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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 aroj0o+g0j 0wk c 6umoprs e)66vnund a circular path of radius $R$, if the particle makes one complete trip around the entire circle, what is the magnitude of the displacement for this trip?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.01: The change of distance per unit time wit bmr*0 c:bgov:yds; e.hout reference to a particular direction is calledbbm:g0sod . r*:ey ;vc

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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 an averamhk:0beth .z 3ge speed of 50 m/s and then completes a second lap at an 30.tez h mhbk:average speed of $V$. The average speed of the vehicle for the completion of both laps was 80 m/s. What was the average speed $V$ of the second lap?

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  95.03: A toy car moves 0.80 m in 1.0 s at the constant velocity. If it c0h c) 6oi;t1ps 2vjiypontinues, how fa po )t2v;hi60ijyp c1sr 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 sliding at 5.00 m/s tgwk6o0t k80+ b-vzis do 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 thet 08 wsvdk06+zogkib - 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 isl 2gi8hllvg )wc r1w/3 the average speed olw23c )igvh/lw lg8 r1f the motorist 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 mot 7s 55: uikgkr:qqvl6sion of a toy car traveling along the x-axiqi5:rk 6ugk: 5svs7q ls. The graph 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 travelix2+ec +ees1sl ng along the x-axis. The graph shown below is a plot of the car’s velocitye 2c1lsx+s+ee 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 toy car traveling m i ib yn.hcx7nf65-5aalong the x-axis. The graph shown below is a plot 55.cxi ibna6n -7mhyfof 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 duck flying due south forp y5 twc.v;zpq22, oxu the winter. At2u, x5 2;ytz.v ppoqwc 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 refer to the diagram below which shows the position000bobgl ggm c412 txu and elapsed time of a car starting from rest and uniformbxc0mg 20 4gl01ogtbu ly accelerating in 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 diagram below which shows the pouf+bsdt ls;98 sition and elapsed time of a car starting from rest and uniformly accelerating in a straight line. The average a 89st+l;dsubfcceleration 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 grw y*p)j ;oqe7uaph for an object with the position time graph shown in thu);pe *wq7joy e 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 tj1/ ub qpuguim8bp0qhv8 7bhti80 47ho the following information. An ideal elastic rubber ball is drop qi4umjqh 08 88hhbiuptvb0b1u p/77gped 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 eldte0lxk( (ue 4astic rubber ball is dropped from a height of about 2 meters, hits the floor and rebo (0txl e4u(kedunds 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 t0a j.y5 r(ly,nggdf1q7d,fl jravel 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 thfv6comk*; czf f(4ux6e 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 following scenario: A.o y tcw s/t+km35bnr1 4lp/fct $t_0$, 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 referslwrct:;3tuv: ycj - s/ 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 the following scecb5 h xs0ztk61nario: 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,i i:i9hg+c2ik do4:(k r mwg5l across a horizontal table top and off the table edge. Which of the following would w:k c+r ho iiml2(:i4ig95dg kbest represent a graph of the magnitude of the ball's acceleration vs time?


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22#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.01: The graph represents the relationship between distance and time for atg4p p4bn4lna3 v*g )cn object that is moving along a straight line. What is the instantaneous speed of3pt44v b4n nlgc p*g)a 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 bo ;5j m0vc2+g m(d xz*ohl6hpmem jr4/etween distance and time for an object that is moving along a straight line. Between what times did the object have a m lmj ro/+v em g*mhh20j z65c4d(xo;pnon-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 thrown straight do6zr ,c rk:qfp;wnward on Earth with an initial speed of 12.0 m/s from a position 10.0 m above tc;z r,:fqkp r6he 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 rest and un pzwa5n8+ m6 ufmg7+h3nq 3pdsiformly accelerati8np+w6asqp3uh ngm57z+fd 3mng across the floor. 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 represents a 9rik z5(eyou /toy car starting from rest and uniformly accelerating across the floor. The time and distance travek(r/u95y ioe zled 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 startingb3txzn +ov :)yn ec4-e from rest and uniformly accelerating across the fltvec) oz-xe 34nnb:y +oor. 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 a uniformly acceleratibwy3je 8iw 22et;()t )hmt)bfa ,wejcng ball. The position of the ball each secoi)wjbe;8j t 3 c,2h2ebyw eawtf))(t mnd 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 pwj );,fw 0j11zqd w(;aadtqc+dcbk ,dosition of the ball each second bzctq d;w wdj(;k, cdjwf)+1 q,a ad01is 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 uni).,no3jxtu vshj+gf 1. 1 z.oou+vpwzcycle moving in a straight line is shown in the graphjjpx.zz+.oo+ ,1o. f1 v)utwhsun3v g 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 c49g t)(qhvso eircus clown on a unicycle moving in a straight line is shown in the graph below. qh9)gs(teov4
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 v5 ziq5 o40ow*u0ieb por( 6r6ukesj9of 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 describ+sjp4 2sxtr 6ves the motion of a marble on a table top for 10 seconds. For which time interval(s) did the mvj4t6 x p+rs2sarble 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 tabl -hmfrb62ke7 ze top for 10 seconds. For which timebf2-r6mh ez7 k 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 descributa/ u:mk89ayes the motion of a marble on a table top for 10 seconds. What is the marbles average acceleration between t = 3.9m u:ktyu8 aa/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 acceleratesfw f:)njot *h. uniformly 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 withfb p+ 2m9xi(gc 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 j2c9v y7dle(t following graphs could correctly represent the motion of an object moving with a constant speed in a straig j evl29cty(7dht 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 accompanyinglskk2 4un6j0za::-(yjbf a zed;sr j37q gw +h graph describes the motion of a toy car across the floor for 1jnh6u:la j4bzssajqker +dz30k2 w: ( gf7; -y0 seconds. What is the acceleration of the toy car at t = 4 s?


