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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 cx9kpt h. n,s7 4b4bkuoonstant 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/;9n ud,i/c;y+ v kbtysy gdazw2t2l; particular direct/d y9yut wiykb2n/gtca2lv;,;+; dzs ion 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 cjsh3 uuzte,,mfs )t27ircular track at an average speed of 50 m/s and then completes a second lap a)ttzu2h s,m7 3ufjs,et an average speed of $V$. The average speed of the vehicle for the completion of both laps was 80 m/s. What was the average speed $V$ of the second lap?

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  95.03: A toy car moves 0.80 m in 1.0 s at the constant velocity. If it contincq(owbtlv.m 64d,3l/ y cofp*ues, how far vt3y4owlcmc6,f * (l./obqdp will it travel in 3.0 s?

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5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  05.34: A 40-kg boy is stationary on a 30-kg plank that is sliding at 5.00 mr:dxr,n 3n /nuw/,h tx/s to the right across r// :tnwdx urx3n,nh,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 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.4fxfm6 hb(n48 -t9zdd0kbccg What is the avebdmnc 8zgxh b t9f0f6-k44(dc rage 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 x-axzu50, ersat8iv+n- ssz-3kmyhh5 1neis. The graz50v nne --e3+, ms iu8k1ysstzhh5raph shown 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 motion h 8ds:tof1z7 nof a toy car traveling along the x-axis. The graph shown below is a plot of the caft1hn z7d8:osr’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 morv w *oz3;ah*gsmll 6)+di yd*tion of a toy car traveling along the x-axis. The graph shown below is a plot of the car’s velocity in the x directiz3;dllwm 6r i)a+* *s*dygo hvon, $v_x$ 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 lqcmac w3*gd)99:a fl of the velocity vs. time of a duck flying due south for the winter. At what point did the duckdl 3caf9*m:qagw)9c 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 to the diagram below which shows the posii. lpb- l)emy9tion and elapsed time of a car starting from rest l.pm) iebl9y-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 dherf,: gfqm3;, a2of .j7wi:in2dyfs iagram below which shows the position and elapsed time of a ri ;y o f2mfwf.sg3 ,nheq,aifj:7 :d2car 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 object with the 9z:a:yj .l;zt iyrdq ah,1.yqposition time graph shown in the ., a;drz9 y: :zyy1ah.qtjlqi 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 information. An iesf uo ;70e)j/u8fngkk4jnd1 deal elastin 10gdjso4k )f ;n/e7jufuek 8c rubber ball is dropped 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*dq co)o90czk;u93mjqdxi z( following information. An ideal elastic rubber ball is dropped from a h m( uoc*;d)id zkxz 9c903jqqoeight 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 tray / :m/o)u/ai6k qvpetvel 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 followin8kiqd zw,g- +qg 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 following s nau,a01 y /i.(fqgkuxpx)vt/cenario: 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 th r74gc 8qhvhc gh30qklf1*u6q e 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 scen4w54m bzdd j8/f*kv xu6q 1ermario: 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 horizontal table ,e nn66yerarna/ p ek)i0p,:c top and off the tablyke/:0p6en)nra6,i ane cp, re edge. 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 repre oplnezh1k-2aq ,vm *:sents the relationship between distance and time for an object that is moving al v-o 2amh *n,epk1:zqlong a straight line. What is the instantaneous speed of the object at t = 5.0 seconds?


