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



 作者: admin   总分: 72分  得分: _____________

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

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1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.10: A particle travels at a constant speed around a cir2ot65fags( 2hbyq,x;lp)wjie p; f v;cular 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 referbt((.f cb9 w,k1eahar ence to a particular direction is calledabtrb.f(a e kcw h9,(1

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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 )z,5wzbct mkfxu(55j at an average speed of 50 m/s and then completes a mcw f(bzj uk55zt) ,x5second 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 cec o64 k7-buczontinues, how 4c -zeo u76cbkfar 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 at 5.00 m ru2az- ;6 wgxt*o9gqi/s to the right across a frictionless pond. The boy then turns aio6w9gg *z a-tr2;xqund 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 km0c kk a)yhw;mf1kw,e+ 2lcjn0 at 80 km/h and 400 km at 100 km/h. What is the average speed of the mow me2,+kfhnlacyjkk)01 ; cw0torist 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 toy car tr )6reb.t,/4xcxgs c wraveling along the x-axis. The graph shown below is a plot of the car’s velocity in the x direct rwxrc).4b6g xce/st,ion, $v_x$ 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;sso6ushkwia7b 8 8g4 toy car traveling along the x-axis. The graph shown below is a plot of the car’s velocity in the x directionashg; 8ss 786wio ub4k, $v_x$ 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 o a8)u7djr- /fet oh0zcar traveling along the x-axis. The graph shown below is a plot of the car’s)z a-f/d oh ojtr7ue08 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 veloci26 xs,k-8z:b*sp :cal gy k4xpgr* ylodk-e-tty vs. time of a duck flying due south for the winter. At whagdytc8 bs 2 y6 k-aek*s:pr -llkp*xx go,4z-:t 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 th g,;,a dlr6slrtt3;jae diagram below which shows the position and elapsed time of a car starting from r,ar r ;;l,aglst6d3tjest and uniformly accelerating in a straight line. What was the average velocity of the car during the third second?


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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.18: This question refer to the diagram below which shows the position andz(gm-2qdec h , elapsed time of a car starting from rest and uniformly accelerating in e2dc(-qmgh,z 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 th:z ztsi0 o8l; +vdpgr8 q5t8lge position time graph shown in the diagram at right? s8: r t;gtllp0 88zdqzv5 +goi


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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 c2. 1 cufg.h5 gcxuepu 9om,0vthe following information. An ideal elastic rubber ball is dropped from a heig2 19,g.p c .uvc0u5fmocgeuh xht 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 information. An)2+c lfhslovd5a41 ly ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor and rebounds acy12fl)5 4 +vhsdlolto 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 travelcr 3f,nthl v(s74 2gns 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 followinm;8l;z7c mkuj 8mzd,jrq, 0sxg 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 followin8n1cy xod yv1otm:;yz(fd a07 g 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 fs0 y ce 81dnirdd+fo37m:e4qw/vof,b ollowing 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 th v:.y9 vw3n:nwlyqg *rwry,o x16/qxoe 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 horiza5bc ybz)1bauu)smw w97wi o6l; 8sl2ontal table top and off the table edge. Which 9 z78 1 wabb)clloiwm)5wassyuub 2 6;of the following would best represent a graph of the magnitude of the ball's acceleration vs time?


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22#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.01: The graph repr zth0+tyqx k1r;7 chku0buo,90j( pdtesents the relationship between distance and time for an object that ,0kr(y0 t1hxbp7qcu9tkot ;j 0zh+ udis moving along a straight line. What is the instantaneous speed of the object at t = 5.0 seconds?


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23#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.02: The graph represents the relationship between distance and timt1oisi3780 vmr 0aq ehe for an object that is moving along a straight line. Between what times did the object have a non-zero a01oesih ia837qtvrm0 cceleration?


