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习题练习:Physics Bowl by Topic 2: Kinematics - part I General Motion

 作者: admin   总分: 72分  得分: _____________

答题人: 游客未登录  开始时间: 24年03月31日 09:50  切换到: 整卷模式

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1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.10: A particle travels at a constant speed around a circ;re(er mr;il j+06if)zthfl- ,7tpfaular 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 tqfkgx t1 .nip*o(0j 1* vh*pqsime without reference to a particular directiokt(*sjfgq10 h.x*i1vqpn *opn 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 averefl a-4w pqhoxks +4 .4xnadi 2zxej0d/k:4t8 age speed of 50 m/s and then completes a secxwe2axx h4d:lk 4 0k eq.jtd+pso f4i-n4z/a8ond 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 veloc,t 6kta+dvjr 3f,js-eity. If it continues, how far wi-,k6jd r3vt +a,jseftll 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: 2gdj,9kb d+gvh*i7usvcv a 9-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 t9g7c j*+bd2v9 dv ui,ghvkas:he 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/h6u a e3,dk2dlpgm ;i3j and 400 km at 100 km/h. What is the average speed of the kgmu j3i3d2e, dl6p; amotorist 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 tr7 p0zpx1 ;qysfaveling along the x-axis. The graph shown below i7qxpy;z sfp01s 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 mottfuv l0b 5* 3mq4zru9io0kcu6ion of a toy car traveling along the x-axis. The graph shown below izmklo00 63ub u4u5* iq9rt vcfs a 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 xttd;ujj(4bxn5 e*5f) e88q z 6awithof a toy car traveling along the x-axis. The graph sho *b;(8)6jfh tw8qaj5zx4 x t5nideute wn below is a plot of the car’s velocity in the x direction, $v_x$ versus time $t$.
How far did the car travel during the first 15 seconds?


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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.15: Given the graph of the velocity vs. time of a duck flying due south for tkz zeh ;n+/2bo+nnf3she win2 efn+ kzb/+;z3h sonnter. 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 diagram below which shows the p40 vq(av,.kog rn 5d4fxh+uu position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. What was the avevp gqu+o(fhxra.v4d 50, 4kun rage 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 which shows th6fjuqlnv1ym (2c:iis ke6 o.4v12nl oe position and elaps(ml122oi : j.6qeikl4cnfv1u oy v6 nsed time of a car starting from 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 th /fw, 5tjlp x-pnx.g1je velocity time graph for an object with the position time graph shown in tt -pn5,jxg.w/j l1p xfhe 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 following1( )pir)fhnkl information. An ideal elastic rubber ball is dropped from a height of about 2 meters, ()nlfikrh 1p) 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 followinqd fbmnte 57: (u6z(ssg information. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor and rebounds to its tqfe6mub5:s(ns d( 7zoriginal 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 spe heb57w tucbk085q xh/ed 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 their3cb* 9 f-m uvb,kc6m 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 fojmkyg:efd:+3z u) wd( llowing 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 fovl jz46ao k6v .2bs3qrllowing 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( 9l pkzxho7x3 r,x9ar 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 r80evp-kws 5amghu8 1k amp, across a horizontal table top and off the table edge. Which of the following would best represent a graph of the magnitude of the ball's acceleration vs time? hkpe wm8 -5gavu1k80 s


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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 relvu+dq.j ;fpdk jt +)u(58lwbk-n1i8pe pm xi;ationship 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 secf; u8 jw ki5 8j.+)v-1tbe;+id xmqpupk pdn(londs?