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23#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.02: The graph represents the relationship between distance a-+gcd m s jbj ,uh.sjk5.hh)v1zsq,o)nd time for an object that is movsj.h qhb dg)sm, -)suh5c jkz vo.1,j+ing along 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 thrown straight downward on Earth with an init51sxo8rw(t /lbk h0m*juh 2m oqj0nf -ial speed of 12.0 m/s from a position 10.0 m above the ground. Ignoring air resistance-nboq /2usmhl1xmk(0tjfo0jh w8 r*5 , 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 c pe-8uww6u )capqu3zz m0o *3bar starting from rest and uniformly accelerating across the floor. The time and distance traveled from the start are shown in the diagra ewm-zob33c zpuuapu8) q6*w0m.
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 startqwa, a4, b/gn;8nm-*s9bc p yektdkpyn5 4r)ning from rest and uniformly acceleran wkmebnra8*,aps -) 54gqn ;cy4y/n ,9bptkdting 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 startin.4p-m uvt, x ihz1q4tvo*y:d ,x:cerr g from rest and uniformly accelerating across the floor. The time i,r* .-zu: rdvo4,q4c m: e xtthvp1xyand 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 sh) khm/axby624 64owfkg dc+peows a uniformly accelerating ball. The position of the ball each sec2 )ew6yc dogk +/6bxfkmpah44ond 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 acceleratingbh(8 cr4v w-za ball. The position of the ball each second is indic c-(z4hbwv8arated.
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 unicycd2mmuurc 5y0ao9xcyy t6 ,zq6 0(gh9zle moving in a straight line is somg0zc9u9yr0czq2tx 65h( m a 6yd ,yuhown 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 a circus clownjw-9,9 xpf fcs on a unicycle moving in a straight line is shown in,c9j-9fs fwp x 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 in a vacuum near omg:l -8pxojx-2oe-j 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 mcrb91f 7 a,5(yrh,klzm e dz(od0ro5j( tgl3table top for 10 seconds. For which timh rzkfjald1z e7m g0r9(om ryot((, 3b5c l,d5e 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 de d)ue :hqe13t6c6g aofscribes the motion of a marble on a table top for 10 se u1g:f)3htoe6 e6 qcadconds. For which time interval(s) did the marble have a positive acceleration?


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35#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.13: The accompanying graph y 3 mbv6rx9jo(3:cxyvw3 -nxq axa2r6describes the motion of a marble on a table top for 10 seconds.3: x wy36-q(x rnm9cyjb2 vxr3 axa6vo 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 rest for a tx 8/09e p rqm3unew*pqe5*brcime 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 speed of x7 (oa ja qt*bjv;td4+$20.0\;m/s$, 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 correc ;t n37ddx0didtly represent the motion of an object moving with a co 7xnd;3dddi0t nstant 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 describes m mti:tc 7*l8fcm t7m2the motion of a toy car across the floor for 10 seconds. What is the a* 7t7:il8mfmc m 2ttmccceleration 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 thx:q c4jcd+ nawbboc(s 4wh+i6 5w3v wqn0fq;/e motion of a toy car across the floor for 10 seconds. What was the total displacement of the toy car for the entire 10 second interval shown?/wsjdvnq0: bbch4; fwn+3qcq4 w+5xi 6ao(cw


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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 toy car acrj z o; j;i2jmh,jl6cggw8+8tgoss the floor for 10 seconds. At what times or time intervals must the net force on the toy car be + 86 j 2ijl;tjhw,mzoggj;c8gzero?


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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.nz w5m,a6+nr vm7 d2akl3zze uniformly from 0 km/hr to 60 km/hr in 4.50 s. Which one of the following choices best represents the acceleration of the z62 7,zm n.av3n+ wm ka5lerzdcar?

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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 following sfkh (58 neec3 wop0kb*tatements regarding its motion is NOT CORRECT? k*(0kb opehew 3cf8n5


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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 th.uxy5 2jgv2 eg /rny.ve x-axis according to the velocity versus time curve shown to the right. When does the car have zero acceleratigvy5. rnxe.v2jy /g 2uon?


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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 tat:1niv bs4oq3 7 qo)bime, a tennis ball is moved so that the angle between the velocity and the acceleration of the ball is kept at a constant 120 degree. Which statement is true abos :4b 3o)qtobn 71qivaut 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 kilo*al 70 o(lr gll 3-gy8vls8yjtmeters apart and traveling toward each other.g- lrl3yl so 8v0atj*y( g78ll
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 ayk/nb0 o,gn :l e0p-uh/zv.d und increasingb:yk/.0 0ehn d-,zvgnpuluo /

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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 averd);ea3 w4sx5m yvyo;gage 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 o,cg b758fr simhn.xq4 j d)d*mf the following choices identifies quantitid7)bsmi84, xr5.mqjgcfdh* n es that must have the same direction?

