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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 travels at a constant sasuug5j fj17bx2a,cfjz7f4 ;6 0qrfl peed 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 particul b.g2t3rhkh2d ar direction ishkh2bg3t 2 rd. 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 a1eo/n.u7kx 6y/x4 p kszdpsu6o(zo 99s;k s ny circular track at an average speed of 50 m/s ap o 99n.xyxy66ssspz(u4 1k k/nzd u/e;sok7ond then completes a second lap 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 lu n p+p-l8/afat the constant velocity. If it continuesp lunf a/pl+-8, how far 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 statiojkn *.h)uiz l3nary on a 30-kg plank that is sliding at 5.00 m/s to the right across a fric*z) kui3njlh. tionless 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. What;jk. z u9qxkw1 is the average speed of tuk;1 qwx.zk9jhe 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 travelini:8duc( wxjtdt9m fst nd5 ++ mc-(:fag along the x-axis. The graph shown below is a plot of the car’s velocity in+9jd8mt+i(d::5 na(f x m cf-ut sdwtc the x direction, $v_x$ versus time $t$.
During what time interval was the car moving towards its initial position at constant velocity?


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8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  97.21: This question refers to the motion of a toy car-f4o i lku 9ax3 tck.py183hyh traveling along the x-axis. The graph shown below is a plot of the car’s velf p 3 83aoc.9t1lkhhxy4-ykuiocity 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 ddd/1gao h4a03vy0q orefers to the motion of a toy car traveling along the x-axis. The graph shown below is a plot of the car’s velocity in the dyogh300 daq/4o1avd x direction, $v_x$ versus time $t$.
How far did the car travel during the first 15 seconds?


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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.15: Given the graph of the velocity vs. time of a duck flying due south fr)g 20xjcoxnvfdr (6,or the winter. At wgo 6r , 2ncj)x0drxfv(hat point did the duck 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 positionn6e n4h1 8 i0gk vf.fajw* yoyb1ce:d/ and elapsed time of a car starting from rest and uniformly accelerating in k*fce1 ghjb/:ayv 1wfdy e.n4no 8i60a 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 below which shows the position and slav 41y;jk, 9i:nyadl7 hwq5q ,qf:selapsed time of a car starting from rest and uniformly accelerating in a straight line. The average acceleration during the entire 3 second interval is closesthsaw, ;:f4 ly,57 v:9ysidjkqan1lq q 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 velocitye6b1+*typk adp/6.;s g reppdsvzy-7 time graph for an object with the position time graph shown in the diagram at right? pps.y*pv d- gt bs +616/kpeey r;7zad


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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 td- , 3 bb4ilmvy/abih(o the following information. An ideal elastic rubber ball is dropped from a height of about 2 mete /h -,ai(ly34dibv bbmrs, hits the floor and rebounds to its original height.
Which of the following graphs would best represent the distance above the floor versus time for the above bouncing ball?


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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  00.29: The following question refer to the following in 4+lorz(gsm 0j/ krnj.wuf 5l+formation. An ideal elastic rubber ball is dropped from a height of about 2 meters, hinl.mo gr+rf s5kul/0j( zj+4 wts 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 trcc,w05c,(gx. aihnj javel 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 following scenario: At vlp)0;x( 0z edlek 80aapk4qx$t_0$, 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 followi0k5we :a ddo y50fwomfu690yjng 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 refere*d6/cgj -wzi s 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.
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 folly0x6 jmjcjgp 8eeyxc-g69 w9uf:d) *iowing 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 t.f oq;xpw;d 4jable top and off the tabd.f4o q; wxjp;le 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 represents the relation)cx/xi rv4j8b ship between distance and time for an object that is moving along a straight line. What is the instantaneous speed of the ob) i84vr /xjxcbject 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 and time for an okl 5f6dw3rorw35 v *ycrtm12zbject that is moving along df5k52c3 zyl* 6o1mwrr3vr wta 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 downwardw-2u5 sdh hj1c on Earth with an initial speed of 12.0 m/s from a position 10.0 m above the ground. Ignoring air resistance, the speed of the obj2 -h5dcjhu ws1ect 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 repreyx wc b84a8vwuuze3(/sents a toy car starting from rest and uniformly accelerating across the floor. The time and distance traveled from tw u3yaz (8xc48buw/vehe 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 d+4oyge+ak*)jc f qc, :x;kpv represents a toy car starting from rest and uniformly accelerating across the floor. The ticf*:4kjdc p;g) koq v+x,ya+eme and distance traveled from the start are shown in the diagram.
What was the acceleration of the cart during the first 0.4 seconds?


