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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 circular path of r sv/-e a/)ib1lhw :pvkadius $R$, 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 dist6t+ 9kogl2k gtance per unit time without reference to a particular dir t+92gk okgt6lection is called

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  12.29: A vehicle compl3j ev43as9if g2tl dj7etes one lap around a circular track at an average speed of 50 m/s and then completes a second lap at an7 j 2i 3tafsed9gv3l4j 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 0.8/2 uvfhpb-l9q+x )t1vdudb1t 0 m in 1.0 s at the constant velocity. If it continues, how far will it trau1 t+/ uxv1q9bf2d hbt- dplv)vel in 3.0 s?

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5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  05.34: A 40-kg boy is stationary on a 30-kg plank that is sliding at5k)6he z;zie nl la (3g/j;lyg 5.00 m/s to the right across a frictionless pond. The boy then turns anniy ;khzl3/6j z(ll g;g5 a)eed 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 40uot7k5ku gx j1t9 g wu-/z)1xt0 km at 80 km/h and 400 km at 100 km/h. What is the average speed of the motorist on this tri-x 1791otuxk)g tjtu /k zugw5p?

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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 /dezv4(nx /, umfzw(e-6olcftraveling along the x-axis. The graph shown below is a plot of the car’s velocity in the x d-(dzx/fwvn,o 4 emlu/ ce(f6zirection, $v_x$ 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 traveling along the x-apftzc/3+ 6r fc pxss(6xis. The graph shown below is a plot of the caxf366f + zp/cpc r(tssr’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 to6sckuf (if8v/ y car traveling along the x-axis. The graph s(vi c 6uf8fk/shown below is a 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 ofmb ke,76aifw yr,f f8u1j0.k r the velocity vs. time of a duck flying due south for the winter. At what point did the duck stop its forward kuyr. br10,f,6e kff i8w7jammotion?





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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 8v-e mvbo c8:cwhich 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 car during the third secondb8emvv:c -8 oc?


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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 br l gr-x8rq4.diagram below which shows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. The average acceleration during the entire 3 second inter.4-g rq8 lbrxrval 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 forhy6;, 1.w kljge d 0+avpzeobgip;0z7 an object with the position timkbd1g,pio;7g0; .h0l6v+zeeajp yz we 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 the following information. An bya7wy0e1+crvhq so5 lek( mf9ww135 y ab)b0ideal elastic rubbvbl) 9raa5q5s0w71ey ef+0bk (yhbo 1 ywcmw3er ball is dropped from a height of about 2 meters, hits the floor and rebounds to its original height.
Which of the following graphs would best represent the distance above the floor versus time for the above bouncing ball?


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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  00.29: The following question refer to the following information. An ideal e j;b.g8r0 ww)ez 0c )fm1i-e s-ywcqfplastic rubber ball is dropped from a height of aboutmresw0w-ewcy)q1 p;0izf.j 8cfg-b) 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 ( u:tyvc9j ko8a 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 sce5vt6 lafgx3)hwrxo2gp0 o7,t nario: 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 thua 8m4eq2zf73+s ai fsb *fkr70 3xttqe 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.
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 folloqz3)q y d;v yr -jl w++n-phe6i,z3zlowing 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 m dsqadwk0m4gkj;.-i*x ,df(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 table top and off ern;gwded;4 ir,ve+ - the table edge. Which of the following would best represent a graph of the magnitude of the ball's acceleration vs time? iwg d;,ee-v;d+rn e4r


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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 relatig bj2t h,rbw2i8/ x.jqonship between distance and time for an object that is moving along a s tbqw b2j/x.jh28,ri gtraight line. What is the instantaneous speed of the object at t = 5.0 seconds?


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23#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.02: The graph represents the relationshipuc;,f8;q vf - m,(ogaqn oliq3 between distance and time for an object that is q ;vciomag8-fq3un,ofl(q ;,moving along a straight line. Between what times did the object have a non-zero acceleration?


