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 at a constant speed around a ciz;+sh nhrgv+2rcular 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 withoixkn/- s nba8:fz6+ pxut reference to a particular dire b kfnza-x6i+: s/n8pxction 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 around a circular track at an average speed o kpvbpdf:ad ;/ zic*t ku2 7w/k,q6rq)f 50 m/s and then completes a second lap at an average sta:pqpkk/6)c2d qz kw;,*/fiu r7 bdvpeed 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 -:qcy0 rm.,xuu 8uzoo m in 1.0 s at the constant velocity. If it continues, h0uu-,8y:x .qumc zro oow far will it travel 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 stationary1b ddlp j:0l/xey k3xz )+:z :yt z9gzbol5l;m 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:pm3: b)dyg0xzl;zez xk9d l+ l :1lyb/jot z5 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 437m gzq+ catt(vmc4 0x00 km at 100 km/h. What is the average speed of +43cvmgxqa7 zt tm(0c the motorist 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 traveling along afsp81z+bzr n1z 1p9y the x-axis. The graph shown below is a plot of the car’s velocity in the x 1byp1 zrz 89fz+n1sapdirection, $v_x$ 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 x e,zb,e4 o1hib( 4zxato the motion of a toy car traveling along the x-axis. The graph shown below is a plot of the car’s velocityz ,x ex(azb4 obh,14ie 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-axfunkz9 o ;2xhob:equ c47x (o6is. The graph shown below is a plot of the car’s velocity in the x direction,2 z4n7c:xkou6h9x u o;qbef(o $v_x$ 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 the velocity vs. time aj aa67gkvik znypjjp5k29 -9+ly2a 1 of a duck flying due south for the winter. At what point did the duck st6kaa nyzjg15kk-a ji7 9 yj+l2a9v2pp op its forward 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 the diagram below which show9giei ox64:kv i i1f3zs the position and elapsed time of a car starte zok 64g9ix1i 3fvi:iing 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 shows the position and ela;y+ rcsz48cck0)gm+r - gpvus1f bz8n psed time of a car starting from rest and uniformly accelev0cgpms4r 8;znzcrfcb8+ gy)+k -u1s rating in a straight line. The average acceleration during the entire 3 second interval is closest 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 of the velocity time graph for an o/as diea( hn) 0jp0ydu76 slj:bject with the position time graph shown inpsleddy0a /nasj7h6 ( i)ju: 0 the 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 the followinmjvm+y;* l3wj94d(u2e roykn g information. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor and rebounds to its origiyjlnk yv;9*j3e 4o(wum2+ mdr nal 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 information. An ideaph d:)swf .8trl elastic rubber ball is dropped from a height of about 2 meters, hits the floor and rebounds to its or.8 fprhs :)dwtiginal 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 ax*d lewv,uzl*2a /, ud09ne jd0om.un +pk x:u speed 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 refers to the following m1iib8.w3kyescenario: 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 scenarif xu c -tq0e.lbwx)36io: 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 following scx41q -qh9bdcl z77ucai: iw- v/oz2q ienario: 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 t d3v*9glx5oj9io a )-ftbyf f)o 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.
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 v 6elz+e ogr )yk3h5v/a ramp, across a horizontal table top and off the table edge. Which of the following would best represent a graph of the magnitude of the balokvz3 /yghvr)l 6+5 eel'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 distance and qfjzd2p;t+n-t5d9h0 /gqz(h lph;a ptime for an object that is moving along a straight line. What is the instantaneous speed of the object at t = 5.f5 t +dq0t9n;h dzz-gjq ph2/(alphp;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 relationship between distance and time fojv)i:/augc(y6x ok1)( k gldar an object that is moving along a straiggc :)xuyg61aivod(/j ak() kl ht line. Between 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 w8x6tf-9 x0x;;s)i ws:z bumi v-fanmhith 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 v-ix9sbfa-6z 8hm0fsx t:xwn; im;)u 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 a toy car starting from rest and uniforqfh )klju;vmk)9 (4thsq(e m;r r/ln (mly accelerating across the fk mf sntlj9l(er)(hm r(;h)v q u/4k;qloor. 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?


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 below represents a toy car st7b+s3cm x xxj(arting from rest and uniformly accel3+b7sjc(xx xm erating 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 cartacis*2 xz/p7:kk(u a starting from rest and uniformly accelerating across the floor. The timesa z (:kt7a2 x*/ciukp 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 accelerating ball. The position of xk,)7pwedxc6 5san: (x ;ibsj the ball each second is enw s6p a d7xc5ks; ,i(:xbjx)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 bals0kc to--z zze )g2sb6 6zpn5wl eacb2 ) z 0-wnszk 6sezogztp6-5ch second is indicated.
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 circus clown on a unicycle moving 8ht 3at +m-lafin a straight line is shown in the graph below.-m f+8th3taa l
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 73wequn (u8sebu3ry( unicycle moving in a straight line is shown in the graph below.3urb7u8uyw((3nqs ee
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 a vacuum..v:vw:u47 gypzyc it 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 d2zwn-m 0lo0 e0ndkc/ xescribes the motion of a marble on a table top for 10 seconds. For whichznn /o kxd0-m 0cwl0e2 time interval(s) did the marble have a negative 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 accompanying graph describes the motion of a marble on a table 1vhjl :0;l,it wsweh-top for 10 seconds. For which time 0es ,t-jil;wl:v w 1hhinterval(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 descrnr:zp o7oq(bp3q3h-0 wp0t vfibes the motion of a marble on a table top for 10 seconds. What is the marbles average acceler0rwof hpp-0nbqo33 t(:7p qvzation 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 *p34+f8(thfbthmmv n rest for 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 spe(;qldci,sqlti66 t4 ded 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 moti8me xo8f qp*.s3y m5ucon of an objecmoxfm *u 53yq. 8p8ecst moving 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((kv h,ey reh) motion of a toy car across the floor for 10 seconds. What is the acceleration of the toy car at t = 4 s?r(v) yh(h,e ek


