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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-j5pw7 yqe)jt. f fm. hrjl)c2 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 r( ;vm f :1nfagzmp;,aqeference to a particular direction is calle( nm;mv fq,p; aza1g:fd

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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 lwis,-4+vv7p z e7jzcwap around a circular track at an average speed of 50 m/s and then completes a second lwv+7-se 4z7z iwvj,p cap 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 velocityi0jcd3cx d6 j 6y0bs;t. If it continues, how far will6dxbc t0ji;0 jcd3sy6 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 stationbe7) lwv(*w ceary 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 pl )wbl7ev(w*c eank 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 a;fuj .uxi.smgc *- ez7t 100 km/h. What is the a;-e . .mu*7jgufxiszcverage speed of the motorist on this trip?

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7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  97.20: This question refers to the motion of a toy car traveling along the xu,4z(i.m90rj0li y2l mtyqp d-axis. The graph shown lip0mr, d2 lm9j.y( uiq0t 4zybelow 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 s mha59uy7 u6yj /sx*nto the motion of a toy car traveling along the x-axis. The gsx9uuh5s 67*/anjm yyraph 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 the motis+ b (p;aj kd u7p:g6ru9nggz:on of a toy car traveling along the x-axis. The graph shown below is a plot of the car’s velocit ;9gunrbg:d z+(7uj s:6 kapgpy 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 dubgrgp 8w+0rp1s3ap 8ts (x8m zck flying due south for the winter. At what point did the duck stop its forwarszg8p3 xs 8rwgp(+ 0a tr8mp1bd 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(c5rmpr0io 0fbx(g ( rzvd 1mwi:wv)4 shows the position and elapsed time ofrf (gm)0 ( ovcibvx:4m0r iw rz1dpw(5 a car starting 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 diagram belowgel 38 nm7pb1m(2ymye dlo16e which shows the position and elaps1y7n8 byde32 o(m6gpmlel1meed time of a car starting from rest and uniformly accelerating in a straight line. The average acceleration during the entire 3 second interval is closest to


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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.20: What is the shape of the velocity time graph for an a0 cespc ugz fjs,d.4g)w :y0*object with the position time graphp z0 0 scsdefg4jg,a):*.uwyc 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 rejhuv/v , 3vpu0qmt,y(fer to the following information. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor uvmqtv ,3p(v,/yu0 j hand 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 t*3vg)gmn f l (/apl0nghe following information. An ideal elastic rubber ball is dropped from a hev) g0g m np3(fglnl/a*ight 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 trm jf+j9n km.;tavel 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 refersg 0lv.ya1mwtn;oz;:u 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 the f4sde* jpo2moj3x3zl s :.gk0oollowing 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 following sceg-zknk, yqlq f:r67 w)nario: 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: ;+:n lb lq)gq8 pxaau x-wjb)5At $t_0$, two cars moving along a highway are side-by-side as they pass a third car stopped on the side of the road. At this moment the driver of the first car steps on the brakes while the driver of the stopped car begins to accelerate. The diagram below show the positions of each car for the next 5 seconds.
If car #3 continues to constantly accelerate at the same rate what will be its position at the end of 6 seconds?


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21#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.33: A small ball rolls down a ramp, across a horizontal table top and off the7 rx/rrx7 o )lad9rkiqg5t2+p table e5r72g7 rtrlp9+qxoa/ki r dx) dge. 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 represents the relationship between distance and time for ubqlrpa ;w + +1xgss)+3)2h, glahypean object that is moving along a straigexuap2+)ap+g,;h srb)3 hy q 1+s glwlht 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 relation gt q68a7,ifp3f c4pweow 8hcd; /v-zmship between distance and time for an object that is moving along a straight line. Between what times did the object have a non-zero a;h4m8fvotf/wc p3 e8w6ic-g7 ,pq adzcceleration?


