题库网 (tiku.one)

 找回密码
 立即注册

 

      

上传图片附件

未使用图片

小贴士: 允许的图片文件格式为: gif, jpg, jpeg, png, webp,上传完成后会在上方生成预览,用鼠标连续双击缩略图,或拖动缩略图,该图片就被绑定至本题,显示在题目下方

本次作答已使用

小贴士: 此栏目显示的是当前作答使用的所有图片,绑定到某一题目的图片同时会显示在该题目下方; 删除使用的图片会将其转移到<未使用图片>类别


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: 匿名未登录  开始时间: 24年03月31日 09:50  切换到: 整卷模式

标记此题
1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.10: A particle travels z1fd w:) ffia(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?

参考答案:    

标记此题
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 referenc0v;ub0 r:t ojwe to a particular directtv:ru j;0 b0owion is called

参考答案:    

标记此题
3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  12.29: A vehicle completes one lap aroufb, a0ywg4.mind a circular track at an average speed of 50 m/s and then completes 4im,a ygwb.0f 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?

参考答案:    

标记此题
4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  95.03: A toy car moves 0.80 m in 1.0 s at the constant veloc+x; bp2n rie3 *:ly1rpw 3bmqhity. If it continues, how far will it tp b21qy3n:*w; elrip+r3xm hbravel in 3.0 s?

参考答案:    

标记此题
5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  05.34: A 40-kg boy is staticaghbis 04pf)7 o0y6 oonary 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 lgsb6f40h7c 0) oyopiaeft, relative to the plank. What is the speed of the plank relative to the pond now?

参考答案:    

标记此题
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 atonq /8dlbue:* 100 km/h. What is the average speed of the moto8/dluoebn:q* rist on this trip?

参考答案:    

标记此题
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 traveln9eb622qnfe d ing along the x-axis. The graph shown below is a plot of the car’s velocity in the x direcne 6e2nqdb9f2 tion, $v_x$ versus time $t$.
During what time interval was the car moving towards its initial position at constant velocity?


参考答案:    

标记此题
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 t .+srgi zi w*/s y2:oo9sms-vsl1bv ;car traveling along the x-axis. The graph shown y wsg:mvzs*v/ s+tlbi so ;s-r9o1i2.below is a plot of the car’s velocity in the x direction, $v_x$ versus time $t$.What was the acceleration at 33 s?


参考答案:    

标记此题
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-axinn 0q2g+ezz j vh5p9*bs. The graph shown below is a plot of the car’s velocity in the x direction, 9jz2*+5 g bn0pvzhqn e$v_x$ versus time $t$.
How far did the car travel during the first 15 seconds?


参考答案:    

标记此题
10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.15: Given the graph of t d y)q of,n9x;:te4utphe velocity vs. time of a duck flying due south for the winter. At what point did the duck stop its forward x4dp:;fneo, u9 qtty)motion?





参考答案:    

标记此题
11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.17: This question refer to thrn w1vdah0(6j7epz )he diagram below which shows the position and elapsed time of a hz1p(w0v nj6 h7)ardecar starting from rest and uniformly accelerating in a straight line. What was the average velocity of the car during the third second?


参考答案:    

标记此题
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(ldn/dr7n b, lkz).y l shows the position and elapsed 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 d)l r,(7d/yzkn l.lnb to


参考答案:    

标记此题
13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  99.20: What is the shape of348gswix:ia e 3o/hyo the velocity time graph for an object with the position time graph shown in te8oiy 3x saw/4g:h3oihe diagram at right?


参考答案:    

标记此题
14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  00.28: The following question refer to th;(2s0ogfs gex x:9p yfe following information. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor and reboundx;sg fx:o(p y2fe g09ss to its original height.
Which of the following graphs would best represent the distance above the floor versus time for the above bouncing ball?


参考答案:    

标记此题
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 infor08-ynhy i(m;1g3 04g treetk dkym7vh mation. An ideal elastic rubber ball is dropped from a height ov0 k y8my;-4 ietkt0yd3gr1 n7h(m hegf 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?


参考答案:    

标记此题
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 s)a,(w5cqk7o q xmanr/peed of $v$ in still water, which of the following trips will take the least amount of time.

参考答案:    

标记此题
17#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.01: The question ref2,ss9fz/ a5pe+vlmny zr+ +k:ym q2o lers 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?


