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 circular path of rxqv6f 5:1qpk)rslg1,0ogvu wadius $R$, 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 reference to a part-.:ug 5hniwfpicular direct:u 5-f giph.nwion 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 fod) r:;b)toqx+nk: hq uv3(p circular track at an average speed of 50 m/s and then completes a second lap at anv utn:opb )x)( qk;:h+rofdq3 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 0.80h4yayp:5gk w-b 9l3d f4c7 irs3xs z4k m in 1.0 s at the constant velocity. If it continues, how 4bdzagy3p5s9:lkf3kcyh- wirx 4s 47far 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 stationary on a 30-kg ta3kb9z33teg d /ayx.plank that is sliding at 5.00 m/s to the right across a frictionless pond. The boy then turns and startdyk3tb3g e3 /. zaax9ts walking on the plank at a rate of 4.00 m/s to the left, 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 kr9*ho hv1 mj+ 2:knvdvm at 100 km/h. What is the average speed of h: +mvnvhokr1jv2 d*9 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 along7oi,dr5ku rm5 the x-axis. The graph shown 5ird5 oru7k,mbelow 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?


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 c0/v5zgun7 u8 qzbq 4d.cp y3za toy car traveling along the x-axis. The graph shown below is a plot of the car’s velocity in the x di/zg7 .u ybpcq5v3cn 0zdzuq84rection, $v_x$ 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 refevihcxuj)3 8l 7rs to the motion of a toy car traveling along the x-axis. Thciv3l x uhj)87e graph shown below is a plot 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?


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 veuw2z*krp xqvo-r) g00locity vs. time of a duck flying due south for the vo-)qp wk0 z2*0rx gruwinter. At what point did the duck stop 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 refcwepuuw b8fk1a8os-b *9 9nz,er to the diagram below which shows the position and elapsed time of a car starting from rest and uniformly acce fukaup9bbno 9e8-c1w,z* ws8lerating 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 kq 6))qdh onqbq6h/zu qqe+** which shows the position and elapsed time of n**u 6q)ho )z6q/q kqdqe+bq ha car starting from rest and uniformly accelerating 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 qx-gqd8:*d9/ 2nc+ips rc ullf a5w0n for an object with the position time graph sho+nc:na2i9 c8lwrq0/*dsufp dq-x5l gwn in 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 qumcmvzphh *:(t);o fg -j zq -ensr 267m/y1kmkestion 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 original h)-(yet-j2;sm/n : m6mzhkmhzqgrp*k1o c vf7eight.
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 ini6qtw9 hk5 /fr 7mpg4lformation. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor and rebounds to q /wt654i kgl pf9h7mrits 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 (:6ry8uix g*rpb4i..q *e 5dncl hzb n44drltwith a 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 scenario: At ( zy25d0jgk:m4 ohms b)wa h2u$t_0$, 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 re6o;b(hgb it+ qfers 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.
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 t7 7/ohek1gwn;, k ncnmrau 1x7o 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?


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 r*:glazccel .f+yz y:;;x 7zqt efers 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.
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 dv5)1lts gde08z fyf.eown a ramp, across a horizontal table top and off the table edge. Which of the following woulst 1) dle.zve8 f5yfg0d 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 relavka(edfo()o,djl ; 5g tionship between distance and time for an object that is moving along a straight line. What is the instantaneous speed of the objeca;deo ,jfgvld5 o(k) (t 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 relati m8j2:7n( x jdatr :yf53ademionship between distance and time for an object that is moving along a straight line. Between what times did the object have a non-zero anrjim( ::f7tda 3dm25y8aj excceleration?


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 t dw 3ay:gy-*gihrown straight downward on Earth with an initial speed of 12.0 m/s from a position 10.0 m above thig:w3yd -ay *ge ground. Ignoring air resistance, the speed of the object 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 bexx6m4u fewt;3 low represents a toy car starting from rest and uniformly accelermxw 3x4utf 6;eating across the floor. The time and distance traveled from the start are shown in the diagram.
What was the average speed of the cart between 0.1 seconds and 0.3 seconds?


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 r+f8;orc-3gmv t s5 cttepresents a toy car starting from rest and uniformly acc ts8;o5crt vfg3+mc- telerating 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 toyml;a0is*3 ky d car starting from rest and uniformly accelerating across the floor. The time and distance traveled from the start ksi*3; ad myl0are 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 the bally;+e3i; bpma .f5svyx each s;m .svfy5a+ ibpe;xy3 econd 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 cdwm lw ,8umdxr,s t 20vc8jo50,vhm8ball each secr00s o md d8vc 8j,tw,m8xw,2v5lu hcmond 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 cirz d)5;e1r6esizo qig8 7 aktc0cus clown on a unicycle moving in a straight line is shown in si1kazc578 t0e;dg)oqeirz 6 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 circ nb lnpk,;2xa:l9w(j tus clown on a unicycle moving in a straight line is shown nx akblt :9,2n;plwj( in the graph below.
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 near the surface of the e 5s5o3d3mwfg8 l,ov esarth

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 accompanyingtw*vc :u.nyc0 r ,i7au graph describes the motion of a marble on a table top for 10 seconds,acy ri 7*vuct0nwu:. . For which 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 tablce px6ly(.6uk) rqo ,n 9xfai*e top for 10 seconds. For which time interval(s) did the marblpc 96,xay l.fo6iqxnkur e)(* e 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 da e7w77+8vof,zy opqwescribes the motion of a marble on a table top for 10 seconds. What is the marbles averafqo8zw+yowa ,7ep7v 7ge acceleration 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 fro*g (iz lh;lu /i jk5+ljx22snkm 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 pe6 kwdh)h+) mygr;/rgv+lk 6g6ozv (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 cus-gx;9*9w xl; lmfhr orrectly represent the motion of an object moving with a constant speed in a straightl-9r; guw*msfl x9; xh 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 demi (q14gobmg;30kklc scribes the motion of a toy car across the floor for 10 seconds. What is the accelera3g(lcm01gq;kkob 4 im tion of 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 motm cieaj6wg--:pdt-tro-e )) l ion of a toy car across the floor for 10 secon- gmtod p)wt-6ilac--j)r:e eds. 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 motion of a toy car across the fl9bgwlv o-b73b oor for 10 seconds. At what times or time intervals musv-lbw b9gb3o7 t 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 to 60 km/hr in 4.50 s. Which7v z5+vaa2n 2s e:cd-zkng .nq one of the following choices best represents the acceleration of the cazvke7 n5 2a:n - dv2nqcaz+.sgr?