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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.13: The diagram below represents a toy car starting from rest and ub/ 1 wff)*e; zhl j4j+j-qaagh b.pgpa5)vwy5niformly accelerating across the4vw)/j5b*-gpa ahg5 1w fqfbel.)hpj+yz ;ja floor. The time and distance traveled from the start are shown in the diagram.
What was the instantaneous velocity of the cart at 96 centimeters from the start?


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28#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  04.08: The diagram shows a uniformly accelerating;5ogt sb;j;kz3 6j ukz ball. The position of the ball each second is i3bu;j;;zgj zs5tkko6ndicated.
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 8zwk)9t r.s 5*uzulbji 7c( wqaccelerating ball. The position of the ball each sec w*ciu9k7zwsul85 zrq.b( j)t ond 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 circ xgmemn,279 g)bz /np:wqkiq *us clown on a unicycle moving in a straight line is shown in the graph below. x : w 7mq/pgnziq),*2 ekg9nbm
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 str: gso4so:x :aeaight line is shown in the grapoa4s:go:ex s: h 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 ea d4c,f;az.ku,9homb hrth

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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 ofph )lof0ge(3 goeaeqcf) s- aq*f3m;7 a marble on a table top for 10 seconds. For which time interval(s) did the marb sqf3(qh3me 7a)a0gpf f eg;olo e*-c)le 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 my/kl(s s.ji:hyk ,+rl i lz5,qarble on a table top for 10 seconds. For which time interkihsyly5.l , rj:/+ls(i z qk,val(s) did the marble have a positive acceleration?


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35#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.13: The accompanying graph describes the motion of a marble on a c/,57w ,t x1 pe(bptnwdkgem3m tb2-stable top for 10 seconds. What is the marbles average acceleration between t = 2 g(wtpcd 5bbx13- swpn7et e /km,tm,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 te jo ru;2mhsv(5 v7cl4ime 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 spel9j9d ptdu9rf/t bpeh0c8;, t ed 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 d(x9o4 (l laepmz4v*n represent the motion of an object moving with a e4xnzav o 4l* lm((9pdconstant 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 the motion of a toy car a9fyl 86kgkgfagw1s , j0eah,9cross the floor for 10 seconds. What is the acceleration of the toy car at t = 4 swa, k ly,0segj fggkah19986f?


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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 describesnsp6pj v20e4u the motion of a toy car across the floor for 10 seconds. What was the total displacemen v246upp ej0snt 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 toy car across the floor/4b.ct0sot/ kgb-(mijzf5 mt for 10 seconds. At what times or time intervals must the net force on the toy car b-itmzokgsj 45 c/ tbf.t( 0/bme zero?


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42#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  16.03: A car accelerates uniformly from 0 km/hr to 60 km/hr+eu-;hpd+yum mi(;m j in 4.50 s. Which one of the following em(m-u+dihmp+ uy;j; choices best represents the acceleration of the car?

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43#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  06.07: A car has the velocity versus ti)s1 jh( t6i2: zp jpl+;bq+rubugf.nkme curve shown. Which of the following statements rerb 6(f zl. nqp2tujk+:ji up)gs;+ 1bhgarding 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 t8nkmo0m- o.burux75 r he x-axis according to the velocity versus time curve shown to the right. When doesux05kmmrn8r -o7uob . 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 tuacmh b+;k4td;zvt x .k6-n:oennis 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 about the tennis ball during this interkb4uto.hm+t ; c6xk v-azn;d: val 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 kilometerv(me8 (mm/ cjrs apart and traveling toward each other.mm ve/jrc(m (8
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 ex1 fy.o fxc(.the acceleration is positive and incre1 .y(cfe.x fxoasing

