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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 ce e(ts5 :j 0 bzw/hp,yxkd4l.xonstant 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 disb q pk:xkz6.r,tance per unit time without reference to a particular direction is cal.bqk kr,x :6pzled

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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 +rs2ybdwq+5a5wurk fk w0- c0an average speed of 50 m/s and then completes a second lap at an average w dk c wy+fr0k2a5b5-u0wsq+rspeed 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 move(ffiny hj y3op+h t)bnzn1-)utz47l; s 0.80 m in 1.0 s at the constant velocity. If it continues, how far will it)o)f(y7 hntn3-i bftp y 4uzz+jnlh1; 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 plankibx(4onm)6k ioyx; u4 that is sliding at 5.00 m/s to the right aik4x6xi4 bm( ;o )yonucross 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 vym wit)7fb3( km at 100 km/h. What is the i(w7t3b y mv)faverage 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 travelip+l pnpd0. kqms 3y5m5ng along the x-axis. The graph shown below is a plot of the car’s velocit sm5+dm3p05.ppn qylk y 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 cku:q - jpz6+erefers to the motion of a toy car traveling along the x-axis. The graph shown below is a plot of the c p:cuzq-6 +ejkar’s velocity in the x direction, $v_x$ versus time $t$.What was the acceleration at 33 s?


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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  97.22: This question refers to the motion of a toy car trave.3 6ch mmql1xwling along the x-axis. The graph shown below is a plot of the car’s velocitwlc1qxmh 36m .y 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 ee, 3t yia8m5 zj;*hzu.tex9j; iiy(f flying due south for the winter. At what point did the duck stop its forward emyzu,95 hiytj;j*ifz ee 8 3.a(ti;xmotion?





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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 sh7bqt,m *3i p04zfdnpvows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. What was the average velocity of the car during the thir,mv 0bpf* 4nd 3qz7ptid second?


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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.18: This question refer to the diagram below which shows the posirwgd wnu,; w(1:rzon /tion and elapsed time of a car star u;ndrr wn, w:ozw1(g/ting 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 positehuacy 0m7w ksjz o4dnz.,* /4ion time graph shown in the diagram at rightdyu/ 0e n zo.csk *j,z47aw4mh?


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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 ideal elas ;m(.8whz/ 4;ycxil5xg rrwwm tic rubber ball is dropped from a height of about 2 meters, hits the floor and rebounds to y;zg.5x4/;(mm crl8 iwhw rxw 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 f uxwfv /.r38ws1a9n aiollowing information. An ideal elastic rubber baa3n/suf1v.w9i r w8 xall is dropped from a height of about 2 meters, hits the floor and rebounds to its original height.
Which of the following would best represent acceleration versus time for the bouncing ball?


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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  00.39: If a boat can travel wit ,gzfg*t dxr/;4 c:-v jbg.ccth 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 following scenari) .jeq,h6 h hf2mu,wxmo: 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 sce9pax0xr,mbva2: )j stx5rb( 59 xt tjmnario: 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 fok9wp*fn( e l2a4uoi/sllowing 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 refu)v (e9,t sesb gb+7kwers 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.
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 tablek .c-9a;5cie t.4 tv+szqqi pgwx /:qd top and off the table edge. Which of the following wout.qpe4k+x ;/- vqd5zwq 9ti. a:igcc sld 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 relati *j:0enql* sbbonship between distance and time for an object that is moving along a straight line. What is the instantaneous speed of the l 0je*bbnq:*sobject 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 relationshtk-1t + 5dcdkhm ruufy/u *18 uele/u1ip between distance and time for an object that is moving along a straight line. Between what times did the object have a non-zero accelyuuemu-fdl ct8uhde*/1 t +/ur kk115eration?