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40#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.25:The accompanying graph describm2 f6u:y(5 z oci )m4-8tsgwmn+kornv es the motion of a toy car across the floor for 10 seconds. What was the total displacement of the toy car fowvms fty5):4mk + zucm-on2 6ngo(i8rr 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 motionu3yl)kcdivn*v -p5 /s0 y ca;w of a toy car across the floor for 10 seconds. At whaty idcv; *lpy/)a-u vc 30s5wkn times or time intervals 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 from 0 km/hr to 60 km/hr in 4gv ;xjua/lw +x 7w- qof(l1j w(d8ag+c.50 s. Which one of the following choices best represents the accel jfx-x(d/vllg+o7j8 ;wc1w(+a wqua g eration 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 time curl97yyhs1i u ov )duztwlx;8 .:ve shown. Which of the following statements regarding its moti9);i7wx8h1o y lsvuy.tl udz: on 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 velocity versus time ced ohock zuf7n1 1qkdl*q9ql p:38f :p-e41vsurve shown to the rilo*f9vp7q:1duedqn4 : ozefq- 3kk1lp 1sh8c ght. 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 hb g3tr7i( (uw,- dkhzj1fc*e7 lp6 symoved so that the 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 this interval of time?g 1he6 k*7(lfr -si3phb (7dcujw,zty

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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 kw- /bce fc v*ktta5p,/f(q 1ckilometers apart and traveling toward each other.c - qe/,/(a5 *vccb ktp1tkwff
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 th./a7 pj4xn6 ghebu x.gz/e*sce acceleration is positive and incres*ea6 x.gb juzc xg//p4n7he.asing

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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-e n,r)r;wfmon 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 two dimensions, which one of the f;j; yndx4n)afollowing choices identifies quantities that must have the same ;xd;y )njnf4adirection?

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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 movestr wws.5: 9 om*q4hyqtbgyr w5xr,)v9 $3.0\;m$ 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-ta0ibi xwv)7;o ime, $y\;vs\;t$, 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 alon -x5ius6/;cs2wm lwf cg a one-dimensional track for total time T in twwufm;56si x -2wsl/cc o 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 straight track il67kg 8nf mv.pia k.w7vh34gfs shown in the diagram. The thick line 8fgk. fk4 3pmi 7.lvnha6 g7wvrepresents 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 sthbd/n 1 j4 qk+csrq/d9j7(h motion of a car on a straight track is shown in the diagram. The thick line represents the velocity. Assume that jk1s h n4 qb/dt9hq/c7rs +(djthe 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 motioxl8jbfduh61ivn+n q) p . p23pn of an object given by the position vs. time graph shown. For wha.2 3iq)lpv8 nnh1p6jdb +fpxut 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 19 xtbpwd/c1k00i5lo s le(hythe velocity vs. time graph show1x(sw kl1lhoe0i9c pyt/b 5 0dn. For which time(s) is the acceleration of the object equal to 0?


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57#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.24: By computing the area under the acceleration vs. time graph for a mkndm-w(1a yy w7i vnc:-gjge/ /k.5lfixed time interval of an object’s motcgve w jy: n/k-ik7m-ay. 5gl1/(mwnd ion, 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 a9/qu4-fl(d 9atjrmz. ;tr jutlong 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 inous1r mr9cwg+,)f7 djlwk9p,4vquu; two parts:
Part 1: it travels a distance of 800 m at a constant speed of 4.0 m/s.
Part 2: it travels a distance of 1200 m at a constant speed of 20.0 m/s.
What is the average speed of the car for the entire two-part trip?

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.02:A small object is released from rest and reaches t-nxnf4y tk .h8he 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 release.ywsf/(1al4 ld llb4f d 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 graph of a particle moving along a horizolsid3yjr bf:ok 7( 6,pntal axis is sh: 6sybrjdof k,( l3i7pown. 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 thwr gf2b+4a.ste following choices correctly identifies all of the listed situations for which there is a non-zerot4 bf+gsaw 2r. 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 frvkh/ 9yf3w(line is shown. The object svfy r 9(h3kf/wtarts from rest at time t=0 s. At what time(s) does the object attain a maximum displacement from its starting position?


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65#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.17: An object starts at the origin and its velocity along a line vs. tilo2 kzio1w/+ nme is graphed. Which one of the following choices best gives the proper interval(s) of/io1l n+ zw2ko 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 movingvl 23wh*dhkqckdq/a-ll k14 8 to the right on a horizontal track, each with constant acceleration. At an instant of time, the informatioqa 1d 2vq 83hl*d-/llw4kkhkcn 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 aae51ctiv.8ox+ e 7qix 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 time shownf6 jo1g1q.gag 90ckyk in the graph, which one of the following choices correctly describes the relationship between the average speed of the trucy facggqk160k9 1o.g jk 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 t7o o4rm (1g9 u( 1f)t(f:qpzumeoq iathe instants of time, at which the car(igq: oo)te9 a7 1p utffmo(um4zr(q1 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 .t b3vf5s: ru r7s2 pq8qbojq9rest 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 relati5qsr.q oq9b u sp 87b:jvt2fr3onship 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. tix s8byh hdz;nbno3 +85iw 4xb;me graph of an object moving on a horizontal line is shown. At what time(s)58hib +x wd o;4byn3s8bzx; hn 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 position vs. time graph *8 lt7uq(psgh provided. During what time interval(s) does the mass have zero8( qht 7lus*gp acceleration?


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