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24#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.07: A small objec.xwpm0 klyitg,:7rn/ t is thrown straight downward on Earth with an initial speed of 12.0 m/s from a position 10.0 m above the ground. Ipg l7 nwm0/riyt ,:k.xgnoring 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 re-pp i8upi2 4rdkx:kybt(6c- pj,zo+dst and uniformly accelerating across the floor. The time and distance traveled from the start are shown in the pi c2p+pyj 8kzrok- (b,:4 tddxp-ui6 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 fu nw607xqp )24 zoga02vr wjjwrom rest and uniformly accelerating across the flowjwrn2g zj) w206p qu0xv4ao 7or. 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 starting from rest and unwy( dot xl7t56iformly acceleratingt6 5d lw7y(oxt 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 acceleraj: palr:+uy7 kyxd9z6f0)/urmv c4,dr s6kgrting ball. The position of the ball each second is indil)uyc vy,6jmkruf/ s4 :a: 7rxd k0pd96grrz+cated.
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 posi)9hlo: tiu hf;tion of the ball each second is indicatl:fhuo 9 t;i)hed.
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 movinl g: ef5 v* kmew*iy-s;9oihn7g in a straight line is shown in the graph bekl*vf-io m*:hes9 ;e7 wy n5iglow.
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 ybwn lwe(i)).mmkxujf,**u tl3 /3ama straight line is shown in thula*n3w/* il) ,(.m xbetf jm) mkyuw3e 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 faw 4a *5l;wez;rsct,e wlls freely in a vacuum near 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 motion of a majmf 4p38mh-rl0 k1m5frc+0df)e tp miet t;n 4rble on a table top fojfle3 0 ftmetd5ctmr40p r-;4 18 mkhmp)ni+fr 10 seconds. For which time interval(s) did the marble have a negative velocity?


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34#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.12: The accompanying graph describes tnykz .6zg5 l. e)irsxz*1d0wqq +xmg *he motion of a marble on a table top for 10rizkx+* elnqsyz*6m15 0gx)g dw . q.z 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 d v-ranjx- ti:l gz4f9(escribes the motion of a marble on a table top for 10 seconds. What is the marbles average acceleration between t = 3.3 sl(ga i- rfz9j-4t:n xv 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 fq6q m;s dec xq :5m)b /uo:a.hn*gk8ubrom 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 d+b :z2suy:5ef dq o7bspeed 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 folvgl 1 bmld 2+fmnn/s(*lowing graphs could correctly represent the motion of an object mov(m1*+2 /ndgb svlnlfming 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 graphx.dr6q)5sjzs647 gy:3 p pesjd xmi +/vdax 7a describes the motion of a toy car across the floor for 10 seconds. What is the acceleration of the toy car at t =jp.7d6+mp5zr7x y/dxe3:g4 xv)ais6s jqa ds 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 describeh/5 hi5em .mv fq-8)itwkgk z+s the motion of a toy car across the floor for 10 seconds. What was the total displacement of theh8f tiqe. kz -gk/+5w5miv)mh 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 mol*p:7j, ug(v jmet.kgtion of a toy car across the floor for 10 seconds. At what times or time intervals must the net force on the toy c.:(pm gl7jtjgkv,u *e ar 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 k sykm+t3xgw i)5e44lkm/hr to 60 km/hr in 4.50 s. Which one of the following ch)3tlyi4m5+k k weg4 xsoices 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 abur )uu6ifi4qi5 u18 versus time curve shown. Which of the following statements regarding its motion is NOTu148 i5rui)qai6 fuub 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 ve4ehjn4 -bz 6*9z4d o,ydtxgig rsus time curve s* 946eb z hz iggjxnd4-dt4,yohown to the right. When does the car have zero acceleration?


