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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 trakiz1 soo w7q*d7r05cpn,xka0ti-l i. vels at a constant speed around a circular path of radius $R$, if the particle makes one complete trip around the entire circle, what is the magnitude of the displacement for this trip?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.01: The change of distance per unit time8rk5lj x*our7e,iny+ without reference to a particular direction is call7, lir+jen8k5u r yx*oed

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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 a uh2):2b(iku7ufq ( og. scd yw)ilwf3n average speed of 50 m/s and then completes a second la 7)32qf.iwg( u f(wbyhiu) s 2oduclk:p 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 velocity. If it conti,l5gn eh 7)iyonues, how far wi i)nl5ogy7,eh ll 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 t:rp4hi8 vc.-jycdtn1- vz:jh3 ku, vq hat is sliding at 5.00 m/s to the right across a frictionless pond. The boy then turns vyr vzjk hnqv-chip:c:834 ,.tdu1j- 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:q :q;:87eijhvk :ksa pe.g *,dbvuix. What is the average speed of the motorist on this ekkhb:svi p8d *eqvu gi:j;aqx7: .:, 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 t7zvst ovjezrvz3: t-495 rzb(oy car traveling along the x-axis. The graph shown below is a plrt 3strv-e( 9zzv:b7zjvz4 o 5ot 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 tyq+c+k)mn d-ay 2ml: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 x directionac)qtmyd :nlky + m+2-, $v_x$ 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 f/ 8 0rr0jgtlsl u:i(ucar traveling along the x-axis. The graph shown below is s juu l:0/lrf(gr t8i0a plot of the car’s velocity 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+ j het+4dv*k)by hg9g vs. time of a duck flying due south for the winter. At what point did the duck s9+djgty4vb+ ek*hh g)top 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 bejyxa4,q +wog6low which shows 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,jy x+ogq4aw 6 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 am g6j( shnnbqz14e2c( nd elapsed time of a car starting from rest and uniformly accelerating in a straight line. The average acceleration during the entire 3 second intervae( s4cb j1h(qn6 nm2zgl 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 grapaj.ev;ynf7x8r yr;i 3h for an object with the position time graph shown in the diagram at riv;e8rr7 na . jfyi;y3xght?


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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 questionkxo7j 48s-s2 csn psp1 refer to the following information. An ideal elastic rubber ball is dropped from a heig ss2s j8xo41nppks-7 cht 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 following information. An ideal elastnl-/+kv *uo dae+in)jqje5 j7ic rubber ball is dropped from a height of about 2 meters, hits the floor and rebounds to its original height. /5kno)janj+-uv*7dj+ ie q le
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 travelr j* u:*dpb)ow 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 scenariwx 99)1 ufyv1:z udvaco: 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 rh b 29hzzaxy-i*91 * v:lpdkpbkmv+0cenario: 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 scenario: At+wxgvk x+ tg*; $t_0$, 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 s3px*7f2k ivns (jso2 s:*vvt ocenario: 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 horizo aw112jk pb.nu4q/m ckntal table top and off the table edge. Which of the b cpw.an u1k1q42 kj/mfollowing 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 bej.od gi7( njg.,3gy xktween distance and time for an object that is moving along a straight line. What is the y( 7j, o.knd jg.i3ggxinstantaneous 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 and tnl pm er/ 78vx/7i/rhkime for an object that is moving along a st/vk p7r em8xhl7nri //raight 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 throwv7wne44k) tu jn straight downward on Earth with an initial speed of 12.0 m/s from a position 10.0 m above the ground. Ignoring air resistance, the speed of the object when it reaches thenuwe4tv 7)k4 j 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 s;jnp 0i o.nai jp(i:3atarting from rest and uniformly accelerating across the floor. The time and distance traveled from the start are shown in tia.3oi;pn:ijjan (0p he 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 rp s,c(,thh1)eq)wtoormly accelerating across the floor. The time and distance traveled from the start are, (por1w)sq ,tt hch)e 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 startingc -k. yvwp:a9*kjeh4lyt73bo from rest and uniformly accelerating across the floor. The time and distanc.jb -cv9*34o:pa hkl7wk y ytee 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 9 *yj, vdl9t- vkg,1m5vnzu6zgd8xd gaccelerating ball. The position of the ball each g91vkggxd d-u,nv9,j vzmzd 6*l 5t8y second is indicated.
What is the average speed of the ball between 3 and 4 seconds?


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29#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  04.09: The diagram shows a uniformly accelerating ball. vdcihi)ug3 h 58q;zg +,1ctur The position of the ball each secvu3cc5rdg ihqtzg;8 i1,hu+) 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 circus clown on a unicycle moving in a straight lm*5lrur s0ijm- -(/n4 oa 0jkaefwg:bine is shown in the grap0(m oju5n4kga-ral rm:bjie*- wf0/sh 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 clowe znuj8xm5s i7y y 8r+r9(ac3yn on a unicycle moving in a straight line is shown in the graph bera(3r9e+xy5n8mis8 j zu 7cyy low.
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 d nii-6pd w/:alw/l7sub ,ep* vmsy(/near the surface of the earth