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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 o*.izbz iwqd4ni+ +qg./sa v0between distance and time for an object that is moving along a straight li /bi anid.0z qizqw*.+ +sg4ovne. 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 objecj pfl/onnni6 e/k7wf0se 3) m+) :bcuht is thrown straight downward on Earth with an initial speed of 12.0 m/s from a position 10.0 m above the ground. Ignoring air resis i6+l:/ n 0cfneh7bo3euj n/k)f )swpmtance, 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 toy car starting from rest and uniformly tx0 q-7q0gdd)pfl7w p1tzes* accelerating across the floor. The time and distance traveled from the start arep*tq7eq s f0- ddptxgl0 1w)7z 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 repqyh)kn itrd -v fax9xin(1.*31(xd lu resents a toy car starting from rest and uniformly accelerating across the floor. The time and distance traveled from the sta )yn t3vxa1(d.1n(x ku*x-ih9r qilfd rt 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 repp5gna 2m:*cn pv+jes (resents a toy car starting from rest and uniformly accelerating across the floor. The time and distance traveled from theg v(nppc na5emj*s :2+ 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 accelerating ball. The position of theub b;.n.+u, a5b7cpko.oklx k ball each second isko.b+obl c.7 , .kbp5ux;ukan 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 uniformly acceleratiner0 l5 jti89 qrzffr bq.+;n,y-kl+obg ball. The position of the ball each sec+9q fl0eby;f58jnqi b +kozlt r-, rr.ond 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 unicycle mot a9fm-t 4xepjel- xpz,6a)(a ving in a straight line is shown i9z(apep6 )taf-,e x-4j atxmln 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 o1 mb2o4jfk r8a unicycle moving in a straight line is shown in the graph8f2m4job rk1o 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 pqjl20u+ ykb2y u t*b5near 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 ta 6w;u rouqrwz9 k;/r.jble top for 10 seconds. For which time inqrrukrw o;u;96jz. / wterval(s) did the marble have a negative velocity?


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34#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.12: The accompanying graph describes the motion orr.pem+: ff +mf a marble on a table top for 10 seconds. For which time intmpe+m+ : frfr.erval(s) did the marble have a positive acceleration?


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35#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.13: The accompanying graph describes the mo6)ml6)7w6w z wock vobtion of a marble on a table top for 10 seconds. What is the marbles average acceleration b6 6l w7vkz6w)bmoo)wcetween 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*(, a:cgi hkcb 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 downwfa( tf85k80. jps etpzard 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 reu bo(1w0qvz nuy2-n*l9 m,oy epresent the motion of an object moving with a c*u,2uln( onoy0v-ebqwzmy19 onstant 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 car acr7bi9clk y*h) toss the floor for 10 seconds. What7) i*9tyclkh b is the acceleration of the toy car at t = 4 s?


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40#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.25:The accompanying graph describes the motion of a t9l:e eih-zcq )oy car across the floor for 10 seconds. What was the total i9h -qc:zl)eedisplacement of the toy 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 accompanying graph describes tcc: ol v 2h;pbtww4jv g*a5/3tgwd+ a*he motion of a toy car across the floor for 10 seconds. At v/* 5w +tab4wd th a2v:g3cpjwloc;*gwhat 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 4.50 s. Which one e7v8-ai6grl qitu z,: of the following q lvg6ate,8rii:u 7- zchoices 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 shown. Which of the followii e81qoob)yubbh5 .7b ng statements regarding itu 7bbbyh o ei81)o5qb.s motion is NOT CORRECT?


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44#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  07.17: A toy car moves along the x-axis according25 7c+ dmyf; e.cme ny fd-ab+c6fr(sv to the velocity versus time curve shown to the right. When+efm5ds fayec+n-yd(mr 7 6f .bcvc2; does the car have zero acceleration?


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45#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  06.22: During an interval of time, a tennis ball is moved so that swb pz;ml3j0. the angle between the velocity and the acceleration of the ball is kept at a constant 120 degree. Which statement is tr;lmjpz.0 b 3swue about the tennis ball during this interval of time?

