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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 travelsx1zcz tm l7c-uz p+0xssy/*3s at a constant speed around a circular path of radius $R$, if the particle makes one complete trip around the entire circle, what is the magnitude of the displacement for this trip?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.01: The change of distance per unit time without reference to a parzil tw6dig- yu2 q8qcn(x52j9ticular dird2 8qtxq i6gni wu(-9 5l2jzcyection 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 anes at,w y7:k1x average speed of 50 m/s and then completes a second lap at an average s k:1xest, aw7ypeed 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 con qhv;a w4a 3:*.benvpmstant velocity. If it continues, how far will p nbew.4va;3 hqm:va*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 sta 8 d/z1bvcfp) h;jy(jntionary 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,y1 jhb;z() 8d/pcnvf j 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 trri8 8a 3 h,eoe6gt30,vzn sagtavels 400 km at 80 km/h and 400 km at 100 km/h. What is the average speed of the motorist on thi zgrn3,0tea88a,v t3i sgeh 6os 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 the x-axi;syo -v,h q(2 qwplq;qs. The graph sh lq q(yv,qw2;-p;sho qown below is a plot of the car’s velocity in the x direction, $v_x$ versus time $t$.
During what time interval was the car moving towards its initial position at constant velocity?


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8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  97.21: This question refers to the motf.om* tlw *fqv0r/g4)y4udavion of a toy car traveling along the x-axiw*go vl4r mqdfy uft*40/ a).vs. The graph shown below 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 t tvtkg*71rv,p he motion of a toy car traveling along the x-axis. The graph shown below is a plot of the car’s velocity in the x direction,tvkr 1gv ,t*p7 $v_x$ 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 veloc/zp(dln (gb*rity vs. time of a duck flying due south for the winter. At what point did the duck*(d znb/rp(g l 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 e:1 -ieqr6b 8khz j/zd(e z; xenky;/bto the diagram below which shows the position and elapsed time of a car s-b6 kz;;h i/re ye kezx/8 n1bzqe:j(dtarting from rest and uniformly accelerating in a straight line. What was the average velocity of the car during the third second?


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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.18: This question refer to the diagrfybvjv:a .u ct:7i )(8uy qk-ja n.9e6 ;ktunwam below which shows the position and elapsed time of a car starting from rest and uniformly acceleje: auk .y (c8u;7tfjvu- vtbq yw6:)nin.a9 krating 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 objectkciia)t3goi9 +t1k/ w with the position time graph show/ckw3akgt )ti io1+9 in 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 folly cmh5t.z,x (3 t/xgnsowing information. An ideal elastic rubber ball is dropped from a height of about h.s (m5c/3,txgxnytz2 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 t1bt 7jul3a-99u1dmbh+qyld9,ji j k n o the following information. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the faluuy-9,+d9m3tqk7911 di n h bljj jbloor 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 9p8cc2 irp8ftspeed 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 following scen25r*hqfnqn v,)c6fly ario: At $t_0$, two cars moving along a highway are side-by-side as they pass a third car stopped on the side of the road. At this moment the driver of the first car steps on the brakes while the driver of the stopped car begins to accelerate. The diagram below show the positions of each car for the next 5 seconds.
During which time interval would cars #2 and #3 be moving at the same average speed?


