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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 coieh9925wx2atpsdg j 2 nstant speed around a circular path of radius $R$, if the particle makes one complete trip around the entire circle, what is the magnitude of the displacement for this trip?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.01: The change of distance per unit time without reference to ac4( -ujc4kqkcmu ;j2m particular directiuc2 uj c4mkq 4(;mk-jcon 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 circular track at an aveb )e--g tsy3xprage speed of 5--sb3yt) xegp 0 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:jd yg/a-g)b, b7gapu it continues, how g:d)agg7j /b b uy,-pafar 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 isjm+,k 8szg ,dp stationary 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 on the plank at a rate of 4.00 m/s to the left, relative to thep, gkjd8mz+,s 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 kmcv) - m6gvlq*sfmm/s; /h. What is the average speed of thsqc slvf m*-m/vg;m)6 e 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 w8j n )(z8ekx)qhlsftg0+so:toy car traveling along the x-axik)seg+ 0)f 8ns:q(8 t hzoxjwls. The graph shown below is 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 toy ca 48-rvg b 4xbyo;1d)dkxul8lu r traveling along the x-axis. The graph shown below is a plot y4 uobd1x)8uld;x 4v8kb -l grof the 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 ek58f3hjr/xd motion of a toy car traveling along the x-axis. The graph shown below is a plot of the car’s velocity in the x r/ e j835dkfxhdirection, $v_x$ 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 velocitx- ()m b)zv);cilwrlcy vs. time of a duck flying due south for the wix i)-;bcw l)lzc(v)r mnter. At what point did the duck stop its forward motion?





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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.17: This question refe92vm1hyrrlkx 63 f/bmr to the diagram below which shows the position and elapsed tif1hv2 y/lm3rr 6k 9mbxme of a car starting from rest and uniformly accelerating in a straight line. What was the average velocity of the car during the third second?


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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.18: This question refer to the diagram below which sho,a .psz) ggubvlbzeo3hz(4jt4* .w+cws the position and elapsed time of a car starting from rest and uniformly a(hszt4v.bg4c j,pug)e lbz+ *owz 3 .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 graph for an object with the pb3m)ho44drxdn ip0+dv a2n(u osition time graph dbhi3rd +n0 p)xmu4(4adon2vshown 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 que gpkc/l40 n6fistion refer to the following information. An ideal elastic rubber l f6c0/ igkp4nball 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 question refer to the following informat* rxly sdny;z9); )y6wvto, boion. An ideal elastic rubber ball is dropped from a height of about 2 meters, ;) rxvzy; ) tlodoyy* nb9w6s,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 with a speed of z)mk3gp 9r+xt-/f- byifnr0r*nay x-$v$ 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 pl (r3ct 8 b/qr3hae*dthe 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 scgwa+ u, )nui+lenario: 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 fok/ +,eqxw5tf pvq8me,llowing 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 following);v tf xcy-eb p1/-scv 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 top and o9e aed59qxednue9w07il* c.h ff the table edge. Which of the following would best represe5xd790deq9* .n w elieuehc9ant 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 p:*48p-g- b a rrqdc3mchra:qfzf l16between distance and time for an object that is moving along ap3d :cc af p frq8q-zal*4 1:hg6rbm-r 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 dis3qqte/txu1/h n;ye)j o l( c:otance and time for an objecteeu ot1nt)j:/qy ;/q(o hlc x3 that is moving along a straight line. Between what times did the object have a non-zero acceleration?


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24#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.07: A small object is thrown straight downwv:uw-l j9on7yard 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 uwn jy: -ov79lthe 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 ac 1ua7mkj. g.f8.chj mnd uniformly ac. u 8g7 hmcajm..1jkcfcelerating across the floor. The 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 toy car starting from restj, b3di 3vi9 mhb6b4twvpnt;85i6 dzp and uniformly accelerating across the f6 45jbbvht3vdnztm8 9,3b;ii6dp piw loor. 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 toy car start,.osvzh:n0 jpvh (x6r np)g7ring from rest and uniformly a vpzo 6xr:h,(s). rpj7nhgnv0ccelerating across the 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 balt q llix36.yy:l. The position of the ball each second is i :y3txq6ll.y 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 accelerating ball. The positft(tg 0z9 l,kqoe9fy7cg4k1jion of the ball eatfk(e9g zjc790 o,qytk1fg4 lch 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 crezick7ur/ h/t+ j .x)lown on a unicycle moving in a straight line is showrt)xh.+ //e7crjzi kun 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 in a straight line is 5 otc eb*r/y)lshown in the graph bell *tr)ycbo 5e/ow.
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 neapcouo:fj(hk( 1f.1 s gr the surface of the earth

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33#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.11: The accompanying graph describes the bcmhn+2619 gjokq,m,+bz a ii motion of a marble on a table top for 10 seconds. For which time interval(s) dkz nb1ob +qijhai,mc, 2+6m9gid 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 ahrgxat 2ud x6bg ,(;1ac,v-07q xujqi table top for 10 seconds. For which time interval(s) did the marble have a positive accele iuar6 xt g2bv,q(x q,1x0cd7j;guh -aration?


