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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 axtice0 )vz+4v,t.lzg 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 without reference to a pacfv wu .v+eivfu*n -1)vxg46s rticular direction is c*vu4c.f +nswg1fu 6v) - vxeivalled

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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 speju3n*or7og hspd8 o 06ed of 50 m/s aoj d 0un8g7h6r*3oo spnd 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 movsnlra84 8nie+j1)yd; qfwblbj zd./ 2es 0.80 m in 1.0 s at the constant velocity. If it continues, how far will it travei8jq)zw.;4 sbr n/b2e8+lylan f jdd1l in 3.0 s?

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5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  05.34: A 40-kg boy is stationary on a 30-kg plank that is sliding at 5.00 m/s toed7ywd k-pd), the right across a frictionless pond. The boy then turns and starts walkiny7w-kde p) ,ddg on the plank at a rate of 4.00 m/s to the left, relative to the plank. What is the speed of the plank relative to 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 d/o72mozy un5wf87l f400 km at 100 km/h. What is the averaz du5fl7o /78ofw2 mnyge 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 ofbrf4ukvzf jf h* 0a6/6t(ib+ w a toy car traveling along the x-axis. The graph shown below is a plot of the car’s velocity in the x direction, ftv06ub +(a jw6ri f*kf4h/b z$v_x$ 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-axgy8,ubj0c unz9+ kt yk6wq17q is. The graph shown below is a plot of the car’s6qu1w gyt8z+bn 7 kk9uqycj,0 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 vm6t0 7t ok(:3ooqq1yva 3bxicar traveling along the x-axis. The graph shown below is a plot of the car’s velocity in the x direction, qa:v (1xo3 3yot0o v7qb6imkt$v_x$ 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 xyrx( sw*ijca5 ,7*3 fpy/amithe velocity vs. time of a duck flying due south for the ry3x*aa/ 7x,5 icjy fp(msw*iwinter. 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 dianpi3u 3r4pku. gram below which shows the position and elapsed time of a car star 33iu.4nkp uprting 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 diagra0b.f u oj/*7kpxbl ,wym below which shows the position and elapsed time of a car starting from rx* j,kuy/o. pflbb7w0est 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 t2d3a*mcbg r1( yg 8/xz3extqrg,.nnu he position time graph sho3qt nrda12c,er u xym3bgg(n8 *z/ .xgwn 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-pha6 )l8d 39dwz m sv*-nzdra refer to the following information. An ideal elastic r6*vspn)3w dr-hz -8almzd9a dubber 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 followi; xjmqb;r s3s7ng information. An ideal elastic rubber ball is dropped from a height of about 2 meters;sbjrx73ms q ;, 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 caner rrq hjc65:z0j48g o travel 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 the gct/v7dctwl 1 u0y6y, 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 follow( 0t 9t7(00g gqzo3utruxu ck6twglh (ing 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 refers to the fxfxd ot+;i1qq0 p );wwollowing 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 f/-;xmho.c h(e;t g7ex fmtf /kollowing 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 horizon;4xc wtlfj l+4tal table top and off the table el+x4c t4fjw ;ldge. Which of 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 represqt fsi)endp(z ar2 31*ents the relationship between distance and time for an object that is moving along a straight line.(znrs2t p )aidq1 3*ef What is 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 timm)83 jb;b*i s tsgrdi:e for an object that is moving along a straight line. Between what times did the object havs;3bjmi)i*r b:8gtsd e 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 Earth with an initiaf2,4 6v.eyrnc3ptswt l speed of 12.0 m/s from a position 10.0 m above the ground. Ignow ept . ,c6rnfs2vy3t4ring 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 repprq g4; .uvz26d x8wg mrr x0zxq7n9o.resents a toy car starting from rest and uniformly accelerating across the floor. The timepwxz97r g zx6qm80g. n42.dvrq r;uox 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 frou5fyb k9-lpf(v1 t nk6m rest and uniformly accelerating across the lv -fptf 5bk1 kny9(u6floor. 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 repfe5,6b seo,yu(/dwzb resents a toy car starting from rest and uniformly a deow(se/,z,5yb f6ub ccelerating 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 s pyco- tc47m)z u,a -7vdijpwoud2 u7n07ty;zhows a uniformly accelerating ball. The position of the ball each s tpu0yyz)zo7c-pvddwuo72; 7 -nu74j mci ta, econd is indicated.
What is the average speed of the ball between 3 and 4 seconds?


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29#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  04.09: The diagram shows a u ykfnf9aj; 3li(.z;1p4p qhgb niformly accelerating ball. The position of the ball each second isq;.lyhb;nf pza(9jg3fpi1 k4 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 clowbk/0t pw,0tsnn on a unicycle moving in a straight line is shown i /0twns,tk pb0n 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 unicycle moving in a straight zk* wd . cqt2i hk18roky:pu(j9t)x3vline is shown in the gr) zki*9c(w:d3hk 2y rqv8xj.ut1okpt aph 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 falt+vnwulua.w,*b (7 yxls 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 3r 4 f(sw6e *esgfp;akmarble on a table top for 10 seconds. For which time interval(s) did the marble have a ns4*3se gfp;k r(6efwa egative 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 orf qafhz;lli9 jx.0:v lo-76en a table top for 10 seconds. For which time interval(s) did the marble have a positive acceleratio7he jlq .:fv 0aiz;xfr l6-o9ln?


