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 aroj,sy-rp h(gu 9und 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 reference6jc+xm( ss zh/ to a particular direcxjs+( 6sh /mcztion 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 complehaj i8+jt q+ ,*pq9su ,qwpc( gzby5way. t9-etes one lap around a circular track at an average speed of 50 m/s and then completes a second lap at ani,q uzc++8a yh, 9p(95q*jbpgtsy taw.wqe-j 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 t2i:6b6hyyh +iu 1 wkdthe constant velocity. If it continues, how far26h+tykdy hi1b i:uw 6 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 tohmdif d3kw;q/2 ;r+a9dg,w plank that is sliding at 5.00 m/s to the right across a frictionless pond. The boy then turns and ;o,dmg;tw /w9q+dd3k2i h f rastarts 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 :j as+jz8f xqenv+e4:400 km at 100 km/h. What is the a s:qa8jeex+: zvjnf+4verage 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 to the motiono :y1 +l5evocg of a toy car traveling along the x-axis. Thvyl:o c5+go1e e 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 mot,gw)do3yi2z rq a :ri6ion of a toy car traveling along the x-axis. The graph sry)2,o wqird6a z:3gihown 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 mo.5g k,pt( ut;6 hikeuwtion of a toy car traveling along the x-axis. The graph shown below is a plotgwet.;(ku ,p 5 tih6ku 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 t(;i-qx ev6,+ew-n d zu :zuk ,dnijrf+he velocity vs. time of a duck flying due south for the winter. At what point did th(k w,+euin uznde+i ,r6dq-: xjz-;fve 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 refer to the diagram below which shows the poste(zy24 yeyn2 45ho/k9jvy j jition and elapsed time of a car starting from rest and uniformly acceleratin52j4y(jeznh eoytyv 42y j9 /kg 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 diagraa5o 1u f5y2ualm below which shows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. The aveoau51f5y a2ulrage 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 object witw xibre-u29:cq/ 7 qszh the position time graph shown in the diag-x rz9ciu bes/qqw 72:ram 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 theihj7bw s*gl-tisy/)* following information. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor and rebounds to its original height. ) -7shbjl/ i*w *tgysi
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 thipj )tf )nqe)/e following information. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor and rebounds to its origina) tjf/)ie)q pnl 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 with9k+yl1 er7m7jo 3izxg 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 followinlv 4 t h cg8xfxk6hiwvz:.(t.9g 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 sc; u:j1r2 qnpfrenario: 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 thel*ll*3 l o8 e crdx88bh0glkroxk96/j 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 resl (nn 6 pn8pj61;iyc6c*u irxfers 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 down a ramunvym 6 +6 tquoasz20;p, across a horizontal table top and off the table edge. Which of the following would best represent a graph of the magnitude of the ball's acceleration vs ;uas qo0muny 2z66t+vtime?


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 reprevop+)c)nw 8lz 6( 21)g0 dxjktwllgcs sents the relationship between distance and time for an object that j8lvzlp2ck 6g )1o)x wts+dg(0cwln) is moving 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 relationship between distance and time for an obisdjx9ozdk9 54h ;kw6ject that is moving along a straight line. Between what times did the object have a non-zero acc9z whd;6di4oksk j95 xeleration?


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 sx /kw4fr 2q*vptraight downward on Earth with an initial speed of 12.0 m/s from a positix/q k*frvp24w on 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 belo.ftx kfoqfgj;50. 1 mow represents a toy car starting from rest and uniformly accelerating across the floor. The time and digof.fk;m0xfjt .q o51stance 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 starting from rest anc5v 9lul wjfp+t/nu+5d uniformly accelerating across the floor. The time and distance traveled from the start are shown in the diagram. t +l +w/jcvp9u 5nulf5
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 belosi 9xnw5lf+ 8jw represents a toy car starting from rest and uniformly accelerating across the floor. The time and distance traveled from the start arsw5x8 +ljnf9 ie 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 unifo4mtj 5 4ezu//qhn 4uycrmly accelerating ball. The position of the ball each second5u44 yhet/q/4uj nczm 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 pk0gte zp-ev-2 3a 3ly:ej6j actc.8moosition of the ball each second33:-em.0 ogvy zejt-628ljk cepctaa 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 pp+r/ 5cy4 ,jtmza)zn a circus clown on a unicycle moving in a straight line is shown in thp,z t ay+/jz45cp mn)re 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 moving in rp:j6 ne:6bbasf-o 7s a straight line is sh6sar 7:j6-:bo pefbs nown 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 v hyy7gu9vtfe g8;*; k6+ucc;2y h tydbacuum 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 motion of a mawd/8iv4h4y3r6f4amx ,ir qz frble on a table top foqrym6 i 84vwfi4rh/z3x fd4a, r 10 seconds. 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 xntss5h* m.8wvv9fn+cd4o bi o) ,hg7 the motion of a marble on a table top for 10 seconds. For which time interval(s) did th ,t +x48g b s)vhosn97n5hmic*w.vodf e 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 motio zckv ::3tb)lqy7bt(grmo.*n n of a marble on a table top for 10 seconds. What is the marbles averagy*mt 7 vk gnro::b.z t)3lcb(qe 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 .bqdi*brz6( 1p lj:ipa 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 downf eg23ydx4p9 zward 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.