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18#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.02: The question refers to the following sc otey.up :frv1a2v/10s+zg0w2 hz.wkbi oty4enario: 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 pia 3wp 1gvh(ff -.5yito 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 follow6orirr +smg gs7 e5q5 mub6)b3ing 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 horizontakm uuqa 4ggp.6j(5a i9l table top and off the table edge. Which of the following would best represent a graph of the magnitude o549aj 6gmpqau.k (u igf 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 relatiomquq;/b*bnb j7 h2+b ynship between distance and time for an object that is moving along a straight line. What is the inq jnyu;b* bqhb7b2/ +mstantaneous 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 between04sn 67a: rw:g7zcoid ,yag hw distance and time for an object that is moving along:na,w yr07 gd7ao :4ich6swzg 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 u8x 8+dd 5gnpr;ovl1t thrown straight downward 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 1 tuno 8x8l5+vdpr;d gof 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 ca gp:+7tfw5kqq uo.xg7r starting from rest and uniformly accelerating across the floor. The time and distance traveled from tf.5xgtw :7gqo 7ukp +qhe 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 repres)az+aza 5)fi )a1wen wents a toy car starting from rest and uniformly accelerating across the floor. The time and de a1n)z)f5wwa +azia)istance 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 -1id5o;bcep pa toy car starting from rest and uniformly accelerating across the floor. Thd;p1pe-5i cobe 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 the8 ao .j24,uvxn6l6prms h)vml ball each sec.jp6hvmll,vr)so 4 anum82 6xond is indicated.
What is the average speed of the ball between 3 and 4 seconds?


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29#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  04.09: The diagram shows a uniformly accelerating :m9mqn6jj 6n nball. The position of the ball each second is qn69 n6jj:mmnindicated.
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 stra0 9c.ni,ol i r(yg8qkcight line is shown in thrn80 9oi.cyg( li,ck qe 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 straigqm39*c /qq) c-ynzlxfeat (mc)x6v1 fht line is shown it)- 6)v3fx1clfm/(qqy9mqez c c*n a xn 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 freely i *z(9kbzy z8v4qd l 7/udgq6jin 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 marble on a tablc etvwyqeh1-h1bs )458eqxc 9aiv4+ oe top for 10 seconds. For which time interval(s) did4 q e vx81q-)+b 1ih9oveth5 saycec4w 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 describa9 p d/gz fl-e*a*zec.7)dtmfes the motion of a marble on a table top for 10 seconds. For which time interval(fg*ep/t dcema*zl .-fa)z 79 ds) 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 marcnhqk; 76)mrable on a table top for 10 seconds. What is the marbles average acceleration between t = 3.3 s and t = 3)r7 ;cm6ka nqh.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 waxj.x.jivkq tz(805 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, throwbh0 6q( c 5 7axzf7nd/obl4gwpn straight downward with a speed of $20.0\;m/s$, takes $2.00\;s$ to reach the ground below. From what height above the ground was the object thrown? Ignore air resistance.

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38#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  04.03: Which of the following graphs could correctly represent t j dr9(fv +gl.bb)/*sjemz,lk7krw5 xhe motion of an object moving with a constant speed in a straights+x)jr/fjb rl.5bg z*wvmdk 9e k,7l( 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 graphnnamzi ,+)v5wqj y07t describes the motion of a toy car across the floor for 10 seconds. What is the acceln,mw0 vq+n jzyi t)75aeration of the toy car at t = 4 s?


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40#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.25:The accompanying graph describes the motionom :oqf)q5gxgw+8n z) of a toy car across the floor for 10 seconds. What was the tmfw5gz)n:8oqqo)g + x otal 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 t;(3tts o lnmv)dkemu 9s63.t doy car across the floor for 10 seconds. At what times or time i t6);u vos.m9lksed( 3mtdnt 3ntervals 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/ awpl()j* cj 0u0/qcv syhl5s6hr in 4.50 s. Which one of the following choices best represents the acceleration of th/0 hv 6lw 05ja)c*uypssc(jqle 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 the foll ,m0-.1axz kuqy;+dfyuh3qp jowing statements rex0z;1h-a yd3pu+j u,y fmqkq.garding 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 alo7fs1b c*7; xgjh+wsb ong the x-axis according to the velocity versus time curve shown to thesws 7;jxb*c1h 7bg+of 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 ball is moved so that the anglev)inq4yoos.4x6 vh0 m3r h d7i between the velocity and the acceleration of the ball is kept at a constant 120 degree. Which statement is true about the tennis ball during this int3qd74)iso64x.vn mhrh 0iv o yerval 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 othe*-to2w( ybrh)gh(ozb8p sr 3(ae2 ewj r.yshe ab2o( jwz-rtg()*2eo3w8h pr(b
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 move:-g f /ucu:o-cl0wo -xrot5vp s on the x-axis. When the acceleration is positive and increas:u f-u05c :voo-cotrgl /pwx- ing