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 mo/ohb cw 4ym5. 1j1hkjftion of a toy car across the floor for 10 seconds. What was the total displacement of the toy car for the entire 10 second interv5yhj1fbomc/4 w jh k.1al 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 motion of a toy ,v hyob4h:8hu gw) xm,car across the floor for 10 seconds. At what times or time intervals must the net force on the toy car be zero?o:bwx hmvhy ,4g)8,uh


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 to 60 km/hr in 4.50 s)x-d r/ce(s 8ijsruu ;. Which one of the following choices best represents the acceleration of the;iu8ej(x rs) rsd cu-/ 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 versus time curve shown. Which o/-dl ) s6gq 1siou1ldlf the following statements regarding its m1 uqdsli)og61l- l s/dotion 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 according to th., :)mpfbfv w amll:w-e velocity versus time curve shown to the right. When does tlpmwv . w), lf:bma:-fhe car have 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 tennis ball is moved so *7 wq .gcaeit2.e4jypthat 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 b e.tg4yie.pjc a*72qwall 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 5f(qsr k+ 54a8us l pch-ha.jnapart and traveling toward each other.(pj4sqnuh8s.kh l rfa 5-a+ c5
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 positiv sng(c-:g,lcz bs w(z( sw obzj21d01se and increasing,z1 (ljgszns(ds-1 wc2gozb0(: w sbc

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 velm 3dj *ny04a ;nwmdw-docity 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 choice2pbjfshsz33.p -6-bfbtm 2+sw+ nh tks identifies q2tpjptbs . zs-m6 3b+fs2kw h bh+-n3fuantities that must 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 mov2tsz0)0jo wkn 16 :1rbhseydp 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?

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-ti, ttfqbn9 ;rct .8t0d(l8ycucme, $y\;vs\;t$, 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 righuwjvf/ci wxmr *w8-8p b+qv/2(-hbb k t along a one-dimensional track for total time T in twv2 mc- vwjqx/b*kb(8 -/b pfww+r 8ihuo 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?

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 vs. time 01zjyl/ 0x1cmq c2slu tc/fw7graph for the motion of a car on a straight track is shown in the diagram. The thick line representsc21y0/ sz10 lqmul/cctxw7jf 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 motinsoek+, rf,f ew1)ai:on of a car on a straight track is shown in the diagram. The thick line represents the velocity. Assume that the car starts atioe1n:ef+ k sw)fa,,r 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 g ,rdpma;oojt1n: v 8n1iven by the position vs. time graph shown. For what time(s) is the speed of the object grea,d8n a moov11;:npjr ttest?


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 an66esc npl 73j;c5tich object given by the velocity vs. time graph shown. For which time(s) is the accelerath6tj 3i5s ecn6lc;p7cion 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 t mz.pga453v;zwbma+i8cx( gnhe area under the acceleration vs. time graph for a fixed time interval of an object’s motion, what quantity has been determined for that objex3nm8.pc4z a+;5gzgvb awmi (ct?

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 horizontal line with increasing speed.3vhs*y+u nu,x
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 partsq)dk.sk6/ ofh-aoo + fdkqlt2z ( ur1 d4olo7-:
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 and reaches thc).qpcjah45 se 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 w1nfl8en0gd ufsq;6.3d2xq jis 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?

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 ofpdd;tlss+1 y8,o)i of a particle moving along a horizontal axis is shown. What is the total distance traveled by the par,is l81fs; +oddtoy) pticle from t=0 to t=10s ?


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 choices cor( ad zf 8/zr64-e+dw99udctbx q6upgvrectly identifies all of the listed situations for which there is a non-zero acceleratg uqe dr/9zd6t +wxf9c(v-d ab4z6pu8ion?
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. ti1v 5(akqp,c p/hp5uajme graph for an object moving along a line is shown. The object starts from rest at time t k(a51q,phvjac 5/upp=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 its7,m -ai k2ifd ,hiirdg6q13 ox velocity along a line vs. time is graphed. Which one of the following choices best gives the proper interval(s) of time for which the oigd -f1aq dih6ki3,m,r7 ix 2object 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 horizontal track, each with consta xb,8eiz a/0s*wt.kannt acceleration. At an instant of time, the infoib t* x/kwa,n0es8a .zrmation 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 posit-qdsf1f-jpatztc :-3 ion $x$, 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 tii5y5 tphd;sfq 35b4 eime shown in the graph, which one of the following choices corre5stf ipi b;ey553d4qhctly 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 dgy+sie t bml6v3vnap+2,7ox5 escribes the instants of time, at which the car and tenv7 +tgv 3s2l, xo6pmi ba5+yruck 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 Qi0 7qmg1dmg q9, each start from rest at the origin and will move along the x-axis. The acceleration vs. time graph for each car is shown. Which one of the following choices correctly7dq1ggi m9qm0 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 gra+e6pef2- iw:y8r u*zl e+u :cdoxax*zph of an object moving on a horizontal line is shown. At what time(s) is the object movi+zufo- *2duxeza*iely::8 xr+e6c pw ng with its greatest 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 they 2sped x0k2*q x-axis following the position vs. time graph proviy*p22dx e0kq sded. During what time interval(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, 2024-10-5 02:24 , Processed in 0.487266 second(s), 165 queries , Redis On.