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45#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  06.22: During an interval of time, a tennis bwa/4zhehf 9f p:a p8h0all 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 bp:0h9 ap/z4effawh8h all 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 towubq5a 7yfik4w ih*1zp-a0 vi+ard each other.z h1+ -u5qp*y04ii7fbak aviw
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 accelerad 5gsmt- v7k ;ekalkf6p1;,m ition is positive and increa g;d impvm fka5t6k-, e7k;sl1sing

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48#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  07.12: The definitio0ekl u (0eyancuza2(e39m .l tn 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 off j irq5 iyjmza02f6/2 the following choices identifies quanyj/m20rq af5i2i6 jzftities 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 movl3cjjm) ;,g2r rr r2ores $3.0\;m$ 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, vy0c86v 9vun3,kr f eg 0hvg,x$y\;vs\;t$, 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 alon n--xsuf0toau:qod w; c 25cn,g a one-dimensional track for total time T in n d0:uu5- fq w,-x o;2tcsoacntwo 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 graps4v;yufw xfb9.w: x*u h for the motion of a car on a straight track is f.:x 9uvuw b;s4yw fx*shown in the diagram. 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 w 00a8wtd-fe )kp .mhna car on a straight track is shown in the diagram. The thick line represents the velocity. Assukew d pfah0m )w.0-n8tme 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 object given by the position vs. time g)dum+ j8 ac/vjraph shown. For what time(s) is the speed of the object gmv8ujac) j/d+reatest?


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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 given3ds x e1nc 6m5batd-;pg wn8s3 by the velocity vs. time graph shown. For which time(s) is the accelm56 nc1s;-bgnes 3 adwt38xdperation of the object equal to 0?


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57#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.24: By computing the area under the acceleration vs. time graph for a fixed tm4*rbuu s3 p6fcz) m,cime interval of an object’s motion, what quantity has been d6pcbz m3su ,*muc4)f retermined 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 movy+-1 8cw dewu/;xjzhwes 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 tq o3ynquy4nce ,*+ 5vurip 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 ground in a time .u3 +o-jggcit6s:oeiof $2.50\;s$. 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 inpzh9 df 2i1vhc*(vg*x qy4d0 b 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 ap1(s)f4vkf,n gxhv1m long a horizontal axis is shown. What is the total distance traveled bvfp14gsx1n,(v f ) khmy 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/ li k r322csvw/u4z3r: mwbzk7(vkwd choices correctly identifies all of the listed situations for which there is a non-zero accel /zcruiwzkmwr kbv /:v24d 3 (wl7s32keration?
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 acceleratioh12: 0pkdase6)z9-oil*oopt r: 1y b2gawzjjn vs. time graph for an object moving along a line is shown. The object starts from restjb2oa-ws:pyj 0 aoeo2ih 9t:1d p z) zkr61*lg 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 r(ae(1*8owq fl2vf86kvjr mx at the origin and its velocity along a line vs. time is graphed. Which one of the following choices best gives the proper interval(s) of time for which t 8wv( fr(f*e lqroj1a6m 2k8xvhe 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 x8p q/ 2)pbhqn8)t u:ll dxpn4a3xa i(right on a horizontal track, each with constant acceleration. At an instant of time, the information about thqna x2uppx8 3ani/lxbltdp:hq() )4 8e 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 po2qv kd yin5(3dh6fvi4sition $x$, 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 the following choi l/:desk 8eq-n*yj9tf ces correctly describes the relationship between the average speed of the truck to that of the caqk:eelt9* s8 y-d /jnfr?


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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 instandhb ursy + 0p4+xc.w 1tz9y1sfts of time, at whiczhu9xp+ws ydt+ ry4 s 011b.fch 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 restganfa;5+vv+nvc:) ci at the origin and will move along the x-axis. The acceleration vs. time graph for each car is shown. Which onevga fv +nc5nv;+: ic)a 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 obqg+f:6glzeln +*y-qix elw(md;7b+m ject moving on a horizontal line is shown. At what time(s) is the7n lqxqw+gfgb;em:ld *yem ++l(6 z -i object moving with its greatest speed?


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72#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.08: A mass moves along the x-axis tdgbk7mp y m+2,xy8:kf35t po following the position vs. time graph provided. During what time interval(: kb8y+p53mgo7 kdptf tx ,m2ys) does the mass have zero acceleration?


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