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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 a7bwffgws 4jq,n). +sa 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 without repi9 a0eij,ws 7ference to a particular directionipa 7,je0w9si 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 iw/ 0q:bwf6ik circular track at an average speed of 50 m/s and then completes a second lap at an average ik :wf 6/bq0wispeed 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 velocity. If iwn(m :7n3c5pkckmn r)2h se* 9g5fnmnt continues, h75n3 emmk5 )fsn*wkn n(gnpc9mc2h:row far will it travel in 3.0 s?

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5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  05.34: A 40-kg boy is stationary on a 30-kg plank that is sliding at 5.00qby5oesxv c7w2s8d: na8u .j8 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 pla ey8oa bv87j :xusswcq5.n8d2 nk. 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 anhhsyc3 u0 7f9ud 400 km at 100 km/h. What is the average speed of the motorshu cy9 3uf07hist 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 refer /m m;tos glm0:cf:w0ls to the motion of a toy car traveling along the x-axis. The gwmm tf:m0s0/lc; o:l graph shown below is a plot of the car’s velocity in the x direction, $v_x$ versus time $t$.
During what time interval was the car moving towards its initial position at constant velocity?


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8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  97.21: This question rt)yueyl *p v2:rnp*: fefers to the motion of a toy car traveling along the x-axis. The graph shown below is a plotyerpf yp n*u:l v2:*t) 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 refwwrf- hi2uyg-obu*w9q fl;85 rz1k/gj( bl n3ers to the motion of a toy car traveling along the x-axis. The graph shown below is a plot of the car’s veloci8ig*r;/u fqj( z n1hob5 yllfg9ur-kwwb3-w2ty 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 o-3f 3 ywzk6y ,ujcgc41k0dfuwf the velocity vs. time of a duck flying due south for the winter. At what point did thfgczw 0-y33ckyd4w,uf1 6j uk e 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 b*h+g4mgfy( c.uka e m/elow which shows the position and elapsed time of a car starting from rest and uniformly accelerating in a straig.fkeyu hmc4(*gam+g/ ht 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 ujt tx8//iqf-h9lhr:n*aj1tto the diagram below which shows the position and elapsed time of a car starting from raf8 :t1-tx9lj/urht q j/hn*i est 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 ofyk9-o; niye16gales1r8moi i12dbc- the velocity time graph for an object with the position time graph shs9eaiocbigo-dy;l1k 1ni2-6y81 m reown in the diagram at right?


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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  00.28: The following question refer to the following information. An ideal elfcif -a m7; v2b4 rxrve;wiv-mg3d.4nastic rubber ball is droppmm e.nxfv v;d-44 r;vbi 3ra-fi7c2wged 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 folm)xv3djl;qg 5lowing information. An ideal elastic ruvg j)qmx3;dl5 bber ball is dropped from a height of about 2 meters, hits the floor and rebounds to its original height.
Which of the following would best represent acceleration versus time for the bouncing ball?


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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  00.39: If a boat can travel with a speed ob vfqlja/zo+9* q p53cq ,rlx,f $v$ 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 +ekto;3 h: kzirefers 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.
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 fol .k h88jbygr.glowing 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 following sc2nh) p fky4 *nveidh,8enario: 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:tdgsd5bt9+*gab0qu/9r un d scenario: At $t_0$, two cars moving along a highway are side-by-side as they pass a third car stopped on the side of the road. At this moment the driver of the first car steps on the brakes while the driver of the stopped car begins to accelerate. The diagram below show the positions of each car for the next 5 seconds.
If car #3 continues to constantly accelerate at the same rate what will be its position at the end of 6 seconds?


