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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 speed around a circular pat2mu(ex c( c2(tur qup*h 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 tclm5vi ,l6v0qclpi+, : w pb*without reference to a particular direction ivlibp0plcqim,v l5 ct* ,:6+ ws 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 5 ck d roc/6pxo);8fgbof 50 m/s and then completes a second lap at an averagr/ 5pkfc )ocb 6;8oxdge 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 v12ejnfx9m z 2 (xrj+rt0yj l*melocity. If it continues, how far will e 1rx2+fjn0zty*j(rmx2lm 9 j 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 i:; hpiwb d;h:gs 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. p bhg:; i;dw:hWhat 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 / pxtb* o 9xn88.rnsrpt9osjd) l 3cu+80 km/h and 400 km at 100 km/h. What is the asn cj 8os. + *xr9l9to/ n8tbpd3prux)verage speed 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 the motion of a toy car traveegd5 vh 08 j52lnm5:tyg/yqw sling along the x-axis. The graph shown below is a plot of the car’s velocity in the x direj/ 02 qmgtwh5ldgyn ye85v5s:ction, $v_x$ 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 moti:oxdutb -nhv, 5nvi)x +v*g+oon of a toy car traveling along the x-axis. The graph shown below is a plot of the car’s velocity in the x+:o ,5x o x)*tvgvn-ibnu hvd+ 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 mot x:ta zsli .b sdrle)o+61x/m,ion of a toy car traveling along the x-axis. The graph shown belo:a6,tlxz.1/d ix) +bro ssemlw 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. tmu1xsan ( 82as )dxjl4ime of a duck flying due south for the winter. At what point did the duck stop its forwxa)4n82s udx1 j(lam sard 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 showsh2atr*x 0 pd+m the position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. What was the average velocity of 0+p2*mxr dah tthe 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 to3u g7l tb1*dqo the diagram below which shows the position and elapsed time of a car starting fro7udb1q3* g tolm rest and uniformly accelerating in a straight line. The average acceleration during the entire 3 second interval is closest to


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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.20: What is the shape of the velocity time graph for an object with thev l,aex88bv4fv p w+3drd -nc5 position time graph shown in the diagram3n8+af, w8ldcpx4d- rvv bv 5e 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 u.9i 4m8jd82q +hvhiu jisi.fy m+p.j question refer to the following information. An ideal elastic rubber ball is dropped from a height of avj8u8.hsm+i yj qpd.49+ij h m2iu. ifbout 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 qc-5o 5 hv-*vvmk xzjn q)4q)otzp61emuestion refer to the following information. An ideal elastic rubber ball is dropped from a4 hovz)e nm jq1 c)5 o-vx5q-pmzv*6kt 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 witko1 sj0mtb*l-t4svy8 f6x4w85l rbz sh 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 following scenario: At bfwark l e :vha8/;7)i$t_0$, 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 r ti.vq 7t6rns m 5g ot*e0+snnngj)6f-efers 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.
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 rl r4nbfbv)-*t; e hnn ,99mpbdefers 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 tv85.j5 1goj 2nw ih-aorjpcv:o 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.
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 r q3kmfot //c lvg; a69q2-xmc*( mle xj3yg9qmolls down a ramp, across a horizontal table top and off the table edge. Which of the following would best represent a graph of the magnik2lx3 co/x-qqe9*;j qmy6gtf g m/av cm3l9(mtude 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 represmzf fywb02-w.9k b+ufents the relationship between distance and time for an object that is moving along a straight line. What is the instantaneous speed of the object at t = 5.0 seconds? ffwzfyw0k.u92-bb +m


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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 dist3z fxwc-ea34 gance and time for an object that is mo34fwzgx- 3c aeving 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 6*6qx .htvpuzthrown straight downward on Earth with an initial speed of 12.0 m/s from a position 10.0 m above the ground. Ignorihx u6p6. qtvz*ng 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 repr*b8hopzn k0 6hesents a toy car starting from rest and uniformly accelerating across the flo0 phhbko*8 z6nor. 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 represen)bjs ikf5im l2es42)+ z9lta sts a toy car starting from rest and uniformly accelerating across the ibeljls 9)fs5s+ m2ik )2 atz4floor. The time and distance 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 represents a toy car starting from rest an1a9,.hbty :fiew7j2( 2 to7a xyvnyd od uniformly accelerating across the fd y2hbyt2x ai ot:vwfa9 77nye( .oj1,loor. 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 acce uwd 4r-ym+/bpk:1 hxplerating ball. The position of the ball each second is indicatr/p4 kmpu:dxw-y1hb+ed.
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 u-r 4odlr.d- vgniformly accelerating ball. The position of the ball each second i4l-dvg rd.or -s 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 unicycle moving in a straight line is s.x)e (ap1. oeml n*ntwhown in l.p * wne()m1at.onxe the 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 unicycl/* z9 vh(1kvxrz lwxc6f -y8use moving in a straight line is shown i/cvs1x9u zvzk-6rhyx wf8* l(n 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 object falls freely in a vacuum near the mg7bny 4vo0rm y nx0/0s.nid4 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 graj /s ayi3f3( .7 f+g6dpbz o9xf0neh2ylhnv)zph describes the motion of a marble on a table top for 10 seconds. For which time interval(s) did the marble have a nnj(f 7l 69yzfn)e3hv 0g z da 3+osfbh2.xyp/iegative 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 qmn2 vl9za2es i)8 k0xmotion of a marble on a table top for 10 seconds. For which time interval(s) did the marble have a positive accelerat0nams2kq)lve9 x2iz 8ion?


