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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 speed around a circ;jq 9gq;j;fag d u)my1ular 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 witsb zb 6hzvp;w w07i*//kpuo-ghout reference to a particular direction is calledz /o;/bu0 w7v6zp p*w gihkb-s

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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 (3ejq0eb kru+y-ex jtz .1-sqat an average speed of 50 m/s anq.e kx(zju-3-jb 10s eq rye+td 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 at thekp80 y kq qho0k,b5i+s*ert 2c constant velocity. If it continues, h hq0s o2cr8, *eyqt+pik 0bk5kow 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 stationary on a 30-kg plank that is slidingo*d2v g rcw h, oro30ig,0-u ivg3dyi; at 5.00 m/s to the right across a frictionless oi ruv,0i3wo,g;y-o0r3*g2dvhidgc 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 is ;q15 s3b wvmbtthe average speed of the motorist ;btb5qsvmw31 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 traveli-l4nw umefm17ng along the x-axis. The graph shown below is a plot of the c 1lm 7m4-unfwear’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 36vgy9 to l*omrefers to the motion of a toy car traveling along the x-axis. The graph shown below tly og 3o*9m6vis a plot of the car’s velocity in the x direction, $v_x$ versus time $t$.What was the acceleration at 33 s?


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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  97.22: This question refers to the mo lw7c,kz5qkc(b)6 gf;ky)x ww tion of a toy car traveling along the x-axis. The graph shown below is a plot of tqbc7g5)lk(; wfz) xcy6k ,wwkhe 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 vs. time of a d 0p. ztl+nwh2f.z ;nvtva.2zg uck flying due south for the winter. A;..fv2h+tvl wpz gz0zat.n 2nt what 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 ref...rettk ccc3 er to the diagram below which shows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. et 3 kc..trc.cWhat 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 els/ f5gw4 hsi.yapsed time of a car starting from rest and uniformly accelerating in a straight line. The average acceleration during the entire 3 second interval is closest tosw.i5gf syh/ 4


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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 theb250 idvt0/xv+orsl v velocity time graph for an object with the position time vvxbv025 /l0od tisr+ graph shown in the diagram at right?


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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  00.28: The following question refer to the0i 0a9ms 47izir* lfsy following information. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the r9zla 7*0yi m0ifsi4sfloor 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 itj5 *+qz1lj f*idy2 oonformation. An ideal elastic rubber ball is dropped from a height of abof5qzl1i 2oj +jy**dotut 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 with a speed of 2y-qh,d7tlc enc i06;dwwjj) $v$ 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 i .(2lk3 t:txrw;lfib1 hn.xzo: 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 follo* /wkfuv*)g) uexxh c6wing scenario: At $t_0$, two cars moving along a highway are side-by-side as they pass a third car stopped on the side of the road. At this moment the driver of the first car steps on the brakes while the driver of the stopped car begins to accelerate. The diagram below show the positions of each car for the next 5 seconds.
About what position after $t_0$ would car #1 and car #2 have been side by side?


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19#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.03: The question refers to the following sce3lfyc b5ka- ndd32l l 7epf41fnario: 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 7hwy (mwu,:v) xgm7utrefers 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 ramcks7qx *y doymcs.hglf 4i)0wp)0b:(p, across a horizontal table top and off the table edge. Which of the lq .omxhfk :s(i700)ygydsb)cw4c p* 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 relat-cld /* 0qayqdionship between distance and time for an object that is moving along a straight line. What is the instantaneous speed of thel*0q - adc/qyd 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 repref 7p87 tioflqjc .4asb gj ti.67f3/lh08dnudsents the relationship between distance and time for an object that is moving along a straight line. Between what times did the object have a non-qjp0 ct .oun6at4id8dl7f jh 8 bsl.fg/ fi773zero 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 initial sp*ggh o4 /y ms zmsyu(0d0sdf),eed of 12.0 m/s from a position 10.0 m above tms *gh4y0 dzy()o0,u fmg sds/he 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 tu5d:b 2ah3: fsp *shgdoy car starting from rest and uniformly accelerating across the floor. The time and distance traveled from the start are ddgsh2 :s3pu5a:fhb* shown in the diagram.
What was the average speed of the cart between 0.1 seconds and 0.3 seconds?


