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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 7n z,.dwcqv qsy x:8m67867 xqysax xxa 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 refnpe0b f: e r l5ux-fg,32mcud8erence to a particular direction is u 08geml:fb u pr2 d,fc-n53xecalled

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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 at an average yzyt c /(8ni6) sapb0;z (ysgbspeed of 50 m/s a;s8/6czbnyyp0zs t)g ( a(byind 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 constag-smm) 5.yovq vs3au(nt velocity. If it continues, how far wm)sy-a3vmq.sg5 v (ouill 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 slidyh +- g-)hto58bbye zzing at 5.00 m/s to the right across a frictionless pond. The boy then turns and starts walking on t zyyh+goe-bt z)8b-h5he 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 travelsq )mondnb59x 6f i5+ag 400 km at 80 km/h and 400 km at 100 km/h. What is the average speed of the motorist55nq a9+ no6xf )bdmig 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:-qnwg0t,;wkwg) kr2 eiez t , toy car traveling along the x-axis. The graph shown below is a plot of the car’s velocity in twk;kwwezt:-,gi,q)eg2 rn t0 he 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 tre.tcpcma 5/z(7 7zharaveling along the x-axis. The graph shown below is a plot of the car’s velocity in the x dec 7mh r.pz7a/5cz (atirection, $v_x$ 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 thetydp:y1y ne ,1wjl1w ; motion of a toy car traveling along the x-axis. The graph shown below is a plot of the car’s velocity nwjly1: d1tpyw,1e; yin 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 velocitycyy f v.vu1t.f(5mof:4ze9a ozr ,n 0q vs. time of a duck flying due south for the winter. At what point did the duck stop its forward monfq:z4.r 5yvv0tezf f(m9,c o ua.y1o tion?





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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 ref36+t:hz lz-wsudv sf558ssr der to the diagram below which shows the position and elapsed time of a c3sst5hfls8 zuzvd 6 - 5drsw+:ar 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 di.m(+luuokn *wfb-bi, l w4k7bagram below which shows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. The average acceleration during the entire 3 second interval is closest ,mbww.u4(fk boinl ukb 7*l-+to


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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.20: What is the shape of the velocity time graph for an object with the o njzu22jmm.9b. hk7 vposition time graph 7uh2k.jz.2j 9b nvmomshown in the diagram at right?


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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  00.28: The following question refer to the fgz ma7 ++ cu.*lv3j dowq*g.bpollowing information. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor and rebounds to its original habc*+wg op+g um q..3v ld7*jzeight.
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(2rhl1 5 ma2 9vzvzopi following information. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor and rebounds to its orizv v 9h ap1z(r252mloiginal 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 speed bbatkz .5:cyva3br 1)x zgl6q* 5ymx2of $v$ 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 scenario3.rb2z my b+zz l-gyd(c)vi5 rx:-+bhizyp 1c: 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 2ckyb19f6)kr 1zjrpu 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 to the fdge327hi;)x fw u9 v 9qztp6,v ov.pmmollowing 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 t(wdb6qo d.* y ap cvjx6*b8)bhlng+4ihe 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 horiz 7/)9oeigzl bmontal table top and off the table edge. Which of the following would best represent a grapgz)79/b ileo mh 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 betwee popg jwj(1-d,n distance and time for an object that is moving along a straight line. What is the instantj j1pg (p,-odwaneous 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 distancerxydq7:) fle: and time for an object that is moving along a straight line. Between whatqr l:x) dfe:7y 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*7appre zj(q8h+fu2u 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 iaz7rupu+(f e2 8jphq*t 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 belo ru ga 48+x:cuke-s1qkw represents a toy car starting from rest and uniformly accelerating across the floor. The time and distance traveled from t+1e4-qr ukak sxug:8che 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 *oo4vyq g9w7m *djx. da toy car starting from rest and uniformly accelerating across the dojqvd 4g xw97y*.m*ofloor. The time and distance traveled from the start are shown in the diagram.
What was the acceleration of the cart during the first 0.4 seconds?


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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.13: The diagram below represents a d:w *yr( l-.d( 8e9j.c edvdfmfme/yltoy car starting from rest and uniformly accelerating across the floor. The time and distance traveled from the ed(md -e:lf (f/ .wm leydcjyd98.r*vstart 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 sg3 fvg 8w: qktxm8/fh+hows a uniformly accelerating ball. The position of the ball each second i:hk+/wv3 f8gmtgqx8fs indicated.
What is the average speed of the ball between 3 and 4 seconds?


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29#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  04.09: The diagram shows a uniformly acceleratingn :ead8zeb(;f b.qa :h ball. The position of the ball eaczh(fdqa: e.n; be:a b8h second is indicated.
Which of the following is closest to the acceleration of the ball?


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30#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.17: The motion of a circus clown on a unicycle movida of+: laq+ko6h:m+t ng in a straight line is show:om +aklo a6fd+h+t:qn 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 circu7l91m +*sbmdjbum 3 nlwj(fx5s clown on a unicycle moving in a straight line is shown in the graph be3b+mf d mn*1j59ll mb(xuw7sjlow.
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 thew h ;(x/qzbi5hcb/ xy2 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 graph describes the motion of a marble on a tfq.e 4thko6d +jao54eable top for 10 seconds. For which ak+h 4ojdoe5.46eq tf 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 marb;w v niszj7:-3p5h,vu-c zhvu le on a table top fonvuv- zi537 p ,uch-;:whvzjsr 10 seconds. 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 marble on a txyd gerdpw:. )7b 1g4sable top for 10 seconds. What is the marbles average acceleration between t = 3.3 s and t = 3.8 s s7g :bwdr )ygpxd14.e


