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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 around a circular path of radiusgp5 g1m swo 3wxu+u:xi bd79/g $R$, 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 timwv*er/ *n u-d7dzrgm* e without reference to a particular dir*r7n*-ud*rw/zmdv g eection 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 anzdcc/5l3 aqzd +sx1v , average speed of 50 m/s and then cc1, zv3+s x5qcdaz/d lompletes 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 v2k/3wus 3tfh20dn bxvelocity. If it continues, how far will2 ufn0d b3x/k2 3svwth 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+y :z8.fwccfz 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 the pzfyf c :+c8zw.lank. 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 if-* s ixifj5 ltqm9rg:c/ :t+fs the average cf-f*sqlgx9/i ir:5:t+tmfjspeed 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 t9*h3gqc+ksvp. ucpd 5r s;-o6yoz 8nto the motion of a toy car traveling along the x-axis. The graph shown below is 6+3h8g *sp5tu vzo ;cyo d9ck.qr-nspa 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 refsxxgbe2szq/ l3akw 34 g.bt+:ers to the motion of a toy car traveling along the x-axis. The graph shown belogbxa+3e: 24/qb3 .kwztglss xw is a plot of 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 motion of e,imwnkw2n0* ) xwp8qzv.y2 a a toy car traveling along the x-axis. The graph shown belwwke,yzm 8p*n)2ixv0 .2awqnow 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. hl7gqjrnc+ j(y)t 2e1time of a duck flying due south for the winter. At wq(c lr1ght7nj )e2yj+hat 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 which shows the position an sz ;9fp fvwlr5e5v4+dsk* a6nd elapsed time of a car starting from rest and uniformly accelerating in a straight line. What was the average velocity swv59fdlzr*e5pv sf k 4an ;6+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 the7lvq a;h55 klhb.ucx* position and elapsed time of a car starting from rest and uniformly*;alv . x55club7hk hq 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 th(64 cmtc0sddje position time graph shown in th s4dtjc(cm0d6 e 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 ref ,izdfc8q9 y2vhm5mcmq 1 :azx 29,ltaer to the following information. An ideal elastic rubber ball is dropped from a mamcci8q9 z z92v2x5mhaqyl1: tf, ,dheight 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 oe3zi8.e exanq q7,:qthe following information. An ideal elastic rubber ball 3iq q7qxaz,eno.8 e :eis 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 travel with a speed of pt9k/ yx 5 glro3* 1atcbm/dc-apg7i5$v$ 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 0i qmc/m3fx8 t +x inmp0sm-w9refers to the following scenario: At $t_0$, two cars moving along a highway are side-by-side as they pass a third car stopped on the side of the road. At this moment the driver of the first car steps on the brakes while the driver of the stopped car begins to accelerate. The diagram below show the positions of each car for the next 5 seconds.
During which time interval would cars #2 and #3 be moving at the same average speed?


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18#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.02: The question refers to theq+u ue(moqh8n15qa 82tfa g)h +a )hku 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 l y63q) egvgp-refers to the following scenario: At $t_0$, two cars moving along a highway are side-by-side as they pass a third car stopped on the side of the road. At this moment the driver of the first car steps on the brakes while the driver of the stopped car begins to accelerate. The diagram below show the positions of each car for the next 5 seconds.
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 theoic x xo3/ qodx/d;d6e7* .dhe 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 ho*yp: 4x,:ujwz bdz* oik-k hu6rizontal table top and off the table edgz 6*iw4u:* -k:u,j hybdp oxkze. Which 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 representsu n7-hwns0vt( the relationship between distance and time for an object that is moving along a straight line. What is the instantaneous speed of the object at t = 5.0 secosvntn 07 -(hwunds?


