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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 aroks- j cpyoqodmm; bu; /wjd2/79-kn t9und 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 disdhvj+.gti 0 (d3jpg5rtance per unit time without reference to a particular di+gi( jdg5 v.dr pj3th0rection 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 lapilqswg3ou 5-g9s n83r around a circular track at an average speed of 50 m/s and then completess-nw9 grslq3gio8 5u3 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 q ncho*:x/ sx2*upu,z1.0 s at the constant velocity. If it continues, how far will i/u,2u c:zpoqxn *sx* ht 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 isl4 1h 2mw 8wskw,+f/ ;j ju.f8xme:xu)leeeca sliding at 5.00 m/s to the right across a frictionless pond. The boy then turns and starts walking on the plank at a rate of 4.00 m/s to the left, relative to the plank. What is the speed ofa8/; w.km)uef4:wc 1 8xeum +hxs 2leefl,jjw 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 kmrp8/ tx cnxdyna qw1,8e872em/h and 400 km at 100 km/h. What is the average sc 8ndprxyqt88,wa71/mn x ee2peed 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 traveb ) b-fy)p ,muffus6g8ling along the x-axis. The grap -6 uufs,bf)m 8b)pgfyh 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 traveling along t-p 5jfwptk3a )/(medxhe x-axis. The graph shown below iptp- ) dfw5k/xe3maj (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 motion of a toy car travesb3v(t dtkv .,ling along the x-axis. The graph shown below is a plot of the car’s velocit vtvkt3.b ,s(dy 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 hs /i.,fg 3 gol+hc*5zv1zipeflying due south for the wi,i+sh3p g .zocz1/h5v ei*fgl nter. 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 s tj 1* /w iyet3 zznypqn; qm8u-,54uxuo:ca-bhows the position and elapsed time of a car starting from rest and uniformleu *;oq4/ ytz :-w-auctnny5p3j8 m,bzqxui1 y 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 diagram below which shows the position and ele/jo 9a. 8fp p;:hh a5lpklal3sy/ .wwapsed 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 sylkp/p;e.5.ofj lph l wawa3 h8:9/ a


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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 velociecxt db1-(d; +- fs9jjonwcx6ty time graph for an object with the position time graph shown in the diagram at right jt s9f-xe;dw1o(ccj+dnx6 -b ?


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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 qqx5o.jty*o8 9wpc8xgb 7zqc; e*r nj0uestion refer to the following information. An ideal elastic rubber ball is dropped 9xot8jj*yex pgrb87 ocq50z w;.qc *nfrom 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 questio46p2* ud qd)o cxt/kmzn refer to the following information. An ideal elastic rubber ball is dropped from a height of about 2 meters, /ot2*4dm6c)zkd up x qhits 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*w *gq 3cqqig1 speed of $v$ in still water, which of the following trips will take the least amount of time.

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17#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.01: The question refers to the following scenario0 z;q. kf*ec je95rpfet/ :fkt: 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 tobj dd nnke5: myge7 vl qr8k6(kd87a)0 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 tp su9mkk7-s:pgygam qmv6 4()he following scenario: At $t_0$, two cars moving along a highway are side-by-side as they pass a third car stopped on the side of the road. At this moment the driver of the first car steps on the brakes while the driver of the stopped car begins to accelerate. The diagram below show the positions of each car for the next 5 seconds.
Which of the three cars had the greatest average speed during these 5 seconds?


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20#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.04: The question refers to the following scenario: ipn1e7 u)-ln *1mvporAt $t_0$, 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,x -bric 1sih-8 across a horizontal table top and off the table edge. Which of the following would best represent a graph of the magnit b8-1xsch-riiude 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 relations0 oanvw7+/con/sr wp6hip between distance and time for an object that is n /a+rv0psw/ownoc7 6moving 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 disj6c d);ivxd 9t;- pfub:kb j(ctance and time for an object that is moving along a st pfd;k-xcvj) :b9;6bj(i u dctraight 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 saf c/wnt,4,sje2 se6dtraight downward on Earth with an initial speed of 12.0 m/s from a position 10.0 m above the ground. Ignoring air resistance, the speed of the object when it reaches t,/st,wn 4adjsef6e c2he 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 16k 0e m 9u4leja m/eado8njnq9l): lhuniformly accelerating across t6lnjalem)l91e8 :u4a/jkh9m d e o0 nqhe 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 represm.6wi0s p,gsvc6b8up :06 qdunwi,fc ents a toy car starting from rest and uniformly accelerating across the floor. The time and distance traveled from the start q.6ssgi86m,v6bf pd,wcp:c uu0iwn 0are shown in the diagram.
What was the acceleration of the cart during the first 0.4 seconds?


