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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*qxq( du 5m+5 8vowbyq 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 distu ao-uy+o n2(08ouo xkance per unit time without reference to a particular direction is uko(2+ouyoan 08 xou-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 circuga :9x0d pu,f.q htps;j ,0zjnlar track at an average speed of 50 m/s and then completes a second lap at an90 0p:djpsqx;, atj.gzn huf, 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 stgalu2n lacu*2up yc ,7d0* n6 at the constant velocity. If it continues, how far wilct na2*ygul*, uup2ca0 67ldn l 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 th +sfp6 s3lk(knat is sliding at 5.00 m/s to the right across a frictionless 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?s+f6snp (kl3k

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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 k m(t2z+r:thf73w lxs zm/h and 400 km at 100 km/h. What is the average speed of the mo237 :rtmtw(zls+ zxfhtorist 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 traveling along xhlvt/9oe pe57h m00kthe x-axis. The gevhh/05 mke x7to09p lraph shown below is a plot 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 the motion of a toy car traveling along the x-ayb 6a hsu.,acfjj/1ccv3x 5(0x3kimixis. The graph shown below is a plot of the car’s velocity in the x direxy6vmc0 3cj3a,ikxj/ s bf .a 5hc1(iuction, $v_x$ 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 car traveling along 7d/lsw. ea4aathe x-axis. The graph shown beldasl.e/7 a 4waow 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 of the velocity vs. time of a duc c8 yl.i h k89gjat:tb6k2fz-lk flying due south for the winter. At what point did the duck stop its 8a.8tfk29ijh lt - gz6bclk: yforward motion?





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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.17: This question refer to the diagram below which shows the positionaw dh1n :c5 pcc li0/-f90nais+vy6cf and elapsed time of a car starting from rest and uniformly accelerating in a straight line. What was the average veloni+0c90n1 cdschi-ap :v/ clfaw56y f city 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 beloizcu q3 25 *cg(vu8gd3 bsts3aw which shows the position and elapsed time of a car starting from restcdvg35cub gt2a83z si uq*(3s and uniformly 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 veloci, 3fee6kc34v kcq4msd: d5 p/43 sf;ydsqtwbyty time graph for an object with the position time gr6 4vd spc4 5b efseq kkdy3 3qw:d;y4f/3,scmtaph 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 ads0 m(r8hz9 9nk owg0k ;ker;the following information. An ideal elastic rubber;medk9 g nhrw o0(ks9 80;zakr 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 inform n;1g.m lcff-8 bezp( .wsmvt3ation. An ideal elastic rubber ball is dropped from a height of about 2 meterpmf3 s ctb.1g; n-.ze 8wmflv(s, 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 oy*qmt95woltl8, k a,fuvc,b me9- p/mf $v$ 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 f9o8h*oxe,h jtollowing 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 y/ b9ggbbn3p0nd h36tthe 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 following scena t.rd)fvd 7sf/xwm (z0rio: At $t_0$, two cars moving along a highway are side-by-side as they pass a third car stopped on the side of the road. At this moment the driver of the first car steps on the brakes while the driver of the stopped car begins to accelerate. The diagram below show the positions of each car for the next 5 seconds.
Which of the three cars had the greatest average speed during these 5 seconds?


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20#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.04: The question refers to the following scenariollv:t +o7kt: a j)bhdn5c /)gz: 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 to8 d9 p;(i1kr+ykzes 3v0vlklrp and off the table edge. Which of the following would best represent a graph of the magnitude of the ball's acceleration vs ti19ly+r0k 3k( vidkvprels;z8 me?