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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 downwhg(gqe;lb ityv,p9-o2 l*s cm4yb * t+ard on Earth with an initial speed of 12.0 m/s from a position 10.0 m above the ground. Ignoring aigl2ygh tv**,-o b;p(tim +q elyc9s4br 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 f3+7/ cfr t22c reuuxyx6cn 1qarom rest and uniformly accelerating acrqx2 cr3f xu/1 7nce+r6 uyac2toss the floor. The time and distance traveled from the start are shown in the diagram.
What was the average speed of the cart between 0.1 seconds and 0.3 seconds?


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26#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.12: The diagram below represents a toy car starting from rest and unif/dul+ wg7fi6g(e -qolormly accelerating across the floor. The time and distance traveled from t-gl7 e/wo+q 6 gliufd(he 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 fro8iv8*qs7bfo e gcf d 5ldy*8n;m rest and uniformly accelerating across the floor. The time and distance traveled from the star 8yb;eni8f *cdsdv78 *o5 lgfqt 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 uniforml*qkq-nlw.jwizw *) 5o y accelerating ball. The position of the ball each second is indicated. .q5 zw *oqln*-kj) iww
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 position of jju bw50cq*)sbwz) 5j the ballus)j0qj ) wc*wb 5bzj5 each second is 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 line i:y/x3 4xjc n,kxgmo /ks showc4ykg / :ox3jmxx ,n/kn in the 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 wr93y4tmw ny qn6mlwox42 3m*a circus clown on a unicycle moving in a straight line is shown in tw n* 496ywm3wx2lonm4ry3tmq he 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 in a vacuum near the surface of2dbph 0 we/-hv 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 table toa 94htkfxp,g3p for 10h3ptk g4fax9, 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 descrir.4j ovxx,1 4gdyj4rybes the motion of a marble on a table top for 10 seconds. For which time intej4 or,vyjx4 gd1rx.y 4rval(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 h 1 25qo4kk3xv sm-ducon a table top for 10 secvmd5u3ks qx2c4k-h1oonds. What is the marbles average acceleration between t = 3.3 s and t = 3.8 s


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36#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.20: A car accelerates uniformly from rei9q(+*kx /5y) 4syqmyq yw c/nrw:eybst 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 straightwr x.zl/i -vb4z: dtw87ry: mp 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 c a-nq mdbnki1qy/1gyrl-f70a..irv +orrectly represent the motion of an object moving with a constant speed in a straight li.aryg l1arq7-n/q 1.-vfn ybiim+d0kne?


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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 sb(ww.lh vpsd.,rsj9q(c,wp7u h5 +x5mu7fn across the floor for 10 s jsph,7x7l(5sdbcnv, w(+ r 5squwwfpu mh .9.econds. 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 graph describes the motion of a toy car achwuk 2xlwx -m)hz9*c;ross the floor for 10 seconds. What was th2wmkxlcxuh whz * );-9e total 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 tn11rx -+rryutoy car across the floor rt yx+-rr nu11for 10 seconds. At what times or time intervals must the net force on the toy car be zero?


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42#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  16.03: A car accelerates uniformly from 0 km/hr to 60 km/aqgpw4nl. (3(5gp a jh5r:bnmhr in 4.50 s. Which one of the following choices best represents the acceleration of tha .gh5p4q 53bprjnm(: nawl(g e 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 cl/ )jre;8cwf vf,s4o curve shown. Which of the following statement/fcsf, rc4j;wle o )8vs regarding 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 according to the velocity versus t(ivp( t9-r*v ; ftltd /i3 htizg )hfj;,f0vwxime curve shown to the right. When does the gvdtttvxw hi f,l; jz (f3h9 f/iv)ptr*i(-;0car 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 b5,x38xm l dyb k7iao8is moved so that the angle between the velocity and the acce bldam8k7xb8xi oy,53 leration of the ball is kept at a constant 120 degree. Which statement is true about the tennis ball during this interval of time?

