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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 pathm(8b/ jz ebr)3gj frm8 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 wv09r;2q4 t3ju n8cw-gve haxmithout reference to a particular directi r2c; e- mvthu4xwavgjn908q3on 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 circularc 19aktin j,d3ovi9n+3p)u mh track at an average speed of 50 m/s and then completes a second lap at an average s99onpintkh ia3m, 3v)cju+1dpeed 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 contiq3yr7jsfhf tv a s0a( 7j6ge00nues, how far will it tra0jy s afhfe3as0 7t(j07q rvg6vel 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 stationar(rh) hvw mw:/-/ow ( dapmpvnr0v6 o.oy on a 30-kg plank that is sliding at 5.00 m/s to the right across a frictionle6w:(ow0hw/vom(rvm.vo)r -/n ap d ph ss 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 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 km at 100 km/h. What -wxgx4,vrk6dx r/zslr8zj/tp u5 t( 5 is the average s-z64r/5puwkxt8z g x/srtj vdr5l,x(peed of the motorist on this trip?

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7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  97.20: This question refers to the motion of a toy car traveling along the wf1o ,/cy) 8ck*dt v17zynaa xx-axis. The graph shown below is a plot of the 1 oakcwz7nya 1f*),v ty/dx8ccar’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 travesh.5 ,4jhyt43elk pt7wbyrh1 ling along the x-axis. The graph shown below is a plot of the car’s velocity in the x directioneb y1ytwj7 3h4l 4k ,h5t.shpr, $v_x$ versus time $t$.What was the acceleration at 33 s?


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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  97.22: This question refers to the motion of a toy car traveling along m24*z4mq adlt8hp +z dthe x-axismd4+z82 ha*d4l mpqt z. The 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 duck flying due st-qf t +8u1etvouth for the winter. At what poiq et 1-uv+tf8tnt 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 rli8 nb c7kw*j(ee+7p diagram below which shows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. What was the average velocity of the car during thek iwb7(ecr+np*l7j8 e 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 di5g748p3eboxj4 xrc lo agram below which shows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. The average acceleratixe73opbrc4g5 x8 4ljo on 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 b/m 4cgf yd*f-4am*ya the velocity time graph for an object with the position time graph shown in the diag*m a4/cdfb* -fayy 4mgram 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 following information. An ide-b tkwhsw- 6p/al elastic rubber ball is dropped from a height of about 2 meters, hits the floor and rebounds to its original hew ph--/ks6bw tight.
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 qps5dj0tg*,;k ik pdq: uestion refer to the following information. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor and reboupiptd;q*djk kg 50s ,:nds 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 spe6b cr jd1ds5.u ;uhwnu0 ut:x6)x*rn hed 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 (i3mc yv.o*b 58h hwbvt*5okxs2h;u vscenario: 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)qhxod;pwly4 52q5 qr scenario: At $t_0$, two cars moving along a highway are side-by-side as they pass a third car stopped on the side of the road. At this moment the driver of the first car steps on the brakes while the driver of the stopped car begins to accelerate. The diagram below show the positions of each car for the next 5 seconds.
About what position after $t_0$ would car #1 and car #2 have been side by side?


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19#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.03: The question refers to the following scenario: ge.jsl +ttf8ubq;- ; oAt $t_0$, 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 follow32x+glq7t 4dq xewxc72s q6ccm i;em 2ing 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, azd9.5u mlo.sy e 0lx,youj/)zcross a horizontal table top and off the table edge. Which of the followingl j9e )o./x ldzsyzo,. um05uy 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 betwe zxj:o-)qy5mb c+wji,g +hh nf)1p-kaen distance and time for an object that is moving along a straiypw-)o+x bm-fhn) 5k gzcaq ,:hi+j1j ght 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 relation( l 7oxoblu jzry4+q o9+:f:eqship between distance and time for an object that is moving along a straight line. Blo4xrq+j:e:7 b9+ qz loo(fuyetween 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 ij2n 0imoy( ;rrnitial speed of 12.0 m/s from a positi nr0i2yrmo j(;on 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 represents a toy car starting from rest and unifoypp yc+,j.v qt*(p(f qjl5bc)bu -dt6ke )1 ujrmly accelerating across the floor. Thetu5c(be,vpb +pp1f qucldy )-qj *6 )t(j ykj. time and distance traveled from the start are shown in the diagram.
What was the average speed of the cart between 0.1 seconds and 0.3 seconds?


