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 circula n mby:k3gza/wyj46(ir 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 referencuo6,hsq 7tjklng84 i9e to a particular direct6n h ,4gkl78ijut q9osion 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 circu- d ;tes2bb/+wirzbz+lar track at an average speed of 50 m/s and then completes a se rbb i2tzez ds/-+bw;+cond 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 0d a apr7.mwt:3.80 m in 1.0 s at the constant velocity. If it continues, how far will it trav.ra7apwt m3:d el 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 sptui 1g0*vp.6 u.hfiiaug (s5 tationary 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 tip5u (phg.01u .agi6fu v*i son 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 km at 100 km/h. What*lsawo f56 v m/p-elh0 is the ave pslw lv*/m-0h6aoef 5rage speed of 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 p4jh+ke d dbs:;aztp.hlg5d/..z 7 oe to the motion of a toy car traveling along the x-axis. d.j t4k za/geh.z; 7lsh5 +pdobpde. :The 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?


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 car traveling along8l e,3fip0g.nkms 7t,f kn;nf the x-axis. The graf3m;enk07 ,psgl8f n kf. ,nitph shown 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 t :vx -oo;kqkfk6b*lv*oy car traveling along the x-axis. The graph shown below is a plot of the car’s velocity in the x d*okqfo;: kl-x 6bkv*v irection, $v_x$ 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 of a duck flying due sounbyra8 fx v43;th for the winter. At what point did the duck stop itsyrn4vbax ;3f 8 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 shows the position and xd k6-i90m jvcelapsed time oi-j dcv9x 0m6kf a car 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 o( gjg*5a p+ukb5ae g7diagram below which shows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. The average j ke o7pgu(5baga*+g5acceleration 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 ti(p2ct t3 7a/xs jpm5hzme graph for an object with the position time gra 5psh7m t/aptcxjz 23(ph shown 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 jvhz6hv/ yx usf(qa5z1r t/**question 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 heigh*/tyv 65q 1jazsvruz(h xfh/* t.
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.cr0vzn0 d2vy following information. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor and rebounds to its originac.dv0r0 yz vn2l 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 ugxo84p 0- ( zed *epezp(*jgzwith 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 fol(v:4rg ) 1)hhrpeckd 9 3agkk(meh4kdlowing 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 ghz c4*2sbs.kq ax9z2lam 2y w363mzzto 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 to the followi0-a1y f6 yv7vyl1vru kng 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 following scena + 2ig*p.qrz:izkvej, rio: 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 top and zh vd4,x(6.mo ;kq4 j/xxovdl off the table edge. Which of the following would best represent a graph of the magnlk46xdjvz,h/ q 4dox .x;vm(oitude 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 relationshiaplte y,w260bsut4 7 ep between distance and time for an object that is moving along a straight line. What is th,e0 eu sb4yt w2ta6lp7e 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 relationship between distance and tm px ma94w*ea50e )uinime for an obanxp u m5ei4 e)09awm*ject that is moving along a straight 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 straig0hsw8kaf;idw1*s4utk 0s tf 3ht downward on Earth with an initial speed of 12. h8wtwf1t40s dk3ku0i*afs;s0 m/s from a position 10.0 m above the 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 below represents a toy car starting from rest and u 0w27;xrvrf, kq-blr6jncee 7 niformly accelerating across the floor. The time and distance traveled from the start are shown in the diagram. ,wn-jex;ck re2 qr rv7b f076l
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 wu)u ah7xjefaht)0 b c2/ e8+dstarting from rest and uniformly accelerating across the flou)xejdw2f/7 aut he0c8) hba+or. 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 czo3odktq99 k 7k lqw34 ime77har starting from rest and uniformly aco7i7 k397eol 9zqqmk4dwkt h3celerating across the floor. The time and distance traveled from the start are shown in the diagram.
What was the instantaneous velocity of the cart at 96 centimeters from the start?


