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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 speedt4nezwd 634 ux 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 distance per unit time withobm+;u ):iz8xa;46kekr qbmia ut reference to a particular direction ;m4:bmxiur;qaz +k6 )e k8ab iis 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 an average s.wal 2hl )4sm9mz:oc upeed of 50 m/s and then completes a second la4z)cm2: sa.9hum wlolp at an average speed of $V$. The average speed of the vehicle for the completion of both laps was 80 m/s. What was the average speed $V$ of the second lap?

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  95.03: A toy car moves 0.80 m in 1.0 t0tg u4z ;w6sc6v:nres at the constant velocity. If it continues, how far will it travez:;v466tucte sw0 ngrl 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 stat9n g ounr2f x+df:9a-pw,mnb)ionary 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 walking on the plank at a rate of 4.00 m/s to the left, nn2w9porb a:df),fxm -9ng+ u 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 travelsvbz1 2h ehtx no10(tk0,l;erf 400 km at 80 km/h and 400 km at 100 km/h. What is the average sp0,2txn1e flt obz10;vh he( kreed of 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 thd1; . vy1y xx;sy6cdkqe motion of a toy car traveling along the x-axis. The graph shown below is a pxy kyx1;cs6y1 ; ddqv.lot 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 traverp4ij3 1sk bt2ling along the x-axis. The graph shown below is a plot of the car’ jsi3t1 kr2b4ps 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 toy car travell-mmf7zy4ch neglt+. o 8e9 ,ning along the x-axis. The graph shown below is a p8-h ltlne ofcm4g9m7. +yze,nlot 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 duck flyi714 q s heyq*u98cdiibng due south for the winteeui7yq9*8 4ibd csh1q r. At 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 shpu-ymb8u9 sh* 8mvx6r ows 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 86xb* -vh9yup 8mmsrucar 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 posi7i h in cakax7z0+2tp i5o-.ghtion and elapsed time of a car starting from rest and uniformly accelerating in t k+acoa27h.5niig-i phzx07a 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 sh z z+ta5na3vl1ape of the velocity time graph for an object with the position time graph shown in the dvlt5aa3n zz 1+iagram 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 p*wb7tn/k3hsa bo*6 z question refer to the following information. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor and rebounds to its zapo** s/w 3hbk7tb 6noriginal 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 rk b8bc/x e42dckf*eo :efer to the following information. An ideal elastic rubber ball if/c*x k c8bk eo2:d4ebs dropped from a height of about 2 meters, hits the floor and rebounds to its original height.
Which of the following would best represent acceleration versus time for the bouncing ball?


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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  00.39: If a boat can travel with a speed ofacbv72hei *5uzuqd .5t. hp :d.op+ue $v$ 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 scenaonr hmjas1ziy8h1:6 x0 30tkurio: 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 followingt1 1,aonsl6 npv j+1ng 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 rec* x5g aribfo5fd;+u-fers 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 followin--l qvh.6-7ltjuu cocg 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 thfh) /.;ckzbv5 g t:.tbja8f gre table edge. Which of the foll;ght: fjvrt5b)c8k a z/b.gf.owing would best represent a graph of the magnitude of the ball's acceleration vs time?


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22#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.01: The graph represents the relation ij ujz,wpk7c st6pb3bn8o 2lrq( u897ship between distance and time for an object that is moving along a straight line. What is thejks 7p3tunzrc(j8oi7,l6 9qu82bp wb 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 rg2 x/ k iiog*47afo-unelationship between distance and time for an object that is moving along a straight line. Between what times did the oboxn 2igif-/4o* ak7 ugject 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 0pt 1lcog n/+*c 3f16sbkhl vkt1rci/is thrown straight downward on Earth with an initial speed of 12.0 m/s from a position 10.0 m above the ghl13/ct0 gif 1b+ rno *spkct1k/c l6vround. 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 uniformly ahx r4g :pv9o5xccelerating axp:9vh x45gor cross 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 toy car starting from rest and uniforamb(7y ,z uoq1ya)v fuh7l q*2q/f2yzmly accelerating across the floor. The time and distance traveled from the start are shown in the duf77ua ybl1h(,m)* qq2fzyo/a vz 2yq iagram.
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 startinweqdnzcf( gr 2;h*.*gl1u uq/ g from rest and uniformly accelerati1 *(n*;/ uq.wfhl2deurcggqzng across the floor. The time and distance traveled from the start are shown in the diagram.
What was the instantaneous velocity of the cart at 96 centimeters from the start?


