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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 .heqi:3: 6 4oaa dbbkvaround 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 51wyzvj e4ds-( 5cfm zg w f)nq7mh05qtime without reference to a particular direction is cegs f5wq nzhf5zcjm 7q w51-0 4)dyvm(alled

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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 speedkckr/ nhh m/:by0lz8 9 of 5y/0 rz/: blcmkkhhn 890 m/s and then completes a 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 1.0 s at the constant velocity. If it continues+r + yldtw1r ajp -:u6l9w0wel, how far will it t6drl9l rt0+:j-y+ p a 1lwuwewravel 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 io2rq*y/( h7wu8ep h*)-+)q sp c; y rboupvsdas stationary 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, relative to the plank. Wh2;s7*rh- )op(h oq/d+ wep qrupc yyv8)b sa*uat 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 anjs59;a1p ,y gcwn ad9zd 400 km at 100 km/h. What is the average speed of the mo yz9,nwpj59c a d1;agstorist 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 rbq72 0bfynq:g -hkml1 efers to the motion of a toy car traveling along the x-axis. The graph shown below is an b1hl: 7 bgykmf-02qq 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 ref0b 7ovjn 1wu9xers to the motion of a toy car traveling along the x-axis. The graph shown below is a plot of o70xbw9v1j n uthe car’s velocity in the x direction, $v_x$ versus time $t$.What was the acceleration at 33 s?


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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  97.22: This question refers toq5x se q;m0xi4 the motion of a toy car traveling along the x-axis. The graph shown bqeqx4msix5 ;0elow 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 duck flying due south for8unh,x tsj4 ef;:2wqh the winter. At what point did the duck s tfeq,wj n;hsx2h4u8:top 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 kh6yhm)7 sr:bzcu: k/the diagram below which shows the position and elapsed time ofr)y m:/sz76hkukb :h c a car starting from rest and uniformly 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 9b-gtdo y)-qveis83rb uuns5 / u3hn*which shows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight l nust*3u 9/h)bgeq-- ivru3n8obds y5ine. 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 grapknd:/eqf(:l* cijxkyvc *(4 yh for an object with the position time gryin:4*y j : / (cfevdq*k(lckxaph shown in the diagram at right?


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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  00.28: The following question refer to the following infodx*vwki0qc 5k5oez4 9rmation. An ideal elastic rudkx 0oi9c* 5kv4wq5ez bber ball is dropped from a height of about 2 meters, hits the floor and rebounds to its original height.
Which of the following graphs would best represent the distance above the floor versus time for the above bouncing ball?


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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  00.29: The following question refer to the following information. An94otpzsze:a9wu * wk7flqs -) ideal elastic rubber ball is dropped from a height of about 27k w-*f 94 9pteqloszasw u:z) 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 tra7 hwt 2k,.g3x vttc/al19xpu gvel 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 xbaz; rm-fzrch ;:8r3 jl+b g3the 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:nf-c x9 sg1r1b 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 followir,u3 3s q::ho, dg 5wmi,vtt6rajn;vtk3ok6fng 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 scz)ijtt ql *./venario: 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 ow;qhxm-* z*wpc* 81v ub//noxl z*sbo ff the table edge. Which of ozc*/p*;mxsnqw* l1o-b xuw/h8zb v*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 represents the relationship between distance z+ 8 hd+sga zu/ul9kj,and time for an object that is moving along a straight line. What ilguj+h8 d/z+9ksa, uz s 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 tqc gra;:*ab: bts ;1jjime for an object that is moving along a straight line. Between what times did the object have a non-zero accelerat:rg1cqjsj b; b t*a;:aion?


