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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 crd1j8j8uu.v0jk4c(j;m xo s a constant 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 particulnbjoyq64/m +f+v f *nrar direcb +f4+omn / fjvryn6*qtion 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 complete ez9yym+k +rx5s one lap around a circular track at an average speed of 50 m/s and then completes a second lap at an average s9 5zy+ryk+ xmepeed 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 continar cfyw -/nug6;/5hxwues, how far will it-c/;rnhw5u 6 gyfx/a w 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) t;4dqvgxc8ihev ao2mc +(3c at 5.00 m/s to the right across a frictionless pond. The boy then turns and starts walking on the plank at a rate of 4.00 m/s to the left, relative to the plank. What is the speed of the plankhgamv c 8v4;)q eoxci3dc2(t+ 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 8 ,aphtun:v 6r:f0m: za0 km/h and 400 km at 100 km/h. What is the average speed of the motorist on thtn:p0vh:, :zauf mar6 is 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 tone pzqr:(2r fcf d43huy+ht ,0 the motion of a toy car traveling along the x-axis. The graph shown below is a plot of the car’s velocity in the x directfdthfp2,z:u +3yne40 rr ( chqion, $v_x$ 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 the x-axga+d1c7 yagb)sge ee-oj zht.b9 (//gis. The graph shown below is a plot of the car’s v/1gegb 7. )s 9g t(j ycgezeb-dh+/aaoelocity 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 :a /embx( fm/rrefers to the motion of a toy car traveling along the x-axis. The graf: b/ amex/mr(ph 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 duck fl/1y jva wqt/h(ying due south for the wintayq//hjwtv 1( er. 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 the diagram belowm,: t:j4o ohpcn)8p3rl gt ay0 which shows the position and elapsed tiatjo:ng o:)rcp ypl3mt ,h0 48me 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 diagri0n )msp6l2;w e-tofvam below which shows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. The average accelervep6s2 0;wo m)fntil-ation 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 2tqi*8 t*1vsjhmlh 8kgraph for an object with the position time graph shownjt1mhhk 8tsql8iv *2* 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 qiucb qhlo 8bof)2 r5j*k.55i 41gzab luestion refer to the following information. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor and rebounb.u45oiqz1* oafrljhig 5 b)k25 l bc8ds 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 inform ch xzlvgej:1lr:w*3ywa4;xu*3tx 6o ation. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits twh:t3gl1j6 4 x;vxy o:3lu*ez rxaw*che 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 wia6pz0 ;l 88l+zu x ;0on1j2z3popxu,kgyxlwk th 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 following scenario: At oy -es8b (8kzu$t_0$, 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 scenbyv7 31-3 - m3wgaqgh pqw-mgfario: 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 scecfoi j);eihi q) ;m0/fnario: 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 followin 3g.u8ldskxt0*+x:xvlsm4zh g 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 horizon+l 8ndpb nc+,t 6wfi wr)gjp;(t;fwa*tal table top and off the table gn6ld;n;wjw+(at fb* t f)ipp,r8 c w+edge. Which of the following 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 represencx5.fdzkw xxzjukn7(:9 0m3vts the relationship between distance and time for an object that is moving along a straight line. What is the instantaneous speed of the object at t = 5.0 seco(zkxjx:xc03zfwd mk nu. 7 9v5nds?


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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 relatio .ozy eroaev* 4;ur*y7nship between distance and time for an object that is moving along vzru7ay4e* ;.rye o o*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 objec+ ;91hq)y a-vuo5nlk) thpflgt is thrown 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 when it reaches the lgu v5n-+o fpl1t)hkh 9);yaqground 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 an jf5eju*dq(g e1basud7r0) 2jv6ep:vd uniformly accelerating across the floor. The time and distance trav a5uvfu1v:dsb)0e72gq (ej p *jr jed6eled 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 belowz(fz2g sz0gyj lj8*2q represents a toy car starting from rest and uniformly accelerating across the floor. The time and distance2y0(gs*8j jzz f zg2ql 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 bel9kcqnsnfj4 a3o+s aak.- n6z5ow represents a toy car starting from rest and uniformly accelerating across the floor. The ti o sa kj3.n+-q z4a6nfnks5a9cme and distance traveled from the start are shown in the diagram.
What was the instantaneous velocity of the cart at 96 centimeters from the start?


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28#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  04.08: The diagram shows a uniformly accelerating ball. The posi2i9xl(bq)cx 3r;aw n2r)ou wf tion of the ball each second is in ub)nqr92lf)(wri c;owx 32xadicated.
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 positiont iys7w6-r2so of the ball each second i r7i tsw6o-ys2s 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 unicycnnv8ll ,37 jh5lvmg7kafn-+ a le moving in a straight line is shown in th7lam8g75kl ,3lvfjnhn -av +ne graph 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 onenwv u2ojcdyho, 5e zz ;g-(.- a unicycle moving in a straight line is showy v-nz.u ;w2(,oegode 5- zhjcn 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 fa oyumn1gd w9o ou30fsmrm6mdh11 t/*r/(ftf8lls freely in a vacuum 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 0+a*u.us de*kp: smrq graph describes the motion of a marble on a table top for 10 seconds. For which time interval(s) did the marble have a negeqpuua.+*:r0d*ms ks ative 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 m1vt9 xso8 af0iotion of a marble on a table top for 10 seconds. For which time interval(s) did the marble havt 0xas8vi1of9 e 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 h:f div00k 2a)gmw: ai:rjhk(motion of a marble on a table top for 10 seconds. What is the marbles average acceleration between t = h:v i(fra 2 kwk :dimjh0a0g:)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 unp s + ltdoo))l4i)f u7 4l6d-rb le9hv.aeirg,iformly from 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 downwavw1yc rsmu* 05rd 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 represent the motion of an o+m30 j-kp4u2 +lh-w hfq k6xfnzrsf. uyo9g)object moving with f)f4ylm+uhs-w k 3 60pjo+ q-o h.nxkru29zgfa 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 bn4 dz6 ch/u6utr.jn* graph describes the motion of a toy car across the floor for 10 seconds. Whdcu 4h/6jn.tzunbr6*at 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 desf7.tu vhll,je .unf 0:cribes the motion of a toy car across the floor for 10 seconds. Whut7.f 0h l:nveuf,.jlat was the total displacement of the toy car for the entire 10 second interval shown?