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28#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  04.08: The diagram shows a uniformly zoc aqa*,, .xxaccelerating ball. The position of the ball each second is ina*, ozcq. xxa,dicated.
What is the average speed of the ball between 3 and 4 seconds?


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29#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  04.09: The diagram shows a uniformly accelercv:0*f0llr5vb+-nvxyww9 mmeh ;) o rating ball. The position of the ball each second is indicated. vlrm ex+nl -9 ofv)5rwh;y:0* 0mbwcv
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 circusu-qf 3u y:mx)3pi0.a(owz nj/ug i2 gt clown on a unicycle moving in a straight line is shown in the grap oq p inf x.2/g0-:a(uyz3ujw3t)gi muh 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 unrk:h ud 0t1t vvn/(8snicycle moving in a straight line is shown in the graph below. r(n 0kd/ nh:8 1vttsvu
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 p7;bj/ 6zi7jgr yqf 3nin a vacuum near the surface of the earth

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33#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.11: The accompanying graph describes the motion of a marble on a ta(os+o hw ./-d1b 34qjimeuo0fywy p y:ble top for 10 seconds. For which time into 3d -y1wf.j: hyu(+i/ 0byqs m4eowpoerval(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 top foomk ib)9e (dii 01a,sir 10 seconds. For which time interval(s) did the marble ae,i bisodii(m 109)khave 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 2z)la8nr fcmiik-j6; marble on a table top for 10 seconds. What is the marbles average acceleration between t = 3.3 s and t 6jf2mi kz8r;)a -lcni= 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 r) 4ru 75t4as zsk1omefrom 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 straill zqvk2 1* *.y6isjmpght 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 follov1 a( ,ynu-f k5zxy.qkwing graphs could correctly represent the motion of an object moving with a constant speed in a straight line?vk .f1,ny ky quz-xa5(


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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 motjrww); +n3s)dnw b-j hion of a toy car across the floor for 10 seconds. What is the accel)3;bn d)hjr +jwswwn -eration 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 1kh/et l(3cgef t 61zomotion of a toy car across the floor for 10 seconds. What was the total displacement of the toy car for the e lg6 tfe(1tk3h/e1 czontire 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 across thcomojf5y(d la .l+g7q zv--:re floor for 10 seconds. At what times or time intervals must the netvj-m+f 5g7zldq ry.oa o(l-:c 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/)n mv5eqq s05**j 4vkb9e ajbuhr in 4.50 s. Which one of the following 5jvqqmse054 n 9ek) *jba vbu*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 versus time curve shown6kh0zpx*u x, aby6hra1v d2p6 . Which of the following statemedp,xbz0616hvp* kuxr6ya a h2nts regarding its motion is NOT CORRECT?


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44#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  07.17: A toy car moves along the x-axis according to the velocity versus t 7odgu 4qielm6e0;6r rime curve shown to the right. When does the car have zeromorud4 0;g i 6rl7q6ee 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 the angle beoq5llu*2,zp9-sylkgd / p;s y4fw ar7tween the velocity and the acc2 9/4f,qzlswk r*ydoy lugp p5las7- ;eleration 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 are 150 kilometers apart al gnszoaj 5x19g4ah)*m:jdo ;nd traveling toward each other. ml5j:hg;*nj zaaog4xd19 )os
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 mov:.y8 a,vx bvcies on the x-axis. When the acceleration is positive and increasingby.vv8 :aic,x

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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 avera:fe m9dns1s/ qge 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 onk(-*9exwjtykcpg- yvv. m9. ie of the following choices identifies quantities that must have the same dir -imv -tv k(y.jeg.xwk*9yp9cection?