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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 time for an o6x96 j/knb+2 j dx2aezt,lwsubject that is moving along a straight line. Between what times did the object have a non-zerj an/b ez2dx l9,w s6xt62u+kjo 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 dowu*u5a4/0e r/ kansoua nward on Earth with an initial speed of 12.0 m/s from a position 10.0 /oaua/ s nk4a50e ur*um above the ground. Ignoring air resistance, the speed of the object when it reaches the ground is

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25#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.11: The diagram below represents a :2gvcr um4o41yq:qihs3ceej8 yu 6-f toy car starting from rest and uniformly accelerating across the floor. The time and distance traveled from t1usy2 fg m:e3jc4u6h:cv- e8yr oiqq4he 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 st:br/jqb - q2xiarting from rest and uniformly accelerating across the floor. The time and distance traveled from the sqj:ib2 bqxr/ -tart 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 fromqc7-uwfk,h-fqfxk8d i3*1 qo en1r5 u rest and uniformly accelerating across the floor. The time *7 5fd qo- hfi,1c38eq-ufrknuxqwk1and 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 ball. Thedzwl0dh 6 e(/wr8rf*0 20cl,w8uj nzvqy* yp l position of the ball each second is indicated. q 6lw8/cd 0ylf,v pde(rz8nz wlwu00* h2j*yr
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 b:u(nqo 9nkbn 9all. The position of the ball each second is :nbokunn9( 9q 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 straight 2:6ilxhi /sso1bs* wfqygi 78 line is shown in th12iqwxyih:s s biglfs86 7* /oe 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 i7lu; sab7 zou0zm;q8o s shown in the grap;zosl7uo7; ab z8 muq0h below.
After 12 seconds, how far is the clown from her original starting point?


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32#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.04: When an object falls freely in a vacuum near the surface of the earcquhfc,9sd 99ni d .x/th

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33#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.11: The accompanyinc yw 9*j g,+z l3fx7rdxac84jeg graph describes the motion of a marble on a table top for 10 seconds. For which time interval(s) did the w,yc j 4xrefcxz* 7+d9jga8l3marble 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 ofg v3 ;7rmscxw,.snr)u a marble on a table top for 10 seconds. For which time interval(s) did the marble have a positive rr n3vsxw7ms; . g,cu)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 e ot4:oy*u3 l+hdx 6rhthe motion of a marble on a table top for 10 seconds. What is the marbles average acceleration betwee uedoh roly4t3+* :6hxn 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 u:vbk1kdmoo+ is e6ztifp ) :.-niformly 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 down*j;x ku)l;nyv ward 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 following graphs could correctly represenxne7kb.6t y(3y ob/ xwt the motion of an object moving with a constant speed in a straight line? x7kbb.wxey6 t(yn3 o/


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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 acros am 3e 3,cny7*3cqbolgs the floor for 10 seconds. coa7*33lb ceyn 3gqm, 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 grnpj0 iqc6bx/i-,hcnt g.0q 4:ino l9 zaph describes the motion of a toy car across the floor for 10 seconds. What was the total displacement of the toy car for thn04c0/xp6g oi.9 bni hqjlz-:iq n ,tce 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 0v n zulxugon/pe(*8 bpa*dqd /b1tfy 3/re4/toy car across the floor for 10 seconds. At what times or time intervals must the net fpq 8* fx1 lad//ruud4o0gp/*eyeb(tz/nn 3vb orce on the toy car be zero?


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42#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  16.03: A car accelerates uniformly from 0 km/hr to 60 km/hr in 4.50 s. Which on)obw 0o ( 1iq7pxkuln7k/,tr je of the folpiqo/k7kb1) lxo,(tjr0u 7 nwlowing choices best represents the acceleration of the car?

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43#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  06.07: A car has the velocity versus time curve shown. Which of theqvci6s :+sd ui/hyp5) following statements regarqd5i+pc yhss)6 i:/vuding its motion is NOT CORRECT?


