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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 c2nkem2; f4oz7gqrvoa)h o- /xonstant 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 qz8bloh vt640xi(sw*reference to a particular direction is calle8w sl*z0 tohqbi (v6x4d

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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 comxzjdgg po-ah 8uc6dc0-33tr6 pletes one lap around a circular track at an average speed of -pdaugt -jgcoh3xd0c6 zr3 8650 m/s and then completes a second lap at an average speed of $V$. The average speed of the vehicle for the completion of both laps was 80 m/s. What was the average speed $V$ of the second lap?

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  95.03: A toy car moves 0.80 m in 1.0 s at the constant velocity. If it cn*1ybcwy .)md ontinues, hom)wb1.yc* dnyw far will it travel in 3.0 s?

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5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  05.34: A 40-kg boy is stationary on a 30-kg plank that is slidin5xb(wi j a:j4k0dnv7g g 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 plank relative to thnbg4w (kj5x 70ia:jvde 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 isu*j3j3j2qp2j: ni 8bt. quknt the average speed of the motorist on this tri2nqu*.njj3pt tk 3qb8j :j 2uip?

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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 zz qlridj/ /nuv9oiqr71f hc6-60:qn motion of a toy car traveling along the x-axis. The graph shown below is a plot of the car’s velocity in 0j6n/ l 6vqdr:io/u7nzfz9rh i-qq1c 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 th. ,m4 po/b2ek+fzbub de motion of a toy car traveling along the x-axis. The graph shown below is a plot of the car’s b24 fozu.emk+b/ bp ,dvelocity 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 travel4 o ,fa*mvjq4cing along the x-axis. The graph shown below is a plot of the 4*a4 cqmov ,fjcar’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 + fjp6 jzgfsda.o)-9alkv--:xjiw 7 :on8wgkduck flying due south for the winter. At what point did the duck stop its kkzjwijg f:og9x.l8-dn- -+)vj of6 7w ps:aa 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 below which shows the position and e6tgvmj:fv,- p3 3fjq alapsed time of a car starting from-fm,a 6 tqjp3 vfg3:jv 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 th;u * r2))ah czh0a0 ntcf7dqro the diagram below which shows the position and elapsed time hfrrc ) 7)c 0t0hahuqznd;*2aof a car starting from rest 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 grb;pl gw:+ ;zwz*sogq s0g:k9x+w*tzvaph for an object with the position time graph shown in the diagram at r9*gq; wxvptz+g+:*blsk0zo z ;w g:w sight?


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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  00.28: The followings3z k(j)ox7x9rsg lknovr 3pq 8,a6+ z question refer 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 o 3xq9ozrlkov j3x,8askr(+gzpn )76 sriginal 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 informationerp4.knsfmr +uwx (8,. An ideal elastic rubber ball is dropped from a height of about 2 meters,8(p.u x,f srkrm+ e4wn 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 t/s*v./ 7nfjqs zg6 *y -z95wkvo:jn;g s rpcbhravel 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 refer,9y5cui p(+vofmw5h x s 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 ref 5y d tp6upc)g(ma*4nners 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.
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 t.ulf1 u6s8(,dgoxvo ,) i lulho 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 follj31m7gnj k:;xyswrzq1c7z f 9owing 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, acr fpkx1+y74epx oss a horizontal table top and off the table edge. Which of the following would best represent a graph of the magnitude of xe+xpf4p 7ky1the 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 af3f :zxz80p n7x7oyly nd time for an object that is movxxl0 77fnoyf3y: z8zp ing 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 re e 1lf xd1,,;amx1ns r82llllvlationship between distance and time for an object that is moving along a straight line. Between what times did the object have a non-zerox s,m lll18le 1vafrndx2;,l1 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 initi gl51d-unoj( k2jm 0yih,u;fz tx;a x(al speed of 12.0 m/s from a position 10.-5lzyt, jafj;nm 2x0(ux(dko ;1 g ihu0 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 m j zukyf(h:1c s,zb6nz1gm)b(pl/v 9rest and uniformly accelerating across the floor. The time and distance traveled from the start are shown in the diag: (,u6hb9pblyz11f(z)z v /c mmsg nkjram.
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 am* g)c .nhpv1ejicm;; toy car starting from rest and uniformly accelerating across the floor. The time and distance . )1ipghm*;n ce;mjcvtraveled 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 restzk4gfnj8b. lk u9 r0j4vkf/:d and uniformly accelerating across theuv /9blj4fgjkkn08r:f 4kz.d floor. The 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 accelerating ballww2riyf:r : fc6rj89u. The position of the ball each s ywr9u jci2r86::fwrfecond 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 sho h6/8zvn4scxhws a uniformly accelerating ball. The position of the ball each secondns/zhh c4v86x 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 mov,vgd cmhy29 9*i sot/ming in a straight line is sh2 h99 ciydm/ogvs*t ,mown in the 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 inx(ftl; yl:l9dc z 7ma9xso2;a a straight line is shotsx(9aa7zc2yf; xm d;ol l9l:wn 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 surface of th0 -g p8q*wmsnm-oy4 nfe 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 i hb+5ui :pg-k2hor,ltable top for 10 seconds. For which time interval(s) did the marble have h l 5+uphr,bi-2kg:ioa 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 z) y fn+1rl8jp5d9/ f(sn;v+yfe czohof a marble on a table top for 10 seconds. For which time interval(s) did the marble s p(f+ on1 f ynvzy +je9rfd5c8)hl;/zhave 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 ch um3r ):72xoucw:- 1jbejkb for 10 seconds. What is the marblerw3 huc-)juec b :1mjo b7xk2:s 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 for7(b5i p ,p r,h45onsakt0fsvv 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 witb:rf5 1ugot+mld y ,)eh 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 gvwmvnwh26g,d )7scv;mp j)i - raphs could correctly represent the motion of an object movivn2s pwm,7 cjvg)iv)6wm;h-dng 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 gra:k*bfb *v nb)nph describes the motion of a toy car across the floor for 10 seconds. What is the acceleration of the toyb *nfvn* :)kbb 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 the uib1oq,ps.pgla+a ni5u 5.f8ji9),:a dywak floor for 10 seconds. What was the total displacement of the toy car for the entire 10 second in p8 f19qo5p sj.,a.ul,dk aai)u+iayn5ibw g:terval 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 thegip/8cn( ntp96ju; xc motion of a toy car across the floor for 10 seconds. At what times or time intervals must the net 9 juxtp(p8ci n6cg /;nforce on the toy car be zero?


