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习题练习:Physics Bowl by Topic 2: Kinematics - part I General Motion

 作者: admin   总分: 72分  得分: _____________

答题人: 游客未登录  开始时间: 24年03月31日 09:50  切换到: 整卷模式

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1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.10: A particle travels at a constant speed around a cpbg)5 -5f,he t illdg5ircular 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 distany; -twyx*9lvo ce per unit time without reference to a particular direction vy-*xl t 9y;wois 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 a circular track at anps0xox5.jt ,n5)l j jgte8i,r:fhk0w average speed of 50 m/s and then completes a j.kjf5xxei hg85t,)l0 t0 wpsr:jon, 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..2; s blzo9:,ze1 f 2 shgkjrk9fh/awn0 s at the constant velocity. If it continues, how far will it travel in 3.asfo9fswzk;2 hl,/ 9nz1 kb j:2hre g.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 stak;+gczf dw.9l ivt+ya .ej3 c(tionary on a 30-kg plank that is sliding at 5.00 m/s to the right across a frictionless pond. The boy then turns and starts walkijdy.lkv+wc; 3+fc i(eat9 z.gng 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. Wha/fghv+v)vk:u /e9c* o tbjp+p t is the average speed of the motorist kcehfg/oj v+pv:bp) v+*/t9uon 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 toyt 2i9snu84ka-)qe tda car traveling along the x-axis. The graph shown below is a plot of the-8ad tai k4qe 92nu)ts 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 re2lb8nlqjoa0e w*: r9mfers to the motion of a toy car traveling along the x-axis. The graph shown below is a plot of the car’s vel bmwl*l jaqe2r 89n:0oocity 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 refersj+*e5vru1r d y to the motion of a toy car traveling along the x-axis. The graph shown below is a plot of the car’s vejv+rdr5 y e1u*locity 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 velmz:vdk lvu8otcqfq/co -x, .f8k46/ bocity vs. time of a duck flying due south for the winter. At what point did the duck stop i/.l- vof,4dkc8z : t/uxmfqv cko8q6bts 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 refea rnm a-q h/j,nsgjf70 2w4z9ar to the diagram below which shows the position and elapsed time of a car starting from rest and uniformly accelerating i wz2 grjnsaaqnm0 9 a74/hjf-,n a 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 xt 0z1w**/yf g:1k7fivnpiv cdiagram below which shows the position and elapsed time of a car starting from rest and unifo7kny: *tvfi*i0zp 1 c1w gfxv/rmly accelerating in a straight line. The average acceleration during the entire 3 second interval is closest to


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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.20: What is the shape of the velocity time graphhlfgn1f-.1pd ie*/m-r )vel x for an object with the position time graph shown in - . gpin /xe*1vl)mdhr-l ff1ethe 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 ideaf6e h0 lf 6u9cjyim1;bl elastic rubber ball is droppfu0cj;yem 9if 61hl 6bed 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 toh vv:o 3tdv; ols54y.1q: pfro the following information. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor and rebounds to itf sq rvvp o43o5h y.t1l:;v:ods 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 traveltqb v7u/c,5el,js lx* 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 /8ogx+; spsei zc0ryc ruz8**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.
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 foe.g r u( cr-dwfx/q97hllowing 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 refegcd2 r05d (fhsrs 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 t 54d7bxxxbq 2ehe 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 ojecdd)t; znl/ mw s/j0 vnh+m) ;d)d,eff the table ejtdsdwzc, m/ljn;e +dvhe0))d /)m;ndge. 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 repbe:;s k-hl8gjqkb2j 1resents the relationship between distance and time for an object that is moving along a straight line. What is the instantaneous speed of the object at t = 5.0 seg 2k18:qjbb- hekls;jconds?