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. c 8mditg,hs65 Which of the following statements regarding its motion is NOT dis8h c6g,5mt 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 move uaonzkx*-g t7bzjk1.j1k(-a (qw+ehtsh ;d:s along the x-axis according to the velocity versus time curve shown to the right. Whsgw kd qj-(tja x+ (t k7hk:zze nau1-ob1.;*hen does the 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 movec,qlbd1 wl5 vj84w: 2vniz .abd so that the angle between the velocity and the acceleralvcww :lz8b2v4 , ijqb.n1da5tion of the ball is kept at a constant 120 degree. Which statement is true about 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 apart ann 3pyvg7ac, 1nd traveling toward each other.a,nn73yc1 g pv
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. Wjog -.z1uwn 2;s wuv)rhxdm0+hen the acceleration is positive and incr uwx.o vr mz;-)+2swj0h un1gdeasing

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 a n,a1ev)kh6x9 gsb ;rsverage velocity 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 dimension l*xqvn+tnxxm+lg, - y8kfj1km+: :o xs, which one of the following choices iden 8 ljtvy*xk+n+gnf:mlkx oq1-,xx+m:tifies quantities 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 movu2m x v9oq:/7r .elk)pyoy vk9es $3.0\;m$ 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,3zegdwuwg3 0bp:l )i m+i*vv-5sotn 1 $y\;vs\;t$, 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 the5)d6npw +de iw right along a one-dimensional track for total time T ip)ew5ndd6+i w n 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?

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 graph for the motion of a cav0,cy l/ik yejcz6+,a r on a straight track is shown in the diagram. The thick line represents the velocity. Assume that the car starts at origil,i 6zj+vce ,cyyk0/an $x=0$. 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 m.ripom9b+5jpj4m;bq kx22s 7qn) yxgraph for the motion of a car on a straight track is shown in the diagram. The thick line represents the velocqp75 poxbkmm9 b+2 .q4jn jr2y;mi)sxity. 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 grar(w7i;y bktt /ph shown. For what time(s) is the speed of the objecttwrt k b7/;i(y 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 objec,rcd /j; 6)oo)crebbuuh+r ,x t given by the velocity vs. time graph shown. For w+/b ,hrb 6 , ro)e)cxojcuur;dhich time(s) 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 acceleri,0mj ,uc t0nbation vs. time graph for a fixed time inn jt,0mbic, u0terval of an object’s motion, what quantity has 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 horizontal line with increasinazj2 -wqfjtb+6q6 r/ mg 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 trqdyo x5ti4xn0 rq8 -vl7 /jgs4ip 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?

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 relea/;7u ghftp cxc l7f9vkhyb ,o5y);fv )sed from rest and 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 and reaches the ground in a time o diexn,z+m)g31zt/d)8sb ykz f $2.50\;s$. 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 mls.kb)wt8-cmq xrt+9 ,6biugraph of a particle moving along a horizontal axis is shown. What is the tcbkml)+ it6m9wqsr b tux,.8-otal distance traveled by the particle 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 follo) we/3pw zzajc/zqj:2wing choices correctly identifies all of the listed situations for which th/aww/3)z p:zeqjz c 2jere 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.

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 graph for an object mp hugn.peb(nd d j3thn(+;+2 eoving along a line is shown. The object starts from rest at time t=0 s. At what time(s) does the object attain a n3+bght( edn 2ehp;.ju+d( pnmaximum 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 )bk4i e8 5kcp/ z0. jh)ukjvwfits velocity along a line vs. time is graphed. Which one of the following choices best gives the prope8jev0/bhpzuw k k) )fk4 ic5j.r 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 horizontal track, eaa -f4bxkmj44yod zi-45hd uu7ch with constant acceleration. At an instant of time, the informatio7- i4u4yj4hm-ofdz xdau5b4 kn 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 positio r9;qwx:ka2 i4c0ajkr i (or9rn $x$, 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 time shown in the graph, which one of the followink7ztpqdmb0 im;9 (k:mg choices correctly describes the relationship between the average speed of m (9 0kimkqp:;z7tmd bthe 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 +cxltnv3 rj:i.8cqh0 describes the instants of time, at which th.+xh:0nvc i8lcj q 3rte car 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, each start from rest a(i.x4hgjyb,fps; p, vh*cph+n b k)5ht 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 correctly id5(*,;ph)hh c kpn+b yvjpb, fhgxs4 .ientifies 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, j. /wqtuo,a1ejk uc,xkp5d/ an object moving on a horizontal line is shown. At what time(s) is t /c, 1k5oudpqj,/aj.wuxte ,khe object moving 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 the x-axis following the position vs. time graph provdzbpe:w.yr. t wedd .k6r.i/ ;ided. During what time interval(s) does the mass have zero acceleratp/ kwdee6b; r.tidz .y..:wdrion?


参考答案:    

  • :
  • 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, 2025-7-2 09:21 , Processed in 0.599526 second(s), 166 queries , Redis On.