参考答案:    

标记此题
18#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.02: The question refers to the following scenario:j0b un)an6nv*:bxer) 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?


参考答案:    

标记此题
19#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.03: The question refers to the follo*p 8mel0 dc5cewing 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?


参考答案:    

标记此题
20#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.04: The question refers to the followu,mfnqi7n tz3n3wi9 6 ing 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?


参考答案:    

标记此题
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 to2nr.kgm kmv,88:vp3hgb) ae u p and off the bmve2g) 8kvmg:a.8hrunk ,p3 table edge. Which of the following would best represent a graph of the magnitude of the ball's acceleration vs time?


参考答案:    

标记此题
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 dir: m 4+tdqg4ahstance and time for an object that is 4d+gmt ha:4rqmoving along a straight line. What is the instantaneous speed of the object at t = 5.0 seconds?


参考答案:    

标记此题
23#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.02: The graph represents the relah:(j/oe bey :itionship between distance and time for an object that is moving along a straight line. Betwee:/h(b:oij ey en what times did the object have a non-zero acceleration?


参考答案:    

标记此题
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 initi8ep s),0*i 5c )q 3ldmvjttlj+x)pkf wal speed of 12.0 m/s from a position 10.0 m above the ground. Ignoring air resistance, the speed of the objectpc5 3q +ti vxe pk8dw0ml*)sj )fl),tj when it reaches the ground is

参考答案:    

标记此题
25#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.11: The diagram below represents ay 7utu-d3b px+ toy car starting from rest and uniformly accelerating across the floor. The time and distance traveled from the start are shown in the diagrad u u7yt3b+-xpm.
What was the average speed of the cart between 0.1 seconds and 0.3 seconds?


参考答案:    

标记此题
26#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.12: The diagram bd3 h6/7fq mt3wecjf aodn*h 2(elow represents a toy car starting from rest and uniformly acne/f h ho7 w3*2jqt6fad(3 dmccelerating 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?


参考答案:    

标记此题
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 cw)e mt)her w5ig u4/h3ar starting from rest and uniformly accelerating across the floor. ugth)ere/h54wmwi 3 )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?


参考答案:    

标记此题
28#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  04.08: The diagram shows a uniformly acce8czvds-7,3ld b ye j1vlerating ball. The position of the ball ea,8v vd1ly3s jcbed z-7ch second is indicated.
What is the average speed of the ball between 3 and 4 seconds?


参考答案:    

标记此题
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 of the .5 n6ta24jcuuda6q01/g uef 3o veg vqball each second is ivaajg 3652 duqogq614tnueec/0. vu fndicated.
Which of the following is closest to the acceleration of the ball?


参考答案:    

标记此题
30#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.17: The motion of a ciru- fm e)o(miq0cus clown on a unicycle moving in a straight line is shown m(uei)q-0omf in the graph below.
What would be the acceleration of the clown at 5 s?


参考答案:    

标记此题
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 mov uodg1cw+/t k:ing in a straight line is shown in the graph below. wu+: /t gdcko1
After 12 seconds, how far is the clown from her original starting point?


参考答案:    

标记此题
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 af pt7:phpz* 7u vacuum near the surface of the earth

参考答案:    

标记此题
33#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.11: The accompanying graph describes the motz:xu3slikbji:*6 -g 5 ci xbp1ion of a marble on a table top for 10 seconds. For which time interval(s) did the marble have a negatiic:x5gplxs i iz1ju:6*bkb- 3ve velocity?


参考答案:    

标记此题
34#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.12: The accompanying9xm 1yx onaus*5 8:n2osj8ibj graph describes the motion of a marble on a table top for 10 seconds. For which time8 ys2 b8o1x*5 xn:ou9nmji ajs interval(s) did the marble have a positive acceleration?


参考答案:    

标记此题
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 mar2wg/* l(zovi is ij:e,ble on a table top for 10 seconds. What is the marbles average accii v2*w ils: gj(,zoe/eleration between t = 3.3 s and t = 3.8 s


参考答案:    

标记此题
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 fo y h5qtn18qp0 4ywhmt:r a time of $2.00\;s$ through a distance of $4.00\;m$. What was the acceleration of the car?

参考答案:    

标记此题
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;n w,oqi ;5jk6ll;l ik 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.

参考答案:    

标记此题
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 -d8j az;fzd z8motion of an object dzz 8-zf a8j;dmoving with a constant speed in a straight line?


