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习题练习:Physics Bowl by Topic 2: Kinematics - part I General Motion

 作者: admin   总分: 72分  得分: _____________

答题人: 游客未登录  开始时间: 24年03月31日 09:50  切换到: 整卷模式

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1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.10: A particle travels at a constant speed aroj3,wfa(vx d:l/r g .yx)t l:vj5mm u.tund 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 witht/dnbq wu6po)13x/ni out reference to a particular direction ii t xwoqu6/ b1np)dn3/s 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 axt r3qi qx,,;na)6i jvround a circular track at an average speed of 50 m/s and then completes a second lap at an aver6nq;iq), axx,r3vt jiage 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 3clr++ 9ubewoe4 wjr4i8v*le in 1.0 s at the constant velocity. If it continues, h l8e+ vrle4i3br9wcwe4juo+ *ow 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 sliding atu6ufv n7:h8ll9j qv d/7e2 eut 5.00 m/s to the right across a frictionless pond. The boy 6nu2:/ ld7hvltq8f7uue ejv9then turns and starts walking on the plank at a rate of 4.00 m/s to the left, relative to the plank. What is the speed of the plank relative to the pond now?

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  97.18: A motorist travels 400 km at 80 km/h and 400 km at 100 km/h. What o gn70g cge6j;is the avera 07;6gongeg cjge speed of the motorist on this trip?

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7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  97.20: This question refers to the mot1+9 6tl4z sw;dsovga- tdt7xaion of a toy car traveling along the x-axis. The graph shown below is a plot of the car’s veloc47tt16a l+; txgad9 dwzo-vssity in the x direction, $v_x$ versus time $t$.
During what time interval was the car moving towards its initial position at constant velocity?


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8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  97.21: This question refers to the motion of a toy car tls 3;**/mztme m (tktsraveling along the x-axis. The graph shown below is a plot of the car’s /tmk *tt z s(elm3;s*mvelocity 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 alongejtk2;vv gezv-7s9kl bv i)4, the x-axis. The ;kebet vvi-s)v4 jk7l2gvz9 ,graph shown below is a plot of the car’s velocity in the x direction, $v_x$ versus time $t$.
How far did the car travel during the first 15 seconds?


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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.15: Given the graph of the velocity vs. time of a duck 3 -vxg i yqgr/i2uw++a suq( grotc1(8flying due south for the winter.+tgs8ru-iu/a2 (o +qyiq13cw r( x gvg 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 refer to the diagram below whicboq,;0lje- a6a m1kbtq nb4.bh shows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. What was the average velocity of the car during the thirqkm-lt46 0 oaan1 q.b jbeb;,bd 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 b5xsoi px -9k7 /u. lkr*akb:bkelow which shows the position and elapsed time of a car starting from restk .7 kxkbb*au rx:l -po9i5ks/ 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 graph for an object with the po-h :te* +v,broj y.hpqwhjl8x l+0o n(sition time grapj: +y.o*rb pjehl ,ql -v0nhxw(+ht8o h shown 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 following iete 9)s5r 5(yyhm*sfcnformation. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor and rebounds to its( ref te*sy s5m59hyc) 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 *pkwf n-fkp8:information. An ideal elastic rubn: -kfp w8kpf*ber ball is dropped from a height 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 traveluof-hqzs4 , g(3gul/8ty4 uy x 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 refers to the fo f ld;3.4uiaozllowing 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 ch6ucj7g cjvza (266)zx*ivcrt2:ga 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 to th kg6ft-- tr: ;jip2w3r b).uf1jusr nye 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 follownc2 p a+*upmsohlxtr3 5f6z/1 ing 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 an9 d/jq5o6*uvwhiw3noa)q i)pd off the table edge. Which of the following would best represent a graph of the magnitude of the baqpiww vih3) 9q6d)/n ou5jao *ll'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 be463 k9k w5y7auvg byl1:dzapitween distance and time for an object that is moving along a straight line. What is the instantaneous speed of a l7k4:1u5iav y6pdzgykwb9 3 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 relatiomd57y9w3 ms 2tkvwvh:nship between distance and time for an object that is movi3v59mdmvw ts: w2h yk7ng 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 downward on Earth with an initial h:e+om pf2tch1h96pv speed of 12.0 m/s from a position 10.0 m above the ground. Ignoring air resist1hv p+to hec962mph :fance, 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 startingl u1rj*0bm(/s d3 kks9bw h)gm from rest and uniformly accelerating across the floor. The time and distancbu w10js3kgms(*k hlb9m/dr )e 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 starti8eutui)9b-1ssa u99 mb7c tq ang from rest and uniformly accelerating across the floor. The time and distance traveuubism)a9ebs-78qt 91c 9u a tled 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 repwn e8-v9x 6pf9*jruwvresents a toy car starting from rest and uniformly accwu 9xvwp9- nr8f ejv*6elerating 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 shojf8sgl0w 8s ;q pg1j8koyg)x(ws a uniformly accelerating ball. The position of the ball each second is indicapyx0j8)fgw8ogqgls s( ;k81jted.
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 positio7 g7dy2h coml/n of the ball each second 72m7c d/hylgois 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 moving in a ssokqp+m;c;b a3 h4l5e traight line is shown in the grap; 5 ;sqmhak3ceb l4o+ph 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 ck3+eu+: akts-r rf6:kvq )mslircus clown on a unicycle moving in a straight line is shown in the graph k+ver6 :qk:s- fr+ku) 3l samtbelow.
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 the9;o1uh +srpn z 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 tabkq-s hdol(w )rfu5 yw 1u.s0*rle top for 10 seconds. For uhsr0*-fu )rdk5w (s1ylow.q 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 describes the motion of a marble on a table top foja(w15 * -gt ddtd:7y yc6blixr 10 seconds. For which time interval(s) did the marble have a posi7ttddidyba y :( jg*xc 6l5-w1tive 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/6 f f iw::mit*8pzpyg for 10 seconds.i6tgyi pzf mp:f*8 :/w What is the marbles 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 undbc, xi: yn wmd7:mh ye)7m (/;wg7qpxiformly 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 *n.yufmtuhu uqa, ,bk1i/: 4a$20.0\;m/s$, 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 lsfo6 *iy++ezfollowing graphs could correctly represent the motion of an object moving with +yi6flz+o*s e 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 accompanyitewe3y()0v /bz tkc(w/ 7wgbm ng graph describes the motion of a toy car across the floor for 10 seconds. What is the acceleration of theg/ cywvkewwm(03 t b(et7zb/) 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 the flo,i 3ua19 nrhfoor for 10 seconds. What was the tota 19,rnf3uoahil 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 toy car across the u/ w p*n8sj8wtfloor for /s 8uj8wpwn *t10 seconds. At what times or 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 km/hr to 60 km/hr in 4.5i(eg i 9*0fsri u8ud.c0 s. Which one of the following choices besturgcei .idus89(0 if * represents the acceleration of the car?