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24#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.07: A small object is throw(dnz87 6nk5g0 oxo/qhp frd8ln straight downward on Earth with an initial speed of 12.0 m/s from d5 f7( kdlnhpxgr80nz86o/ qo 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 bes/yteq8ar +6 klow represents a toy car starting from rest and uniformly accelerating across the +ey6rtk8 s a/qfloor. The time and distance traveled from the 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 7 q35ufi utjuxw s93p0represents a toy car starting from rest and uniformly accelerating across the floor. The time and distance traveled from the start are shown in tt3ifs7qpx9j5 w0u uu 3he 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 re f *mbg 3jy(rt ,25lsqg0g9vdxst and uniformly accelerating across the floor. The time and distance traveled from the start are shown in the23btvfg jy0dsm l*,( g 95gqrx 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 ab9 ej; /* qjj5s2yjele uniformly accelerating ball. The position of the ball eac5l*j j/ qe9b ey;sj2jeh 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 shl bj qu)kf ,5e.wd27qxows a uniformly accelerating ball. The position of the ball each second is indicat7je2lqx5 )bw.k ,duqfed.
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 ow1 .4l1ost v6wk xnom,(mwn *a circus clown on a unicycle moving in a straight line is sho w,. mxmlnw1st(o*v n6 o4ko1wwn in the graph below.
What would be the acceleration of the clown at 5 s?


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31#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.18: The motion of a circus clown on a unicycle8i;x yvbz jv,w1z9kkj4b )b*u moving in a straight line is shown in the graph belw,b4 v)yix18bbk zuv jjkz;* 9ow.
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 on/ie:.d0hrohy2 e) uearth

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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 tc;(e8.rkfj 0m2og m3s quc+xydbi81 w, yk rk7he motion of a marble on a table top for 10 seconds. For which time int 80 83ybrmf( ,;e17+o.ysruckw dcm2kxkjiqg erval(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)b /b7anvvk y3 motion of a marble on a table top for 10 seconds. For which time interval(s) did the marble have a positive acceleration? kbv7ban 3/vy)


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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 ta zg -*gg3k-d09 kiowyjble top for 10 seconds. What is the marbles average acceleration godz3j-w- *9k ygk0g ibetween 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 frocabb cg 8wqqygmp11j*4q+ qk 4m :h/m:m 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 m /ds; .;d+witgqmxxi;2 j3w qspeed 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 represent the mnqiz.,5mrftru q6 zh*/ar3zhf1rbi /g u4w/ 2otion of an object moving with qt 5rwg4i u hzzan3/6 r/rzrq,b2*.u/ifh 1mfa 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 describes the motionszy)(g4+ muzbs8lr f*y re:5 i of a toy car across the floor for 10 seconds. What is the acceleration of t ie )ys4+u5zgrslr b:yz m*f8(he 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 desclb*01* b yu*vuo 2niheribes the motion of a toy car across the floor for 10 seconds. What was the total displacement of the toy car for the ent*uy2oi bn** l 1ehvb0uire 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 acro9j )zwaldo 4r : -lwwnoa pgfgn,6m;64ss the floor for 10 seconds. At what times or time intervals must the net r afjpmgoown al)4gz6nw9,:4ld;w-6 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 60 km/hr in 4.50 s. Wbxo;rhq6 6*p+yn5rnl hich one of the following nh5yp *6;lr6no +rxqbchoices 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 tti*ltfk( (lmh+ y/3+j3 ay ajiime curve shown. Which of the following statements regarding its motion is NOT CORRECT? j(t +ht y/klaj(*i3a3m+lyi f


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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 velocitxf5pe sh(hl;) bq4zh; y versus time curve shown to the right. When d ex;phhfl) z;b5( sqh4oes 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 tennis ball is mov1.e f2 u.fddwax-f 0cx9d;).ewvsvq q ed so that the angle between the velocity and the acceleration of the ball is kept at a constavfqw 90 -);faxe dw.vxudq s f.2c1.dent 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 traveling toward eachudo .cu2tw sjq,:7wk/o- 9b ix other.iow.7j9w u/ -q s kcuot:2,xbd
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 acceleratiov 3l3*wcue0zk gb) tnw0n3g :yn is positive and increasin l3*)33nw0tg:z egb k0cnw uvyg

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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 ave 8ge:ies7f.,xd*pwf rrage 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 the following choices0jvp2ooxod7s9qs+p6flmy fm 1/i 97k identifies quantities th9mo062i9d 7 fy+ lsv1moqjfpko/ 7sxpat must have the same direction?

