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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 circular path of radtdt c4iva+7ma;;bo q7 ius $R$, 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 parti4dh* +sw7j ).k wx5eecpb 7gsrcular direction is callewek.*pdj)bs s7cgw4+7e5hr x d

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  12.29: A vehicle completes one lap around a circular track at an average sk0dl1 t* r o(;po*qajdu+2fmbpeed o2q1d t *m*ulfob;a+o jp0 kd(rf 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 moves80vnqz *k1 vuc 0.80 m in 1.0 s at the constant velocity. If it continues, how far will it 0z1v*q8nuk vc 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 sta*l61q r.bahi ife1bdo2( auj.hhw9 *rtionary on a 30-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 the left, relative to the plank. What is the speed of b2druhie19l q*6h(ibawo1r* jf.. ahthe 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 ; 3kis 3xpvlt380 km/h and 400 km at 100 km/h. What is the average speed of the motptikv;3s 33 xlorist 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 hv. 6s(7 *- ygfykcddathe motion of a toy car traveling along the x-axis. The graph shown (dy.-*k hdcv76 ysfg abelow 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 hwq0+e u qh0)jcy:t.o car traveling along the x-axis. The graph shown below is a plot of the car’s velocity in the x directioh qh0.uqj )otwyc e+0:n, $v_x$ 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 traveling along the x-axichr w 2 ra;kw,3x2c/pcz*rikw *vc..e s. The graph shown below is a p*i;r xhw/ 3*2 ewc k,ckpzw.2ravc rc.lot 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 f+p0efc8iat w*lying due south for the winter. At what poip8 fcetiw0+a *nt 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 position ako c: (bzb q9edc:.wk*nd elapsed time of a car starting from rest and uniformly accelerating in a straight line. What was the average velocity of the car during the thi( qc 9bdzw:b *ceo.:kkrd 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 b p r8/ 6;pmk8nbwdvemmbulcyj2 0,a1*elow which shows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. The average acceleration during 2b j0c e*;88m k mb1pwyp6 m,/uvalndrthe 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 o /jxh m:vl/ e0iqnq/11x bi*yof the velocity time graph for an object with the position time graph shown in the diagram at right 1m://vy bqqil h/*1e0inx xjo?


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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 re9e awgaf)7wn -/ntx 2xr5s *l7 enux2bfer to the following information. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor and rebounds to its originalufxe9x n 7-a se)wb *5nt /2xgra2wln7 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 questio7x);9 r(utfl4l6lvox 312bjcee ,a zlkd b:jqn refer to the following information. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor and rebounds to its orlx(z4v 6)u92,obxre bc3d jejf1l ;7akltq:liginal 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 of el-x+ j 7qsv/w$v$ 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 toxy0awx.rk .(k :m w7 pxr1;qme 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.
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 thf-:hs9*(d)r rriee f;rza xv3e 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 referx5c:he;2hbuxu6m c ymg,5+f ss 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 refers to the following scenario: At csc*(m;7a0e( tpez*n k zqd7e $t_0$, 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, ac o;:shzr-0c m-ii0 dtzross 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 accelera :-0im czzi0ohs;t -drtion 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 re: li65:;n) jycysq lq chbdq19lationship between distance and time for an object that is moving along a straight line. What is the inscidnqy b:15j)96:cyq; qhls ltantaneous 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 represe3en 3o o gp:))4v.wsn7u ityq+l vsco6nts the relationship between distance and time for an object that is moving along a straight line3nw c6t vu v4qon .pe)y:)o+i7olsgs3. 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 j,g4f:bvsytw, j w3:h tc)asng* 0up3is thrown straight downward on Earth with an initial speed of 12.0 m/s fj uf03wtg,s3):* n:b hv4tcw,yg ajps rom a position 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 repre qtu5u6bg)jq0938stj,mc2r1kvu r c osents a toy car starting from rest and uniformly accelerating across the floor. The time and distanc,q gtbrju1j tu9uqmc6 kv8r325co)s 0e 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 fr;d v 4(4k*fx9fnsqxbskq n r(;om rest and uniformly accelerating across the flq*xnff(d 4nx(9 k;kbs 4r s;vqoor. The time and distance traveled from the start are shown in the diagram.
What was the acceleration of the cart during the first 0.4 seconds?


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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.13: The diagram below represents a toy car starting from rest and unifork t;n/npm18f.9mit a cmly accelerating 8tci/nt. mapk f91;mn 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 u b.)acm3f5gc oniformly accelerating ball. The position of the ball efc3gma.b5 c o)ach second 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 acceleraq:ne tpa*(v(tn ot0r h.)c/8g x+yphe ting ball. The position of the ball ea(qt: /08tean .yx+vo (t)p p*g hchnrech second 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 unicyclmt ;qw2ak). dc:cq6x ce moving in a straight line is shown in the graph becka.)wq; 62dc: xm ctqlow.
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 uni;r*v9v i2v-i 3jcp c+fh0j-0 g7klzov mym1wocycle moving in a straight line is sh1h0pv7-lvjcyr0-9+i vvj;ifog23m *z kom cwown 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 tht77z7 )vj6ecmkdg 1nlm+; ilbe 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 ta5bt.i b 607r i0bvqzezble top for 10 seconds. For which time interval(st75b bei00v6bi. zqrz) 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 of abpfb** j (6x-lggmtk: marble on a table top for 10 seconds. For which time (*gg6 xpbkb j mt*f:l-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 graph wnj.ar (aw322s /hflqdescribes the motion of a marble on a table top for 10 seconds. What is the marbles average acceleration between t lq2w2j.s/rwa hn af(3 = 3.3 s and t = 3.8 s


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36#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.20: A car accelerates uniformly from rest for a timelj2 u-0k/ asuk go62vm 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 str91gl.wu 3. g/gb evp,6kusns76bk pgvy*i. sx aight downward with a speed of $20.0\;m/s$, takes $2.00\;s$ to reach the ground below. From what height above the ground was the object thrown? Ignore air resistance.