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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 downward on Earth with an inrs5 w s qq0zi73-*riojbj7i,pitial speed of 12.0 m/s from a position 10,irjij0 zo*s p5w377ibq- qs r.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 b a5a w(o5zd;zv 2wdly1elow represents a toy car starting from rest and uniformly accelerating across the floor. The time and distance traveled from the start are shown ina5wly1zv(2d5 zdw;a o 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 represen 5)fzfsw vg.uq97oc4 kts a toy car starting from rest and uniformly accelerating across the floor. The time and distance traveled from the start are shown in the diagram.4fs ocvk9g7w. zu5f)q
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 reprrtz5c/3 )szm54v)g ( hcteqsyesents a toy car starting from rest and uniformly accelerating across the floor. The time and distance travel)rzh5cztseq( 4m y /vtc 35sg)ed 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 unifovy8l 0 a- zu3b0u9fc-xdf4gfj rmly accelerating ball. The position of the ball each second is indicated0 yfbv03-ulcx49jz d 8ug-fa f.
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 positipwk, xtgd 17 qh)hx zht35+4soon of the ball each second is indicated.1,h h 7 thk4gwxqzd)xs5p3+to
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 straight line2cvd9rd zw) ob) b. smypo5k9k5l-8vk is shown in the graph bel)kdov 5b- 5k2lcrz9 omd9pv ykw)s8b.ow.
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 inz 3u9mb x9o4d0 bsmv.n a straight line is shown in thz49 xb0d9n smvb3mo u.e 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 awbojse;rkomp7x1 r7em qi, *61b y5:u 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 mot zi8jp/u g.j,5cfhn fw ;6x)cnxm5qe e5jw6*wion of a marble on a table top for 1u w)hxzw*jxpef6/q5jef56 nm i. 8;gn5 c wjc,0 seconds. 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 cr6b5d+5djzo/ncqn4 marble on a table top for 10 seconds. For which time interval(d4nn q+5c 5rzcjb/o6 ds) 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 offtr+/ps lk r7zl. (2qc a marble on a table top for 10 seconds. What is the marbles average acceleration between t = 3.3 s and t = 3.8q clr zfpk7/.s(2 +ltr 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 from rest forv v1hel5x3v r; x*g/gkj1tm i: a time of $2.00\;s$ through a distance of $4.00\;m$. What was the acceleration of the car?

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37#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  16.06: An object, thrown straight downward with a spy 86 druua01 hc1pvi0weed 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 fol kwz-/wf, )ypv p56ubtlg h,g rd98w-xlowing graphs could correctly represent the motion of an object moving with a constant speew5trg wvk-p 8/-h,u9bp6zdfl)y g x,w d 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 accompanyi0 c7d3/qk2)9 dp betufgps-kyng graph describes the motion of a toy car across the floor for 10 efkk3 s907b d) dg-cytq/2uppseconds. 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 grar w j/99svc)j5vmmv:eph describes the motion of a toy car across the floor for 10 seconds. What was the total displacement of the toy /jc99j5)vev r:msw vmcar 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 of a toy car across the fq dst5z5js /kin /l;7uloor for 10 seconds. At what times or time intervals must the net force on the toy c5s/jqn5zdl7; / ituskar 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/lp*tfm5ax s: p6r:1cm 7lt uajo+ff3n9 + va1ehr to 60 km/hr in 4.50 s. Which one of the following choices best represents thfc p+ 5f1:* am 6sotf7p3envm9 luj:lta1r +axe 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 veloci8q )e)( ba66ysykg. 7papcd tgty versus time curve shown. Which of the following st7qgey6ap8c6() ktp )yagdb .satements 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 accorp d8g+ ug.d+zzwa;mq8ij( z1ading to the velocity versus time curve( q w uadggz;z8jim1zap+8d+. shown to the right. 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 the a5vx a4j )wwrf9ngle between the velocity anr 9v 45fajww)xd 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 are 150 kilometers apart and traveling toward each 2chq0y(dq fc(other.y2 dcc (h(0fqq
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 mo,w wfl 06jwe p-syv1fi 5jw0v5ves on the x-axis. When the acceleration is positive and increaefl v1j5 f j0yvs,w5-0pwww6i sing

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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 byxmi5iy(,uaicx ; :k03i 2g saverage 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 followiniqqq7 0ql9(eg 46tq ldg choices identifies quantities that must have the same directio 4ql7ti9ed qqlqg(0q 6n?