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21#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.33: A small ball rolls down a ramp, across a horizontal table top and off theef kt:. k;* fewhjjujf;i:*-0mcue-kzfax11 table edge. Which of the following would best represent a graph of the magnitude of the ball'e :tekkfi: 1k.fjxcu-w1fj0;*-;* hf emzauj 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 relationsi;o* x, dq fvb8q4o;fxhip between distance and time for an object that is moving along a straight line. What i,xqf odif4;o 8 q*vbx;s 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 rep)8h9d4 efcyg e a;hs5m0cz,lnresents the relationship between distance and time for an object that is moving along a straight line. Between what times did the object have a 9f)d5lhmaenz h, 4secgy ;c 80non-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 str7 r /-wf9*fpi;fn : eqwvgxx5eaight downward on Earth with an initial speed of 12.0 m/s from a position 10.0 m above the ground. Ignof5f xe9n /7*w;ifrg xqew :v-pring 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 toy car s(lfu2,rc,wt20soss mub -x o: tarting from rest and uniformly accelerating across the floor. The time and distance traveled from the st(-sbtssuoru, x0 2:fm,2clo wart are shown in the diagram.
What was the average speed of the cart between 0.1 seconds and 0.3 seconds?


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26#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.12: The diagram below represents a toy car starting from reioaf2cft h m7d tt17l 9r8+.ngd y*y0yst and uniformly acceleratinc yr 8 y ntodl9tt*a7hd7 +ffg21i.y0mg across the floor. 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 9eosg,/cgyy17 bu7-;khj fdm+o+set a toy car starting from rest and uniformly accelerating across the floor. The time and distance traveled from the start are shown in the diatso7db71gyeh e/ ku-c + ,; m+9gjysofgram.
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 pokqk6 8ycm u7i/sition of the ball each mkkci /yu768q 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 unifo*l-09ch zi-pcm.d.up)h r0roy7 ats frmly accelerating ball. The position of the ball each seh afldsiyhcot)*z- -79pc .0 prr0u.mcond 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 lz jt nen58ndx0o7x 5n741k uzclown on a unicycle moving in a straight line is shown in the graph belo8n 54ln0xn7ze5n to1zj dx u7kw.
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 stra.9uzh:hjpojm3 :s;l oight line is shown in thh o3lzs: .p9om:j j;uhe 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 ns:sj7,twz c* fear 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 o 3k-o6l+ax+o gvyah n-sxp;.on a table top for 10 seconds. For which time interval(s) did the marble have a negative velocih3kv- 6o.oa xopgynsl+ a;+-xty?


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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 gratu:9sm uj5d m:vkh8 l it/pc(0ph describes the motion of a marble on a table top for 10 seconds.hp:m(8mc ult uvt0:/kdj 9s5 i 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 graph describes the motion of a marble on a table top fo1:t .8 yuccl.8tddrx jr 10 seconds. What is the marbles average acceleration between t = j cdt ulx. c.ry:td8183.3 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 tm(e:(7i-f a z9uhrh(z jm:jvpime 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 strach7m :qx9pzwa z,)* gikmi9 r0ight 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 correctly represent the molxm a4zdus9.n.wf3- ztion of an object moving with a constant speed in a straight l zlswadu3m.f 9. z-xn4ine?


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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 floo(rx*2ow.i 4yv r 0mjb3uko8x ur for 10 seconds. What is the accelera b(k3u0 i*yxm4 j wrou2ox8vr.tion 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 thefk c5c9(bzh,8 x4qgop motion of a toy car across the floor for 10 seconds. W 49f 5qzpcbohg8k(xc ,hat was the total displacement 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 the motion of ukr hhlszsh88(kd(h/ i/ l,v 4a toy car across the floor for 10 seconds. At what times or time intervals must the net force onhh8(z/ s8v4rhlhkuk/( l sd,i 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 ; ulfk63,r1qdq xda 1 1xfzcq5s. Which one of the following choices best repd531rq 1zxuf qd cqfa,1k l;6xresents 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 following,f wwnsc7)i)p6dsq bnf3 is+: statements regarding its motion is NOT CORi 3 n+6sin)pfw7cs:,q fwdsb) RECT?


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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 trgif)l /pla7 ;,q hhe7o the velocity versus time curve shown to the right. When does the car have zero acceleratio/ g77 qhha ,il;pe)rlfn?