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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 between distance and tijs-* x2vk wqzoryx8u0; svn6tclu34+qh*cb 6me for an object that is moving along a straight line. What v z*6hoursk4 vjut 0*s+2y xccbqq6l;3 -8nwxis 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 relationship between distance and time for -er kw0vl ksb8 8)dr2nj z3s1fan object that is moving along a straight line. Between what times did the object have lbr)8v8k n2 js3 skde0zrf-w1 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 thivl.475 /d )cbspr xg x)9wndjrown straight downward on Earth with an initial speed of 12.0 m/s from a position 10.0 d)x 7) sp9lwir5nvbg j.c/4dxm 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 star6.n1u+ia0.tnm4c( a nydnwr 0h pj:fcting from rest and uniformly accelerating across the floor. The time and distance traveled from the start are shown in the diagramnch..iyp0 d n14 nwt mnac(:+0 fja6ru.
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 startigj .8y 7 /uo.es dyr1p3n5vjkzr -rf+jng from rest and uniformly accelerating across the floor. The time and distance travele.jgj z do7rkf3-/n5+prsy yu.8e1 jrvd 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 toy7 0nvngdnoa ux-sc97 u ;zt4*h car starting from rest and uniformly accelerating across the floor. The time and distance traveled fr0 nnu v7 -zh do9u*a;xtg47scnom 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 accexcceeys)h(0 5lerating ball. The position of the ball ea0 y)sx ehcc(5ech 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. The position o(5f*ua z5 5ve*wd guqof the ball each second is indicatqu f(*gwa 5uev* 5z5oded.
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 straigh m *my.yzci)i6t line is shown in the.)*yzyci6 mim 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 unicycle moving in a straight line is sws+fa-b6b ouw9 s yl71hown in the graph belobufw s+a617 s ob9l-wyw.
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 suqfiyv c9;v.8gdx9hg- rface 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 th-vnn,d9zaen tg; l ;cbq*21 zhe motion of a marble on a table top for 10 se;nnnb d va2g*t1;zq e-lz9c,hconds. 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 a table tove9y oe +t y.vsi,. pzr)2ntg0p for 10 seconds.rvnz.ey9t2py 0 i,oe) +s.tgv For which 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 motivr dcg75jr 4,hon of a marble on a table top for 10 seconds. What 57rg4v,rch j dis 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 uniformly fron f0b:d4 v8embmhn:z ;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 ae- wuxxx)gq z* -*:kwp9kubs; 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 w bw*qs nl:4yag0h,r+jajk10could correctly represent the motion of an object moving with a constant sja:b1 *,g k0ln4 wqj0+s rhaywpeed 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 gide/,y/:wb h;a: ndgaraph describes the motion of a toy car across the floor for 10 seconds. What is the acce y;, /g aidw/:nahe:dbleration 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 ofn*u-la jt9:) a,ivjo,a b9 (x(ih0auxsqvw1 t a toy car across the floor for 10 seconds. Wv, -a9ax1(t(o*0btslauq vj9nauwi:j, h x i)hat was 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 graph describes the motion o bd zjdv +yjp(t-tx*/s ;,xqes;jbj;+v u 7ph;f a toy car across the floor for 10 seconds. At what times or time intervals d+jj y (ptpt, s xjqzh+xb7 ;;u-;bjd/evv; s*must the net 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 f+:; r1f s9cvniny8z 6yjc;hjorom 0 km/hr to 60 km/hr in 4.50 s. Which one of the following choices best represents the acceleratiovz rny+;ihcj9:6 jy;s fcno18n 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 vemlvc1j g 9ma/(rsus time curve shown. Which of the following statements regarding its motion is ja lv1 m(/gcm9NOT 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 :(tg5b 6v wcebaccording to the velocity versus time curve shown to the righ:wev6(bbcg 5tt. When 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 interval of time, a tennis ball is moved so that thw3*0hai jdg eec-ex 74e angle between the velocity and the acceleration of the ball is kept at a constant 120 degree. Which statement is true about the tennis ball during e*w403ea g j-hx eic7dthis 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 automobile33jwedaew ov;v):7t z s are 150 kilometers apart and traveling toward each other.3w ew3)vdotzja 7:ev;
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 acceleratsja-8hp dqdd0ko6 * 1yion is positive and increasid-oh k1dqsjy d6a*0 8png

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48#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  07.12: The definition of average ,w v qrpl1dq45*no6r tvelocity 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 g2iznw( 7e,ce in two dimensions, which one of the following choices identifies quantities that must have the same directio c7z (,2engwein?