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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 betlyuddf;o )1 z n po4jf8yi6:b(ween distance and time for an object that is moving along a straight line. Between what times did the object have a non-zeri)zl8d f fnd(by ;j6:41 yopuoo 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 straighti)k-) 5 dgm* f+kn98jotogiva downward on Earth with an initial speed of 12.0 m/s from a positi)dm)+kktnv * ao- i9gfgj8oi5on 10.0 m above the ground. Ignoring air resistance, the speed of the object when it reaches the ground is

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25#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.11: The diagram below represents a toy car starting from r5uax;mu5lfiq+z02 maest and uniformly accelerating across the floor. The time and distance txi ;uul+m5zm250aq faraveled 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 represd9afb p0ny2- b:dv+w sents a toy car starting from rest and uniformly accelerating across the floor. The time and distance traveled+:fyb ddbsp n2w09av- 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 repres5e2 ;6cpjbs6m ii3(ml jj;tpwents a toy car starting from rest and uniformly accelerating across the floor. The time and dii2cjl( i5t;j6jm;p3 pmb6se wstance 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 ball. The izke01xu/6uhvw( p gw0a4yp* position of the ball each s*1vxuu w(w6z ep 0p0h/y g4aikecond 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. The posit6rl( rz ojr5x9:je- obion of the ball each 5-ojol rb9e 6r:j zxr(second 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 m3fwaqib8yyh)j:06 fcwrb , z .oving in a straight line is shown in the graph belowzb .,a6qiy hfy:3 cwrfw8b0) j.
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 clow c 4dikmds0jwk b,234bn on a unicycle moving in a straight line is sj, bdm4kk wbsi203 4cdhown in the graph below.
After 12 seconds, how far is the clown from her original starting point?


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32#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.04: When an object falls freely in a vacuum near the o94gvs , xym2ysurface 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 grapihy31g1cy djr * adf2-+n5phlh describes the motion of a marble on a table top for 10 seconds. For which time interval(s) did the marble have ah3*aycg5 r-y j1 dfd2phni1+l 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 dvsa.+vp(* ghb l4m1im escribes the motion of a marble on a table top for 10 seconds. For whichp m4b.havgsv (1il +m* time interval(s) did the marble have a positive acceleration?


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35#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.13: The accompanying graph describes the motion of a marble on a table to1w efhzxj8a4; f7kg r,p for 10 secoxkhgw 8; afrz,74jef1 nds. What is the marbles average acceleration between t = 3.3 s and t = 3.8 s


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36#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.20: A car accelerates uniform kwe46a /qejt7ij*e0yly 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.jsd- g ggn-.v straight downward 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 correctly represe8xlx)m1b k tf :da+q4e+ qe7oont the motion of an object moving with a constant speed in a straight lineel km1xoq+:qebd4)tx 7a 8of+?


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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 casnz / 014anarcr across the floor for 10 seconds. What is the / s1 cn4zaar0nacceleration 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 t *zmdv(x3sw; sw*s,ncar across the floor for 10 seconds. What was the total displacement of the toy car for the ent*dtz;s,*mw xws3 ( snvire 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 thea3e9rab tugpdok4,dy,4r4mao9 u; e 5 motion of a toy car across the floor for 10 seconds. At what times or time intervals must the net forcd9,, d;rme45reoa uo4up ka4t3a9by ge 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 8nw2b1* 54dimd (gv g6w a04kulmzgcfkm/hr to 60 km/hr in 4.50 s. Which one of the 4wki m4l ggbmv*wd56n 2cgfa8z0 u1d( following 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 vec wc.i( hqqm0;rsus time curve shown. Which of the following statements regardin iqcwq0; ch(.mg 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 acco. l1p;88hi(rpaw:d jcjts7w flb* b p6rding to the velocity versus time curve shown to the right. When does the car have zbb8s61 c:iwj wjlt lhf ;p8(.ppd*ar7ero 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 mfu(j2j.v.d /c lxzm3 aoved so that the angle between the velocit/mfjzaj32x vudl .c.(y and the acceleration of the ball is kept 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 f a.ooe.,u1wjg /05ihrnd u9yeg(c:t are 150 kilometers apart and traveling toward each other.c1tefag i g.(ud9u5oh ej,: w/ yno0r.
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 thw7ffm w0 d wq/ kn(oxsa,v6t45e acceleration is positive and increw57xwtndfk,q 0(wam6s/4fo vasing