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26#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.12: The diagram below represents a toyu,;o+*jjj z tq car starting from rest and uniformly accelerating across the floor. The time and distance travelt,+;q*z ujjj oed 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 *zuiq fjhl dv.*w r34-from rest and uniformly accelerating across the floor. The time a3ihrw- l* *v f4dju.zqnd 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 show;a/e:yxyc o/. +k :poc erzqc48ijj0k s a uniformly accelerating ball. The position of the ballex0y4 co:r 8 qikjj/zca+/:cy;ek.o p 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 )( kg6hw/evq ni0nhn.a uniformly accelerating ball. The position of the ball each secoeghn(0w)ivqn 6./k h nnd 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 unicycle mo:4/w2do ogowcfd7 n* pving in a straight line is shown in the graph below. d*ow/ n4pofo 7g:dw2c
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+gbzc qy/fn5+ a straight line is shown in qnz5+ gby/+c fthe 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 s-e1-abe4 qckb5p4s 1jdy qde;urface 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 accompanyi,bycsapjaq+i 7hdu l:g 10)t)ng graph describes the motion of a marble on a table top for 10 seconds. For whicu+ l0q),s )i g7:pjbt1aadcyhh time interval(s) did the marble have a negative velocity?


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34#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.12: The accompanying graph describes the motion of a marble on a t /v5g*baf j 6:/;:smw y1bcj(cwlzmwkable top for 10 seconmww/lkb:bcyv w;6:g*1jm ( fazs j/5cds. For which time interval(s) did the marble have a positive acceleration?


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35#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.13: The accompanying graph describes the motion of a marb gi z(i 5f4ng 2m70(epjoe5zuole on a table top for 10 seconds. What is the marbles average acceleration between t = 3.3 s and t = 3.8 se0 7gz5 2ozgfp ujo(e4in i(5m


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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 rebh -0ow(+7gcl/c kxex st 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 wiymeg9v cnuhi*bw q1 s3ias6l-z9nrq/9 32e 1 ath 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;oqy5dzf3h z/ an object movo/ q3zyd;zh5 fing 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 accompanyinex;/kx.6xw.h6ws pv6 3v wzmhg graph describes the motion of a toy car across the floor forwwvkh6e3;ws x6z v6 x/.mhp .x 10 seconds. 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 descrz7 yj;g/gt-8ekwov o. ibes the motion of a toy car across the floor for 10 seconds. What was the total displacement of the tgz7-veog y;w8 otk./joy 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*dew 5u 9t,i;e*n lvfcndo7 d. describes the motion of a toy car across the floor for 10 seconds. At what times or time inter*in v*n9of7, w5e el;d.udtdcvals 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 uniformly from 0 km/hr to 60 km/hr int.o/pv(fvmi(k x i 3k/ 4.50 s. Which one of the following choip3 x.ki kv/of/t i(m(vces 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 versus time curve shown. Which of the following or hgaz os+l)5hx(y3 0statements regarding its) 0s5golahhzrox+ 3y( 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 movedkwkl3dn qbe /8 w42h-s along the x-axis according to the velocity versus time curve shown to the righ 2wkd3-h4ne8 wkqd bl/t. 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 tim0o;qa d 6 mhxnyv9a80de, 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 the tennis ball during this interval oam9 86oy0n hq;x va0ddf 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 .g.(y*t3jfl* ,ekw,y eqt szp and traveling toward each other.kqpwz t,e.s y 3.,fe*tyg*j (l
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- g)yqq)tcdqt iab9pd -z h)-5sk z::n-axis. When the acceleration is positive and increasqtd:dzt5qpag )ib--q -9 )s yz:ch)n king

