, $y\;vs\;t$, graph for the motion of an object is shown. What would be a reasonable equation for the acceleration that would account for this motion?


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52#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  09.31: A car moves to the right along a one-dimensional tracto/pe4hd)* zxw5rh- ak for total time T in two paorthp)wxh/5d-z 4e a* rts.
• Part One: The car maintains constant non-zero speed V for the first $\frac{3}{4}$ of the total time.
• Part Two: The car accelerates uniformly to rest during the last $\frac{1}{4}$ of the total time.
What is the ratio of the distance traveled during Part One of the trip to the distance traveled during Part Two of the trip?

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53#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  08.23: The velocity vs. time graph for the motion of a car fs91w3vtm eg-on a straight track is shown in the diagram. The thick line represents the velocity. Assume that fmg t-s9we3 1vthe 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 5+d 03ve xgvxxa straight track is shown in the diagram. The thick line represents the velocity. Assume tvdx5e x+30gvx hat 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 position 9o)ohfgp 9cp7vs. time graph shown. For whg o) o79pf9phcat time(s) is the speed of the object greatest?


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56#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.11: Consider the motion of an object given by the velocity vs. time graphke/h pvcuf0h)-6 h9a-w tp. rkronf)9 shown. For which time(s) is the acceleration of t9.ffh0at vnc )rhkh6/w-)e9 ru-kp p ohe 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 acceycuxs5.( d:0nmtu/ o kleration vs. time graph for a fixed time interval of an object’s motion, what quantity has been deumtysox.(d / 50u nkc:termined 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 horj uw sc9 pyz+7i3t)/jiizontal 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 au-od(r 0it :+ckt tb dng*of4; trip in 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 from rest ldl1z;-+ti0i74 eedfi a j9jmj5 - bahand 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 grot*ku9iu3cbgk z2u41)vg.fglu a z.9 tund 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 plt87 8b*mi2xxg(c1tufp4 n aiarticle moving along a horizontal axis is shown. Wha ua87tintf 2lg84p(* bmxi1xc t 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 following choices correctly 8 q koz)h32a(l / ggb,f(kvinpidentifies all of the listed situations for which there vgz3qlikk,pn/oh(g8) bf(a 2 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 ogvhdj;5mz 1 bmf og9plk6nfx,k2 02.n bject moving along a line is shown. The object starts from rest at time t=0 s. At what time(s) does nf,.x5dzlf ;bkg0kgvh nmp19o6 j2m 2the object 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 startse*eh wrv,z (51adlc7k at the origin and 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 vw e5c(re7zdh1*a l,kfrom 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 righx oxoq;yj p/ip: hbh*08:jagptv g1-3pzc*(t t on a horizontal track, each with constant acceleration. At an instant ob3*8tpah* yiph/;cqjv0z-p:x:t 1(gx o pog jf 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 position eo n7(x z2p lnj7p8pw1$x$, 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 the0n2)u+zb tlskuf)cp/ following choices correctly describes the relationship between the a /cp)s) +k2tu b0fuznlverage speed of the truck to that of the car?


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69#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.42: Which one of the following choices best dev3lsoc7g;a7 o/qntpk( -0z k jscribes the instants of time, at which the car and truck travel withc (k7ql7 nvpk 3;oo/0-zgatjs the same speed?

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70#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.30: Two cars P and Q, each start from rest at the orig3q it2iw6ovz4/fkfpx a708 zo in and will move along the x-axis. The acceleration vs. time graph for each 73fazxii4t8kz o 0fo2p6qvw /car is shown. Which one of the following choices correctly identifies the relationship for both the speeds $v$ and the positions $x$ of the cars at time T?


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71#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  16.02: The position vs. time graph of an object moving on a horizontal w 8vp(. obo96aro,1p.3k,nchli : lt ;lfrrrl line is shown. At what time(s) is the object moving whpnl3ic l. ra,ftw;.vo r l6p81r,:9(orblkoith its greatest speed?


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72#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.08: A mass moves along the x-axis following/jhxjy23y /pg the position vs. time graph provided. During what time interval(s) does thepx yj2 y/hj/g3 mass have zero acceleration?


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