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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 tratsri;.au r-bmi*-t;4v en mo/ vels at 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 withm8v jp3pch 4y*out reference to a particular direction i jmh v3p4*y8cps called

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  12.29: A vehicle completes one lap around a circular track as7 hqv-br 9lw+t an average speed of 50 m/s and then completes a+sw-vq b9r7 lh second lap at an average speed of $V$. The average speed of the vehicle for the completion of both laps was 80 m/s. What was the average speed $V$ of the second lap?

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  95.03: A toy car moves 0.80 m in 1.0 s at the constant m5x 8q1x9rfe7tvlx /j velocity. If it continues, how far will it travel in 3.0 sxxtm/891 7 vqf5rxelj?

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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 s2+(bvhb-afu(yg;zm wqdi 8 i6tationary on a 30-kg plank that is sliding at 5.00 m/s to the right across a frictionless pond. The boy then turns and starts walking onmuz6vgwfdby qihib ;2-+(8 a( 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 isgbtp8t tlp:36 the average speed of the motorist on this t ttgl:p6p3 b8trip?

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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 3;fw (8mxmy )vg ef*aecar traveling along the x-axis. The graph shown below isfgx)m a *(vm3efey8 ;w 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,)gvaing + d.x toy car traveling along the x-axis. The graph shown below is a plot of thevi g, .g+nd)xa 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 motion of a toy car traveling along 44u )g a5yvtty6tr61gk :ceilthe x-axis. The graph showng )4t 5y ruel vi1tg4yc6kt:a6 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. time8q byg.z i-m-y of a duck flying due south for the winter. At what point did the duck stop its forward motm yb.zgyqi--8 ion?





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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.17: This question refer to the diagram below which shows the pof.9 fkhj.g+id sition and elapsed time of h9.j +ffgi .kda car starting from rest and uniformly accelerating in a straight line. What was the average velocity of the car during the third second?


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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.18: This question refer to the diagram below which shows the position and eleqyhc8w7e 0l8apsed time of a car starting from rest and uniformly accelerating in a straight line. The average accelec8e8hyw qle0 7ration 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 grky:-llb a 9kf(aph for an object with the position time graph shown in the dib fllk(k9y a-:agram 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 follow c0zzct)3qy vy,nf4z9 ing information. An ideal elastic rubber ball)cv3zn,9 zc0z yqy4t f 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 questsshtcd 692rbu5kw 9vw a5 yk:5ion refer to the following information. An ideal elastic rubber ball is dropped from a h:a2u69kw c5 dh tvyw5kb9rs5seight of about 2 meters, hits the floor and rebounds to its original height.
Which of the following would best represent acceleration versus time for the bouncing ball?


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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  00.39: If a boat can travel with5 lmw8xtaf,ap 4z 6,gd 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 referlh4t vz, ogz(9s 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 scentfrt5/-gb 2jh ario: 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 refersrfayo778 xlzynn 7 nh): 4k2an to the following scenario: At $t_0$, two cars moving along a highway are side-by-side as they pass a third car stopped on the side of the road. At this moment the driver of the first car steps on the brakes while the driver of the stopped car begins to accelerate. The diagram below show the positions of each car for the next 5 seconds.
Which of the three cars had the greatest average speed during these 5 seconds?


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20#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.04: The question refers to the c uchoom1wkc/f*n )dwvm) 730 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 top8anc5j95 pxqylrfhz: k:t 3 b1 and off the table edge. Which of the following would best r :z 5kypa 95xhl3cjtn18fqb: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 dist61.f03vpbr jl)d72 ntt lgimm2ynd f9 ance and time for an object that is motdvp g 6yf)frbm7lmid29 nl.012tnj 3ving along a straight 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 relationship between distanceq067z+ z vx,86iedk yu0mjoak and time for an object that is moving along a dxv, 0u+q 7oa0myk6i jek86zzstraight 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 fa ;(4lmlqmb,t 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 fm,q(lb aml4; 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 aoerd ffu,d- pej2 cb4b;ru5rk 6+*2z qnd uniformly accelerating across the floor. The time and distance traveled from the start are showrq5+6r- 2rd ecpfdu2*4z ebjo k ub,f;n 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 toy car startinlh5;;ccfsvg3 9y l0dh g from rest and uniformly accelerating across the floor. The time and distance travele 9chhl csg3fdv;y5;0l d 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 uni+-fpb2 hzaty*formly accelerating across the floor. The time and distance traveled from the start are shownpy-h b2+a*zt f 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 bacgvwase*1 /)g/+j , fmt hk2ysll. The position of the ball each second is indicgwfah y+j/vk /cem )1s2 gs*,tated.
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 acc5zi p 2rf()wk-9eaewfelerating ball. The position of the ball each second is indicatw-f9aez 2 iw (f)pk5ered.
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 moving in / c*k tiy,wyi,a straight line is shown in th*,t i/iw,yyck e 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 on a unicycle moving in a straight lew5f77 ejfvgbe ) w(q+ine is sho gewf77v)we+ ef qj5(bwn 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 falls freely in a vacuum near the suxmi c0wp9u p i2s t1k*kr96zu7rface 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 graph describes the motion of a marble on a tabl+ ;vd 02t1wefg+qincph;hibu 1)(ys ne top for 10 seconds.qs0vy(;tenp g1+u nh2 +i1iwdfh;bc) For which 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 describe 0 +ghbyi-lb re8,,5mvj+kx hls the motion of a marble on a table top for 10 seconds. For which time interval(s) did the marble have yervb+hm+ -i hjl5g0 kl,x8,b 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 top pmff+ tk0;bf j0oux.9dl4pq4 for 10 seconds. What is the marbles average acceleratiuxf 4kqbo; + j0l9p4 pmff.td0on 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 -(hbtyz.c 71dzhkqn8 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 downwar(b/ecm*nyt spxx5,h) d 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 follow+f w3kyx76gbo.f1wwdrbt, 9ting graphs could correctly represent the motion of an object moving with a constant speed in a stkwfwt +gwf9b.x7ybt3 1ro d6,raight 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 descj5n69.etj zd wribes the motion of a toy car across the floor for 10 seconds. What dtnz.ej 9jw5 6is 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 thkrxd6v /, *vcke floor for 10 seconds. Whvrk d6/vkc x*,at 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 describes t wbewu.fhg+us-m 8nk8- 2fauw3-+ps j x*6o pmhe motion of a toy car across the floor for 10 seconds. At what times or time intervals must the net force on the tonsu8 a-fsub8kwoewh3ju pmm -wf .6*p+ g+-2xy 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/huwm)cbt59d *pr to 60 km/hr in 4.50 s. Which one of the following choices best represents the acceleration of thw *b5udm)ct9 pe 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 velocityp+v8l:ox 88dswmcx : wa(joz3 versus time curve shown. Which of the following statements regarding its motion is NOT C8mxz (w x:al:88 3jvow +odscpORRECT?