参考答案:    

标记此题
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 ai od e01s7m3y0-p,skdydfu2/b (vnd p cross the floor for 10 seconds. What is the acceleration ofy d3y0bd f0 sidno/e ds2m(v- ukpp,71 the toy car at t = 4 s?


参考答案:    

标记此题
40#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.25:The accompanying graph describes the.m) p-g-unrvsmug,ke 9b15 q t motion of a toy car across the floor 59g,b )mueptkrmungs.- q-v1 for 10 seconds. What was the total displacement of the toy car for the entire 10 second interval shown?


参考答案:    

标记此题
41#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  03.26:The accompanying graph describes the tipf3 / )wjnveg;s19wmotion of a toy car across the floor for 10 seconds. Ae9wf j;1gw s3int )p/vt what times or time intervals must the net force on the toy car be zero?


参考答案:    

标记此题
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 t0t; usrk-9l9. rdnv6v8e f8r dl,yfnk o 60 km/hr in 4.50 s. Which one of the following choices best represents the accelera-ktnv9de 6rrs l;,dy9n0l88 rvk. ffution of the car?

参考答案:    

标记此题
43#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  06.07: A car has the velocity v0g:p wu .mo7mcc awo8k2:q yt)ersus time curve shown. Which of the following statecuy 7m:p kgww :. am8c2to)qo0ments regarding its motion is NOT CORRECT?


参考答案:    

标记此题
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 acc* xdzyvx4u+;zq .mr8 nording to the velocity versus time curve shown to the right. When does the car zvd;mu . x4z xq8n+*yrhave zero acceleration?


参考答案:    

标记此题
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 tennisin5:ork(pr1 rb o g9f)/g-lxn 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 abg /(n 5nxr-:rkf r9oilo)b1gpout the tennis ball during this interval of time?

参考答案:    

标记此题
46#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  07.03: Two automobiles are 150 kilometers ap,w/x*rz3k efd1h3i as art and traveling toward each other.a1k,fxz/drsih w3 *e 3
is moving at 60 km/h and the other is moving at 40 km/h. In how many hours will they meet?

参考答案:    

标记此题
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 acceleration is positive andw.zj.k6 y :qkq.t rkls0u*o*s increasing0l.k6:s.yq* ztrukk qs j* .ow

参考答案:    

标记此题
48#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  07.12: The definition of average velov,*vdmol;p6.i ;9 dqlqud1 drcity is

参考答案:    

标记此题
49#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  16.18: For any motion in two dimensions, which one of the following choices iyj *8*r.p yp.*oe, vyovf7nte u+j*videntifies quantities that mpefjnv uevt.8ov**+ p*y oj7y*ri.y,ust have the same direction?

参考答案:    

标记此题
50#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  09.17: A toy car move 03+um6;15mvdsedv 5gev1xmf nx7fqus $3.0\;m$ 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?

参考答案:    

标记此题
51#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  07.05: The position-time, c/klwdl:wlmnw. 5 4n:$y\;vs\;t$, graph for the motion of an object is shown. What would be a reasonable equation for the acceleration that would account for this motion?


参考答案:    

标记此题
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 on69koavx 5d e i)yn-o9ie-dimensional track for total time T in two pard)ke xoi no-y99iv a65ts.
• 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?

参考答案:    

标记此题
53#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  08.23: The velocity vklpfhve rs :98c6f v56s. time graph for the motion of a car on a straight track is shown in the diagram. The tfp vs9k68:ev5cl r6hf hick line represents the velocity. Assume that the car starts at origin $x=0$. At which time is the car the greatest distance from the origin?


参考答案:    

标记此题
54#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  08.24: The velocity vs. time graph for the motion of a car on a straigh bpai rf*cyvcl,93 n+0t track is shown in thyb+pn3, *va l0cifr c9e 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?


参考答案:    

标记此题
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 the position vs. time graph sn/ufh9 onnr .-hown. For whrnun/h- fon 9.at time(s) is the speed of the object greatest?


参考答案:    

标记此题
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.8apgy9g ,df(whna/ sjq1e6c i3as2g2 time graph shown. For which time(s)w g 63s2n/h1 qjciya apef98,(s2dgga is the acceleration of the object equal to 0?


