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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 trav2vn0v +hgj+dy.h yx( wels at a constant speed around a circular path of radius $R$, if the particle makes one complete trip around the entire circle, what is the magnitude of the displacement for this trip?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.01: The change of distance per unit time wi8fid-km0twdpbyp 89a4yg 41s thout reference to a particular dires0a -t8b4im 8dyyw 1g ppf4kd9ction 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 complet+m imeuxt/n rzd-nq q53b468tes one lap around a circular track at an average speed of 50 m/s and then completes a second lap at an average speed omqzt /68ext +3n5n4mq-iubdrf $V$. 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 inm9vz2,kq nm 4j j6n,edm+qp6 d)zx:yg 1.0 s at the constant velocity. If it continues, how far will it t: ny4 6d)qm j e,zgqpxj26m9nmk+d,vzravel 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 sta2d1ab(n fdp ), qdl)kp7 bii9qtionary on a 30-kg plank that is sliding at 5.00 m/s to the right across a frictionless pond. The b,fdp)k1idi dqp)q bb9l(7a n2 oy then turns and starts walking on the plank at a rate of 4.00 m/s to the left, relative to the plank. What is the speed of 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 100 km/h. What /s+giae (d )cjis the aver/ agcied(sj+) age 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 traveling alon-wa8vdnw(s br h7.v+jg the x-axis. The graph shown below is a plot of the car’s velocity in th8-d.rbvvn jhww7 s(+a e 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 7j(s+z nwuf7qthe motion of a toy car traveling along the x-axis. The graph shown below i +wj qzn7fu7s(s 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 mflq /z bpsel+vy)2p+(otion of a toy car traveling along the x-axis. The graph shown below is a plot of the car’s velocity in the x directv)2(zbpylq/ef ++l psion, $v_x$ 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 xrv9 q:4 h6a4hsfwno*ss* ;qfthe winter. At what point did the duck stop6q9ssn*vhoxfs *4hf a 4 qrw:; 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 tz azw p:-p(r5mo the diagram below which shows the position and elapsed time oppwzm5 azr- (:f a car starting 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 diagrav qs vtdhi.7/2m below which shows the position and elapsed timq2 vhi7t.svd/ e 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 the velocity time graph for an object witz41jmm(f+k 1c,tv , s qrqi-oeh the position time graph szeq- iq1v,k 1 4j+mmorf(tcs,hown 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 refgb49tg urhsd*a 0e n3+8hv7pa er to the following information. An ideal elastic rubber ball is droppedgg3uhd8b+ap 4tah 7rs0 ev*9n 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 following information. An ideal ela r,6j;wzenrx-cema .j(; qx (gstic rubber ball is dropped from a heim ;gn(;a(cj-eq e .xz,6xrwjrght 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 aaj3:ut j6jvjbxj(4+: 4 xq prxcq46f k 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 thu .z.pz20xs) fey5d yde 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 refe) ke(h dm29hvuec9dyp3*tp 1ors 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 refers to the following8utas,4w a8j jp4yj .u scenario: At $t_0$, two cars moving along a highway are side-by-side as they pass a third car stopped on the side of the road. At this moment the driver of the first car steps on the brakes while the driver of the stopped car begins to accelerate. The diagram below show the positions of each car for the next 5 seconds.
Which of the three cars had the greatest average speed during these 5 seconds?


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20#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.04: The question refers to the following scec5 xjtqt5w42( .s bkycnario: 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 horiz+o6 kk2u+j tjnontal table top and off the table edge. Wkj+6+ojtn 2uk hich 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 represents the relationship between dibjt g*eg5jdz )y4ft:/epd- l:stance and time for an object that is moving along a straight line. What is the instantaneous speegge/4d5jt )t :bzd- ley:jfp *d 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 distab3 qj/qs2h*m 6 qaw0dknce and time for an object that is moving bhq0j/s wkq d62amq*3along a straight line. Between what times did the object have a non-zero acceleration?