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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 t/g8g.4s vu arthrown straight downward on Earth with an initial speed of 12.0 m/s frot/ar 4 u.g8gvsm a position 10.0 m above the ground. Ignoring air resistance, the speed of the object when it reaches the ground is

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25#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.11: The diagram below represents a toy car startino +vj;wf4yhh ewc2/ if824wrc g from rest and uniformly accelerating across the floor. The time and distance traveled from the start are shc/ ofw4w v hh4r+2fcyew8i2j ;own 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 uniformlv +u*rizar8.l 2l5)y*q ebx-q r0j jlcy accelerating across the floor. The time and distance traveled from the start are shown in the diylai2x ej lu lr8r0cq b +jzr.q)*5-*vagram.
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 reitz9 wgglxbz/1uc7 n 08c6 *hkpresents a toy car starting from rest and uniformly accelerating across the floor. The time and distance traveled from the start are shohnz7cxcg twb980/ ulgz*6 1i kwn 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 the7 u2tbwih36cj qnwz )+ ball each sez+w qiw2jt h7u)bn36 ccond 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 29opij sj ;zy6a uniformly accelerating ball. The position of the ball each sesp6oi;jj y29z cond 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 mov(qloj8sei pv7v * nsw cr.;;h,(ramv4ing in a straight line is shown in the grapcss(w4moijnva; p v ( hl*r.7,erv; q8h 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 unicy.obpurz8:oj b j/sjefu)) vd57(mmu ; y1:fg tcle moving in a straight line is shown i fom) b;g5vf1b(u8u.osr :p umdt/z 7jyj j:e)n 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 the surface of the earw lmb9dn24q1zxaea / 3th

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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 motioxt5u(yy 9podil (: g) eqwx0w7n of a marble on a table top for o57y)u (0xy(pdwqx9it le: gw10 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 describes the motion of a marble on a table top jq x4g xtyv.t. dibx14hk0/j;for 10 seconds. For which timejttvq0hy/ . xx.gx ;jb1d4 ik4 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 describes the ,ka1vvu2l 5o vmotion of a marble on a table top for 10 secvkov v2 a5u,l1onds. 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 fromcm;a (b *v9- n8jcero srnknf/ 7ap/g/ rest for a time of $2.00\;s$ through a distance of $4.00\;m$. What was the acceleration of the car?

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37#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  16.06: An object, thrown straight downward with a sp;*3pzxp9b npo 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 reprez+ti6 jmj*o*wk)mf-lukz7 a1sent the motion of an object moving with a constant speed in a straight line? wmm6*j)ftak oziz*1ulj+ k -7


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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 dzfm4syd u6u9-w50b yuescribes the motion of a toy car across the floor for 10 seconds. What is the acceleration of the to6zs4y 0fu w5buuy9d-m y 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 the flohr zal ;b8mpxq(r.fpp-eku ( .bne.5(or for 10 seconds. What was the total displacement of the toy car for the entire 10 seconp b 8er(pmupb(z5 lhen;-x.(.rqf ak. d 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 motiolsea7ks*t.h yblgrh+b(m q:. 6/)l tz n of a toy car across the floor for 10 seconds. At what times or time intervals must thlbz lrq.hts(a7l/. m+ t6heb)gys:*ke 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 60f kkre5.vy 5v;,qobv6 km/hr in 4.50 s. Which one of the following choices best represents the be5kvo fv,y kv;.r5q6 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 velocitwv c*9uxwc1rbk7ho *a;u y0k9 y versus time curve shown. Which of the following statements regarding its motion is N xh ;1y kk7bar0wcv*9cou9 wu*OT 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 v o ,4e,cvk 3k;dd7wybthe velocity versus time curve shown to the right. When does the cacw7,v3yk4 b;ddkv o,er 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 t 9f)e vbm*t-l) p 47ogp0genpbhat the angle between the velocity and the acceleration of the ball is kept at a constant 120 degree. Which statement is 4 9)7vt) -pbnmf el*0ppg gboetrue about the tennis ball during this interval of time?

