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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 travelsl*f+evdkuq 8n+zb6+ z at a 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 distance per unit time withobub. 6w5ugpyb*,d * ksut reference to a particular dir.6 puyd*b5bku*gw ,sbection is 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 speed;) gg-rlrb)mi:,j s0:da eg: oftbzn 6 of 50 m/s andjbd e::z0 )),bator6srglm- gigf; n: 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 ve-h-s c +nq1agnxf j,voygc1+.locity. If it continues, h.gagn+1qf -h - cvs 1+cnyj,oxow far 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 plkj(utby*s e,b)j4 2gsank 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. What is the speed of thjs*b s2yu(j kb,t)4g ee plank relative to the pond now?

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  97.18: A motorist travels 400 km at 80 km/h and 400 kgo)c sgc2ks/6.4min ;eie m9vm at 100 km/h. What is the average speed of the i;2ie es4 6sovkcgn/m.)mg9c 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 motiof6:zes mkf bgh,,+0avn of a toy car traveling along the x-axis. The grapg,6hfv,z0s kf: abe+m h 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-axiqu 6dn9xrp1qoguesmt1 f.+4 6 s. The graph shown below is a plot of the car’g1 quef9dp1rtmus66x.qn 4 o+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 to the motion of a toy car traveling alon ypua53 td0hh8g the x-axis. The graph shown belowyh u ap08h3dt5 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 so;2)pmidz3 3w em t -xwq.upr9wuth for the winter. At what point did the dum xe)dw2wz.pi 93p3 rqm;-wtuck 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 belo7qk j f.;/rjqqw which shows the position and elapsed time of a car starting from rest and uniform q;.jrk fj/q7qly 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 zrb/mv7d zpi: ,pbx0 7which shows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. The average acceleration during the entire7b :/i mx7,zvpr zdbp0 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 gra pu/i+yilq94t e:xvc6(kapw ;ph for an object with the position time graph shown in 6+at9pu4kv iycqw/ :l( ;iepxthe 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 followi,h8 rlckz0tlrr -(+ o z;vj1qrng information. An ideal elastic rubber ball is dropped from a height of a-orzqc+ltv ( r rj1r,0k;lhz8bout 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(bx3q 5k,fadc ation. An ideal elastic rubber ball is dropped from a heig,d5( c3bfaqxkht 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 witp; ucy/p-kbbe, vzw :1h a speed of $v$ in still water, which of the following trips will take the least amount of time.

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17#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.01: The question refers to the foll*y4a4.q hg jynowing 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 sbfeli)p7s v ,8k. vobym;0h;d e,hnbw6 9m/ occenario: 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 z+*wk/nx( y1b4 bt( zhd ; ys0kezwz( amk5(wqto 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 sc:y+.y j vsges(5rzoed73 y+pl4uk-ro enario: 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 horizo(gp)4ml dxmk :af(5hq ntal table top and off the table edge. Which of the following would best represent a graph of the magnitude of the ball's accelek(:5d()ah4x mg lfpqmration 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 an ob, / :(upr mscvmlr abh wce8+;*u .*tb7m*lizfject that is moving along a straight line. What is the instantaneous speed of tumv/izaw(,c* b*clh8ps t ;r:b* u.+7emmfl r he 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 ,hqeda-i */+fsbo :f5 wy*qvftime for an object that iheq*,q y-fasvw:/f *obd5f+ is moving along a straight line. Between what times did the object 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 is thrown straight downward on Earthjql .e+y2mma;w v f;z+ with an initial speed of 12.0 m/s from a position 10.0 m above the ground. Ignoring air resistance, the speewy;qa.m; l vzj+me+f2d 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 l m0mnc qi:qr:+)ei 2nrepresents a toy car starting from rest and uniformly accelerating across the floor. The time and distance trm c : 2)q0r:im+elnnqiaveled 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 uniformlukx2c maj(+x-7 3 trfjy accelerating across the floor. The time and dist- jf ar(m32u7 x+jkcxtance traveled 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 7u (eje-4gny rrepresents a toy car starting from rest and uniformly accelerating across the floor. The timeure( eg74jny- 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 acceleratinrq;s(s*ng2q5;b qrc77ln kzjhqw5 3m g ball. The position of the ball each second is indicnr;77s ( z5qqkghb w5qrnml2c3jq *; sated.
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 accelg r4k2 wq9yzrz-huez/ 5n7 hm-erating ball. The position of the ball eacgqz- zw-ymrn/5her k4z 9 72huh second is indicated.
Which of the following is closest to the acceleration of the ball?


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30#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.17: The motion of a circus cwcxtn1l/) m i c3fi6s8pgn0/ glown on a unicycle moving in a straight line is shown in thf/8wn/sp)xlm t0i c n cg13gi6e 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 il iy3n.x, blg3u/ at(line is sholux/n .3at,gb3yii( l wn in the graph below.
After 12 seconds, how far is the clown from her original starting point?


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32#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.04: When an objecsv 9d-by jk);ht falls freely in 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 table top f/a-o: g//iab i jtoq.lor 10 seconds. a/aqj/gbl. -o:oi/it 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 n / y+qb t.+men,)os jm 89h4u0trmvl*jpnk u4the motion of a marble on a table top for 10 seconds. For which time interval(s) did the marble have a positive acceleratih0 .on+*)8j +tn me9lu uv4 rmjq/m, kspt4ynbon?


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35#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.13: The accompanying graph describes the motion of a marble on a tabl )za:x64ts:y7*7olp gcp vjmme top for 10 seconds. What is the ma7oxmps6a:p* g 74jy lz:)mtcvrbles 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 from rest for a time ofw-p(x5,08 cqt lu nqusb9-f co $2.00\;s$ 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, throw330macrdt2 h b c0*lbyn straight downward with a speed of $20.0\;m/s$, takes $2.00\;s$ to reach the ground below. From what height above the ground was the object thrown? Ignore air resistance.