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24#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.07: A small object is thrown straight downward on Earth with an i- (;qfp . 0hj3i)hcemlcplwm3nitial speed of 12.0 m/s from a posii0(-fhmm;lcl33 phcjq )wp .etion 10.0 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 b,xz;)m nw(maa9tz0wf- v ax4 toy car starting from rest and uniformly accelerating across the floor. The time and distance traveled from the start are shown inz 4ftn;zv-9m0x)m awwxa a,b( 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 repr : yvdt,slob;9py4ad:gt;+n iesents a toy car starting from rest and uniformly accelerating across the floor. The time and distance travvoyt 49bygpd, d;anl: ;t:+iseled 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 rez2.b(09ulacfniru; sol s 9a1 dm2(hwpresents a toy car starting from rest and uniformly accelerating across the floor. The time (2l0mwi fad( blshu ;c1zo 9nu2s9 .raand 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*qtjkmlc9msv5 6 x5-e accelerating ball. The position of the ball each secondsex l5q*m-mt5 kvcj69 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 uniformly accelerating ball. The position o .qyc,x9y wcxb nkx+ffg(l333f the ball each second is indicalwcx(9k3,y x c.3+fq3fb gx nyted.
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 strkxgn16me an4 3aight line is shown in the graph b3ekxm g64 a1nnelow.
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 straighs) r- , vq o3ugkc8gxn,9-ajwet line is s-9nc ,u axeg,)s3jokgvr -8qwhown in the graph below.
After 12 seconds, how far is the clown from her original starting point?


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32#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.04: When an object falls freely in a vacuum near the surface of the eartht m9:okh3 zo2r

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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 vibc9pj+*yo ) motion of a marble on a table top for 10 seconds. For which time interval(s) did the marble have a njbi*p 9v )ocy+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 thehdgk )cyp7nt scz 2q.j.i -o01 motion of a marble on a table top for 10 seconds. For which time interval(s) did the mqz.iy jo210)cgn -k7ph.cd tsarble 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 e2ks2t n/ t6 doj0sd5ol+jl)s the motion of a marble on a table top for 10 secondss j5t d20se2l6 djnt+ /ook)ls. What is the marbles average acceleration between t = 3.3 s and t = 3.8 s


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36#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.20: A car accelerates uniforml)u1x5d/u wodv koi2t. y 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 speed kd+2 w .t2vwsm/ntn w3of $20.0\;m/s$, 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 followincvy b4ky )kk99;wk y08h5blg4tqau2 cg graphs could correctly represent the motion of an object moving withc 9ckuv4wgl)hkk 2tb 8y kb q0a;5yy49 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 describes the motion of a toy car across the flk if7y2*p -* 4lze9i)yo yybfgoor for 10 seconds. What is the acceleration o7 eylfyof2k*p4)i zi-y * 9bgyf 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 descris3axc7d/uit bh4da yu o 1-nk*613rvdbes the motion of a toy car across the floor for 10 seconds. What was the total displacement of the toy car for theksdda6hxr3-yu o 134dia*c/ t7vubn1 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 the motion ofova8rk r mo3/d3/ -bnc a toy car across the floor for 10 seconds. At what times or tima/c/bm3vr3 8ron k-o de 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. Whh ceu0y 6 .njq*b1o7izich one of the following choices best represents the accee 0jz7*b oh61i n.qyculeration 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 tibua6 9 )xkbml9me curve shown. Which of the following statements regarding its motion is NOT CORRECT? 6x9ml9 ubbk)a


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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 velocity vertwtbh7 pm x2t,x19g 4gsus time curve shown to the right. When does the car have zero acce4xxht 7g9gttw ,m12bp leration?