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26#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.12: The diagram below represents a toy car starting from rest and unifory4flwk2gef-s 093zay mly accelerating across the floor. The time and distance traveled4y sy9zf gawk302-fe l 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 unif8 ror+ox fd)7t 95mp)e7g bwvbormly accelerating across thw+ vb7x)op5o)ertd8mbfg97re 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 bedmd),:f w* ca uniformly accelerating ball. The position of the ball each second is in :m,)fdd cweb*dicated.
What is the average speed of the ball between 3 and 4 seconds?


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29#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  04.09: The diagram shows a uniformly accelerating ball. The position of them9 n)2/slp 3y zgwnys6 ball each second is indicate s9p6w/2yly mn)3zsngd.
Which of the following is closest to the acceleration of the ball?


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30#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.17: The motion of a circus clown on a unicycle moving in a straight line is nblugiqn/d*mhp)8 63shown in the guil bg3*pq n68h d/n)mraph 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 wojkz6zw/km2w0nfm4h;(om ( unicycle moving in a straight line is shown in the graph(6/4jozok wk0 mm wwz2 fmh(n; 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* -qhyeqr wsxfj(,t8t 0vg2 k- vacuum 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 the mot1e j(;y 22sa2y l8vvdqb7 tipeion of a marble on a table top for 10 second2yeqsv1jid;8 l tv e(272ba yps. 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 smp,az,7vjlj bdhbo 3542 nf3a table top for 10 seconds. For which time i, d4nf, jj 3bhl 3szbaov27p5mnterval(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 graphsu lz 6a, rl;)j/w *tsfvgfwa8.:yyd0 describes the motion of a marble on a table top for 10 seconds. What is the marbles average acceleration between t 8 l: zr0ty*6dy,fswl vaawu;gf.j/)s= 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 unifo/ae5 bd:vvhl0 rmly 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 c :fms 6ps-cg)with a speed of $20.0\;m/s$, takes $2.00\;s$ to reach the ground below. From what height above the ground was the object thrown? Ignore air resistance.

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38#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  04.03: Which of the following graphs could correctlhx,nssnxy, jaj/* .k)mdp0r4y represent the motion of an object moving with a constant speed in n xy*sx), ,jsa/ k.mhpjrn 04da 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 th0c z)b2vu 8efqe motion of a toy car across the floor for 10 seconds. What is the acceleration of the toy car atev)zu8cfb2 0 q 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 a9lau5gi-ixpp7qi f q*49 7)ujxrud/r cross the floor for 10 seconds. What w f4r5)d ugrixp-*q9uq7 pjxl9uai i7 /as the total displacement of the toy car for the entire 10 second interval shown?


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41#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.26:The accompanying gra(ovzj/bv ;n8c ,c;,h axy m:yrph describes the motion of a toy car across the floor for 10 seconds. At what times or time intervals must the net force on th bz rxn/;a;cyc ,voyj mv8(h,:e toy car be zero?


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42#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  16.03: A car accelerates uniformly from 0 km/hr to 60 km/8fvmue 4p:hcpcl; q :8hr in 4.50 s. Which one of the following choices best represents the acceleration of the cql8uep4 h8 vf :mc;c:par?

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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 velocitg1ziyx /ddz u/ 50+(m7jokiiw y versus time curve shown. Which of the following statements reg(j ux d/ /d 5z0iykwz+1i7igmoarding its motion is NOT CORRECT?


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44#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  07.17: A toy car moves along the x-axis according to the velocz;lil q1j:mlogkw: r -x7b+x.ity versus time curve shown to the right. Wlm+k w:;z- 7oj xb lq:i1xlr.ghen 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 interv *. wjye3d 1mynjcgn:3al of time, a tennis ball is moved so that the angle between the velocity and the acceleration of the ball is kenj .yn3cg3wm 1d:jy*e pt at a constant 120 degree. Which statement is true about the tennis ball during this interval of time?

