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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 -n1iiq /btlnk+/c5eoa 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 particular m/ pwttz; c)5pdirection is calledp tczt;)5mw p/

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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 ciy98 gxcd e:5usrcular track at an average speed of 98ce yu:dsg5x 50 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 sfd+4pivmjx;tdlb d6 -5ck 0;t at the constant velocity. If it continues, hom ji6pd5-ldkfbt d ;x4vt+; 0cw 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 plank that is sliding at 5.00 m/sbza6h was8/b9f; (2g ai0:g qrq 8caym 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 lm ;i6h9f:qq(gba ws 8ga0 br2c yaa/8zeft, 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 400 km at 1u) +va2e;dq6xlynbjmm8g, ,q00 km/h. What is the average speed of quv6y2 ,jqdx+lag;n,mm 8 b )ethe 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 moti/3ruil j8u cx;on of a toy car traveling along the x-axis./j;ic3uxlu 8 r The graph 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 travelinyk ivj6y4d w,4g along the x-axis. The graph shown below is avjwk4 d4i ,6yy plot of the 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 to the motion of a tlwx( t6mfl,q6yq,v (l23 kdlnoy car traveling along the x-axis. The graph shown below nqyt3lllfqmd 2v6,kxl(6 ,w(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 duesa*2f)pv6x,jvf m s- /g +pifh south for the winter. At what point did the duck stoia x-6sfh,gvfs)v +mf2p/* jpp its forward motion?





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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.17: This question refer to the diagram below 1q r43ixq js.swhich shows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. What was the averagiqsx .1 q3rsj4e 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 belowx.n-i.9nd5boryk,+z*kbrt mb zhc .( which shows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. The average acceleration during the entire 3 second interval. b 9ry .ri.m,+c 5kx(bbnzkd-z ohnt* 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 shapo -ppsc 9md m0 er1tvj-j0kni )vc/w/2e of the velocity time graph for an object with the position time gm-1-sjt20o9jn /d )vircw0cm/kvpe praph 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 i*u kb(f+ewyb i7 ;5fnaki7 nai.vp33fnformation. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor and rebounds to its origiyf;k(+nf.kavp7w 3 3b 5bfeiau7ni*inal 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 th. z3l6ahewl ;ze following information. An ideal elastic rubber ball is dropped from a heiez;.hwla3 6lz ght of about 2 meters, hits the floor and rebounds to its original height.
Which of the following would best represent acceleration versus time for the bouncing ball?


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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  00.39: If a boat can travel with a speed o3th8ei qd;ptt dl4ozf je8187f $v$ 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 tdvle1+u7/ z7z 4vt;ylptxd+rvk1l,29 s puhqhe 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:o5kcs5zbo od)3o ej0 r/.oq(y 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 refryx,qj/z bb7.e;0 e;amt)somers 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 rmom5t7;t8yb s wtea/+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.
If car #3 continues to constantly accelerate at the same rate what will be its position at the end of 6 seconds?


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21#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.33: A small ball rolls down a ramp, across a horizontal table top and off zzc v9xj35l+d the table edge. Which of the following would best zz+ cjx dl935vrepresent 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 rel7hejrtf f03 dac.xq z7he9b3 :ationship between distance and time for an object 3 j e9c77tdx3:0erb fhahq. zfthat is moving along a straight line. 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 time for a tytxl)ur81*k :jgy5zn object that is kyug*ty1l58t jx) rz :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 str+dq:e*coov5 iaight downward on Earth with an initial speed of 12.0 m/s from a position 10.0 v*oc:o 5ideq+ 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 below represents a toyseke0c 9),dho)fdm)qt 8-ml d car starting from rest and uniformly accelerating across th8e0o- )kf 9)ch,qdl) etmsdmde floor. The time and distance traveled from the start are shown in the diagram.
What was the average speed of the cart between 0.1 seconds and 0.3 seconds?