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41#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.26:The accompanying graph describ xioa7o.e7ggn+z n cqof/5jce-7cs6 7es the motion of a toy car across the floor for 10 seconds. At what times or time intervals must the net force on theq7aof/s7n+5xggoej7ce o 6- z c.n7 ic 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 frotw(u.nebbk4) m 0 km/hr to 60 km/hr in 4.50 s. Which one of the following choices best .tb 4ke nwb()urepresents 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, jv5t1mb lkttj* 7yghe0/c fckuh6)7 shown. Which of the following statements regarding its moyvettgf 67h,u 7j1* )50ktbjk m lcc/htion is NOT CORRECT?


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44#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  07.17: A toy car moves along the x-axis according to the velocity versz e:r tr(/)9p2xiywrbus time curve shown to the right. When br:9/twrxy2izerp( ) 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 o d-,jg++3ikpgxft(swgu40z pf time, a tennis ball is moved so that the angle between the+pj0g k4+g s(if uw-dpgxz,3t 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 apart azo 1)6eb m ,eqz(396dhis dimrnd traveling toward each other.i ms,eedq (316ob d6m)9r zhiz
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 an89unpsux unqn;u-- 5 afv.l( hd increasing uu-af;u8n v-sn(q.95 hxnl pu

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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 velocitkqi35l,. lmy ,eg in0uy 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 following f;mh1 w q*hxt*)jr 6fyl9p/qichoices identifies quantities that must have the smr)*pqjw9xt/;h qh i 6ffy1* lame 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 mov si;5 vcj-1vyo9ifuh 1* fxwg7es $3.0\;m$ 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-tuo35m-pb he:mp 6h 82un*keycime, $y\;vs\;t$, 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-dimensiona8jub2* g*:c1xqncrq h l track for total time T in cqg2huqjb 8* 1cxnr: *two parts.
• 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 ak++ *7l ev omz*8f+npzp 1ag a7rb5wms car on a straight track is shown in the diagram. The thick line represents the veloci+gs* +nmap8zwpa7m+v 5*rk71bo zlfety. 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 jg5b2s-jj y6s the motion of a car on a straight track is shown in the diagram. The thick line r-ssy j5 gbj6j2epresents 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 pos (hdk7 ;5rmtbeition vs. time graph shown. For what time(s) is the mhdtkr(7;b e5speed 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 z:lbu) u;.*bni jujn,an object given by the velocity vs. time graph shown. For which time(s) is the acceleration of the object equ uu;nlu:,j n*.)bijzbal 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 zf:,yoy fn-.3it sws;d2gsb-vs. time graph for a fixed time interval of an object’s motion, what quantity has been determined for thaf o-i.:z, y wd ;sf3nt-gbsy2st 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 horizon uhopdh/j; f.fatt/5,tal line with increasing speed.
choices could represent the signs of the velocity and of the acceleration for the object to achieve this motion?

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59#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  11.14: A car makes a tio fa1 t)clsre-b3)t/rip 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 and reaches the ground in a time of ,yza qjrxm3;ei1 :no-$2.50\;s$. 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 ti xp r :pjz (p62fhr67tty)i8cmme 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 an -a 7f3fh);lsr yrd:d particle moving along a horizontal axis is shown. What is the total sl7r dffdh;3: -a rn)ydistance 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 followvvg;n ;5jr- 9gepaa4 eing choices correctly identifies all of the listed situatig jv-g;rpe9nve;a 5a4ons for which there 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 g b3acno4/ z3viraph for an object moving along a line is shown. The object starts from rest at time t=0 s. At what time(s) does the zb3/avoi34ncobject 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 vs. time is8 .r43snzm jm* ;tkl6zmet8ls graphed. Which one of the following n k*;m38l4tst jerm z8lszm6. 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 3padix*vzghybs5h9u- :l w 60 right on a horizontal track, each with constant acceleration. At an instant of time, the information about the cw3p 6-:v gldxu9 0hi bzas5hy*ars 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 positio:+fq u nv pyn7sm)s6p;n $x$, 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 ink0; l8/o + wygx.hqsvf the graph, which one of the following choices correctly describes the relationship between the average speed of the truck to thasw.ylo80 f k/qh ;xv+gt 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 the instants of time, ylkr-f5,w9ol*o/n-u pi-jqj 9g5dp gyz )u s*at which the car and truck travel with f o)n /r-9 j-pzu -dlg* ,is*uyq jkopw9lgy55the 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 ain.o.j yn0c o+t the origin and will move along the x-axis. The acceleration vs. time graph for each car is shown. Which one of the following choices correctly identifies the relationship for b+i y.cjn.n0 oooth 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(oc ,ox d8p,qgts()hn on a horizontal line is showndq x tp(c,g(,8oohs)n. At what time(s) is the object moving with its greatest speed?


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72#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.08: A mass moves along the x-axis following the position vs. t9,s1 44mf nunzmeqk*; ax *vngtsw13m ime graph provided. During what t em qm9,na*ztw4ufnnk 4m1svg*x ;1s3ime interval(s) does the mass have zero acceleration?


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