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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.13: The diagram below represents a toy u ( 7 9rtjastz4*:1qutk7 mapfcar starting from rest and uniformly accelerating across the floor. The time and distance traveled from thez479mr1jtu7q(ttk*u a:s afp 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 poh/9d( .gmw78f:u acma jve xo+sition of the ball each second is indi(c.o/ v h uaej:x8m+7wgf dm9acated.
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 shsbeen2:al 4.se sv )i6(b1kjgows a uniformly accelerating ball. The position of the ball each seco1 4.eks2bnle(s v e)bgsa6:i jnd 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 onijr5fgtq7ev:1 ;kp / y a unicycle moving in a straight line is shgre;p vj q/ 5yi:k7f1town 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 circus clown on a unicycle moving in a l1 f n7danyl *f.t;a6tstraight line is shown il.a nn ;ft*ylt67d af1n 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 , g r8eo,oi/d-hu/qan jmi *k(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 g0 tf+it x a(w5:ukpm+amq6 1hrraph describes the motion of a marble on a table top for 10 seconds. For which timep tmt10a+5uf6mk :+qrax wi(h interval(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 accompanyingbhcs-v9v9 1 b10edbn ;cg,zs:6 vyzpj graph describes the motion of a marble on a table top for 1vv syb1-;ndjspcg z :9zcbeh61 b9,v00 seconds. For which time interval(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(b 4msczx -4;nwocl m- 8xkoni:2y(uk graph describes the motion of a marble on a table top for 10 seconds. What is the marbles average acc- :kn-;mno o8lsc((ik 2uxyc 4w4mxbzeleration 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 r(lthq )-*e p mc0wa+koest 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 ax uu*d8edpd2os ,- 1 px:swxr* 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 corr3x1e-vzv, rco ectly represent the motion of an object mo, 1xrv3cz-ov eving with a constant speed in a straight line?


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39#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.24:The accompanying graph describes ,m;2wqs t+ fl4vikmwj *ohl9 8q8y 1swthe motion of a toy car across the floor for 10 seconds. What is the acceleration of the toy car jmy49 ,1qlsmif2 ; 8svh8tlw q wwo*+kat 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 an;py ut+;r0oi toy car across the floor for 10 seconds. What was the total displacement of the toy car for the entire 10 s0 r+ yti;p;nuoecond 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 of a toy car ac cdkjvr711by/ ross the floor 1k1/7bcjvd ry for 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 as8 gnf p,m(69gw (qxk4.50 s. Which one of the following choices best represents the acceleragnxgsk(,mqfw96(a p8tion 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 velocigfdkp01v (ep2ty versus time curve shown. Which of the following statements regarddpvp 0k2fg e1(ing 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 along the x-a0 dhx* cznwg+3xis according to the velocity versus time curve shown to the right. When dx3+gznc*hw0 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, ..xd, 4e-ok(zdadxl)kfs) uja tennis ball is moved so that the angle between the velocity and the acceleration of the ball is kept at a constant 120 degree. Which statement ud4 ded( . x-ajk).)xzkfos,l is true about the tennis ball during this interval of time?

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46#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  07.03: Two automobiles are 150 kilometers apart and traveling toward each oth9ur4 lbbsrwo/6 h4:wd9 wet1ier.uswdt il4w 9b r194ow re:hb6/
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 acceler9vrn yc80lmk5 ation is positive and increclr5k80nmv9 yasing

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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 averajn)-f9g 1p/ xnnslp m0ntz73ege 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 ptj 7em/m4i 8r3 tfq0:f/fkjltw- , jftwo dimensions, which one of the following choices identifies quantities that must have the same direc f8p/e7m4jr0t: kq t lwift-j,mfj /3ftion?