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26#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.12: The diagram below represents a toy car starting from rest an4hwfj(:pm.1:5gxa6x r eufg 7bbclvt )za. 3bd uniformly accelerating across the floor. The time and distance traveled from the start are shof.l bra(5a)c b743z: w1 ut p.gmj:bxx vg6fehwn 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 ca pvt+n( betlt5(i(f )sr starting from rest and uniformly acceleratvt+n(l5e(i(t pfs) b ting across the floor. The time and distance traveled from the start are shown in the diagram.
What was the instantaneous velocity of the cart at 96 centimeters from the start?


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28#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  04.08: The diagram shows a uniformly accelere3;4bzlz ,: i2 4 jub;+ahrvf bet6x h)gcc(zmating ball. The position of the ball each second is indi:lmi ) 43;fjc , +h4htzabree; z2cb(6gbvzuxcated.
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 position of the hlkl+cq5a o: 1ball each s:+5l ck lohaq1econd 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 clown on a uhky9qn,xb zusbq r, v7h+je:+ (0l1oonicycle moving in a straight line is shown z0bhq+o9xkobjun e7 sv+lh,: yr(1q ,in 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 cixo . 212folebsrcus clown on a unicycle moving in a straight line is shown in the graph beloefxo 2l.o21s bw.
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 surf0oawa/ br:/g aace 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 og2 kh sobi/9.zq *y/pmmjg-v /f a marble on a table top for 10 seconds. For which time interval(s) did the g.zyj*ipv b/k/q s9g- m/h m2omarble 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 m;9mox g fj*gl7q8hci:arble on a table top for 10 seconds. For which time interval(s) did the marble have a positive accelerati ;xo *ghi8:clq7g9m fjon?


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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 d ur g;zx/wxouz,cy52*escribes the motion of a marble on a table top for 10 seconds. What is the marbles averageo 2c; u5,xuyzzx r*wg/ 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 uniformlh4k p3mq;km 7)sn )wquy 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 downward with a sdrsup5x.vb 7d 7kr..pm .;ul apeed 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 represent the :r 9r)akmp*gh m)cr5hxpi 76* ue +svkmotion of an object moving with a constant speed i6g9*hmi5e )rvp7rxup):*ha s rk ck m+n 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 car ac +ocan9z9/3zf v/x rfbross the floor for 10 seconds. What is tff 3/x9rza+noz9bc/ vhe 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 across xo;qm/fukq kc,,65mvskfsait yo * u os63-,.the floor for 10 seconds. What was the total displacement of the toy car for the entire 10 ses y 3.cof ok6/*vqi s,;mkku 5,tu,o m6-sqfaxcond 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 taj0v5e8jwrb 0p ata66he motion of a toy car across the floor foabaj v5t006 e 8rpw6ajr 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 :ayaogo 7u(2o 60 km/hr in 4.50 s. Which one of the following choicesuao o(o2ay7g : best represents the acceleration of the car?

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43#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  06.07: A car has the velocity versus time curve showna:y t/up:e ke/sab1a ;f3e9tw . Which of the following statements eaa ae3/tep f9u1;:kt:/ybws 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 2aj6;b :: xwr4 owsjcpalong the x-axis according to the velocity versus time curxw6b::jra s;pj4 w2c ove 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 thatuzqipxlomyy 00w /w*jv*6uy3f 6 0 +ak the angle between the velocity and the acceleration of the q/0om+ul w06k03aw j x*yvi*y6fzpuy 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 kilometersv ,9bi ghsvzzt-6 9kh 0hk,ye. apart and traveling toward each other.0ekh.vsi 9gb ,9 v6ztk,h- hzy
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 posi,fn f7i6mwsv0 tive and inc 7i60m nfvfws,reasing