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44#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  07.17: A toy car moves along the x-axis accordi4devg;.agak/ ng to the velocity versus time curve shown to the right. When doeag; vgk a4/.des 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 ball is moved so bkz) ehozq16yi zm 1--rm-w-u that the angle between the velocity and the acceleration of the ball i1u -wo z6ek)-bz- 1mhmrq- yizs 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 toward each othey.f n* +koosd0r.0donysk . +of*
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 apbt 6hm r ifs bhs64d;321r-cund increasinpm3 s4 i1c;ts bb6hd6-2hfrr ug

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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 lev tm sx5j ;z0tq583paverage 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 di:9lbo8:a pjjx mensions, which one of the following choices identifies quantities that mubxp:j :ojl8a9 st 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 yg j o0;tic7v*$3.0\;m$ 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,phs) - +i4pcaih iro7 1rc9zf9 $y\;vs\;t$, 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 trackk 0bz9sqksr5 6 for total time T in two parts. 56s9 krqsbzk0
• 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 mos b+6h,lkh)zs tion of a car on a straight track is shown in the diagram. The thick line represents the velocity. Assume that the car starts at s)szkh6 b+ hl,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 motiol93+gvuspzyd9. r oaq9 gjk2-n of a car on a straight track is sd+9y.zk r3g uvlq2p9g- jsao9hown in the diagram. 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 object given by the position vs. tkkch7i z)hjbnwb/5oem w (-0 4kl 5.foime graph shown. For what timk4zn5w h7lbkim 5oj -(/b0cfow h.ek )e(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 mona *7va2nl4y y5yb*rwtion of an object given by the velocity vs. time graph shown. For which time(s) is the acceleration of the objea* 7n ayyb4*nyrl 2wv5ct 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. timnpz ,x uda4 9+ya:i/ju4y a5lcu(jua 3e graph for a fixed time interval of an object’s motion,/a9yl (z4j34ua,uaic un:ay+ pj5 du x 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 move:v8pbc wv42v uxp4i /e5ou+5 im2mnre s 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 twbrk3vnsc 4+s565if x xo 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 frodlx34eq(6c13pz,1j*ywqy7/las 5nshovh r hm 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 f 6m(n)rl13xxcj3 (eevgk(na u:ss :py*+hzj 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 xsex0* 79*ca*si ffnwalong a horizontal axis is shown. What is the total distance travel *f*escfx07aws9 i xn*ed 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 8yn5eo /tq 3g x0;oxjg+7r zzfcorrectly identifies all of the listed situations for which tqj8 r/x z0genf zg573to;+yoxhere 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 movinmxhhonby5w 7iu rzj y;3(e79: g along a line is shown. z7en:jhxryy ih m59u (o3w;7bThe object starts from 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 oriickqr +uhi27. gin and its velocity along a line vs. time is graphed. Which one of the following choices best gives the proper intek c+u.qrhi 27irval(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 movin) m(0lpn9h ofxf2.ydu dl/pp2g to the right on a horizontal track, each with constant acceleration. At an instant of time,lmhp2d9( y2xl)dup 0f.o/npf 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 posi, phf vgl; qz-q528cnjtion $x$, 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 shoh yrb:-v)- bwt g6a2mkwn in the graph, which one of the following choices correctly describes the relationship between the average speed of the truck to that ofbt bk-mv)2- ha: g6rwy the car?


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69#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.42: Which one of the following choices best describes the instanp 89s)nses/w 4(.sk5z ezibxtts of time, at which the car9ezss)w4zt/ . n( bssk8xe5ip 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 wilc la j3+o6.vyvl move along the x-axis. The acceleration vs. time graph for each coa l63yjv+v .car is shown. Which one of the following choices correctly identifies the relationship for both the speeds $v$ and the positions $x$ of the cars at time T?


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71#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  16.02: The position vs. time graph of an object moving on a horizoya.+1sn 4 fdt;m,1 vje wvkt6antal line is shof+njkwvtadv4mt 6s;a1 e,1y.wn. At what time(s) is the 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 following the positi12*or u*l906y) odsxa2j 6o udckuvimon vs. time graph providcu 6) s*od96 yiuaoj2*21lk0rx ovumded. During what time interval(s) does the mass have zero acceleration?


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