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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 averagetwi lfqc;r;6ny.40df 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 the following choishq,hlr6mmy*up* j9 *z v54anvf-8zices identifies quantities vv ,j9q*lhzfinr58h z6- umpys4m* *athat 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 mov1wldz3j j3dk ,9d7ln ges $3.0\;m$ 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, z 1;b29 qiayuf3b/osl$y\;vs\;t$, 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-dimensif(v0s 4shs+rt +terx(w wc39nonal track for total time T in+3rscxt+ wnrtw((shfs40v9 e two 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 g1hwha+ii9l 7 ym :lgw 4t:jg8fraph for the motion of a car on a straight track is shown in the diagram. The thick line rjwltiy1h f w7ga9hm ig+: l:84epresents 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 n z r,d5w+, us1zgvwz7the motion of a car on a straight track is shown in the diagram. The thick line represed,+rz 5 1wzzg7 us,nvwnts 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. ti6 xd3r61ytf mnme graph shown. For what time(s) is the speed offt3 xy6 dn1m6r the object greatest?


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56#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.11: Consider the motion of an l(h:ff nvr9bgo6x r+0object given by the velocity vs. time graph shown. For which time(s) is the acceleration of the xlh 9n: rbo f(fgv+r06object 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 kbkiujiv91. n.b +s5z for a fixed time interval of an object’s5ubb19v .nkjikizs .+ motion, 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 moves along a ho g/i:20*ql izm. ei1k+ hvcqqy )sp4pzrizontal 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 xd2yms yly7(b+jcom, n1s(0e/ri k7 pparts:
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 v3a h(3 gmdpp*f,izz 0from 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 gj; *xo*7xuewbround 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 oyon0;o/af a)frc k7r8 vwj.sms +n+j3f a particle moving along a horizontal axis is showo7/nm0+rnjva;c s) 3.sf8okw +ayjfrn. What is the total distance traveled by the particle from t=0 to t=10s ?


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63#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.18: Which one of the following choices correctly identifies all of r/9 n mfdw2cod)vx2m/ the listed situations for which th/w)dnv/22mof dmx c9rere 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 o g1gur q7-g3yobject moving along a line is shown. The object starts from rest at time t=0 s. At what timeu31gg7ryo qg-(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:h/xo)4q0 ib.faex on omm2y+ is graphed. Which one of themy2.o:xo 4x b o/mha) q+n0efi following choices 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 avl ho 2f9s(l2z horizontal track, each with constant acceleration. At an instant of time, the information about the cars is show9( lzo2lhs f2vn:
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 hasz arq (dxna.kw:o 4b*; 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 ,).iwm +yyxe 05h tpt8dfkvu,time shown in the graph, which one of the following choices correctly describes the 0 xd,v)hem ty5t ,kywp+8 iuf.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 choice*zhw*hhm9k e)hs a9(5q+f .mi( fd-uwkx, tprs best describes the instants of time, at which the s9hx+(uz*mhktq d*mafwre ,5hi pk w9h.)f- (car and truck travel with the same speed?

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70#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.30: Two cars P and Q, each start from rest at the origin 7 kx(em+3 znbfand will move along the x-axis. The acceleration vs. time graph for each car is shown. Which one of the following choices correctly identifies the relationship for bot3mn7xbk ze(f+ h 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 -h4 7rxuc .wv0k h7gtkdlq-1ngraph of an object moving on a horizontal line is shown. At what time(s) is the objg7t07-1 qxl 4k rdcu.-hnwkhv ect 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 followi/d6i )9tutvlr fvp ,)ycc 8w7mng the position vs. time graph provided. During what)wt7dv c c86r ) f9u/,plivmyt time interval(s) does the mass have zero acceleration?


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