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 corre.7(,i-y 2rpuxp(663c o wueqqb owen zctly represent the motion of an object moving with a constan 6( 7wcop. qeu-roqn iew2xpuby3z, 6(t 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 across the *;/yevejavt3floor for 10 seconds. What is thetejva y;/ *e3v 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 a toy car across the fl, r+gkr6+nbc eoor for 10 seconds. What was the total displacement of the toy car for the en6ebcg rrn,k ++tire 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 tk7j33 ws hdp h*5fhzyx053bbk he floor for 10 seconds. At what times or time intervals must the net for hdsf ky03w b3bh5*kz7jpx5h3ce 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 u+lnme mu3+v -hj7 roo4niformly from 0 km/hr to 60 km/hr in 4.50 s. Which one of the following choices best represents the acceleration of th-m37 o +mh4enurovjl+e 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 b3 4xk,jw :cqm1(e-ixt r64i nawuzo4velocity versus time curve shown. Which of the following statements regardew 4nkait:6 x ,rqwuz4x1b (4j oic3m-ing 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 according to the velocity versuiw.5-3jrbs,h+:i/e sa zpmg hs time curve shown to the right. When does zsjb+.gha:wii, h m 5rp-3/esthe 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 inte3nq;uj +9zxn 8r;eqqyrval of time, a tennis ball is moved so that the angle between the velocity and the acceleration of the ball is kept at a constant 120 degree. Which j n+nq x9qe3 ;;ry8zqustatement 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 +9,utcwzfn:9 wk +cvoand traveling toward each other.vc+ noz+f :w9cw9 u,tk
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 lsy x48 6ryy.nm d0rqq/ys9(athe x-axis. When the acceleration is positive and increa8a dny 6qryx4yrlysm/9s.0 (qsing

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 v8z i4o 0bp a 7 mr0kmxm;py7v8p6zryr6elocity 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, w +vqg 4 mo;b.zun x*0/atoom-jhich one of the following choices identifies quantities th; +omt4 .n/jmvguxa0-oo*b zqat 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 movefjx ,rigo*(oyya; 4n ,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?

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, kiuqvnjb ,yd je045m0v *,z *h$y\;vs\;t$, 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 t f3bzb* b j/kr8db;kd9y geof0+vr,9po the right along a one-dimensional track for total time T in tf3*z+o9kbfdb rdpb/9k8,v br;0 g yj ewo 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 motf0uls*ky bjw3am*4 )6ifjxwp6 h3(brion of a car on a straight track is shown in the diagram. Tm(64 * h 3j6 *iwjfy b0ls3)apwxbfurkhe thick 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 straight track 2qy4c9;rwhzn s-v hs1b 7lg ;pis shown in the diagram. The thick line represents the velocity. Assume that thcr s;94qshg-bz n7hy2l1vpw;e 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 gize t, x8 qk5y65u*ik2lr q5pxdven by the position vs. time graph shown. Forp 5x x uq5q2*di5l ek6yk8tzr, what 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 velocj1.t 8aj3nx78yu3c dei-xrkrjqq 24y ity vs. time graph shown. For which cdj7ni 42ra83kyuxt.xyj qe-13 r qj8time(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 undjtwyiw; k j0rzd6 d;/w oe5wkwd*w6l6 tu 178ver the acceleration vs. time graph for a fixed time interval of an object’s motion,*;zukw ww;t8t jey6/j66d7 vdrwdw ik1ow5l0 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 increasing speed.8pehk yds)n: i,ida)2h v u(m-yq; vb2
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 b/h(h5 (tjykv3 yl1d(,pzw ukin 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 released from rest 4a m7 ys954 1 *i3sc8beso;6rqu6rdnvocptj t 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 z9 6ys;u 8ejivzq */w)l)krvj 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-z*d r6zo/wna particle moving along a horizontal axis is -* zdwn orza/6shown. What is 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 cbh;s;4bb lk2aha ( j*shoices correctly identifies all of the listed situations for which there is a non-zero acceler ;bh24sjl ha*;abb( skation?
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 moving along a line is6mlbr4 gh(e. u shown. The object starts from rest at time t=0 s. At what time(s) does the object attain a maximum displacehb6r (e4.g ulmment 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 veloc5hjg(5 o:w srfity along a line vs. time is graphed. Which one of the following choices best gives the proper interval(s) of time for woh( 5rjgf:5 wshich 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 with constfczt(ui-m a4,ant acceleration. At an instant of time, the information abou,f -ut (zma4ict 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 positio7ynouedn .ls3 5ac* f(n $x$, 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 inpuqijngeweo7+, 6mb.g *.nm + the graph, which one of the following choices correctly describes tobeiwmugg7 *+n npq.j e.,+m6 he 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 th at)uf or,z,79zq/ofke following choices best describes the instants of time, at which the car and truck travel with the same spro 7 oz,z,uqa9f/)f kteed?

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 origin and will move alo9u td0fye xkb3o k4u;w;7/vd3rp9 lz ll-x/h nng the x-axis. The acceleration vs. time graph for each car is shown. Which one of the following choices correctly identx4uxd;t93; e-nhb l/3 /vo kd yl7uwrkp9fl0zifies 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 gr : 9tvp.9ghoe0mko*y caph of an object moving on a horizontal line is shown. At what time(k9otoe* m.yhp:c9 0gvs) is the 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. th88ki;gc 51 hi)i 2+mufql2;d oclvfbime graph provided. During what time interval flhd; f2bimvoqc82h5)uil+ 8;ck i1g(s) does the mass have zero acceleration?


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|手机版首页|使用帮助|题库网 (https://tiku.one)

    GMT+8, 2025-7-13 16:32 , Processed in 0.468100 second(s), 165 queries , Redis On.