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 speet5ay(mug( :ui xj:eo 45n 7vyad 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 p+) z(t8e ivxqr4 3g(kxn9yy3vggw.vj articular direction is calle3vx yvi(r)q8yg +jz9newx(4tgg3v k. d

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 compl3kn/ ;mm9+jm5pf yxqjetes one lap around a circular track at an average speed of 50 m/s and then completes a second lap+ m5fjq ym/mnkj3;9x p 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 qy 4tlve2. k/win 1.0 s at the constant velocity. If it continues, how far will v. ewl/qt k2y4it 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 is0uisi,wbks(i11y rz; stationary on a 30-kg plank that is sliding at 5.00 m/s to the right across a frictionless pond. The boy then turn,zb;0iuwisysi 1r (k 1s 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 km/h and 400 km a xxrnm17br 4cx(py8 v0t 100 km/h. What is the average speed of the motorist on this( bn 8mvrxrx041px yc7 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 ofpumt;/ r +x6uxzmf7 719x(ueze f avk7 a toy car traveling along the x-axis. The graph shown below is a plot of the car’s velocity in the x dir kxtmpmfuz1;9x/u 7 afe6 er(7x7uzv +ection, $v_x$ 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 traftr, lk;+, haozzg4r 6+ ybdv:veling along the x-axis. The graph shown below is a plot of the car’s v4drh r++fbz :k, ,z6altyg ov;elocity 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 9ymahe - b9c+wgwx+kz7eos+7 traveling along the x-axis. The graph shown 9x7k - bc+++e 79emhoz wgayswbelow 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 velocity vs. time of a duck flying due south for t(31cx bxm5 nmrhe winter. At what point did the duckm5(m3cx 1b xnr 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 position and elan9n ehu:w xz ,xcz,m +z6enq;+psed time of a car starting from rest and uniformly accelerating in a straight line. What was the average velocixe z,zz+w uh6qc e;:xn9n, m+nty 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 whiw2x. vwj cp55rch shows the position and elacw5 2x pjv.r5wpsed time of a 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 jhoezq/6 q0dn j1y38t time graph for an object with the positt8jz 3dj oe h/y016qnqion 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 questionst1(qd)mpiy :h;bgg 4 refer to the following information. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the fl1;gp yd b:g 4m(hqsti)oor 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 ggqen- j0q,; wrefer to the following information. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor and - gngqj;ew, q0rebounds 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 canxws 2fb7f-y1 dqi; b;o travel 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 sl fwmwz31o7rv4xe -y, cenario: 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 followosw.bk cm.)jkp )/3aping 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 fol)k blan 4-yel8ca2 l5a8ggre:lowing 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+d: 8u nv ohq,ct7hha:;-lrtc3efso2u 2e p4 r 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 ramp, across a horizontal table top and o24i+-tcmz +p5dmn+ qiy7;u tmzycfd* ff the tablei+y5qnt+y dt7 p-m+mi4cz;c* 2 fdmzu edge. Which 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 distance9qpg0z3 wkmw 8.yar,g and time for an object that is moving along a straight line. What is the instyq3ar,8g9wk0.w g pzmantaneous 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 repre yz/(,67pac:d f+5exorn btnusents the relationship between distance and time for an object that is moving along a straight line. Between what times :5p (ya,tz+cnonx /u r76efbddid 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 initiau d9; k9gq1sw+feebj(7rp ws1 x :n9tjl speed of 12.0 m/s from a positionj9w9fes :p1 j(d+ nq xkr9s;wtb e17gu 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 * a/ovtnhh32 wsx f(-mand uniformly accelerating across the floor. The time and distance traveled from the start arn(w3f2xavh* o -h m/tse 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 and uniforma*g tr82f y5mvx.sk5wly accelerating across the floor. Them *krgsyf25 8x.5twav 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 belivldp s(lt sbew2() 1(ow represents a toy car starting from rest and uniformly accelerating across the floor. The time and distance traveled from thesew)(b l2v((l it sd1p 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. T j/ dbcr69u4avhe position of the ball each seconbarud4 v96/c jd 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), jiuzzc1cm+ accelerating ball. The position of the ball each cjzci )+zu,1 msecond 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 a straight linedu1q;iem51fo aw1m2;0i li vl is shown in the graph bel wm5d;;vlf0oie uii 1l2qa11mow.
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 a straight line isv*2w e l.av3tl shown in the graph evl2t3l.w va* 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 earbulpwx..c b :zywuvp+n5gi30n4( qa l)b+a:sth

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 lk jzngua y5:) 1vcyc9e31* sbg(t9vi7,ravh of a marble on a table top for 10 seconds. For which time interval(s) did the marble have a negative ve 7*c(latz1vhi ,k9n3g9 1cagvs :)rb v5uyjeylocity?


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 1qg)j,q0 ixh . hu/ v;ff/gkcta table top for 10 seconds. For which time interval(s) did the marble have a positive ac)u ihg;c/h/qg vx0 qf.fj,kt1celeration?