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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 movesxzwwc 19k 1u 5.kf(f*xa2o t8sehlg 6v $3.0\;m$ 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-timebve2r+ /a7ak x8c(lcq , $y\;vs\;t$, 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 onvb/c9gi5qs8h j ogb3 s2ablv;-e*(nv e-dimensional track for total time T in tw5inv b ( -*vhl8 vb3gca gb/9osjq;e2so 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 strai4 yfe y)y7s-bopob f1b9xv8d:ght track is shown in the diagram. The thick line represents the velocyb e:41 f7ypovb)xyos db89-fity. Assume that the car starts at origin $x=0$. At which time is the car the greatest distance from the origin?


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54#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  08.24: The velocity vs. time graph for the motion of a c)kh8bee u9nc)*8h esb ar on a straight track is shown in the diagram. The thick lineehb)ehs*eb) cu9n8k8 represents the velocity. Assume that the car starts at origin $x=0$. What is the average speed of the car for the 10 second interval?


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55#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  09.08: Consider the motip-;q:q cv18p 2kbk u.xevyj1mtwf (4don of an object given by the position vs. time graph shown. For what time(s4kk.c1dm xy:(8 fpj2v-p ev;buq qtw1 ) 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 mk0 pogps ;q)uqc7i;+ cx f4cv,otion of an object given by the velocity vs. time graph shown. For which time(s) is the acceleration of the object equal xc+0q; kpvocci7,u4)q f;p sgto 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 graral9lo8 ,ou/e8w qt,o qy1,xtph for a fixed time interval of an object’s motion, what quantity has been determined for ottoxlwy8ea,/ l9,1ou8q, rqthat 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 horizontmli( bah/zrok u j;.;8al 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 parts: i9uwaq)f7u,v)k,l bp
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+38qo tgcy;zm(w93jce+tql9 cu 0er o 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 3wpy/)pxc 3vv vz y7,ris released 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 afswx vz hkq 61)cr594g particle moving along a horizontal axis is shown. What is the total distance traveled by the particle from t=0 z4krxgc51 qfv9 ) sw6hto 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 th8lxl5iykra z7*0d fe7e following choices correctly identifies all of the listed sitdl f 7e80z7*a5lryxikuations for which 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 acceleration vs. time graph for an object moving h sb +3s+ntx7xc9m1sd8fh f e9along a line is shown. The object starts from rest at time t=0 s. At wh1x9bc9ffd 8+s x+hhms 3e7stn at 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 qybo9zm jpgvdp 9,)ni ,+t2h 1the origin and its velocity along a line vs. time is graphed. Which one of the following choices best gives the proper interval(s) of time for which the object p 2i1t)n9 dzyh9bqp,gv+m oj, 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 track, 7q(98t.d qbez vt t-keeach with constant acceleration. At an instant of time, the information about.tq 8et(kt7 9 vbqd-ze 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 positionzkua+go6d+c4nk uu;kjs : z26 $x$, 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 ,v n0 wb:sox2ushown in the graph, which one of the following choices correctly describes the relationship between the average speed of the truck to that of the b2s:,ovwu 0nx 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 describesj7ve1)7 8wwn9kml9 cwha*z bf the instants of time, at which the car anl* 9f1jhzw9 77bw ekmw8)vacnd 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, e8d, kb-hthy- apo f:g*6oiy2 each start from rest at the origin and will move along the x-axis. The accelerationh o 26pbtayk d,f-o*iyg:8e-h vs. time graph for each car is shown. Which 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. timowj nq: x*.ug 0e9; xqdgbk)o4j k18moe graph of an object moving on a horizontal line is shown. At what time(smjux;bd0ko)9g. g:4okq je8*xq1wo n ) 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 alo +lwvz.hvtf. 4e +hf/nag)x*mqp5cn-ng the x-axis following the position vs. time graph provih+c mv* t-hgln+ezq.v5f 4pxa w)/f.nded. During what time interval(s) does the mass have zero acceleration?


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