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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 moves3y m 7mw5m8zpxyqn,mv -11vsu $3.0\;m$ to the North in 1 second. The car then moves at $9.0\;m/s$ due South for 2 seconds. What is the average speed of the car for this three second trip?

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51#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  07.05: The position-time, l68 a 3qw-k tmcrggw;8$y\;vs\;t$, 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 time Tlvegg yujktp./457u6r o bc4, y *up,w in two partsu4/ceg56u ygyu .*74bpjrwoktv p,l, .
• 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 g::k7ama /frbg raph for the 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 origin frgm:ak:b7/ a $x=0$. 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 forjtxu/l/uayg 7qe98kqm 0 0iclo+i-+y the motion of a car on a straight track is shown in the dij0c7x/09g/ml qa tiyulk+-oueq8 +y iagram. The thick line represents the velocity. Assume that the car starts at origin $x=0$. What is the average speed of the car for the 10 second interval?


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55#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  09.08: Consider the motion of an object gid;zheh0jzzpt+-d 7s2ty*(bmven by the position vs. time graph shown. For what time(s) is the spe y j(ts -zm; hz+pe*dtbdh7z20ed 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 grt) :9:jwbstzus4xllqil b6 . 62x3yh gaph shown. For which time(s) is the accelerationqb4jxxbs9t tlgl.lw3y )z2:i: hsu 66 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 t xpmy:kikvt:g43k w/ wqn*n2 /he area under the acceleration vs. time graph for a fixed time interval of an object’s motion, what quantity has *i:4tg/q kn:vwwm 3yk 2npk/xbeen 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 hovst og;11z f l1 bhlza.y.6n4f v9nqz9rizontal 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 t)qfysdf;x : x;rip 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 fr i9o+:k3nfwq(ssa i 5iom 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 and reaches the ground in a timb/4 g . y)lmava6ylcll.tk6+ae 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*xzj 2cuqa4 rqc 2z*7d a horizontal axis is shown. What is the total j 7*caqxz*urd2z4c2qdistance traveled by the particle from t=0 to t=10s ?


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63#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.18: Which one of the following choices correctly identifies all of the listedp83nt i:us7xyj6r 0+cp7croo situations for which there is au ry sitcp:+n6xoj78r p73oc0 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 object moving along a line is s a0a;+mpdf8:wyz jxv5.qmzr6 0vm/p shown. The object starts from rest at time t=0 s. At what time(s) does the object attain a maximum displacement from its startvv. ja z x08s/fdp;5wmpyqr 0+ mma6:zing 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 vee1 x ukq*,bmhq (yju-nr v9y1-locity along a line vs. time is graphed. Which on,u1ejnu mkr-v*9(h1 q-qxbyye of the following 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 thwfj0g:k/tu )fc7v r h0e right on a horizontal track, each with constant tj :)chvfw/7 0gkr0u facceleration. At an instant of time, the information about the cars is shown:
Car #1: position = 125.0 m; velocity = 13.0 m/s; constant acceleration = $1.5\;m/s^2$
Car #2: position = 80.0 m; velocity = 9.30 m/s; constant acceleration = $5.5\;m/s^2$
During the next 1.0 second of motion, which one of the following choices best represents what happens to the distance between the cars?

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67#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.14: A particle has *1sic -ji0hebj) a9i ma 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 one :/* ,uztetpbfof(apc y2ce/x5 ;,iif of the following choicetf;5 /auexfoy*c tip2,z:i ,bpf (ec/s correctly 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 thewm-8/b/k 5a-y: k ixxsb n(hob instants of time, at 5yb n aksxh--wi 8/o bk:x/m(bwhich the car 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 tt.ur5us:- ; *-xoj m-tc2;fzw;a5 jpkqfm q awill move along the x-axis. The acceleration vs. time graph for each car is shown. Which one of the following choices correctly identifies the relationship -2tf ujs;w;;q oj-:aaut55cptm km.-rqfz*x 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 j 5i1rkof sh* 1:rl;qmvs. time graph of an object moving on a horizontal line is shown. At what time(s) is the object moving with its greatest spqrj;l 5sr*oh:f 1i1km eed?


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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 g2der7rw8- *p3 9piaotbybcr0-tey(craph provided. During what timy9a0r c7tyrp2* --w3bico8 ed(pebtre interval(s) does the mass have zero acceleration?


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