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43#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  06.07: A car has the velocity versus time curve shown. 2m0(jyq 9utdn- .c bnuWhich of the following statements regarding its mcmud- .qj90(un 2 nybtotion 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 movcqc(cupl 8yfr q/0s+2*,hddqes along the x-axis according to the velocity versus time curve shown to the right. When does the carq lq*8h(+ 0srp fy/cu,d cdqc2 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 ball is moved so zq:x lo0j,:haijiz-0 that the angle between the velocity and the acceleration of the jxzlazi0:hi-,:j 0oqball 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 apart and traveling-ieb fvmj98k8 toward each other.evfj k- imb988
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 thegdfo:5qur.he /9b dg m4n :f8e x-axis. When the acceleration is positive and increasi5. mf/9qubg8: efne o4 ddghr:ng

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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 opdppbq6+3,f of average 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 of+-kj 9k)rxli-o c,;zv8bye ot the following choices identifies quantities that must have ox 9+-ky,obzli;ek - r)jc8v tthe 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 movesfk bhonqncn 7/ u-t831 $3.0\;m$ 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-timek atwa2:n/(cscn +8j g rytg16, $y\;vs\;t$, 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 3:m7k0+rqws3;;oahc pw0 wj0 ice npz for total time T in two pa;0 3 w oczhnw 3j;mk7wsp+:pi0 qecar0rts.
• 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 oq+h19ba rqo m2qn.a5 a car on a straight track is shown in the diagram. The thick line represents thn 9hqa+1oarb52 qoq m.e 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 jtq:hwy12-ru7d-4 fs9h b68xjna x dqof a car on a straight track is shown in the diagram. The thick line represents the velocity. Assume thatd 8-nrw-sh 9:tqx46qhb2 x dfj7u ayj1 the car starts at origin $x=0$. What is the average speed of the car for the 10 second interval?


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55#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  09.08: Consider the motion of an object given by the position vs. tihn58+aepu1ev me graph shown. For what time(s) is the speed of theh5 uepv+ne1a 8 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 velocityb:v:sqy1 q .a b;dvi8j vs. time graph shown. For which time(s) is the acceleration of the objjy8sqi:vqd.b;bv : 1 aect 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 acce 5nxzvfd: s wp(n50cf8 cv;:j) p+zvzbleration vs. time graph for a fixed time interval of an object’s motion, what quantity has been :xvvsjf: n8d (v cn+w)55b c 0zzpf;pzdetermined 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 6z a *sekmgf5a8c6e p+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 twm:vg 7: u3inkdo 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 inp;zn fd d:s:el;i4:tx c6b9yv 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 isogkj hd -85icbyg0m0qhs/ :t5 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 graph of a particle moving along a horizontal pd,;lnw nz6ms:a;k lppz0q.7 axis is shown. What is the total distance travelp;adwm6p. ,npsz 0z;l qn7: lked 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 foll4mff l5lu959rxj j ym*owing choices correctly identifies all of the listed situations for which there is a non-zero accelef myr4l59j x l9umj5*fration?
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 *y7pm(i.oej fqw1ubw *+(pii vs. time graph for an object moving along a line is shown. The object starts from* .uj ip ymw qwiope+(*b7(f1i rest at time t=0 s. At what time(s) does the object attain a maximum displacement from its starting position?


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65#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.17: An object starts at the origin and its velocity along a line vs. time is xa(m3-pzz i w.graphed. Which one of the following ch-z( a3 p.xizwmoices 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, each wcf enlc n478e3ulnv 83ith constant acceleration. At an instant of time, the information about the cars cu3 v8l 8nl 3nece7fn4is 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 posiz5l) t p;h4juetion $x$, 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 sj n(8os fvk0qpid3d0z.1 hlj0hown in the graph, which one of the following choices correctly describdz0pj0vkfnjoid3lq 1 8(hs0.es the relationship between the average speed of the truck to that of the car?


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69#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.42: Which one of the following chop2g+/rrz i cotp s*;r8g 5qgz.ices best describes the instants of time, at which the car and truck travs*go8gr qp r2gz. 5zc t;r+i/pel 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 move ax8xuh -. kh8xplong the x-axis. The acceleration vs. tkx8xu. xp- 8hhime 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 objectnf; i.* uyg6ll moving on a horizontal line is shown. At what time(s) is the object moving with its greag 6i; lyf.l*untest 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 fi,.6ly :kloqz ollowing the position vs. time graph provided. During what time interv:lo 6 yzilqk.,al(s) does the mass have zero acceleration?


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