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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 uni hb3dfc9:i8tt formly 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 downward with a speed of umofe337y94c 9d fo st$20.0\;m/s$, 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 csh 92 9s2i .nzm/rudbgraphs could correctly represent the motion of an object moving with a constant spee9/is. dz2r umbs2n9hcd 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 graph describes the motion of a toy car acryw( w1oflvvs p.)/l*qo9r,mq oss the floor for 1p 1) o9/lqvy ,q*sorw wfvlm.(0 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 describes the motion of a toy car across th89 gjpfgni6c 1e floor for 1j ni6gf1pc8g9 0 seconds. What 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 the motion of a . i 0jdzl(8sh5yu,rtutoy car across the floor for 10 seconds. At what times or time intervals mh(, ji suu. l8y5z0dtrust 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 accelerlyx.n r +pyb+r0-- nvcates uniformly from 0 km/hr to 60 km/hr in 4.50 s. Which one of the following choices best representslyxcnn-0 byr r+-.+vp 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 velocitu rg- q+r;4hhol,bkvsl*zr w4e 1k:3oy versus time curve shown. Which of the following statements regarding its motion ;lk 1be-*o:khv+roulq4 z,hwr3s4 rg 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 vec39ytd/b lirx12ayh 8 rsus time curve shown to the r2irla yyct3/1bx 9dh8ight. 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, a tennis d7g(q9u y;-1efh +hlmqmh sy :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 theh7+9l: sym gdeh1-uy fqq;( mh 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 and traveling t9fvh9 +zzqe+y+kd d5fexevgk )h74t;oward each other.zfye+h 4dxg+ dk7f5qee +)v9v hk z;t9
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 8a evprkhh1.c4 x+hc8x-axis. When the acceleration is positive and incke hh.c1r4+8pca8xv hreasing

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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 avma090 an+l ddperage 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 sjv 7 x;672if 8k vthzx:xru;ddimensions, which one of the following choices identifies quantit 8rvsv7ti dz6x7xfk2:;h; u jxies 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 move;)fth 3f/7ymroa5 xr xs $3.0\;m$ 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-ti-;)spuo-tx 4jo wb7rx)hwzvs1+ e)pj me, $y\;vs\;t$, 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 e):f 2jta,m rk.yakc(4ec-pe one-dimensional track for total time T in two part: mfc kcy2 )t. a-ere(pae,jk4s.
• 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 o/1+q5 ua7 hrqgzk4coef a car on a straight track is shown in the diagram. o1kzu5greac+qq7h4 / 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 straigmc* kc9iat8- q yl,vq 0.f*bccht track is shown in the dialbcq a.9* qv cck,-8*f0mtcyi gram. The thick line represents 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 obj+ 8m 7gzk0ftckect given by the position vs. time graph shof zg+7kc 8m0ktwn. For what time(s) is the speed of the object greatest?


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56#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.11: Consider the motion of an object given by the velocity ue ;yqfa6 6i:lvs. time graph shown. For which time(s) is the acceleration of the object equal i6feal: q 6;yuto 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 areh p5j:ie ht,j1hjh:* w1ngp0,ugq1y aa under the acceleration vs. time graph for a fixed time interval ofjn:,i:0*wph1ugghhj 51qp aty hj , 1e 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 increasing sp)jb yk+12 qw7dog1o sheed.
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 pli7gu6bb 1u 1tarts:
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 f 2z;q:x oaug4of $2.50\;s$. 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 +q xmcslduf9hp e0l g:e1rcq8( f028 kis released from rest and reaches the ground 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 grn*d:;;j9.06 tdb ftaa2mwie b b pxy8japh of a particle moving along a horizontal axis is shown. What is the total distn e.jbw0tt8p * ddyf bbma:;26 xaij9;ance 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 followinyxeg7:gt9- nmg choices correctly identifies all of the listed situations for which n9gtym :e-7gx 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 an object moving along qy/ k*r4-abap a line is shown. The object starts from rest at time t=0 s. At what time(s) does the object attain a maximum displacement from its startingka b4/aprqy* - 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 alof,/ 4gd02qb. in vfn32sqh a bg3spi8cng a line vs. time is graphed. Which one of the following choices best gives the proper interval(s) of time for which the object is moving 03nq2 3iisd2 fbb/ .capq, s8g4f hngvaway 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 movii2b:nrf zppe ,d zd;//ng to the right on a horizontal track, each with constant acceleration. At an instant o,f:b/n dzz/prei d ;2pf time, the information about the cars is shown:
Car #1: position = 125.0 m; velocity = 13.0 m/s; constant acceleration = $1.5\;m/s^2$
Car #2: position = 80.0 m; velocity = 9.30 m/s; constant acceleration = $5.5\;m/s^2$
During the next 1.0 second of motion, which one of the following choices best represents what happens to the distance between the cars?

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67#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.14: A particle has a position ua :4f-c 6 quhrfqfc.(e-d; xa$x$, 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 show;xkmyo-qdqj:eya*fi(9a b ku*) z k4 +;bfr0jn in the graph, which one of the following choices correctly describes the relationship between the avbqy; q4 ofx)dbzme(rjkfk0 9*a-+ :i uy*a;jk erage 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 cho;v (46qxpe hrmices best describes the instants of time, at which the car and truc rvx6qpe m4h;(k 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 from rest at the origin and will a03bf txzd;ud5 xw l; bed/b;+ss;+m wmove along the x-axis. The accelb5;fx et3sw z+xadw bdsd;/b0;+m; uleration 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 gra2bkcp0 68mnlrph of an object moving on a horizontal line is shown. At what time(s) is the object moving with its great2b6 lrpknc8 0mest 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 followinl x7.x:zje k+k9hx ,zjg the position vs. time graph provided. During what time interval(s) does the massj,+ xlkxhkz: z7j.xe9 have zero acceleration?


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