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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 t ysuqrsti., zqu1 a9 0kics.1g.-f4j$3.0\;m$ 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-tbp( hg w:t+ -2zbk-ykgime, $y\;vs\;t$, 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 track0pc k *q.l, xfnuq35in* xy4cb for total time T ipl* 5,f40cnykx *xq .3qu cbnin two parts.
• Part One: The car maintains constant non-zero speed V for the first $\frac{3}{4}$ of the total time.
• Part Two: The car accelerates uniformly to rest during the last $\frac{1}{4}$ of the total time.
What is the ratio of the distance traveled during Part One of the trip to the distance traveled during Part Two of the trip?

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53#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  08.23: The velocity vs. time graph for the motion of a car on a str1fgs.mz*2 nl oaight track is shown in the diagram. The thick line represents the velocity. Assume that thef nol*ms.g 1z2 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 vjdj2ggu -z* q l-es2u5jzxyx( 4o;:xthe motion of a car on a straight track is shown in the diagram. The thick line rel (5:sxu qz gjj2-zxxyve2-;goud4* jpresents 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 givenvi/ d3q vfi7nj9hma lj vd- +yi8e92x5 by the position vs. time graph shown. For what time(s) is the speed o n782if 35-9 vj ijqdlvv/xd ay+eimh9f 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 vh2khf6,9mhejodgh0 0elocity vs. time graph shown. For which time(s) is the acc,0 dgh2o90 hhkfjhe6meleration 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 forva fuq5 9a7ui; a fixed time interval ovi9uf 5qu7 a;af 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 along aq(jfk/0oq7 tw ,arg q(ovu h,hwx276v 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 va)3d/m/ hauaparts:
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 resqhvjia(q +c 4-t and reaches the ground in a time of $2.50\;s$. Neglect air resistance. With what speed does the object reach the ground?

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61#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.03:A small object is released from rest and reaches the ground in a time o,/z v5y qocnr)f $2.50\;s$. Neglect air resistance. From what height above the ground was the object released?

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62#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.17: A position vs. time graph of a particle moving along a horizontal vy jc1nko;ku:c,,rkk 1n+bg d lomp-d-1:)co axis is shown. What is +dkg1m-on o v:1blc,-n1ok,rkucjcy ;k)p :dthe 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 identifies all *s x/(*m1yji 3-r:jadngk*b ndw+oodof the listed situations for which there is a non-zero ajx k*bn:mws(odi+rgj31yadd **/ -oncceleration?
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 is shownwgpb/f(kq 6dt;v*g .jsfku: zpf-(f7. The object starts from rest at time t=0 s. At what time(s) does the object attain a maximum displacem7vwzdk f/f6pqs kf-((t;bfj*.ug:gp ent 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 origi:fw,2n-s nofq i,bf r6,i.iknn and its velocity along a line vs. time is graphed. Which one of the following choices best gives the pw i ,ksion,b:i f-qfn.n2,6rf roper 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 tnsnw kqi,twhr(; 1 tkg9z9i, .he right on a horizontal track, each with constan,9,k.k w tntwn rhs1z 9ii;(gqt acceleration. 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 positi :) i(df(t6cd jkq*qnaon $x$, 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 sh-zg7,awh6 zym.e.se;1vpsqkown in the graph, which one of the following choices correctly describe7za.m -e6 sy,pqs 1;z.hkg vwes the relationship between 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 descriz,*6n8ijifmzhmv t j g-hux b,ye*)5)nw6v(n bes the instants of time, at which the car aum*6,h)e hf(njnbgyz)wizx, 8v -v* 6jn tm5 ind 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 Qe+u((.g .q 9ovzqbyeq , each start from rest at the origin and will move along the x-axis. The acceleration vs. time graph for each car is shown. Which one of the following choices correctly identifies the relationship fou eyvb.(zoq q+9(eq.gr 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 horizonta15rokdiw qc i5xi; *-7*dtxzwl line is shown. At what time(s) is the object moving with its gr7x*iiwroc 5i51-dt dxq k;zw*eatest 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 th-ygpdu( +jf7ee position vs. time graph provided. Duyf7gdje u( +-pring what time interval(s) does the mass have zero acceleration?


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