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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 circu.ves/g a4o ua2t xo71mlar 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 a r9wpyg fm.ig v.8q .r7particular dire.. m 7vg.f i8yqrw9pgrction 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 s*dh2uq8bi/cux .4pa49z w xwat an average speed of 50 m/s and then completes a second lap at an average speei4w a/sw.xp q9ch zdxu482bu *d 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.s+k3m h xu0bgf k7wp1/2;jew s/xbj5 i80 m in 1.0 s at the constant velocity. If it continues, how far wi / x5bbehw+pjf71 3s;g0mjwkxi/2skull 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 stationarj9p;nimc8iq* c kcf, hv3,z8by on a 30-kg plank that is sliding at 5.00 m/s to the right across a frictionless pond. The b9ipjcnk c f, 88mvq;3h,*icbzoy then 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 is thevr7qgg;* j*q( ng((b clh4 cfm average 4 r gg(q j;vq hgbcl*mn(c(*f7speed 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 motion of a toy car traveling along tha66rin; df7t3j2hxo j e x-axis. The graph shown below is a plot of thh noji6;63dxraf2 j 7te 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 ab//wbv hk(t1 f toy car traveling along the x-axis. The graph shown below is a plot of the f//(kbtbhwv 1car’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 jz/h 6war50ia refers to the motion of a toy car traveling along the x-axis. The graph shown below is a plot of the car’s rw 0zaj6a/h5i 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 flying due7- 6eka,ximx7;zsim7 wzwj1t south for the winter. At what point did the duck t i6i m ws1mwkx7e 7a7z;-x,jzstop 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 whibxq z3men uu19rg9hd,0u5w fnb4ei3. ch shows the position and elapsed time of a car starting from rest and uniformly accelerating in a 54in 3,r3zdf0 mwnegu ue q9.bb1u9hxstraight 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 w3e6nk5gvw f t5hich shows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. The average acceleration during the entire 3 second inte3 f6 5wn5ekvgtrval 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 ob, a cj,jjjbwu) jbzsh/tz n( m;*k,2n*ject with the position ti jj ** c zswub,a(n bz/tk;mh2j,nj),jme graph 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 inforzfx06m 4m9 )rpxtcp*x uj+l a,mation. An ideal elastic rubber ball is *rx )4x pm+axm, jc 0u9fl6tzpdropped 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 information.lxnm.ewh2h4 7i w)q) u An ideal elastic rubber ball is dropped from a height of about 2 meters, hits4hl)ie .mw hwqun)72 x 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 trave w:upxe7 fe .pa0+0cyul 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 followinga.ern opf7m- y)6 pe*s 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 follown1(1ln071l tngp(zq a0gfj3zot sy 0 oing 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 touf4d. q h;ee4n.lqhs * 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 the following scenario:+a6 t3,dnpku nvnn- qj0i8pd; 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, acr 4cu;rgz/5jx8t66u dp+p nxna oss a horizontal table top and off the table edge. Which of the following would best represent a graju6xz8 u6;g+ naprcx/dpt 4n5ph 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 rela t p;ac lyh:ll4)lds2w* nn*b9tionship between distance and time for an object that is moving al*pll )d l; cwt9ysb2n4*hn:al ong 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 relationgvl7k/ qa 2e*q f7/v,-g jtunpship between distance and time for an object that is moving along a straight line. Between what times did the object have a non-zero acceleration?7 gq* 2k/vgf ,v7-ltnju/qpea


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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 downwarday o4:sl u8 kjyn.38cnn7 cgk* 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 the object when it reaches the ground i. :ukc y8nl*7ayjng 4o8nkcs 3s

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25#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.11: The diagram belo)zq t q2t2vxb1 w lg7g.95txirw represents a toy car starting from rest and uniformly accelerating across the floor. The time and distance2t xlgq b1vx)i.w9r 57q2 tztg 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 bel)i-q o.jg0/ igo umli8ow represents a toy car starting from rest and uniformly accelerai o.qimul )8-g joig/0ting across the floor. 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 unifoktu h,f o7*4rvrmly accelerating across u7t oh fk,4rv*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 ball. The position of the bagj ay.e, g;f*4enfor) ll each second is indi.ye g4)f;j ,frg *onaecated.
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. T9m4mi1:tva 0i k ye;fjhe position of the ball each second is indicy1 ikmite0fv: jam49;ated.
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 circup8sh od n(1i (pj,:vhss clown on a unicycle moving in a straight line is shown in the graph belo(8(ihso ,pn 1dsjh:pvw.
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 movsfpp(2 ,p*lp aing in a straight line is shown ipp,(f lspa2*pn the 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 falls;/c/kf8*sbt lk k2 pc7oykvu; 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 grapr.)z: q;ne tsyh describes the motion of a marble on a table top for 10 seconds. For which time interval(s) s;r.t) z:ne yqdid 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 fo1)j fnx(e o3s) mg:setr 10 seconds. For which time inn(: eso3js)xtf1)e m gterval(s) did the marble have a positive acceleration?