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38#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  04.03: Which of the following graphs could cor90ou;h z+upi erectly represent the motion of an object moving with a consta; hizu uop0+9ent 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 toy8q,si k(sepxjp(s:.h car across the floor for 10 seconds. What is the ac(sxse,qs khj.:ip8 p(celeration 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 mo vvls7ux.2als+ cm4s w/q6 p(ption of a toy car across the floor for 10 seconds. What was the total displacement of the toy car for the entire s.u4mqa(p/v6ss 27w vc l+l xp10 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 of a toy caro/6 b7ucvwxluu jz 9)6 across the floor for 10 seconds. At what times or time intervals must the net force zluu6xu9j7c bvwo/ 6) 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/hrllj7 *e+gr u1qf/; baa to 60 km/hr in 4.50 s. Which one of the following choices best represents the accelerab g7*l + qlj1eaf/u;ration 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 osh .n2xl/o9p gf the following statements regarding 9xnoh /lpsg 2.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-axis according torsu r (ejhgr ;hy*,55z the velocity versus time curve shown to the riyer(j*r;h5 r ,ugzs5h ght. 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,7x 5u7a s+jaeifes90na/ki y2 a 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 is true about the tennis bas iieey j ak/7a2n7 0u+9afsx5ll 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 automobileswc.x.tl fkpf-68w5j u are 150 kilometers apart and traveling toward each other.5l6kwf- 8.u.jxfp cwt
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-urov 9d- urlb831xwm 7axis. When the acceleration is positive and increasi mu1wdu893l-r7roxvbng

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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 averatyz tbxj2wnzx*7v;-h.gy9 etsi0 ) . y) nvzt;ge 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 fyrxo7*x/ 59jw bgbv.ggel 2+kollowing choices identifies quantities that must have theg 9 x*7b.jv+xgl2ky/rge5bwo 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 movywc snxy6ld jp9 .f;6 b8mgs;:es $3.0\;m$ 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-j2( yod3h/poy 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 thr)/ pwbckj5(ur hi )n6e right along a one-dimensional track for total time T in turn)c6 )p iw (h5r/jkbwo 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 i-b wi3un r(o+5vs* erfor the motion of a car on a straight track is shown in the diagram. The thick line represents the velocity. Av 3re5*snri+( i-uowbssume 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. t6oy2k;w-tjn+g p s)rjime graph for the motion of a car on a straight track is shown in t knr2;pow t s)yjj6+-ghe diagram. 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 given by u0ou9: :ryq gythe position vs. time graph showr o9g:0u :yuyqn. 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 objt bpy4l3+i5u v 4l0lyz,ir9p zect given by the velocity vs. time graph shown. For which lp4lzt,yui30p+bl5irz 9yv 4time(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 undeodk+/: sgv(wliag e2 2 xt6ys2r the acceleration vs. time graph for a fixed time interval of an ob: 2vo gws6( gisl22dyx /a+ektject’s motion, what quantity has been 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 increasing sysf25oy seu,qe0e4 *e2p ygc)peed.
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 two part5u*zdq5 7x mno(owm0es:
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 reaches the ground 7r ovuy7w5:9a:j rzvny b-az3 *;hiluin 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 rec q5u *;/h7 aqfusgwi-aches 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 + l4jfg13p zyn v rrd s13:,-fneyzs*jhorizontal axis is shown. What is the tnps1v3f syjd*j1ln:yfrz, r +e43z g- otal distance 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 choiy+ 4;i(t e xn6ykhn9kices correctly identifies all of the listedeyty n;k k+xh9i6n4 (i situations for which there is a non-zero acceleration?
Situation I : A point object moves in a straight line with increasing speed.
Situation II : A point object moves in a circular path with constant speed.
Situation III: A point objects moves in a circular path with decreasing speed.

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64#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.32: An acceleration 4u9fx)0upcc cvs. time graph for an object moving along a line is shown. The object ) 90fcupc4cx ustarts from rest at time t=0 s. At what time(s) does the object attain a maximum displacement from its starting position?


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65#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.17: An object starts at the origin and its velocity along a line vs. time i, *-ovog r-swvt;(h cks graphed. Which one of the following choices best gives the propr,-oh;oswtg vc -k* (ver 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 tvzenn wz*w ,y ;o3/; i*uplw-khe right on a horizontal track, each with constant accele3w*,kz;u zo e*invww;-l n yp/ration. 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 a posivn egyg:*:3yei -jkb.tion $x$, 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, whiclggwf/s ;p o i5e/+h:p;8kf7bl4 bqlp h one of the following choices correctly describes the relationship between the average spe /kwl l;pi;sfo gb4gh5fp e7bp/q:8l+ed 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 f s 9s4i/*jbnjcollowing choices best describes the instants of time, at which t9*j/b sinc j4she 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 will move along :a ao,2 ru3 y k4owkrrigl73.athe x-axis. The acceleration vs. time r,47ro3a ul ioaw2: kak y.rg3graph for each car is shown. Which one 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 graph of an object moving on a horizont9bia w(:d3.fqkw *bc nal line is shown. At what time(s) is the object moving wit*:db ic(9qwwkf.n ba3h 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. tii:mum f lf;x.5 nloa15me graph provided. During what f5foxm5:nl ilu 1;m.a time interval(s) does the mass have zero acceleration?


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