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38#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  04.03: Which of the following graphs coojy n p o(1c424j1varvp+lb s-uld correctly represent the motion of an object moving with a constant speed in a straightavp1job +l j y-r1(psoc2n44v 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 graph describes the motion of a toy car across ti5c if*9dlxt ,he floor for 10 seconds. What isft i,59 *dicxl 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 describes the motion of a toy car acros9:g44gnkc8 bz lshf 2,rred +jpzld:.s the floor for 10 seconds. What was the total displacement of the toy car for the entire 10 secgnf h9rlg 4r84zdzpk+d,l bj :2c.s:e ond 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 floor :-b7cy-:fcszc9o kzw for 10 seconds. At what times or time iz-:y-c7ow:fcz9 cksb ntervals 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 m(c-zbw6n7 hk5a (bss 60 km/hr in 4.50 s. Which one of the following choices best represents th bszbhnc56w(kam(7-s e 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 timy pag:o *j.ym5e curve shown. Which of the following statements regarding its motion is NOT my*5ao: g.pjyCORRECT?


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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 velociyp,xo.dsxw 791q xal : -ni+9agcat c3a1np,jty versus time cu.q,a9aosdctyg7 lpxiwn c1aj +3na1x x-,9p: rve 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 (0 u*4xwk 73ymkuxvbwso that the angle between the velocity and the acceleration ofkuw40u7x w(3kyxv m* b 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 aparti: 1hfyod5x0m and traveling toward each other.1imf d0o:5hxy
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 acceleration is positivaro9ekul -yi k 4)w:7re and increasiro-4kre9)wai 7l :kyung

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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 czjfngfn7(l)b bq( x +bw h/o351j*tbn 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 followin2j+k- fv x4.z95 l:wnisjmshya3lhn; g choices identifies quantities tha:4 5sa-;lv lk39hjwj2hm n inf.sx+yzt must have the same direction?

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50#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  09.17: A toy car movq*h : :o qa/w)r5(l p6eextpkees $3.0\;m$ 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-tim* / 5oe,ef4i- dtr:olh fdea.rtr8v y8e, $y\;vs\;t$, 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 irc;nv(au(c7gnn / x 1ygcs(25zhz*rtrack for total time T in two parthc*a;n2v1 (zc r(sci5/ 7nrzyu(ngxgs.
• 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 stra8op *cyof vrlfl*7 l0:ight track is shown in the diagram. The thick line represents the velfpcl07oy*f8r:l*vo l ocity. 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.r us)) easuw d(.b hpf--65iqo time graph for the motion of a car on a straight track is showi hs fo -6b(r. u-)suawq5d)epn in the diagram. The thick line 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 motion of an object given by the position vs. time grfdwzuf,a*;iy ;;3 zqh ) v1afiaph shown. For what time(s) is the speed of;3 iud z;yf1f,vqz*waa)i;hf 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 +iov1cd l z-v(motion of an object given by the velocity vs. time graph shown. For which time(s) is the acceleration of the object ez c+ -od(vvi1lqual 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 unde 9) ;uvjhj22i7a gdrrer the acceleration vs. time graph for a fixed time interrj) g29i j r7e2u;davhval of 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 a horizontal line with increasinj+oq 7b vfeo:+ vh gxygth-.3 re,u)h(g 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 partsrpw qzy,h :v)+bkl :e1:
Part 1: it travels a distance of 800 m at a constant speed of 4.0 m/s.
Part 2: it travels a distance of 1200 m at a constant speed of 20.0 m/s.
What is the average speed of the car for the entire two-part trip?

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.02:A small object is released from rest and reaches the ground in a time ,lqw5vbu nd26r p*q c(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 reachel3rcum-i,kf o/u og6 msi)d*- s 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 par4:pehcqhe * h9 k1jfz0ticle moving along a horizontal axis is shown. What is the total distance traveled by the par*ep 0hh jqk1:fh4c9ezticle 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 of the li ,,nbb-cb6c.s. hm h9y- wlshwsted situations for which there bs6.h-l9 whyb ,-,whb.c m scnis 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 t3ppskw*eoiu7;8 ttuot x k0 -4 /xam9object moving along a line is shown. The object starts from rest at time t=0 s. At what time(s) does the obje0t7ms ;*poxwx8/ik4et a 9pu 3utkto -ct 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 alongqw 2ug+;z- 1/cwftzww a line vs. time is graphed. Which one of the following choices best gives the proper interval(s) zwfww/12 ;wg tqc -u+zof time for which the object is moving away from the origin?


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66#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.09: Two cars are moving to the right oy zek0e z4rin//vdt 7zso .)h*n a horizontal track, each with constant acceleration. At an instant of time, the information ab4 z0)rzeidv *. 7eyktn zh//soout 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 : gno dkqbp rea1m5/i8+2fd7j a 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 shown/jf,cbln9t+ e1y drzf9b1jc- in the graph, which one of the following choices correctly describes thee 9zjj+-1cn9/frt lbdbc, 1fy 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 describes the instants of tibdnkudm ((z+* me, at which the car and+* nbuk z(md(d 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 rest at the origin and will9flqcyd :z() q move along the x-axis. The acceleration vs. time graph for each car is shown. Which one of the following choices correctlq)9fz qd ly:(cy 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 b;as q8+js3qm moving on a horizontal line is shown. At ws sqj3m;ba +q8hat time(s) is the object moving with its greatest speed?


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72#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.08: A mass moves along the x-axis following the posi8ke xgbvni25) tion vs. time graph provided. During what ti)xi kv82 nb5egme interval(s) does the mass have zero acceleration?


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