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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 average velocity i 3 b 1m:g3jmrqd1pkaxhdhl. 3-s

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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 dimensio5i/8ap dz)fhtxa )kxd9sp*a 3ns, which one of the following choices identifies quantities that must have the sams)pa8 dk xpaf/xd 5)9i*za3the 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 movevpl4r3zg ba,om/3+3lnhutn 8s $3.0\;m$ 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-time81i) ljsw* itlyy)c ;f, $y\;vs\;t$, 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 al fgp*t j8fmc 2h(7.q-a p*ctsoong a one-dimensional track for total time T in f 8q*2ahgc.t csomfjp (7-pt* 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 the motig2x(n-te bf: lon of a car on a straight track is shown in the diagram. The thick line represents the veloc xetgbfl-(n: 2ity. 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 opu; ghnp. o z 3s2c,hfez(fs1-f a car on a straight track is shown in the diagram. The thick line represents the velocityus ofc p2n, hpfh3e;1z.g(s- z. 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 m19rs-78aw kg3q jg3(6 (agmcleet 7y uhpq )ilotion of an object given by the position vs. time graph shown. For what time(qmgpl3hjsw7aegik- c7g1 l6 y(9r83aq e ( )uts) is the speed 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 motion of an object giveh 8 m7hoo sre)8uf64rjn by the velocity vs. time graph shown. For which time(s) is the acceleration of the object f8jr7o86hr) em 4suo hequal 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 thev tu4a8kp) f(y acceleration vs. time graph for a fixed time interval of an object’s motion, what quy(vau4 k 8pft)antity 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 increastbn)zq zgki/rjdn *n h/()4 -iing 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 pffp ,cjpb8t d1a3b r0m. zs4u;arts:
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 r0b/u:t4icj 5j 0/yimlzc 8mdg est 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 u9x,)yxaxyp4 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 axiryfraom6r3*tyi 8z yrs pq*s y+ y jo;0b,94w0s is shown. What is the total distance traveled by the particle from t=0 to t=m 4zyit0 r,;as*o9wb* y 0y8 oqjsrf3r+py6ry10s ?


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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 the lisl3drn5j 7js14 m ;wtj5*s- d cubeir/wted situations for which there is a 5;4wen irsumd7j1tsb5/3 jw d*j-l cr 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 a4w3w- 7zws adryl+6wilong a line is shown. The object starts from rest-sw4 ldaiww y 7wr36+z at time t=0 s. At what time(s) does the object attain a maximum displacement from its starting position?


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65#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.17: An object starts at the origin and its velocity along a line :o,:bm ebxu ;wvs. time is graphed. Which one of the following choices best gives the proper inte;xmbbuw ,::oerval(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 movin q d1+e o(v 7svd3m +:y1kf*krdlltr(ug to the right on a horizontal track, each with constant accelerolvd (u:7fkr*yq+1k+ lev rdtmd13 (sation. 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 posp:/:eh yu okw8kqax7(h6 *z iyition $x$, 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 shosxyu )( 0fw-fc c l 5a.hl+c)rddq.;wxwn in the graph, which one of the following choices correctly describes the relationship between the average speed of the truck to that of the lquwr;ac x)d5fl +.c. 0dcxy- )f(s whcar?


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69#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.42: Which one of the following choices best describes the instants of time, axx;ciee (- 8qrt which thei;-c 8e(rxeq x 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 f 5ij4,prb uex:rom 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 relepi 4:b j5xru,ationship for both the speeds $v$ and the positions $x$ of the cars at time T?


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71#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  16.02: The position vs. time graph of an object moving on aljaa7/x.s+k8t +j r6lq7ole /psge ;s horizontal line is shown. At what time(s) is the object moving .sg/ s+aqaej6p78j/; x+ letos llr 7kwith 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 the position vs. time fz7yiga80x7me78di;i 2nc/hb7)nurp tf+cn graph provided. During what time interval(s) does the mass have cde88)7mnp ;nb7 7hinar7i 0fyf+2uzxc i/tg zero acceleration?


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