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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 tenn9 )n b wx k6j2zxgr2bbf6-a;zbis ball is moved so that the angle between the velocity and the acceleration of the ball is kept at a constant 120 degree. Whija62b6kw n2;9bgfbx br )zxz-ch 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 a4;e7nmu3iy h;g 3hvh vpart and traveling toward each other.;;g4 eiuvynm37hh3h v
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 mot(rvy jwi;6 m*ves on the x-axis. When the acceleration is positive and incre w6jmyr*ti(v;asing

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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 averagel5ik uj+ki0:l velocity is

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49#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  16.18: For any motion in two dimensions, which one of the followij/ e;l -* +na/bvjnv,rfxgg1 ung choices identifiev +bn- ,u1fn//;xjvgl raejg*s quantities that must have the same direction?

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50#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  09.17: A toy car moves q:uz)sg7,xw4 r 6 ee uliwffh60u1yr,$3.0\;m$ 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-tim4f ;i*h 6sdatke, $y\;vs\;t$, 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 fbf( o-qque .z67urnf9( g 7klhor total time T in two paruf 6 u7knqh(efl.q-79(gzob r ts.
• 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 ,za4 jhza* dipaog0 -8of a car on a straight track is shown in the diagram. The thick line represents the veloc-p zjai,d0*4ag z8o haity. 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 m 5lpmuf+v3/:lpu+ ov ;y. cuqdotion of a car on a straight track is shown in the diagram. The thick line represents the velop p;uv3.cu5:vl /l++uyd q fmocity. 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 ob (/prb0q tiz:m5ni5qfject given by the position vs. time graph showif55t: i rmpnq qb/z0(n. For 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 obj fw d*p:c pg*r7j0aglbsb eue6u63 q.c71)ubfect given by the velocity vs. time graph shown. For which time(s) is the acceleration of the object fe*:qe d. f36)17lj6ucp7p0gwg * cubbsurbaequal 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 gt6estklf .nt6fz *esl8f-:4mraph for a fixed time interval of an object’s motion, what quantity has been determined f8l e 6 tl64stnse*fmzf f.tk:-or 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 a +ur u,3a0si)f1nm+;fex cucf yk;6i dlong 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 trr);8 kua/qe xcip 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 redj*m n zdh5 wik7-;l/fst 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 and reaches the ground ine 1bc 7.+zvzghif*u :,msa4pd 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 parti4 +-ah- cb ur6ss+hnpdcle moving along a horizontal axis is shown. What is the total distance tacp 4h-dsrb6hn u+ -s+raveled 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 choic9 x:8raagbh6 9 jjhgy0t:t o2ies correctly identifies all of the listed situations for which there is a non-zerxag jgh 08o:r tyhb a9t9j:6i2o 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 object moving alongcdg-; +wqu cy7 a line is shown. The object starts from rest at time t=0 s-+;cwu dg 7ycq. 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 i ayei2 kw g1z9g13bm (np/ppr:ts velocity along a line vs. time is graphed. Which one of the following choice1 mbpgz 2 r3g1 :pa9kwipn(y/es 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 ton sn+6,ljw0fj.db(bu the right on a horizontal track, each with constant acceleration. At an instant of time, the information about th+(0bl,sju 6 nw fd.njbe 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 hash:c j7nd en9j1 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, which o+ l6uq w9fao3.edsp *fne of the following choices correctly describes the relatiw+sdlpo f3e f9u6 *.aqonship between the average speed of the truck to that of the car?


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69#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.42: Which one of the following choices best describes the ins7u xibm;6 qs;fnw/b6 ltants of time, at which the car s6 7bfbquml/x 6 i;;wnand 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 r aku qbc35m2z+est at the origin and will move along the x-axis. The acceleration vs. time graph for each car is shown. Which cu 35q+a2mbkzone of the following choices 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 grj9u7kg x fudk ;x)r;;ao5e:qgaph of an object moving on a horizontal line is shown.ouxgk;qfku9g jd5 x;a;r 7 ):e At 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 the position vs. m bldo 2/,x+oitime graph provided. During what time interval(s) does the mass have zero accelerati ,xo2dl+io/bmon?


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