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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 movl8msw3a2 qk; ,irr(qaes $3.0\;m$ 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-timjj up;1 xqin+-scw;h q3 9be+ye, $y\;vs\;t$, 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 km fr-t jg4,n,right along a one-dimensional track for total time T in two, ftg -r,m4njk 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 au mzx:x( cvpr 4cz,a49 5smk.s straight track is shown in the diagram. The thick line represents thzck.sm:5( mxps44, axru vzc9 e 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 thvmh;12c- ydokla-j./zdcq s9 e motion of a car on a straight track is shown in the diagram. The thick line representy -dl.2o scj1amd z/h- qkc9;vs 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 the0d2iqh6uk 1px ,m)m yu pmzfuu4(w:0l position vs. time graph shown. For what time(s) is xmzum)u2fdl0mk0 u6hp1iy4:wp (,uq 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.bl.om(z u2rn:74g lcj time graph shom lg 47r(b2juzl:nco. wn. 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 unqk5l pi3un u(b-:5gn o2lh7 dxder the acceleration vs. time graph for a fixed time interval of an object’s motion, what5b- l:n2qu3 dgpni7x5l ou h(k 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 zx 2d+6 fnn-hwalong a horizontal line with increasing speed.
choices could represent the signs of the velocity and of the acceleration for the object to achieve this motion?

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59#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  11.14: A car makes a trip in two f .fxt(tw/rzz(:m p -fparts:
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 rep2 b++ jlztjz(i;3o z;roh4weleased from rest 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 8(cscntc i*az ,;w.mr 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 hormdyadgngmfv-5ieu*1- 5 )dl 3 4rap:jizontal axis is shown. What is the ti1jd:vemnp- l)y m5urdf -4a*adg 3g5otal 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 correctl1ersfccf272q t 5gg+3u ncl)dy identifies all of the listed situations for efq72n5rc+1gu d32 csf gc)tlwhich there is a non-zero acceleration?
Situation I : A point object moves in a straight line with increasing speed.
Situation II : A point object moves in a circular path with constant speed.
Situation III: A point objects moves in a circular path with decreasing speed.

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64#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.32: An acceleratio,0e 7i62uzqx:w visoin vs. time graph for an object moving along a line is shown. The ,:2vi 0w6ux eszoiiq 7object starts 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+g0: rv-v (yqpr*vgvrv wjq/mz23j d- vs. time is graphed. Which one of the following choices best gives the proper interval(s) of time *20rp/qv-rrzvq-mv+3 v dgv gyw(j j: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 i/ nb cg .tydtsj*wv19 1yj*lznf270nmoving to the right on a horizontal track, each with constant ft7*swb029 vt1yl c1dj i/ynnngz.j*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 nwwg9g(xmdc,l dn 439on $x$, 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/it5 miuod)(-k*hkyl time shown in the graph, which one of the following choices correctly describes the relationship between the average speed 5d-/ouith ly)*mkk(i 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 foazxa6n b jp3z +e9t*g,llowing choices best describes the instants of time, at which the car and truck travel with the same s,3 xb+ajt nz6z* e9apgpeed?

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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 origin and will move a--4:ncx a h2klt0 hxfxlong the x-axis. The acceleration vs. time graph for each car is shown. Which one of the following choices correk:-2l0 4hxfh-a cxxtnctly 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 line u6u7- t6*tweolng.v ptr -0zqis shown. At what time(s) is the object mortve7t- 66n.og- uqzl *tpuw0ving 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 tu akhh:kuh,0 gtvfy 2-)w13x khe x-axis following the position vs. time graph provided. During what time interval(s) does thkh1thaf3xg)kuuv2:hw,y - k0 e mass have zero acceleration?


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