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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 the a. kta9e y,)xwfreraqg:8 s*j3ngle between the velocity and the acceleration of the ball is kept at a constant 120 degree. Which statemenrgj) tk.e*aqysa9w e 8,3:frxt 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 q1 p *nm-iab ka22tex7apart and traveling toward each other.2* qx-e7btin ma 2pa1k
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-a2vdo y gmpev(v63 ;s y3-tl)vlxis. When the acceleration is positive and increasiny vv t;2ms3 ()ld-vlgo3p6yevg

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48#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  07.12: The definitiojo yl6m:; bu46bp0dz 9,bndfqn of average 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 following choics8 1ekzh svelq, 0 ;wnla87*uges identifiesu* s an ,qkl7h1s8w8glv;0z ee 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 move-3d/g utmo,iluqtl; 8tw* :aj s $3.0\;m$ 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-t/qha.ph t7mc -ime, $y\;vs\;t$, 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 alongyt6kw; zx)i -n9 e(noz a one-dimensional track for total time T iz6o n ;x9ky-z)in (tewn two parts.
• Part One: The car maintains constant non-zero speed V for the first $\frac{3}{4}$ of the total time.
• Part Two: The car accelerates uniformly to rest during the last $\frac{1}{4}$ of the total time.
What is the ratio of the distance traveled during Part One of the trip to the distance traveled during Part Two of the trip?

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53#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  08.23: The velocity vs. time graph for the motion of a l 3zwlsp6/ rl:car on a straight track is shown in the diagram. The thick line represents lr:zwl 63s/pl 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 la1dru:kb02zljr 0l2 h: sf:ga straight track is shown in the diagram. The u0fgl:2z:h s r rd:lljba201kthick 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 b265 iacnhttb/y the position vs. time graph show ctt26niha 5b/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 object given by the velocity vs. time grapzigk-yr k(an ,e5-ks: h y7a28fu.zxdh shown. For which time(s) is the accelex 2(k- ekah7- iz8z ya:,5 usyngr.kfdration of the object equal to 0?


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57#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.24: By computing the area under the acceleration vs. time graph for azm.a: 3;0ui+5(k k + sikho sqwf3vbfx fixed time interval of an object’s motion, what quanti3(f+ sfu;misvwho:. 5ax+0ik qk kz3bty 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 movi g1pxjngg6m(gl75u 3es along 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 tl*oc). oiauq+6xjx o os.;r c)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 from rest and reaches the ground inqx3cy*hd d.s9 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 i bvh,n9h+ jc 12;oee hv-owc8ls released 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 particl gk.7lv8xq9nh z2uxd.e moving along a horizontal axis is shown. What is the tz.2 9dxu qhnlxg8 kv.7otal 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 choices correctm939xi c0ey ,l : tujcsi;;vdaly identifies all of the listed situations fo:iy ;metjc099saci,;3dx lv ur 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 vs. time graph for 1.sgqmk :zi6,pgb ck 3an object moving along a line is shown. The object starts from rest at time t=0 s. At what time(s) does the object attain a maximum displacement from its:gcz mgp1s ,b kk3q.6i 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 vesr+q ;y.lw07 b /)b ba6jybmxglocity 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 away fromb. w) rbab;xy lqjbgsm+/0 7y6 the origin?


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66#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.09: Two cars are moving to the 3f684ztj8y lpsi qq3p right on a horizontal track, each with constant acceleration. At an instant of time, the information about theq f6i3j p438ylsq zt8p 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 position 5;il vg.0rmn5e.bls5y ( ulzj$x$, 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 of the fol9f v-qg9t7js)oxl (t+j fdk k*lowing choices correctly describes the relationship between the average speed k9(t)dsklf7o 9xtj*j + gq-vfof 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 dex3/7n p- 4u 0h/zdkaybxrogw ry47r (nscribes the instants of time, at which the car and truck tra rxb(yw4-y0hou grpd7z 3ar nx 74kn//vel 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 wsqwgr.i.o ::liv)/zQ, each start from rest at the origin and will move along thes.q:ro iiww lz.:/)gv x-axis. The acceleration vs. time graph 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 ar h d h97ccj5zs6acd5+ horizontal line is shown. At what ch shzdcj9+5c 6r7a5d 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 follc; 6o6r(k89 yamvl bhqowing the position vs. time graph provided. Dur9ho y l 8;qr(mabc6kv6ing what time interval(s) does the mass have zero acceleration?


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