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50#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  09.17: A toy car move ds6tkf*zm4 a;;x8kan i0pw 3fs $3.0\;m$ 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-pn+ oora .n;6stime, $y\;vs\;t$, 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 rihx3 / zrhon9*o2k*v mvght along a one-dimensional track for total time T iv*nxvo*3mho 2k9zh/ rn 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 thw 95x0idexl0ut a 19bt5yqc/lyha0. nfq*q7se motion of a car on a straight track is shown in the diagram. The thick lq cd0e 5ixab*uylfttxs0laq9 /7q nh95w0. y1ine represents the velocity. Assume that the car starts at origin $x=0$. At which time is the car the greatest distance from the origin?


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54#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  08.24: The velocity vs. time graph for the motion of a car on8nvbih993e cpiy/qamhr):r* a straight track is shown in the diagram. The thick lvi9/r n9 mcei:*qhry38p a)bhine represents the velocity. Assume that the car starts at origin $x=0$. What is the average speed of the car for the 10 second interval?


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55#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  09.08: Consider the motion of an object given by u8*rdmj 3xq4 mthe position vs. time graph shown. For what 3drj4um x8mq*time(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 of an object given by the vqvb u vpz+)g;3elocity vs. time graph shown. For which time(s) is the acceleration of the object equal to v3q puzbv;+)g0?


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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 fo z py+dcl7+q /-n1n5cb.q 38w6iiz r fegc3eeir a fixed time interval of an object’s motion, what quantity has beecf.+n 7l nw53qy 8be/riizz6ce +dc1e i-p gq3n 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 wi8ynul3yz e9 5gn34pakth 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 *sikcmxzvg6ddv- -xu*. c2n i25b7ogtwo 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 rest and reaches the ground8:ltvptrawt g 0xu*+6 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 re9v,w8-q7m jnf.i9bh7kn y bn uleased 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. time grdfw 75.qunp/-fwrqr n t 5a.zq lu4:*iaph of a particle moving along a horizontal axis is shown. What is the total distance traveled by the particle from t=0 to t=10s ?a.nz4* :pf r/t5r-qq.flw in u7uqdw5


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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 correc y)2jh9ym9)utv x0cxstly identifies all of the listed situations for which there mxv2s 9 t 9)yxuj)0cyhis 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 mo v w*sa2jy5k3cving along a line is shown. The object starts from rest at time t=0 s. At what time(s) does the 3aj *kvywcs2 5object 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 ly5vnb(w;p / rzine vs. time is graphed. Which one of the following choices best gives the proper interval(s5r/p zv;ywnb() 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 movink8bp*z2cdw +sg to the right on a horizontal track, each with constant acceleration. At an instb+pd8kwzc 2* sant 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 pos,) gjcl2.r nfsition $x$, 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 showo)ikkgyl s- qr9r+:qdt:-su * n in the graph, which one of the following choices correctly describes the relationship d*ol9ktiy-g )::s + qsrr qk-ubetween the average speed of 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 c58nehpt:1 w.kcwz7 -in(g xqbhoices best describes the instants of time, at which the car and truck travel with the(-nn tqw wh.c gx5i1z8bkpe 7: 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 ori)su ctz4y9oam4mz)1 xgin and will move along the x-axis. The acceleration vs. time graph for each car is shown. Which one of the following choices correctly iz )omxy9u1tza)s mc44dentifies 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 h;d2qkju x:q ;v51dv 7l r6i9+jdor rbsorizontal line is shown. At what time(s) is the object moving with ik9qj: rd j;bo57r2 x;irv6sd1lqd+v u ts 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 folljep:+fzm w 1d(owing the position vs. time graph provided. Durinz: 1epd(wf+m jg what time interval(s) does the mass have zero acceleration?


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