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46#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  07.03: Two automobiles are a8wh j7 v/s0n4tml+ qv150 kilometers apart and traveling toward each other.s8v tmj7l/avq n+w4 0h
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-aq.f)ivivs zl76db/ 2ra /*2(oyp o3zeb .zu buxis. When the acceleration is positive and incrlys/2i76uaqzooz.f.* bedprv/b) (3z vb iu2easing

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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 aver( tjdh)d.i ljol d9z29age 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 follow* z v l ,ot,nutf.vv: h-fvh6uv)n:sc7ing choices identifies quantities that must have the67vu.tth ln h::v vc,fvu)f os-v* ,zn 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 lywnp /ax7/mk9:2tg)oj qx)m $3.0\;m$ 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-timexv s w7s2zt,7r, $y\;vs\;t$, 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 topbzzlg f v (h20-li5)c the right along a one-dimensional track for total time T in two)p2clg hv 0b(-lz5if z 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 motc5xs46 wqi- ieion of a car on a straight track is shown in the diagram. The thick line represents tiiwe5 x4cq6 -she 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 a p6i gw/f.e 77eyd9jmwcar on a straight track is shown in the diagram. The thick line mp 67ee wfj gdi./9wy7represents 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 ogf6 0lqq s,dch;0 tld/bject given by the position vs. time graph shown. For what time(s) is the speed of the object greatestlg6d 0q fdsqh/0c;,l t?


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56#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.11: Consider the motion of an object given by theh 85b s9lncif1, tr e;w; mgsqh/s/2er velocity vs. time graph shown. For which time(s) is the accelera/mshhgtqibsew cr5/8ns,;e;f9 r1 2ltion 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 areqjie) ,2fqvvh++uo *c a under the acceleration vs. time graph for a fixed time interval of an object’s motion, what quanti2 jvi+ehuqq*cv)+, ofty 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 horizontal line with increasing speedr0 8;irx8*sh+e vxdzb.
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 thj sph zxf2iktk.u(1n )*3 p6hwo 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 timesv0 v 087bgs2; itwk0nvn-clz 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 rfr;mv)/b tm36: p4 mv tfsm5snest and reaches the ground in a time of $2.50\;s$. Neglect air resistance. From what height above the ground was the object released?

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62#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.17: A position vs. time graph of a particle moving along a horizontal axis ict)x5c o,.9b ajuj) uns shown. What is the total distance traveled by the particle from t=0 to u. bcxuo ,c5)ja t)n9jt=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 idejzwb.q)od x68 - d*ydwntifies all of the listed situations for which there is a no wdd )qwy*8j.x -6zdobn-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. t)l 4sg1)qp 6 qm+v6iy/zihvwtime graph for an object moving along a line is shown. The object statv)zlvihyq q6/sw ) p6igm+ 14rts 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 origin and itsnp vak;jbc*0zt5o.4 ps lg3x+ velocity along a line vs. time is graphed. Which one of the following choices best gives the proper interval(s) of time for which the object is moving 3zkc.t npv+xs0o*gp 5a b;j4 laway from the origin?


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66#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.09: Two cars are moving to the right on a horizontal track, each .mv+;0i9y (/spc wggmkaeiqur/ )ak7 with constant acceleratio/i qu;gwa7i(/rkas e9.kc ymg )v m0p+n. At an instant of 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;l )enko4 m m/*alkhjp8.n-ai 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 time shown in the grnze(w*-5 y, an3p3(-ou b :jj vznxttoaph, which one of the following choices correctly describes the relationship between the average speed of(j axz -:-b3nv5n j(pnu3,wtt eo *ozy 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 th+pggd;o0 gd zp9lz)p xs8;tp +e following choices best describes the instants of time, at which the car and truck travel with the samz+p;)gxz 90 ;ppld 8g +otgpdse 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,g9)elqc h0 3 :*es:mts9 tvcskgb*dp/ each start from rest at the origin and will move along the x-axis. The acceleration vs. time graph for each car is shown. Which one o9sqm t0tb9/*h lv:)sc depkcgge* :3sf 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(zw;rq bb(l /w object moving on a horizontal line is shown. At what time(s) is the/;b(l( bzwwrq 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 e 6,pw7 szjtn +4mu;7wttw:bw the position vs. time graph provided. During what time interval(s) does tusj :;4zw t6wm+tw w,eb 77tpnhe mass have zero acceleration?


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