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 accel+)2o w61zrjz6zz 4 ,71jked2zhpu c zp *fhnsjerating ball. The position of the ball each second is ind 6zczrzpjzpn7+61whf dzkj) *eujhzos14 22 ,icated.
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 uniformllj 2,jw1nbc a1n/:kkh y accelerating ball. The position of the ball each sk kah/lwj1 nbn1j:c, 2econd 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 in m03oy4+axk ms wikc98 a straight line is shown in the graph3 +i04yxmkw a9k os8mc 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 unicyyw i+u22okhz( y8oen,cle moving in a straight line is shown in the graowu8n oiye +2h2y(,kzph 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 fahacs )wi6p0fj)tt z9 *lls freely in a 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 accompanyinsfd jsviz71dnkc0+7 o fz6 xyn7d,b-5 g graph describes the motion of a marble on a table top for 10 seconds. For which time interval(s) did the marble have 50 is1 jd7dn oc 7,b+ff67ksy vndzz-xa 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 -fbn / ne vfx2.-rrrv8gjzc1y /;j 5isof a marble on a table top for 10 secondsb xfzerr82j -njn/.1c5f irsvv g/ -;y. For which time 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 marble 6,wuf+k l7. v n cqq/0*iyxoljon a table top for 10 seconds. What is the marbles ,u n .l/*+ic lfy0xwqj6ko7v qaverage 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 from rest for a ti 5tpezujb3+1 p24ywbs mw l-e1me 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 sp ypk4:zq mb :zdogqav813m )e*eed 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 motion b p/;nf3m0knfl(x0)fj,uex / shb h k5of an object moving with a constant speed in mp0) fn /h/5eb;( fkx0sjlkufn,hx3b 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 desnn o0s )qh+8uucribes the motion of a toy car across the floor for 10 second0)qs n +n8uuohs. What is the acceleration 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 motion of amkv4sly :h 4l.d t-ksc41x.cn toy car across the floor for 10 seconds. What was the total displacement of the toy car for the entlk 44ls.-cmhcnkdt .yv4 s :1xire 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 oigerjzk 6grz u 02 t75d*2fc4pkd4hs8f a toy car across the floor for 10 seconds. At what timu202cj6zse 4dz7trdhfp5gr * 4 k8kiges 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 to 60 km/hr in 4.50 s. W(i q6qf 0:bkis u.,k5sax v4rnhich one o iq.knk6si,us5b afr(:4x qv0f the following choices best represents the acceleration 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 versus time curve shown. Which of the followkj:atm 4b.9 5aw zlkh.uwf7)ging statements regarding b5mh7: f.) .9 w4g ktaawjulzkits 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 according to theks9)hc9gpe4 fdt 4pu. velocity versus time cu4hec . f tsgk9dp9u4p)rve shown to the right. When 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 moved so that the angl vvbts/:e(l8r e between the veloc:(e lbtv8svr/ ity and the acceleration 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 and traveling towa6u ra5zpm9b t+rd each other.m tp6ba r+59zu
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 accedslb.+;7b oas v mcn3+leration is positive and increasing3bo v;a s sld7n+mcb+.

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 velocix *vhv* qngplt:5ee)4ty 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 kj1 7p2kpvg 0uidentifies quantities that must hpj gk712pvuk0 ave 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 moves vq9a+i9jmy kv9 99yei$3.0\;m$ 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, g0)orrv 4m )ai$y\;vs\;t$, 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 one-dimensional track for total tim7g uwt)lqw a)0e T in two parts.a)w0tlu7 qw )g
• 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 ca8d* *dw gpwm76wa9xof a car on a straight track is shown in the diagram. The thick line represents the velocity. mawad7*6 cwdg8 wp*x 9Assume 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 can e u-q71(ipi/* nybasr on a straight track is shown in the diagram. The thick line represents the velocity. Assume that the car starts at ori1b y-7(e qas*u i/nnpigin $x=0$. 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 graphpv z+yl fk9cgte zjr1 j*w+492 shown. For what time(s) is the speed of the obtpw +k2gl94z9cje1jy v fz *+rject 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 o:n6g2 exp 3fvd(hdv6 motion of an object given by the velocity vs. time graph shown. For which time(s) is the acceleration of the object edp6vghev( 6:o2 d 3fnxqual 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 acceleration v)sryc 6fz2gj u-s6h *b qm4yy.s. time graph for a fixed time interval of an object’s motion, what quantity has been determined for thaj )gzc*h6.-r2s6 yqby4sfmu yt 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 horizonb+o 5 di1 9f9xnjt pac1;*xltatal 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 par-+1cy:fkcv .eiu4:xugi fi8rq t:.z lts:
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 the ground in a t 5,jon6r x/lo2fdege-ime 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 ti c*qt8*x1 ihee5. neap:o zr*hme 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 parpd fr5b, nj(dzy93*suticle moving along a horizontal axis is shown. What i,f ydsn(ur jp 5db93*zs the total 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 following choices corrkk5fr ;gmv4q+ectly identifies all of the listed situations f+vqkk;4m g5r for which there is a non-zero acceleration?
Situation I : A point object moves in a straight line with increasing speed.
Situation II : A point object moves in a circular path with constant speed.
Situation III: A point objects moves in a circular path with decreasing speed.

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 mo lfkfc(c:cms-m ao4o3n+s0 7 mc.rgp /ving along a line is shown. The object starts from crg3 (7c .p aknc0s+/4mo-sf: mlmfco 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 lc4yyim(ma):az.(vf jine vs. time is graphed. Which one of the following choices best z) aym y(.vi(:4mj acfgives 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 horizontal track, each iv zia87y72kjspf y0,with constant acceleration. At an instant of time, the informatf7s, 8aj2ivy7ip0 z ykion 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 ha j6t;y3a ax/fms a position $x$, 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 wm :;hy n4lygne 7qhw7.*tn 1a ;37lqwur8medone of the following choices correctly describes the relationship betwedarht 4m3u.;y7ny we:ww8mlh* 77le ngq1qn;en 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 de e5r5kpgnnawi2 yb*:5w 3chmk5( q7fhscribes the instants of time, at which the car and : 5 3k5 h*ib7cqn (y2ah5gwenrkmfwp5truck 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 at the origi rcrd(e7uxm *6an+*jnn and will move along the x-axis. The acceleration vs. time graph for each ca+m a*6djru7rex*n( nc r 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 on a hopy2tp yhd0wa9 2p,8yyrizontal line is shown. At what time(s) is the object moving 2a 8, yy0yth pppy2dw9with 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 .65n0e u psbcak:2xpvposition vs. time graph provided. During what time interval(s) does the mass have zero acceler 62uk pbp0s.ec:nv5 axation?


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, 2024-7-5 23:13 , Processed in 0.523381 second(s), 165 queries , Redis On.