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50#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  09.17: A toy car moves z8 lb- bku,1irr, d)rl$3.0\;m$ 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-t) 3 +mftn6l;kubyx ax2ime, $y\;vs\;t$, 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-dimen 9j4s.vul*c mqsional track for total time T in two part9sl*.4 uqc jmvs.
• 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 motion of a car on a st0odjvsdl3tov;p x ;- arbs(05 raight track is shown in the diagram. The thick0pab0xjdvo-3;vl 5r ;s (sod t line represents the velocity. Assume that the car starts at origin $x=0$. At which time is the car the greatest distance from the origin?


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54#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  08.24: The velocity vs. time graph for the motion of a car on a d ira 9+*4a3s4(q /o:bhmjhdadusy:a straight track is shown in the d dyq4assr *had+hm au:a/ 9 :dj3iob4(iagram. 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 givew63mfsp*43 c2top7j d 2u vwcl4: mpvyn by the position vs. time graph shown. For what time(s) is the speed of the object greate62p3yd wp * sl7vw2c4pmjm:o4cv tf u3st?


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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 the veloci1oz+-+aq kukh +ov (fqty vs. time graph shown. Forvkz qa-(+oh+koq1+uf which time(s) is the acceleration 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 t bf:;rbmb13k acceleration vs. time graph for a fixed time interval of an object’s mot :b bb;1fk3trmion, 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 horizontal line with incre6+4 yw0f .n glo.ibmkzasing 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 partgd.;yb,hdlz+,seo 2l s:
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-/vb rvhs9 h7m is released from 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 fr2rzrz2) 0 f- 5( y9pxzyw7rpas+sxhzmom rest 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 horizontalt o8 o dwx(pa7hd3v9u8 4 ;cr.p4chtlk axis is shown. What is the total distance traveled by the partic o9(t8h 3acrvk 8 4;dhplduc t7.wox4ple 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 followingt7sn9 : cs tz,vt6e6cm choices correctly identifies all of the listed situations for which there itm97 6c ,vs:nztcts6e s 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 moving along ,scy2o1 aqyw5 ;1emocd va)n/h3q8oda line is shown. The object starts from rest at time t=0 s. At what time(s) does the object attain a maximum displacement from its startin)1wdqa;qs ony35e/ d8 ,mvc ho c1oy2ag 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 sta yn9yao6)4+c9gq ci pr4 ;fdtwrts at the origin and its velocity along a line vs. time is graphed. Which one of the following choices best gives the proper interval(s) of g;qodf4y6)p +ciyr 9a49 wtcntime 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 a horizontal track, each with constakur bztcp(ij7bu/b0ld4 9 .s9nt acceleration. At an instant of time, the information about the cars is showbc. dp4lb/ 9j(sbt iz9ur70 kun:
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 p,p8, wzw2pfdqxgv62qoo8o *ypd (ngl5ud.m 1 osition $x$, as a function of time $t$, given as $x(t) = -15 - 25t + 10t^2$. Which one of the following choices represents the magnitude of the particle’s acceleration? All quantities are expressed in base SI units.

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68#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.41: For the entire time shown in the graph, which one of the following chrpo wi6,/d8a0 gr ;,qrsgdz l4oices correctly describes the relationship between the average speed of the truck t8 gag l/iq6z d p0orsr,;r4,dwo 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 instake3zhd ucp,oygip3c r(* 9(+ rnts of time, at which the car and truck erpc kuy9gh3i + d(op z(rc*,3travel 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, ez5fq x-;1*c/iqdv rjglc2i5l ach 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 of the following choices correctly identifies the relationship for both the5xfl zqcql* ; r1ij5i-cg/vd2 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. tiu,as 99iij:q *efsh w*me graph of an object moving on a horizontal line is shown. At what tijufs w h*sqa9* iei,:9me(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 th ++sh vgtv 3rm13-qcpqe position vs. time graph provided. During what time interval(s) does the mass have zero accelerati+p3q+t3g c-vv qrmhs 1on?


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总分:72分 及格:43.2分 时间:不限时
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当前第 题,此次习题练习共有 72 道题

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