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42#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  16.03: A car accelerates uniformly from 0 km/hr to 60 km/hr in 4.50 s. Which /8j q 8evck*rione of the following *krevqc/ 88ijchoices 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:ut np36za s.lhx/6 da time curve shown. Which of the following statements raz dlhu/t p:6a36n .sxegarding its motion is NOT CORRECT?


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44#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  07.17: A toy car moves along the x-axis according t+ :ma,e ,jn t szpc+s,(dx*mzto the velocity versus time curve shown to the right. When does the car have zero acceleration?,z cm,e:*zms(ajt x n+ stp+d,


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45#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  06.22: During an interval of time, a tennis ball is wfytrdq shl ()w/2zu0rp+n68 moved so that the angle between the velocity and the acceleration of the b wr0 fl+s 8)2qndzry/hpwt 6u(all 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 apar) xumj1hp qyx, m/satsz9 m812t and traveling toward each other.a/ x8,hp1 qmxz 9y1ts2mmsj )u
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 *k j qa+n tyy6aki(/8hacceleration is positive and increas j6kkny a8h*(qyi+at /ing

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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 i) 0bq)vkwoo1) 8pbacd k8h:ums

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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,gx: j 5 t5k07q3jigbkcs0 rkz; which one of the following choices identifies quantitiek37r;gkc5 5k x0ijbzstgjq:0s 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 movex ppj( 9awbt*+8i8q ojog3f/j s $3.0\;m$ 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-time, z -dux*m:q2fi $y\;vs\;t$, 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-d0c (z0d vwip+c5k)yp uimensional track for total time T in two pac(5dc)pkipv0 +w u 0yzrts.
• 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 grapd;vlr-;;5mzxibm 1 b . rgioken5de 11h for the motion of a car on a straight track is shown in the diagram.re;m5evli;brb g11.dn k- x5zdi o; 1m The thick 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 vs. time graph for the motion of a car on a 5o luu8+ll7 kdstraight track is shown in the diagram. The thick line represents the velocity. Assume that the car stlluk l 78+d5uoarts 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 an5j b job :t9xk.:sa-qoij;wq0 object given by the position vs. time graph shown. For what time(s) is the sp joib -t59s:jqq; jxbkwa0.o:eed 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 gp/ 2-*wo; - tovtaj(nouk u4trraph shown. For which time(s) is the acceler j*4tnttov2/ o ;-ruk-aupow(ation 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 t6tewu0:k7 4 ygzjz/4gwo2qr: y s)hlghe area under the acceleration vs. time graph for a fixed time interval of an object’s motion, what quugwqzw 42:zsko40tyj hge r:7/l6)yg antity 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 increas-0(m.9t)gsxju di qhsing 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 jii4yck(u (hk* j2nw )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 and reaches the grou (o lo6e(h)tkfnd 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 ground in acy/azdov:: t-7wnem 8d8j q w; 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 moving along a horizontal axiyv bgbr47(vn6lr4m 5gs is shown. What is the total distance tra46b7 bgv5ln 4(yrrmgvveled 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 identifies evry*f c8fl+v k w5wun+w3f0y.1 tqc: all of the listed situations for whicv wwuvk+fr3 :l5e 1f0.qtc y +wf8yc*nh 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 graph for +w f:d1hfdjaa,qm .,ean object moving along a line is shown. The object starts from rest at time t=0 s. At whqa:f .ea+dd,1mw,fj hat 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 wu3ake5o .j:da line vs. time is graphed. Which one of the following choices best gives the proper interval(s) of time for which.d5uwkaj eo3 : 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, each with c17fm rui4)cgf onstant acceleration. c gfum )f4i71rAt 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 l risk7gxt5o/1 0tv w1position $x$, 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 thl1sffz8twv3f 2wmgcq85*j+a e following choices correctly describes the relationship between the average speed 3s2g15az88vtm*+ fffw jwcqlof 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 describes the instants of t: 2kignxac z*3ime, at which the car and truck travel wn :c z*xigk2a3ith 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 and2 +vg lw6r,avj Q, each start from rest at the origin and will move along the x-axis. The acceleration vs. tiwr,v6+ g2l vjame 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 movingj2.mq ;e qm3jrjszh/w4 ld/ch) +*scz on a horizontal line is shown. At what time(s) is the object moving with its greatest sj d3 qrzzc;+cs.4*mqhelwm) jj//sh2peed?


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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(j jlal o3-zc+xis following the position vs. time graph provided. During what time interval(s) does the mass have zero acceleration 3-lljojcz a(+?


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