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46#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  07.03: Two automobiles are 150 kilometers apart and traveling toward each othulq ;yeln r82otd:+ b,er.+ :leb tdlr8noyuq2;,
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. When1x.mh( yc5/ybqqe5nd the acceleration is positive and increashq d/.eyn55yqx mb1 c(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 apvyfj3(ie +3 g4s(ui( 2 oioegverage 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 thji tjp)as .21h jqb1vku/,p8 te following choices identifies quantities that must have the same dirpp jks1a/ tbuh8t2qj),vi . 1jection?

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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 movc.mliv+u(d+ wd uc 4m)es $3.0\;m$ 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-ts c/rfs6 fni *yzl:60yvr5by7ime, $y\;vs\;t$, 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 alouju/edo :,a)8 lc9ce,8yt wclng a one-dimensional track for total time T in alu 8:te9lj,wc8 /,)ccdoeyu 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 graph for oa 9a;cao)of8the motion of a car on a straight track is shown in the diagram. The thick line represents the velocity. Assume oo;98fc o)aaathat 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 grau 1s 44euu,lcewet4ab n:l l205ly2ci 5gd c:jph for the motion of a car on a straight track is shown in the diagram. The thick line represents the veloceb4yt15 2w 0le cg: ,ju52laluesclui4nc4:d ity. 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. time g3d wrva 8rx;r(raph shown. For what time(s) is the spe ;drw3(rvxar8ed of the object greatest?


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56#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.11: Consider the gz -8a6r:jg gtmotion of an object given by the velocity vs. time graph shown. For whrg-: ga ztg8j6ich 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 uik l/msj/x3+gl*mq6 1ld7psmnder the acceleration vs. time graph for a fixed time interval of an object’s motion, what quantity has been determined for that objecs3m il/6 ps*gmqx l/7jd+mk1lt?

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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 wi0vt0t5aumyb6 0df4rxmq ra3 -th 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 tript 7;x;.n4mal mgww4mc.gc u l: in two 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 releaw1s 7):g ww.lqznn3ndsed 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 from rest and reaches the grouk8 tp;p,eqkxjk.f( j8-l6sp z nd 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 vsu3ni) b0m)u.bfq y;1/a xfhnt.o ndc8. time graph of a particle moving along a horizontal axis is shown. What i.m.co0/8tuynx f andu1nf h )bi)q3; bs 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 9- fzv j*s:opy:(cctfhr(fdix 9ki 3) of the listed situations for which therei y(ch:9 j r(v)-d:*xfzp9istf3 c kfo 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 graph9 kw1fg5xb/3 q fejq2t for an object moving along a line is shown. The object starts from rest at time t=0 s. At what time(s) does the object attain a q25fqkx e jbw9tfg3/ 1maximum 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 bj75/kr jl.vuand its 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 i jjb .lu/7v5rks 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 const m8p(+:b,wfcpzevsi ,6aikw1 ant accelef(mv sz pe,6wk c1bi8,:+api wration. 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 a posit:9. xhj:rw 1n7nfxhi3,3vuz;jx pr wk ion $x$, 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 g9zdfu;/u sm:ga4xjoo v20-g oraph, which one of the following choices correctly describes the relationship between the average speed of the truck -zo 2:xu;vod0ma/usfjog9 4gto 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 bescl( 4.-g9v5)cc7psym ibprnrt describes the instants of time, at which the car and truck travel with the sampm.) 4s(i ln9 ybr -gcrc57pcve 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 origin6f:5bwjr0 :fyg 1s dci 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 the speeds f:0j dg651 b yrcfi:ws$v$ 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 horizon djnq)m8i8vw3 g0.vp atal line is shown. At what time(s) is the on8 gidvv8pw 03 .)mqjabject 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 followin r0wxf6;axc s-g the position vs. time graph provided. During what time interval(s) does the mass have z -0xr x6f;acswero acceleration?


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