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46#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  07.03: Two automobiles are 150 kilometers apart and traveli0 8xchzkg i*,cng toward each other.0cz*8,g xhikc
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 anrd);sn g4*m gi -ga3xi;o2 djj28v wmld increasomg g;s 4rdl2vwd32i8jm)-gjain* ;xing

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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 avem ;6k(.jrve+guj t01pzw qvc 2rage 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, whi e*6 05jht rrco)e5p9-q :.gbpfp gognch one of the following choices identifies quantities that must have thngo ppg-5 oc5t 9 06erhq j.fg:bep*r)e 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 movg pve .9jfqa;;tyfd 22es $3.0\;m$ 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-time,j0; d4 )lo8 ii,d.ffuh vauhc) $y\;vs\;t$, 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 tr2si7ubj mxd7(42g tq 4blah f4ack for total time T in two pa4xqg fjid47bs4u2 m27h lba(trts.
• 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 cartzlw ;tob d(+5 on a straight track is shown in the diagram. The thiwotbd +l;z (5tck 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. ti/fau +,. bnb:sfv:t83ruk taq;p ilg .me graph for the motion of a car on a straight track is shown/fq akg,:t+ 3.vb;pbt. 8rfsu il:uan in the diagram. 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 qny9g gvj y o,3q(;nh:sh5 5ifobject given by the position vs. time graph shown. For what ti5gs :y(9y hfqg5h noiv ;3q,jnme(s) 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 oh . wst:xd1ix;f an object given by the velocity vs. time graph shown. For whichxh;s.tdi1 xw: 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 r 7 d :ruvmos8cqc5rfy )4kk57graph for a fixed time interq yc u4m7 rf5sk85drr7 vokc):val of an object’s motion, 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 j 6c5vp 5,gga6,d beobalong a horizontal line with 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 trip in two partsv7 -i8u:on(m7/g c vn*rcmknr :
Part 1: it travels a distance of 800 m at a constant speed of 4.0 m/s.
Part 2: it travels a distance of 1200 m at a constant speed of 20.0 m/s.
What is the average speed of the car for the entire two-part trip?

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.02:A small object is released from rest and reaches the ground in a t m+wk73d )dwusime 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 n9; 2i-karcekreleased from 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. / t vka5gkc1 dhs67 ojirb 6,lbu;4v.ttime graph of a particle moving along a horizontal axis is45dt,17ru .habvbvt/i6k;ock g6sjl shown. What is 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 irta /g.l-f xq1dentifies all of the listed s .-qx r1l/gtfaituations for which there 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 graph for an object moving along a linek;r72z89rqslo 3 vef s is shown. The object starts from rest at time t=0 s. At what time(s) does the7rv;zs k39sofl8e 2 qr 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 vsz,+)ow -c;bxbk l0abv . time is graphed. Which one of tw0bz-,vb; +b )xko clahe 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 ll ,gp0-)enmpto the right on a horizontal track, each with constant accelm0n-p,pel gl )eration. 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 positizocuuqz05t46 ip 8ua* on $x$, 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 q7 x-3un*)owlh2sswi choices correctly describes the relationship between the average speed of the truck o s* qsxhn)-3i2wu7wl 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 describes the instants of time, luz3tsy4) a5iat which thes t)au4 z3li5y 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 from if8b1 xu+b ;lirest at the origin and will move along the x-axis. The acceleration vs. time graph for each car is shown.ii+8;uxb l1f b Which one of the following choices correctly identifies the relationship for both the speeds $v$ and the positions $x$ of the cars at time T?


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71#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  16.02: The position vs. time graph of an object moving on a horizonthjq9af3 f9vpn 3(tcg (/sb9 xual line is shoq /99nfj39ap(v ubf(g th3xscwn. At what time(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 the positio6zcy5wbk2 3hn;*rjm0ue a f:on vs. time graph provided. During what time interval(s) does the masa5 wkh3yez o;bcr u62:n0*mjfs have zero acceleration?


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