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35#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.13: The accompanying graph describes the motion of a marble on a table tod tgg61 ggb, gpp:2u5l8p wm1yp for 10 seconds. What is the marbles average accelerationpyg 8,16gmw2 up5gg:b1 lgtdp 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 uniformly from rest for a s eyfz hj+2:uyy.g -2d,+xoustime 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 sp6u1i8huw 7ef evc4 nee9rq4x* eed 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 represent the motm :r)j1km 6wkwion of an object mk)jw 1w6mm :kroving 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 graph descri x v.f*.+2pisie(nx kw iw4m/rbes the motion of a toy car across the floor for 10 seconds. What is the acceleration of the .w xi wxrp /e*s4 .kfi2mv+in(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 i9i9 a5 yh/t .unije-qthe floor for 10 seconds. What was the total displacement of -9i at iejqiyu9 5h/n.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-gws pv7dc3 cnk+f ,x ;2fwt4v motion of a toy car across the floor for 10 seconds. At what times or time intervals must the net force on the toy cxv 7tfd+c wvk,3ps;fw2n- g4car 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 gsbp,v-(,f*gr h v) yxin 4.50 s. Which one of the following choices best represents thegvv *,ys )fxhg-(,p br 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. Whf,6jnfv*rpymk8svb2i 6 s2 :aich of the following statements regarding itsn6 vb2*ias,p 2f86yfr :vjsmk 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 then(smmj ,0ta f7 x-axis according to the velocity versus time curve shown to the right. When doenmf 7,(asmjt0s 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 t 5+k :i ndbe w/q-rdncyu(ii;3ime, a tennis ball is moved so that the angle between the velocity and the acceleration of the ball is kept at a constant ed;rc dy+:qb53nin/ w-iku(i 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 travoebk i5dg)* p0eling toward each other. kg dep)b50i*o
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. ,h ,js;xinoy 4When the acceleration is positive and increxins 4yj;,,hoasing

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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 averagku (t.m.nau /ge 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 dim.ocfxvkj ),2id.b)re f h2 ql0ensions, which one of the following choices identifies quantities that must have teb 2ohvrdx).k2j)q if 0lc,f.he 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 movesefolb0+: n-g /h0uvqk $3.0\;m$ 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, 7tzquamdnqw7p28u9l 6- g z8r $y\;vs\;t$, 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-dimenv7aq:zer+v 0 -p+pk 9+hxuhtzsional track for total time T in tqtpk7x-u+9z +:h+0h pzav rvewo 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 moz;+dtw1a6z2 gmoi y 3qy in-3ktion of a car on a straight track is shown in the diagram. The thick linwimyo1+ q z y2i- 6;znd33tkgae 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 motif( )5/m,h1juddk0nkrbdj ge2cn tr9 pc) 48bbon of a car on a straight track isb/2djedpn(cb rubkr))hm 0ntg4 918 jc ,kf5d shown 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 mey(nyce ,wukd 3k0:72x sb +qaotion of an object given by the position vs. time graph shown. For what time(s) is the speed of thexscn7 a k( kbd +qyweu3,0y:e2 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 a7eiu:wuxh *zp3 5dty;n object given by the velocity vs. time graph shown. For which time(s) is the ac y x*: uz53udtwe7hpi;celeration 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 9ns +hc8dg3cifxg g9*graph for a fixed time interval of an object’s motion, wh99 gcsgd8gx3ihfn*+cat quantity has been determined for that object?

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58#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  11.08: An object moves along a horizonpbo: ,*g -drfjd mk.h0tal 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 pa*idnj 0+g 4l cgp*tb1nrts:
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 ground2utwgl 9,t 1unuem 6to ,sk-g8 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 tr;;r 7f7w f;jldyy tu0he 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. timeknj iu)jed ( 33;;:lttiulz5 r graph of a particle moving along a horizontal axis is shown. What is the total dis;)l5lnttk zu;33jud ( rii:jetance 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 identifi e++ivo78arcmr 9 wqq*es all of the listed situations for which there is a non-zero accemqi8erqw * rav++9oc7leration?
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. timecm c2de):kly2bf,4 bj graph for an object moving along a line is shown. The object starts from resbcd2,f: lc km2)4 bjeyt 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. timepw n*j8-aw 1ki is graphed. Which one of the following choices besnp wk wj*81ai-t 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 m3s9*3bs x(r+o81qr tcwo mlcq 06uzxuoving to the right on a horizontal track, each with constant acceleration. At an instant ow clzsm r oc6rx83u0 1u* x+btq(qs93of 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)m 5:k+fzb g)uc8r8bof:mrh u a position $x$, 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 timem da,x5e9 lknxfd97sjm22 hz-g ix5h4 shown in the graph, which one of the following choices correctly describes the relationship bet9s2h,7ega- 5kxd49hdlx z2m m xj5ifn ween 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 choices best describes the instants of time, ma9 )b-,(jurjg hdwxu(j /5vjat which the car and truck travel with the same speed?jr9v m5udgu jaw( bj(xj-h) /,

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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 thu/yejnkc+x75c ngd4t7ft6xt7d3 la4 e origin and will move along the x-axis. The acceleration vs. time graph for each car is shown. Which one of the following choices correctly identifies xcd g76nycj 7f/l44 ta5 nu7+tde3ktxthe 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 horizontal - uv(mh;iv)lb line is shbm)-hvl(;u iv own. 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 fo5jy 8lq16jcofr2qgg+ 00w u cnllowing the position vs. time graph provided. During what time interval(s) does thewnj ruocq068g01q2c 5 jfg yl+ mass have zero acceleration?


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