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46#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  07.03: Two automobiles are 150 kilometers apart and traveling toward each oth 24ywtvuv 6nz4er.tv4wyv26zu 4 n
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 accelerationrnzn (/jv:fe c1w s8pjq)9hkzmv(07 b is positive and inc9n ch 8p(z1es:) v/qb7m f0jk(rjvw nzreasing

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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 average velocityc cbo j/b p+7+qfvj;q1 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 following choices iym cz(n )*r78omb/fzera ( ,ssdentifies quantities that must have the same dire ry/ e n )8(*a(ozfb7cs,zmsrmction?

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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 6+pz5fh v8o vb0ub f, z9qv0e(h4agq7slmbi 1 $3.0\;m$ 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- croihucq5xth z;6s(yl;+n30 time, $y\;vs\;t$, 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 ti5 pd9gtaveie*kz( )m9me T in two part v*i 5t)d9zap(9e gekms.
• 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 straight tra(dxtcr *gxq-( ck is shown in the diagram. The t t q*-r(xdc(gxhick 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 on a straight 48hm5 q; bnuq3 ykl-ldtrack is shown in the diagram. The thick line represents the ve8b4qmu klq;5 ln yh-3dlocity. 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 j yb/5n es7n*61h wdvihi/*hjby the position vs. time graph shown. For what timeh*5w/j1*b yheijh/id 7v6n ns (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 velocity vs. time graphyv+n i;; q4kvv9z grw;ys8ig. shown. For which time(s) is the acceleration of the objecgy;+;i ;wqr.8z4i sgnvv y kv9t 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 grab+ wl4kgr,; 5htwccqv 47 ba6hph for a fixed time interval of an object’s motion, what quantity has been46crgtbl 4w , ;7hckhb+5avwq 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 hor 0qb;,5)iw wdg 0acoodizontal line with increasing speed.
choices could represent the signs of the velocity and of the acceleration for the object to achieve this motion?

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59#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  11.14: A car makes a trip in t bcl66(p8g gwnwo 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 1q7ia*/vfo n *t2i4hlr,nfgi 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 r-uc tjxo 7(fkp0kd,/py0e;h9nv 6;r is yu 0rpeleased 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 moving along a horizontal ax1zpucn;(r5 jna t5 sl7is is shown. What is the total distance traveled by the pntjl7z5nrupc5s ( ; a1article 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 f6 v+0tdy piik2jj4s6 the listed situations for which there is yik fj0vit4j66dp+2 s 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.+r7sqy 46v(o4pn vyqq g.o6a(aivto 9 time graph for an object moving along a line is shown. The object starts from rest at time t=0 s. At what time(s(6r44 qqa +vo v(gts7nya p6qvo9i. yo) 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+kw z.-tl8iqs yj r5 n;7sos.n 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 awal so.5 wy j+z.i8-qr7s;tnn ksy 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 b.x5ammr96) m)*vf ; phuc cuyto the right on a horizontal track, each with constant acceleration. At an instant of time, the information h965vamuucb) mxy;mf*p .c)rabout 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 hasvd5rli+6n jh1 d d*l3a 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, 4(zfysmoz6kr cal46 3 which one of the following choices correctly describes the c6l4yk6o (sz34ar zfmrelationship 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 theh hs oyos76+/aip g4*xndv )y4 following choices best describes the instants of time, at which the car and truck i*oh47syxa+ /sh6yv4n dp)o gtravel 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 an bk */b lyy s3twscs+-l)3fan4d will move along the x-axis. The acceleration vs. time graph for each car is shown. Which one of the following choicebf +bwk4t-aysns*3 3lcy /l) ss correctly identifies the relationship for both the speeds $v$ and the positions $x$ of the cars at time T?


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71#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  16.02: The position vs. time graph of ansqr2okan 41-lz;c*svd v /x1m object moving on a horizontal line is shown. Aa2q*s-4 1;l sr 1k/ mnvvcxodzt what 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 2ykz-hd cxhu4anyu04b 5k fzmyz1+8. the position vs. time graph provided. During what time interval(s) does the mass have zero acceleration50x dkky+u yz41 8f.h4ycm ua-2 bznzh?


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