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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 al 8cnk ,(capv*vong the x-axis according to the velocity versus time curve shown to tan8v,ccv(k* p he 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, q/iqpf-yni-v. wl poav2;27ja 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 inter-iq; ownp 2.i-fvqlv/yj 7a2p val 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 a/e 8 sv6wa+xxjpart and traveling toward each other.+8/a6xewx svj
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 ijdj,j:n*k:oesi 3 ,mrnci*drkj3osm,e: , : njjreasing

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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 y i7em 6tu inkons)u3gu/p:*+velocity is

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49#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  16.18: For any motion in two dimensions, which one oxpr cxb/05 md5gfip,d+2-f i rf the following choices identifies quantities that must have th+, pfdgp5fdm0r ix rc2-ix/b5 e 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 mov. nq 9vkvxb)-jes $3.0\;m$ 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-timr/ b * nobsn9*vbj j5mcmm2-.pe, $y\;vs\;t$, 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 ax oek/r0mii0 .long a one-dimensional track for total time T in rkix eo./0im0two 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 x(l7),v 9k*v2jp vlrj )g/tl-gm wh urgraph for the motion of a car on a straight track is shown in the diagram. The thjjvg/ th, llwuk* m7vv 9)l)2rgr -p(xick line represents 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 v jhp lz0odxcw-c1-6 y(s. time graph for the motion of a car on a straight track is shown in the diagram. The thick line represents-yd-w z(lpo1 cj6cx h0 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 objecthc.bm v5gvb-ngbk p2 o,/.+n ab2q a*w given by the position vs. time graph shown. For what tvqn.o.k gw/b-5 gb v2*m hc+aan,2b bpime(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.3ph9 8)du 55cepmt wtu time graph shown. For which time(s5)mpu5ch t8udw9pe3 t ) 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 area under the acceleration vs. tim l)8v;u3ykwq5utm m(qe graph for a fixed time intervak)3 umy vu( qw58tl;qml 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 increasijd x*i( xe6dsk47ncjml 02nt -ng 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 inp a1ti+h3l4+cuu .zv 0w ark7u 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 3a nxy9fhw6f 3time of $2.50\;s$. Neglect air resistance. With what speed does the object reach the ground?

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61#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.03:A small object is released from rest and reaches the ground in a time ofl1afds-z j6x(i 5 id-y $2.50\;s$. 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 fg+k)d(cb 4iograph of a particle moving along a horizontal axis is shown. What is the total distance trafb(oi4k +)g dcveled 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 tezfxt1 81 n++is,:sz1 9lk*yuh ucmsrhe following choices correctly identifies all of the listed situations for which there is a non-zero acceleraz y +inu+hkz1*c,18 1ue frt9ssx:lmstion?
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.dq9(g- zccf f7 time graph for an object moving along a line is shown. The object starts from rest a-qzd(fc7 cf 9gt 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 line vs. time ikgg77 0byv3hz,lf nq;s graphed. W70h z ;,37 qvyglbnfkghich one of the following choices best gives the proper interval(s) of time for which the object is moving away from the origin?


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66#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.09: Two cars are moving to the right on a horizontal track, eachwyr.f9 6wlkmriq0h*g)o8h f 5 with constant acc8)w .rq5f*yf6km9r woghl i0h eleration. At an instant 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 p/( om *)g gpcy, n .4ximravat5by,y1xosition $x$, 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 the4 61gcuahfz8 q following choices correctly describes the relationship between the average speed of the truck to that of the ca f8zg1q6ua4hc r?


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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 71xc5y dro-a linstants of time, at which the ca 1ay-75or dxclr and truck travel with 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 f(w 3zfx:5n0;x:p cy,mmjp xibrom rest at the origin and will move along the x-axis. Theji3 0cmxpf xn b; p::yz(xwm5, acceleration vs. time graph for 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 graph of an object moving on a horizonhxg-xys 8tc8kr) d/ s3tal line is shown. At what time(s) is the object /y hkg88rcs t3xd )-sxmoving 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-a hi6o ,-xknyb4))v- mteuu1p-. ep, f9sleoetxis following the position vs. time graph provided. During wha enifblhoy ,tpup4e-eox.1)9ks-u et-) m6 ,vt time interval(s) does the mass have zero acceleration?


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