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: 游客未登录  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 tn*szi6. . yfuspeed 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 reference to a pa7ovjl) 3y0p .gggw2lf rticular dire2g ly3v0g )og.f7l pjwction 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 avsvz,)epy 7afg f* k5cr)j)o -berage speed of 50 m/s and then fgz pjv*, srfb5e))k 7 yc)-aocompletes 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 velocity.qs)s5n p)/tu 0h7u 2iezjufnlf7 v :2u If it continues, how far will it travel in 3.0 s5 fqjp7i:v/l nfzu2uh tu)sn)s2eu07?

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 0; z)ne prf/ ptb37ejp30-kg plank that is sliding at 5.00 m/s to the right across a frictionless pond. The boy thepn/ re;pz ebt0p 7)fj3n turns and starts 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 r5yfl/vg .zz.km/h and 400 km at 100 km/h. What is the average speed of the motorist z.rz5. lgyf/v 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 the xp:n. y4 wds 6blw, mdb0(e,to1txt yc2-axis. The graph shown below is a plot of the car’s velociotpet:,cl 2d.y,byt4dx nsw 06(b 1m wty 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 refers6xne;0s53er ; xv)x fk*wdxcq to the motion of a toy car traveling along the x-axis. The graph shown below is a plot of tr60exqxnw*3 s v;x;c 5d kexf)he 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 trax 6iq+6 oaum*6i/ c3am txk6okveling along the x-axis. The graph shown below is a plot of the car’s velocity in the x directio6ctam63x/i*6iu+ k xo oa6mkq n, $v_x$ 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 /l :qspt9z2 seof a duck flying due south for the winter. At what point did the duck stop its forward mops zq2 set9:l/tion?





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 th139bjx 2tdylo2wcu t4.o tyd 8e diagram below which shows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. What was the average velocity of the car during the third sec xoloj412bttc 9uy28y. 3 dtwdond?


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 belo0a ao3kp+(+zf 9rgvua l f84oa *fa(nxw which shows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. The average accelerat0ofl 4u(xnva(ro a3az+8ffa agp +9k*ion 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 :e 0c-*m8a)ywrkfx3lrv a ro.of the velocity time graph for an object with the positior)0 -e. 3 lc orr8v*fk:xymawan time graph 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 question refer to the following information. An ideal ela:bc f**( +cp mfz x74;wruswicstic rubber ball is dropped from a height of about 2 meters, cfx*u* cz( rf+ p47wc b;wsm:ihits the floor and rebounds 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 information.h:av.hy3gjph2ye 77s*ts7ws bw tc 4 ; An ideal elastic rubber ball is drotwy.*7:wth7s3c 4vasjh be2 ys7 h;p gpped from a height of 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 o/eal ke d-yb z:e-t,7r0pl*f with 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: j67t; t eu18+ex9m6vy mmq/k ,kog1ag4wube eAt $t_0$, 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 scenarioei tlzn.n(x1j16 hv8 qgr 9l+j: 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 foln udh*8jkevipzliw*6+ hu:; 0lowing 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 fol plc:ca-ymo0htd (*sprg; *3 wm4uqg4lowing 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 doap3)+bz ,e /2zn yto5yv,vfp cwn a ramp, across a horizontal table top and off the table edge. Which o/pv,yezzacp3vtn + , y2f5b)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 distance and time for1rf3ua g9f7kx an object th 79fkg1 faur3xat 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 be6a 00o-y(9so qc+ls+qgb qqwmtween distance and time for an object that i( w + qaloq9g0 yscb-moq+s60qs 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 straight downward on Earth with an init2gic gev 4xqk6 w0nc3;ial speed of 12.0 m/s from a position 10.0 m above the ground. Igno4eqn3 wvig0ck;cg6 x2ring 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 z m2l4x(n7 ytv2j4oga 9 g3urua toy car starting from rest and uniformly accelerating across the floor. The time and distance travele3g 7 j4a2 g4mnrtz(l9y2vuo xud 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 fr:nsa4swpjvd:f(j 8;b br*rm- om rest and uniformly accelerating across the floor. The time and distance traveled from the start are shown in the diagram. vrs(df*s ;wpnm: 8 j4b-:jrba
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 reprn-5k+riho b48 vjl ws8esents a toy car starting from rest and uniformly ak8l5h4js nrwv 8+b-i occelerating 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 accelerating ball. The position of the ball,a,iapx(h z)3vg +q3 cglfjl/ eac 3lgqli+va jzfc,a 3h()pg/x,h 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 zzn02x1qv n .ea uniformly accelerating ball. The position of the ball each second is indicatnx.e10n2zv zq ed.
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 mo: ,b+yjaj w)hsf-x.olving in a straight line is sha so+- ljfh,x. wb)y:jown 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 movi0w m yi 1bkv8ib6+ix k5q)uyvqb9o*r)ng in a straight line is shown in the graph below. mvwq8)i6xbi y9+ b5yvb1o0q u*kr ik)
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 earthuzq: p5pbh;;e