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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 griimo 8gs ipgi+g(4d;) hlb+5r aph describes the motion of a marble on a table top for 10 seconds. What is the marbles averagpgi)gim+hd;8oi5( l r4+ ibs ge 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 0 pj-m x)ke/nfof $2.00\;s$ 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, thro6klljg v6) gmvo7,1wqwn 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 fd)ipvxp*s9;gqj7/g7 wvjvae;*5 o;ffcn* lj ollowing graphs could correctly represent the motion of an object moving with a constantgfcp 9vp*ge;*dsj jxa;i v);qo7v/f7l5n w j* 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 describes the motion of a toy vsz9 f6m)yu-6wm i+v fcar across the floor for 10 seconds. What is the acv 9iym 6 ff-vws)+um6zceleration 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 across the floo;v+9wz 8tyv)ttbm9fa r for 10 seconds. What was the total displacement of the toy v )wz 9ty9v tbaft+m8;car 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 accompanying98 s0s8v izhmt graph describes the motion of a toy car across the floor f0 8i9sz mvsth8or 10 seconds. At what times or time intervals must the net force on the toy car be zero?


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42#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  16.03: A car accelerates uniformly from 0 km/hr to 60 km/hr in 4.niv--lq:46lgk jdsr 5 5yll7x50 s. Which one of the following choices best represents the accv4d5 lylg5kq-ils7l r6 :- xnjeleration 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 shown. Which of the followinyc3yn ymr(cm8-b4 , m6a4e)ifjz- goj g statements regarding its mot,)3 8-aijyrmmo4-ejzgfnb (c 4y my 6cion 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 acms(z37( zzgihs 0f:slong the x-axis according to the velocity versus time curve shown to the right. When does the car have zero 0(szsgfzzi :7mh(s 3cacceleration?


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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 l*i (9xr, esmj 0 fs5:8apzdvzso that the angle between the velocity and the acceleration of the ball is kept at a constant 120 degree. Which statement is true about the tennis ball during txz,:pl jz0dear5 f8(is* ms9vhis 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 travel fdq6 s+.4 zdfohwpw*.ing toward each other.q6hows+ *d 4z..pd fwf
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 posit .c.riq7x6r -d 3cqn.2wm 3fqowlc1rxive and increasiq.nxrqc1 3. rmd7-6w.i 3qccrflo w2 xng

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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 averagkvrsd4c2f24 h e 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 motio,+ig)rfgtc 7on in two dimensions, which one of the following choices identifies quantities that must have the same direct)goig ,trc7+f ion?

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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 moves x )qm;fdjhb 7,$3.0\;m$ 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-timelnbc *pa9 x p6 *71dcojkz,m8e, $y\;vs\;t$, 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 track for*;,+kw2hhe8b govb lf total time T in two parts. lg+h b,vke;f bo*2 h8w
• 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 st t1t ,le4+pb;qs7aeqgraight track is shown in the diagram. The thick line represents the velocity. Assume that the car starts at origse a;p lq ,qg4tt7eb1+in $x=0$. 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 iksg-:9iunoto-ck1lnpo /p 5z k2+ -aon a straight track is shown in the diagram. The thick line represents the velocity. Assume that th1 gun/9o-s kctpi2zapkkn io o +:l-5-e 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 b 1 ,:zbpz2qsjgraph shown. For what time(s) is the speed of thej2szb ,q1 bpz: 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 objec8s7 j/,g ye0fxwq:i, -o.housfv /ry ct given by the velocity vs. time graph shown. For which time(so yhcj, eyif /g, rvssf/ u0-o:qwx8.7) 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 f zshlumg v:,6i ;k2q/iixed time interval of an object’s motion, what quantity has been determined 6z;,2m g l/uih:qksi vfor 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 movem23imhu 0sszj07r x-9 zwgy2 us along 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 tri0,:qshmxyf: qt*/ ke.nghmu .p 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 releasedfl gt+j2p(1u abr sf8+ 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 f1q-a p jrt2-5yqxw(l0aig -kfrom 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. timnnvkspfd07hc4 7y :p o (vki37e graph of a particle moving along a horizontal axis is shown. What is the total distance traveled by t73noi 4p 7s (0kpndkvh 7cv:fyhe 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 identifies all of evivn.v sk52w y4/d3kthe listed s3syvkn d/v v e5ik4w2.ituations 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 fudsdb 4a*;:y jor an object moving along a line is shown. The object startds:d a uy*;bj4s 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 startshob2eltksr68h 9p95+w 9hczj at the 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 is moving away from the ori 9bh z9c562hl +jspekow98h rtgin?


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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, each withubz+m4 ra ))l7sntc2 u constant acceleration. At an instant of time, the information about the cars ismz au)2sur)bn ctl7+4 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 ,:jq 7 fi5kkd/l qes1eposition $x$, 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 the gra5xujlr:s 294 bhw. 8 fsvg4omrph, which one of the following choices correctly describes the relationship between the average speed of the truck to that of theb.5 44so:fs9h xgw2l mvr8ujr 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 8y.grekr04r ilsf 7- zthe instants of time, at which the car and truck travel withei 8-r7 r4yglr0.szfk 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,.i77 2 fq s evb(8(ka(axvql .18ysq f8vtdpuz each start from 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 co..a7 lvy78qvav xdq(bf(( tpfi e81q2szs8ku rrectly 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 graph3b768ga-a g7xo tvdpj of an object moving on a horizontal line is shown. At what time(s6aabx8djtg7pg-37 vo ) is the object moving with its greatest speed?


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72#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.08: A mass moves along the x-axis following the position vs. time grapw9yaz7wmoox f5y ;f7+wv: ntxtp2tf*72 ng*ih provided. During whagp*tfvf7 7:i2xoo2nmwwawytf79;+z yx n5* t t time interval(s) does the mass have zero acceleration?


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