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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 02g/lcqz nq .l 0 j2sr/j+ximlon a table top for 10 seconds. What is the marbles average acceqg z cr.j02xm02/i+ l qsn/jllleration 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 unifoyq2bmy g51 iy1ax4t:ermly 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 downwardr,sk7rc6cyuh6i al 6qc -- gybl2z ln(xu q9/+ 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 could correctly repr 2 kbwpd,67uiv 40o+ eorpoz 5;yk-a9lm hrg,jesent the motion of an object movindo wl7ahkvj56 i-4p yg0,bok29zp e; rruo,+mg with a constant speed in a straight line?


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39#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.24:The accompanying graph desc1nl;: s9am u.aqpb(m kribes the motion of a toy car across the floor for 10 seconds. What is the acceleration of the tq9au:kl1;s (npm ba.moy 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 p-+t rh 1an. .di4ijuvdescribes the motion of a toy car across the floor for 10 seconds. What was the total displacement of the toy car for the entire 10 second interval shownu rndit1j +i-va. .ph4?


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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 motion3x;v;6mjl2vufjw 1lz of a toy car across the floor for 10 seconds. At whatz wxv; 2l f3muvl;j16j 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 uniform7-:zi3vxp k-9epgm+9wwfeu6bt wn . jly from 0 km/hr to 60 km/hr in 4.50 s. Which one of the following choices best represents the acceleration of the ca mnb zvp97:x- jw ptwk3wfie9+6 u.-ger?

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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 velocityb-e l+b 9gqlt4 versus time curve shown. Which of the following statements regarding its motion is NOT 4lbgebq 9-t +lCORRECT?


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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 vel *xk)cz.ro 5esocity versus time curve shown to the right. When doz x5re kc.*so)es 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 ang zm; sig-jpvs( kp23+d 7htxq2le between the velocity and the acceleratk +jvt 3(xiz-dq ;2 ss2mgphp7ion 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 to8x j ih/5.vypjward each other.jy 5j /xvhp8.i
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. Wh+13nqh hg/rqa en the acceleration is positive and increasin1qrh3+nqhg a /g

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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 aveg,k4w2wl v w/lrage 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)zhsw a0d//( at3 coli of the following choices identifies quantities that mustcit os/h0a(dl/)waz 3 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 movrs:t:6,;igj j8*iheej wu /fees $3.0\;m$ 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-time, d2d q09*u6xwk kzeh+5v:o44fhjsdjj $y\;vs\;t$, 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 onezks:ne-x1c /o xeb(v; -dimensional track for total time T in(se- v:oxxn/b1c e;kz two parts.
• Part One: The car maintains constant non-zero speed V for the first $\frac{3}{4}$ of the total time.
• Part Two: The car accelerates uniformly to rest during the last $\frac{1}{4}$ of the total time.
What is the ratio of the distance traveled during Part One of the trip to the distance traveled during Part Two of the trip?

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53#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  08.23: The velocity vs. time graph for the motion of a car on a straigh*v vd.rv1j q;n w-la n8saq26ht track is shown in th v;w.arlqsv vd6jn1n2 -a8q*he diagram. The thick line represents 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 motion of a car o8yz ttgo; *w,hn a straight track is shown in the diagram. The thick line reprg;o,tz8 hw* tyesents 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 rk5i t6n5wdfe9o 1b w)6(qa snby the position vs. time graph shown. For what time(s) is the speed of the object greatest?d6e51)fqnbr5nswa6 i k9(wto


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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 pzr7r;g xtr28of an object given by the velocity vs. time graph shown. Ft;7z rrpxg82ror 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 fixed t; ;yev4f+;iieg u)6 mt vorhj i2(vn(qime interval of an object’s motion, what qj;vvn o;qve+it iuimyg 6he((2 ;rf4)uantity 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 al:rlog( v zlx/1ong 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 ag3 u d,pucx gzpk+7(yt* -5vrr trip in 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 the ground in a kn0iz) jz4(va 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 releaseg)cvo lmj8 -g.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 movingudw ,;i67 n. jqdy; tp+*ldqem along a horizontal axis is s,6q7;*d djq+iytm u lwn.de;phown. 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 the following choices correctly identi 3:glc/ pcyxy1fies all of the listed situations for which there is a non y1p cl/gycx:3-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 obje)h3 k5cob 7btw2 m*faact moving along a line is shown. The object starts from rest at time t=0 s. At what time(s) does the object atta7 )*5 taoahw32b cbkfmin 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 linha z*.78 4awri.ai usae vs. time is graphed. Which one of the w4 a7r.ia*h8a. ai zsufollowing choices best gives the proper interval(s) of time for which the object is moving away from the origin?


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66#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.09: Two cars are moving to the right on a horiz8gv, l;w4dymujj 9o (tontal track, each with constant acceleration. At an instant of time, jolugyj8d;, mv94(wt 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 iuvoc2u9 gdmf./ 2e3 ga 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 in thew+x e6b ,p+hdn graph, which one of the following choices correctly describes the relationship between +eh ,pn6dw+b xthe 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 i kpw a pk*hjca;vq2:tut9)i 52slt5f /nstants of time, at which the car and truck travel with the 9qt:vk2a ;csu ftjh*a 5i 2ptkpw5) /lsame 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 o328 ho.rbcslti+ z6rfrom rest at the origin and will move along the x-axis. The acceleration vs. time graph for each car is shown. Which one of the following choices correctly identifies the relationship for both the speed tozr 3 os6+.8li2brchs $v$ 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 hor5ff2zrz x+pvr8 7c*m*l) pz)fhljd91 gw l,tuizontal line is shown. At what time(s) is the obj rl+ hmj)*,9fgfv2c8plz w tl*rp x7d uz)f1z5ect 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 positi ,vjm:av3f5 tc32,kxy rsa;y kon vs. time graph provided. During what time interval(s) does ty:3,25svy fx,3ca;t mv kkrj ahe mass have zero acceleration?


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