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 marble on a table lx iayqg0pw ; 0gav/r c,1r1m.top for 10 seconds. For which time interval(s) did the marble c0x1 gr.wqla0 / m ra,ig;1yvphave 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 dnrwx 9y.cz;lm/ma3 +x escribes the motion of a marble on a table top for 10 seconds. For which time interval(s) did the39m/+ w ncrxy lxz;am. 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 nma(6( z u.6j kde a;o2sm)kcqa marble on a table top for 10 seconds. What is the marbles average accelera2d6 ksaq( .m om (n)jzeack6u;tion 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+m6wyj -(mppu0ax-ua uniformly from 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 speed of 3:6a*oa/dtjyck 0mbm $20.0\;m/s$, 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 cocxfhd :g 4ngrizf8vb5*9ni e(el5; 818j k ljquld correctly represent the motion of an object moving with q v8iij 5 ge;lrj(f4e8c18k5:lhbfznx*dn9g 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 des+ll0dbr/k6 .vdo6jts cribes the motion of a toy car across the floor for 10 seconds. What i6./o b t+jrdlvkd0l 6ss 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 ty69t*md v n)pohe motion of a toy car across the floor for 10 seconds. What wamnd)* 6v toy9ps 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 acro4lx k)*i;e.rejvs pfw. nf2b)ss the floor for 10 seconds. At what times or time intervals must the net fori*k2se ew.x fbjl)4 r.v;)npfce 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 jd6ss; r*ncu5c tbs9jq-q,+l in 4.50 s. Which one of the following choices bes*cj6j -snru b s+qq9c5d;sl t,t 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 ver3in/v bbu ) mhk7,dd/ysus time curve shown. Which of the following statements regarding its motion m y)d,3und//hbbv7ki 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 accordiv7w:.z43) l yvrrwykv f4qf)g7nk 6k gng to the velocity versus time curve shown to the right. When does the car havezvfw)l4k qk.n :3gf7vrrgy6y7 w) kv4 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 0fh 0- lta3bdiof time, a tennis ball is moved so that the angle between the velocity and the acceleration of the b0i-t 0 dahlf3ball 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 tqy2g/v*q-eg traveling toward each other.tqy*/2qgge -v
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 an v fg. kv wb4)ds+zh+ty6fuks-gba68 ,d increa by 6vaf,uk -tgz6 ks4)fh+sg+wvdb8. sing

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 averp 3j1e go7h sm8cter)+age 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 dimensionsyjcon6ze)k 9bj/5td+, which one of the following choices identifies quantities that must have the sayj9 c5t+ojknzdb/)e6 me 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 1xx f0 drjxl3/qw+ok )$3.0\;m$ 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-ti5eeo7naai62 u me, $y\;vs\;t$, 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-dimebsabe,wk+j,s+oof t 1c :e 2(insional track for total time T in tw o:+sskab1 e 2jbifctwo ,,+(eo 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 car on a straight trackk8wbm k +bq jjq;)e/o9 is shown in the diagram. The thick line represents the velocity. Assume that the cak /ebm+qj8jw; b o9qk)r 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 cpyb24h; rnxp 8ar on a straight track is shown in the diagram. The thicr 2pnyx4 ;8bhpk 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 grapi xhw(7dqdp lli.:rrva q b ,fxn017c:u1-.v xh shown. For what time(s) is the speed of the onxq-0hrdvrx:d(. v p7iqwxu,.lc1 1f il7:ab bject 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. dyih7o+ (avz9udj c/i ,; 2ynmtime graph shown. For whicdyuj;miyo (+h zn7,/v9a2dci h 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 acceleration vs. time gra 4s3 uj)kz*yp1d s(febph for a fixed time interval of an object’s motion, what qujsf upye*s14bz (3) dkantity 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 spy9 j35 +rgpevdu6e;ct q0dw p9eed.
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 zlcswv28 wl *.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 and reaches the aa; dsg meww;3;9lnhg5xr+9s 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 i39 n((qy ,r5+pohyiwfj ygi j*n 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 granaqn4a6z aua 62 xm:m-ph of a particle moving along a horizontal axis is shown. What is the total distance a4a6aqa6 mx z2n:n um-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 correctly ident ys2 -mk( )rb+d6 fksan9oc9asifies all of the listed situationm)s k629 d b(a+csnf-y oakr9ss 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 moving along a lin7a,c; ykno 0hhe is shown. The object starts from rest at ,7haoc; 0 kynhtime 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 itt jb-8xugq(w7q kbe-0s velocity along a line vs. time is graphed. Which one of the following choices best gives08( 7qujg-k tb- wxeqb 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 wine1;e4k 7z+zmjbtr )r5q)dk tth constant acceleration. At an inke)4 qner+;j57z1 db tkz rt)mstant 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 ha1.xb r/e xbv 4lb-,vj8jxl.ogs 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 one a3)j1t2i wn:r lbdi98xq1b iqxkz)h*of the following choices correctly describes the relationship )bw z njqbqi*:h )l128i9dxirk a3xt 1between 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 describes the instants of9og 5h/9 rbq4urqs7 vu time, at which the car and truck traveluq9sur/v7g r4q5oh b9 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 the0a6t* c pq7bi rnsr;m: origin and will move along the x-axis. The acceleration vs. time graph fobrtap 7 qs6m ;c:ni*r0r 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 on a horizontal line btccz rxax,wn 767; o3is shown. At what time(s) is the object moving with its g7o ,x z xn3cb;c7tr6awreatest 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 gra4)dh keikc+* 9qfh5p qnqg )9 qacmw3;ph provided. During what time interval(s) does the mass havcqw*)cf+qmid4 eh9;)9 5n h3q gkqakpe 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
本平台(https://tiku.one/)支持练习,作业与考试(自动评分)三种模式,群组成绩统计排序导出,题目动态变量实现同卷千人千题
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, 2025-11-28 15:29 , Processed in 0.422807 second(s), 165 queries , Redis On.