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 mot ,q w)00nj kgvtywve j;4;w7nwdt +b:m-e u7ifion of a marble on a table top for 10 svewwik0n j d7+q 0b,t;)yw;wg tf 4eu-m7n:vjeconds. What is the marbles average 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 forjmz 7w:gia gso;-mrh,n t: o-).kdhy, 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 straightm -yr1dgk9 gw: downward 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 correctly r f .x+ g95kq:vpxzxvk1epresent the motion of an object moving with a czk :xvk5g.xx+fp 1v9qonstant 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 grap2 kekcgy,-ge1qtc 37t0hj(4bbtg/w y h describes the motion of a toy car across the floor fo tb, 2cw k 4t0kyj/cqg71gtybg(3he -er 10 seconds. 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 motixjwdgps6mg7(fhu.1 3 on of a toy car across the floor for 10 seconds. What was the total dispw7shud. g3j( 6xgm 1pflacement 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 carba9oo e7+.mi)8s pbz d across the floor for 10 seconds. At what times or time intervals must the net force on the to.b 8ompbzsao7 i 9e)d+y 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 ,tnf9 , w zppxr9x83qg9r9wedwz 3om* km/hr in 4.50 s. Which one of the following choices best represents the acceleration o9 gz338m9 tz qdwp,*xpn9 rreofwx9w,f 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 followinh3vr.5bgxrcmo c ::dk5 u (bz3: lo8ing statements regarding its motion is NOT CORr8v5: c .m5:izn (xb3rhk lbodcgo3u :RECT?


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 alon5)k zgiyp+pmh2m1qz , g the x-axis according to the velocity versus time curve shown to the right. When does the carmp y,z1piqhk5 + 2m)zg 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 angle b. ta6f pm .4vh8+() khnc4tts1 sf*ypuz t8zeoetween the velocity and the acceleration of the ball is kept at a constant 120 degree. Which statement is true about the tennis ball ty. + z thopv tssk44z.an*t(u)ff 8hcep816mduring 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 zz 7gvp;+hk5s and traveling toward each other. g+ zv7;zkh5sp
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 xj1vxdwe1 0ypj 3fy9w;-axis. When the acceleration is positive and increav ye11;p3xw90f wj ydjsing

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 velocity isoxh 7:vr6i(s+i66 ktfl oe, gf

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 follow zlir/qp.;0 0fghr; ruing choices identifies.fur l g/zi;rq0h0;rp 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 moveb v6 azl)rv8kb; gro0i c3w1jhpsg*85s $3.0\;m$ 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)a5qq mo v1/xg, $y\;vs\;t$, 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 tvs(+ h-vb3i -y1gz wquime T in twoq(- wi-ybush3 v+g1 zv 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 st5;bd3b9 e zea 7sf8x:9 ghoimdraight track is shown in the9x i 5:b 9sobe7ghfad8mdz;3e diagram. The 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. tio a;bhignvo pimuq/ v5n*+ r9,0p *7xhme graph for the motion of a car on a straight track is shown in the diagram. The thick line represents the velocity. Assume thanu70mo5qo*xpg9n ; iv,b hv+pah*ir /t 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/n0ufb;/-in7 ylgi pc the position vs. time graph shown. For what time(fb cii u0 p/;-/7nlnygs) 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 ofbpz3 g6j6 ogd9 ct)zw; an object given by the velocity vs. time graph shown. For which time(s) is the a g)gwzo6c d9bt3;p6z jcceleration 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 t.hl p56kp b1: rh;v1z cc4odgohe acceleration vs. time graph for a fixed time interval of an object’s motion, what quantit4gvzp1; 5och.dkorl c1:6hpb y 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 ap dovdaq/ .5gs fcc4z)8/7i;t1 lvxodan27qllong a horizontal 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 parts:5 jwz yca6e8 2dpwc2.m
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 inz,u, nx/ a);tc p *ofghl5he,i 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 rxcg*-t a-g +gbunjmhzd0))d. eaches 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 gou/g1fwq4v oe /e d di9t,6n2ofbm9j+raph of a particle moving along a horizontal axis is shown. What is thwno9td/+,f 2ogvmiub4eq d e 619jf/oe 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 followice tv j0w::gtm hj5ui/8w+ z vtv0h48bng choices correctly identifies all of the listed situations for whm:v80 0gu h+4h w5itv ttze jcvj:b8w/ich 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 movin u. )nrnnxcgh9a 1y,)ng along a line is shown. The objectnxacnr1u ) y.gnn ,h)9 starts from 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 thekqw6 pit 7h5/li g3s6qbo8)y r origin and its velocity along a line vs. time is graphed. Which one of the followingwpqlki65/8t 7y oig )hs3r6qb choices best gives 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 tr6feiqsltm /wdgxek9,*:j g1; ack, each with constant a; g fs d,qw:x em*g6let/ikj19cceleration. At an instant 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 has a posi whx ;:l7u2kk7hy )p7vh.u tmttion $x$, 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 tiu idlzo;q;857mvmb 0 sme shown in the graph, which one of the following choices correctly describes the relationship between the average speeoi5vsb dl7 m80;;qzmu d 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 followa pwglq9,.7qm8 i ahm9ing choices best describes the instants of time, at which the car and truck travel with the same spe.lwpg9qm7 9ma 8i h,qaed?

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 ori5-a2up xce z 1w( g5xn,*lqfgbgin and will move along the x-axiswngxbq -e,g l*pa2 u fzx5(15c. The acceleration vs. time graph for 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 -/ikf0 3yyjn/ 7g;iqtz.f*n be vm xb98f.s hfis shown. At what time(s) is the object mo9n -m fy8fh /sz/ktq0.iv3ybbji x7*;ef nf. gving 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-ij4y7 li(6me,wj*mm oaxis following the position vs. time graph provided. During what time interval(s) does thii4*,mem7 lj(j6wm o ye 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, 2025-7-11 16:48 , Processed in 0.520606 second(s), 165 queries , Redis On.