参考答案:    

标记此题
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 accellxlqyru/71 c)ov21fg:, (tgly uz 4baeration vs. time graph for a fixed time interval of an object’s motion, what quantity hu /a7,2l qrlc xy4zb1ov:l yf(ut gg)1as been determined for that object?

参考答案:    

标记此题
58#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  11.08: An object moves along a horizontalymi0tj - f* :l1/uy pcm33w gac7tdzr6 line with increasing speed.
choices could represent the signs of the velocity and of the acceleration for the object to achieve this motion?

参考答案:    

标记此题
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 pf8t1-py2vs/ umcnbp 2 jul2j. q3g iy4arts:
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?

参考答案:    

标记此题
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 andjq6/fi,axv4 hvdvxv x.8wy -l:yy5 e9 reaches the ground in a time of $2.50\;s$. Neglect air resistance. With what speed does the object reach the ground?

参考答案:    

标记此题
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 az 7-wdckg3 1dl:t:gc sdd/6kbnd reaches the ground in a time of $2.50\;s$. Neglect air resistance. From what height above the ground was the object released?

参考答案:    

标记此题
62#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.17: A position vs. time graph of a particle moving along a horizontal axiurddu r ul o3 mpw1)-dw6*w,o3s is shown. What is the total distance traveled by the particle from t=0 to t=10s ?13 3,*)rd owwwdulpu umd6o-r


参考答案:    

标记此题
63#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.18: Which one of the following cbcc iu25s qx8c) 3ys .0yemr2khoices correctly identifies all of the listed situations for which there is a non-zero accc5)s2.u0y 28xyq eck b3i scmreleration?
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.

参考答案:    

标记此题
64#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  13.32: An acceleration vs. time guix-*j6t ;akxk63 fxx ghmw,:raph for an object moving along a line is shown. The object star xmk36x-*,xa x;w jh:t fku6igts from rest at time t=0 s. At what time(s) does the object attain a maximum displacement from its starting position?


参考答案:    

标记此题
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 2,*jm fko * f om1xp* *hck,nke: b7zhmi:yj0zis graphed. Which one of the follmokz,*,0p*i bo7hk1fn 2h e*mmy : :cjjxkfz*owing choices best gives the proper interval(s) of time for which the object is moving away from the origin?


参考答案:    

标记此题
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 right on a horizon d/; obfcc4*t kusy(+ctal track, each with constant a*/+od4cc tkfy(ubs; ccceleration. 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?

参考答案:    

标记此题
67#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.14: A particle has a ppl l3( s3)5,9z8t vcvbkiyjors4 di -x 9s.mbposition $x$, 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.

参考答案:    

标记此题
68#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  15.41: For the entire tin gllv ny d.h+o1jzg-e366 of54cdp7gme shown in the graph, which one of the following choices cde5v3- chg746no6jno gy g 1p zlld+.forrectly describes the relationship between the average speed of the truck to that of the car?


参考答案:    

标记此题
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 deja xrwt7v1:xbj09; tfscribes the instants of time, at which the cawtv fbt9;xj 7rja0:x1 r and truck travel with the same speed?

参考答案:    

标记此题
70#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.30: Two cars P and Q,bvz tr- ,h.zc3s ;pkf.cbcd6eg18n5 a each start from rest at the origin and will move along the x-axis. The acceleration vs. time gras.z. cz36enc rb8f,;pcvbkg aht5- 1dph 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?


参考答案:    

标记此题
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 o5dbz ;uxg 5n*m5 mh4fmn a horizontal line is shown. At what time(s) is the object moving with its gnhmu5xbmf;4 m*d5g z5reatest speed?


参考答案:    

标记此题
72#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.08: A mass moves along txtqi6au df6;( he x-axis following the position vs. time graph provided. During what time intef6ti ;x d(6uqarval(s) does the mass have zero acceleration?


参考答案:    

  • 答题人:
  • 总分:72分 及格:43.2分 时间:不限时
    未答题: 已答题:0 答错题:
    当前第 题,此次习题练习共有 72 道题
    本系统支持习题练习,作业与考试三大模式,作业考试自动评分,成绩排序一键导出,可设定动态变量同一试卷千人千题
    如果您对本系统感兴趣,想加入我们或者想进行任何形式的合作,请加微信 skysky1258

    浏览记录|使用帮助|手机版|切到手机版|题库网 (https://tiku.one)

    GMT+8, 2024-10-6 21:15 , Processed in 0.439207 second(s), 165 queries , Redis On.