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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 s.hi v8/jbovn2d zm8c 4pb94 laverage 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 mv1.unncaoht09n 8nbjd h*wq5 a2 .qq6t+kx0 dimensions, which one of the following choices identifies quantities that must have the same*qvhnnj x a9.mk1hb nqtn6tdoq0+c2w.ua8 50 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 move6dmtw( o5t2 gxs $3.0\;m$ 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-tiabq ))xw8 0o 7ehzykhc3y1la 6me, $y\;vs\;t$, 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 total tiv t)q j:43o4f;iwshmmme T in ): ;o3m4f4m q htsjwivtwo 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 strpeyyo0:aq ))ik.km :k aight track is shown in the diagram. The thick line represents the velocity. Assume that the c0)koyk)q k ia e:y.p:mar 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 thge. g,3l.t xcl3qdp 3fe motion of a car on a straight track is shown in the diagram. The thick line represents the velocity. Assume that the car starts at origi,d3 x .lleftqc33ggp.n $x=0$. 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 tbmp (cuj,.o( .2ls+o b boeogj2i)qc+he position vs. time graph shown. F c js2l2 icbogb+jp((ou)..o+,emb oq or what time(s) 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 motion of an object given by the ; *5)mheid:lnm do/y yvelocity vs. time graph shown. For whiche/dyd5n;y m* ho:mli) 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 vsz7yfp1jtz.j-izn ( v0 . time graph for a fixed time interval of an object’s motion, what quantity has be(j-zty .zf10zp 7ivjnen 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 increas 0b0mlz;5bui nu*bmo fq.*ta-ing 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 twm eolf4j aodqe*o0av0j/;/a( o 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 rele9: p, wqt u)(v -bo5rh2oyeiops/h/loased from rest and reaches the ground in a time of $2.50\;s$. Neglect air resistance. With what speed does the object reach the ground?

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61#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.03:A small object is released from rest g. , n2w+b va4yxb2ursand 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 moving fgy41cozr 4q9 w1g8)+ y jx 3c5cgp6xj3imswdalong a horizontal axis is shown. What is the total distance traveled by the partf4qjr c3w 3)5wg 8y 9odj1ypcgig4mcxx1s+6z icle 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 ch,f:1tb1wjgwhx xo 0 o(oices correctly identifies all of the listed situations for :ho01fxbwgwjxo,t( 1which 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 obj tlj5/hb3 0:cf5hu1 bowv l6kject moving along a line is shown. The object starts from b hbul5/wh0 3t 6:fjcklj1o5v rest at time t=0 s. At what time(s) does the object attain a maximum displacement from its starting position?


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65#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.17: An object starts at the origin and its velocity along a line vs. ti8cx ,;kb-x-f( vlb2uo ia7quw me is graphed. Which one of the followinak 2ou(q8 7-i f,; b-uxcwbxlvg 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 horizontal track, each with c d(-9tzj miqt s.8am7ronstant acceleration. At an instant of timem. j7atr9im-t (dsq8z, 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 hasb0cxj60i:o f, wmu5ymyp 74d/y gf)1ddqun(a 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 in the graph t8 dlxm6)hn* b-q9hbd, which one of the following choices corr6t89hqdnbh l*bm x )d-ectly describes the 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 ;+cbk + hqr4chx, zd9k8h)riathe instants of time, at which the car ;d4q98hxircrh,k+bca h) z+k and 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 will a dx: ntf6*jcw86vdm9move along the x-axis. The acceleration vs. time graph for each car is shown. Which one of the following choices corr66v: xtd9d8f c mnajw*ectly identifies the relationship for both the speeds $v$ and the positions $x$ of the cars at time T?


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71#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  16.02: The position vs. time graph of an object moving on a horizontal lirw. vme i8c7urp;p7j.8,lw fvne is shown. At what time(s) is the object moving with its grpw;wfjpli88vu .7 7 e .rm,vcreatest 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 tv8n25 5h fu2fkp ,uwxshe position vs. time graph provided. During what time interval(s) does the mass have zero ac,pn k52s85fw u2ufv hxceleration?


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