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48#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  07.12: The definitio ,td;mwtynfk14cy x hp3-n)4yn of average 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 sb9 4qb3dl5odgl purvp/...c two dimensions, which one of the following choices identifies quantities that must ho.cblvqppd 5u 4g. l d3r9b/.save 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 movessrwk zr5 tq**:p/2xhc $3.0\;m$ 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-timj v-frkp 8u3+ ;omcy/l1*sulse, $y\;vs\;t$, 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 tr3m23o+ jz/gh hnzv; yuack for total time T in two parts.3nu3yz vz/+2 ghhmo;j
• 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 car on a straightc 9d/bg9rm34mh v*hdr track is shown in the diagram. The thick line represen*mr d3h9v9/4 hmbcg drts 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. tim .uyp wd)0)gg,ex i as im9dhu-+6at0zl: gly:e graph for the motion of a car on a straight track is shown in the diagram. The thick line represents the velocity. Assume that the car staehulypdwds gg:)i .tyg:9mzixla-+006 )au , rts 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 t)pcq66,8,no pqz ltzghe position vs. time graph shown. For p)tcz 66 ,go,qnzp8lqwhat 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 velocity vs. time 1qn0ae i(8 ccg)+ll ao8v9xpz;wah5w graph shown. For which time(s) is the acceleration of the object eqwan (laov x0 )c c;ipa8+ql95h1w8gzeual 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 thejf(h) sg vztp ,,+k.set mpb)4 acceleration vs. time graph for a fixed time interval of an object’s motion, what quantit)gpt 4sz,tkj+e m) .,fph(bsvy 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 hori,l,u yvawe5 it*w r;z5z7foy,zontal 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 podge7,fk5-b7q o p2h7,dgc uhe9b z8 marts:
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 grx4lyaq ,oa:y,- ot) 0uujl 3qlound 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 fr 0ksd*0rl xel8m9r,wb om 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 graph of a particle moving along a horiz,ml g/ qx**htbya 9l7yx,m*q pontal axis is shown. What is the total distance traveled by the particle from t=0 to t=1bymm9,lqtx yp *alh,*g7/ q*x0s ?


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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 identifiesxzj/3swa nq eoq/o3:fibo06+ za /ni. all of the listed situations for which thn+inzqi 3f a.wo/boj sxq 0z/:/6o3e aere 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 line ibm,e sy 3:8 7zp4sne tnxhn3m7pk1f; fs shown. The object starts from rest atzpf3x714k8ne7s n3m: ;t s,nyphf mbe 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 origsbui)t+3; *uv:n cvz gin and its velocity along a line vs. time is graphed. Which one of the following choices best+b ;g)z3i :cu sntvv*u 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 t7pq mtnrumt+b0w ahkxq12oga5 m6 8 3,rack, each with constant acceleration. At an instant of time08to 1r65xap m2qw3n tuh7+ mkq ma,gb, 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 9/pnhkqjk,fk47u0wg position $x$, 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 tmcel(5 bw//f4eefk8v w gi0k:ime shown in the graph, which one of the following choices correctly describes the relationship bebil8w5em k0e:ef4 cfv(/g / wktween 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 choices best describes the instants of tt2ae9ab)gnfox4n +m00u kw1f ime, at which the car and truck travel with the same speed?+ w2xut0a o4)anf9egb0 f1mkn

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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 xoj4t pbxy1okw98v-. rest at the origin and will move along the x-axis. The acceleration vs. time graph for each car is shown. Whi-9 xvo8wjx.p ky1b4ot ch 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 horizontal li y8 mvd udk9s2-(/cd 9t(gspkrne is show89cskpr(g-2 u/k9dst d dm v(yn. 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 follo4mmtw3 )u3 *ozztb 2dccs3g(mc,+ozy wing the position vs. time graph provided. During what time in,3 *omzd 3 2ztcbgm+43 wo)tscucmy( zterval(s) does the mass have zero acceleration?


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