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33#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.11: The accompanying graph describes tjje h7arm5qnd50i7 w1vbdw.0he motion of a marble on a table top for 10 secondvqabw0de 7. h 5 m70ji5rnw1djs. 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 dvs;+iyvr4g 8 motion of a marble on a table top for 10 seconds. For which time iv8d4yrs ig+v ;nterval(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 table4 uz0b 0yz.xfo top for 10 seconds. What is t0bu.0yfz 4xo zhe 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 uniformly1x 7x60ht- gx8expgfy from 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 speeop(418w qtfo ib w.6lxd 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 coulduw+ue)z1 t, 2gt v/ t*yt-hcln correctly represent the motion of an object moving with +twt-/ ,cgvz)tne2 1u*ulh y ta constant 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 -xs-. h uro*lbdescribes the motion of a toy car across the floor for 10 secondhuxs.-*ob -lr s. 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 a:ncx gb0d+)+ep z :afwcross the floor for 10 seconds. What was the total displacement of the toy car for the ezea gbx:p:dw + f0+nc)ntire 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 maj f+0 ta1/zcootion of a toy car across the floor for 10 seconds. At what times or time intervals must the net force of0aza t+/jc1 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 khp -d,e difx8tfi,h+wi ih5 9:m/hr in 4.50 s. Which one of the ,+hi9:8pd-fiedw,h thfx i5ifollowing 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.wir +sqc*e,yom x-:28li uu t versus time curve shown. Which of the following statements regarding its mtcix .-2uoq*, :rils8+euwymotion 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 alongd4ev-i31sz2 l znh:epl+oty 7 the x-axis according to the velocity versus time curve shown to the right. When7-zl l:tpizh+e y 1d32n4vseo does the car have zero acceleration?


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45#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  06.22: During an intervalyiu7e,* 1vah-8n :cn7 dhpb1s ) ecojx of time, 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 osnbeyh:,1 )ia7u*ve-jc 71npx8 dchstatement 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 150 kilomgcg 9mpt -y-4: mjq */zpl7thbeters apart and traveling toward each other.tl-gq4:cj tm* pbghz79m/py -
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 posit;l;;t to)pd c kdv/y8wive and increaptvd) /yo8ctd;l ;; wksing

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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 averagx :aybu(8 vs7ze 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, wzv1pmqe4 l7k2lz-udd; g8 twip8s, p(hich one of the following choices identifies quantities that must have the same direct(zg8 lsk- t pm l8qpd;u4wdi,e1pvz72ion?

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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 k5uh*eqk5mj/ )ah ,9xdh2uat$3.0\;m$ 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-a45o9vsj pbuyy.o5 d6time, $y\;vs\;t$, 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-dimensional track for total time T :zrok 0)wvm3euu 8zsn9l4zd0 in two partulz)9zw34o mek:sz8u 0nv 0rds.
• 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 ofa *w..7sl ps1 j4x+tj/ cfssyi a car on a straight track is shown in the diagram. The thick line r1 c4. 7slj spjssa*t.y i/w+fxepresents 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 fot;vtd7kn s.+y+njxa(6pwj0n r the motion of a car on a straight track is shown in the diagram. The thick l t;tn7xy(6 +0d+j napn wjsv.kine 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 m*qz,;8r ocvdmotion of an object given by the position vs. time graph shown. For what time(s) is the speed of the objecdvzqmr;,o c8 *t 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 given byg0xthf r2o. f:9mga(w the velocity vs. time graph shown. For which:(92o. ghwt0f agmxrf 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 acceleration vs. time graph for a fixed tc .3kh jpk)a3time interval of an object’s motion, what quantity has bee k)c.3hta jk3pn 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 increag.9m u-lvs 3g/kz8 vtpsing 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 trinfm 57spou 4fwd,( /aep 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 released from(v ixd(go 2gv, 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 rlw4gfx0:)z1uq t9 lkkwp9 a9 aeaches 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. tim z83 gg*u*,aj0m inc.j jumd7me graph of a particle moving along a horizontal axis is shown. What is the total distance traveled by the padim,8jj*7c* 0j amm u3 .gnzgurticle 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 fom(( omuu1gy /h8utt bn.qc-g4llowing choices correctly identifies all of the listed situations for which there is a non-zero acuhuq(mu o8m y/(t b .1ngt-4gcceleration?
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 objecxw ,l fh15n1l1a pc:/zblr/:t5hwnan t moving along a line is shown. The object starts from rnhlnf an 5 p:b/1t1x/lhzralc: 5w1w,est 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 vseq)ju4v g+q1( vpqh*j. time is graphed. g1 jujqpqe* v+4h(v)qWhich one of the following choices best gives the proper interval(s) of time for which the object is moving away from the origin?


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66#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.09: Two cars are moving to the right on a horizontal track, is;bj2mt xz8 7*n8hozeach with constant acceleration. ; b72x8zh* tjnm8oiz sAt 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 b*4owos c+)mdcc4qaqz: 48o (3xa flhposition $x$, 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 dx7wgw m/ii-jsmy)i5nme juc;au :+ )+*d d1cin the graph, which one of the following choices correctly describes the relationship between the average speed omiu:)w w me1id /m-5jn jc) d+x*gd 7+cu;ysaif the truck to that of the car?


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69#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.42: Which one of the following choices best describeg4* zjvdd05mes the instants of time, at which the cam5e v04zg dj*dr and truck travel with the same speed?

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70#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.30: Two cars P and Q, each start from rest at the origin and will movem-zls az gaoi+fet6+rg u-e +;6bg(s4 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 spegu6z6a g+-eoe +b;rf+-4tli(zmsga s eds $v$ 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. timexvq4 -9oy0gzi ek41 lr graph of an object moving on a horizontal line is shown. At what time(s) is the objecv4x4zro1 e0- y qgk9ilt 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 the position vqw us+3sqga1+sar3 z *s. time graph provided. During what13au+rs+sqga sq *z3w time interval(s) does the mass have zero acceleration?


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