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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 i5.2xy cp zq3*r sm)njvelocity 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 choickljs3jy 2pv ev4f7;+q es identifies quantiti;vvle p2+fj4 3k7ysjqes 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 movpng fdg y,1m3g98cmb 9q5ut v-es $3.0\;m$ 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-m ;9) f.yjpb7z or7ktftime, $y\;vs\;t$, 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 ;uw y( fe26w5xe v(kxntrack for total time T in two parts. 2 x6;( 5xewf(u nkweyv
• 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. tim;qbslu zu(: s/e graph for the motion of a car on a straight track is shown in the diagram. The thick line resq:; l(su /zubpresents the velocity. 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 fgy;v 6kpgp9e ;or the motion of a car on a straight track is shown in the diagram. The thick line represents the velocity. Asspv;k y;p96 gegume 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 position vs. f l5va 75ilvkm+kk ,5otime graph shown. For what time(olkmf,lv k+755 5vi kas) 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 the2*iemm5)ucu d6pi+xrt tel 35 velocity vs. time graph shown. For d i5mxlecue5rp)6iu3 +2t*t mwhich time(s) is the acceleration 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 art wi*b7wje9ql(l h2k25 x)a,vy/i um aea under the acceleration vs. time graph for a fixed time interval of an object’s motion, what qu 2v aw,y(m7euijt)2b *5ih lal/q9kx wantity 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 witcsy qokb 2wdu288:k9uh 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 trip in two pv5p406r nbx721loj1ongr gtgm a lb:.arts:
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 grwwo.xkzn)46l4dtkr run c7. 8rvx+k7ound 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 grouw1z;5w fvte0clugv y1 -hog18 nd 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 particle 27n+t v(uab6 zczs9 wemoving along a horizontal axis is shown. What is the total distance traveled by the particle+ 2t79ez(zbsa6unwc v 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 correctlpifbwyp(b6;cqlv37f4 j t 6i* y identifies all of the listed situations for which there is abf4 (7il*jp6q;f3 b t6vci pyw 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 moving alonzm5*s pfrs- x4g a line is shown. The f-xr4 5zm*ssp object starts from rest at time t=0 s. At what time(s) does the 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 starts at the origin and its velocity along a 900o;dy nkfq)5hcbi 9d( xhn0z 7tb 0irga*pjline 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 from the origin?*h;a ocbq5 (jzbx)i dnr0yh0g 00tfi n9d7pk9


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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 wit tcix-x13 u:iu0xtv u0h constant acceleration. At an instant tx0u0iiu xc3-v:1tux of 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 posb)7eh 6i i) ay):s5yxvxg5wygition $x$, 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 ono d2eav4h,:hpiwr /7afvh 7;i j5iy r.e of the following choices cor,p:iiv4rh v /2d; 7wo7h.5yaeh jarifrectly describes the relationship between the average 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 describzmap)nd+5z pwr,tf :4es the instants of time, at which the car and truck travel with the same s)z zf+pd:wn5r tmp4a, peed?

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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 will mohoj)3ilj )w o5 kfvdj/(7h pu6ve along the x-axis. The acceleration vs. time graph for each car is shown. Which one of the following choices correctly identhf o6w)( k7ulpjiv o/djj53)hifies 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. tih3 vq2dr95gen pb8iak2vmc.j6. ay. gme graph of an object moving on a horizontal line is shown. At what time(s) is the object moving with its grn98 a2.ic.bdy. vvpg 2jr aegmhk5q63eatest 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 follo*4c,k6lkdk0jlgmzjq6 )s;y lwing the position vs. time graph provided. During what time int 06kysmk;4 l6qk, cldgz j)lj*erval(s) does the mass have zero acceleration?


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