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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 ofy.kg kng9 .y 4*ea4onf a marble on a table top for 10 seconds. What is the marbles average acceleration between t = ge.*k9ko4n.anfy4 gy 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 for a time oe0ffnr1ne xx;mo o/ 245/i nmof $2.00\;s$ 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, thro)2jva2 a 7:a yjutqo skuvt937j5l ez2wn straight downward 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 fnc6 +cqi ed32lznk 8)uh (jc +tvsz,3aollowing graphs could correctly represent the motion of an object moving wvnc ln,dueqcz+k i a+36hj)t8zs23 c(ith 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 graph describes the motion of a toy car across the vqjt( wij2u 37floor for 10 s7i3qjjvt u2(weconds. 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 tgp3 qjgnri1+auew+ ) ( pj4gl+he floor for 10 seconds. What was the total displacement 4jpg irq3)wu(1+glp+ +j ngeaof 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 t j2a)bg x+1kwzoy car across the floor for 10 seconds. At what times or awk2)z+bj x1g time intervals 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 s1k +a5glcvs* km/hr to 60 km/hr in 4.50 s. Which one of the following choices best represents the accele*5 vs +cas1kglration 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 thex)x3m*unt/ *svjbm p8 m787q wwjvsc 5 velocity versus time curve shown. Which of the following statements regarding its motion is NOT CORRECT? nmm3vxb 7*j*8)uwx5vtss 7p/ m8wqcj


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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 versus ti7j b5udrt13 7 c;qhkwjme curve shown to the right. When does the car ht jw7h bur;k 7cj3q5d1ave 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 intervalseu xn6 f.g +vy.tqpnm33c *)m of time, 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 veqpm)..n6g f3 mty*nc+3su x 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 kilo) mgg.bt.tvs8meters apart and traveling toward each other.gt..sb8 vt g)m
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 a233ih (j h*w(sa 9bsutqz.)qywr zbv9 nd increasib ujw3b( 93 r(vh).z sayzqwi2sqt *9hng

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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 ve:sf9r t.f;bgm locity 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 ,c )w 2 pg-z)ihps8vhjzbeup7 k8iv01in two dimensions, which one of the following choices identifies quantities that 7vph ) pbk01su,w gv)jh p-c2 ze8izi8must 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 moves u*6ahd4zizw7 , t6o/;oamjod $3.0\;m$ 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-t v5euj,gq1sues;u /73( jums nime, $y\;vs\;t$, 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 track for total ti z:h z2.ndmdlcmeah f 39y8;y3me T in tez;m9d8 h fa yy2chdmn:z3l3.wo parts.
• Part One: The car maintains constant non-zero speed V for the first $\frac{3}{4}$ of the total time.
• Part Two: The car accelerates uniformly to rest during the last $\frac{1}{4}$ of the total time.
What is the ratio of the distance traveled during Part One of the trip to the distance traveled during Part Two of the trip?

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53#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  08.23: The velocity vs. time graph for the motion of a ca/ sy7me f(n7pq x.yn vaa*e7i5r on a straight track is shown in the diagram. The thick line represents the vel*xv ef a(.p7n57s7ymnea/q iyocity. 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 fo(e2;k5yu ap amr the motion of a car on a straight track is shown in the diagram. The thick line represents the velocity. Assume that tump2 aya5k(e;he 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. time graph k ; m+j0.g;pzbb77lmde k- xrkshow0lbxb r7jp-+m k.7kk z;m; gedn. 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 vecxl0d6m2roi :0lcda mu(r44v locity vs. time graph shown. For which time(s) is the acceleration of the object equal (d x6ril0c2d 4a0mmu4cv :rol 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 accegpnxt,z 1hn6*85c x kyleration vs. time graph for a fixed time interval of an object’s motion, what quantity nzk8 x*,p1yhg6tcxn5 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 mov5m zy6 dbzy t74td)e0xes along a horizontal line with increasing speed.
choices could represent the signs of the velocity and of the acceleration for the object to achieve this motion?

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59#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  11.14: A car makes a trip in two z; hlb ,i0+cy- xtjs/4cd;qqjparts:
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 rensfh2 2n ,g c4-o(plkyleased from rest and reaches the ground 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 fs 6 *,t avu.g0otjiy*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. tikqs9(6m 7 jqpz(wdo w5t y* nip/46rgime graph of a particle moving along a horizontal axis is shown. What is t 4*qs6y((579nwzd/ qp wp gimt oikrj6he total distance 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 following choices correctly identifies all of tu8qc( e3: g1odt3xbpthe listed situations for which there isqo13u(: b 38pdettxcg 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 a bgt5 oy ff 452aflv**vh(u kh.line is shown. The object starts from rest at time t=0 s. At what time(s) does the object attain a maximum dilgk y(f*hftov.fa52v hb4 5* usplacement 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 origiyuq-vty syd p 5b/6 svm+8cd)3n and its velocity along a line vs. time is graphed. Which one of the following choices best gives the p-6b)+sdd yqmyy8 cs3vvtu p/5roper 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, eaccgf:0dtbzc2ul3 6 (ra h with constant acceleration. At bu06g(flr 3c taz2:cd 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 posito1hbb4-uzf u g0b8b9oion $x$, 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 r6p40ekkkfe/ wor a0:g.vx3i graph, which one of the following choices correctly describes the relationship between the ave . kkoap0 4rw0/ xrif6g:e3vekrage 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 describehf5h+sedmire:lk6u82 -s 9+ zfzur9ls the instants of time, at whhmurh9dif s-9 ur+2szf +l685ez lk: eich the car 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 from rest at the origin and will m10f2h + *sk xxt hwnvwg1/;qtjove along the x-axis. The acceleration vs. time graph for each car is shown. Which one of the following choicev/*h 2gkh 1+ s0jw;wtxt 1xfnqs 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 graphokjy5h3ca8 g oj0lw3* of an object moving on a horizontal line is shown. At what time(s) is the object moving with its greatest speedw3 gycj0oa8*o5hl jk3 ?


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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-ll5sxvy 2w:: - q 6g6vjz6j7cxgmsrb/axis following the position vs. time graph provided. During what time interval(s) v/m:6j bx6wl xjr ssl :y72g-qvc5 6zgdoes the mass have zero acceleration?


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