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 7rzh 4 og9up; bg.s7piof 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 dist2e 6abox4 n,vaance per unit time without reference to a particular direction2a 4 oe,xan6bv 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 o3/j 8rso7pr hu rwjj:,ne lap around a circular track at an average speed of 50 m/s and then completes a second lap at an average speedjp,o/:3rjr us7 h8r wj 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(z/rf-y9segxazg ; fcj/k7o * at the constant velocity. If it continues, ho* o7;/ajfz (9 x/kezc -gyrsgfw far 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 plank us. ur: 98mizvthat is sliding at 5.00 m/s to the right across a frictionless pond. The boy then turns and starts walking on the plank at a rau. :r9iuzs 8mvte 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 is ltx 4b)i7697)d tej gbaqpc0fthe average speed of the motorist on this trip?if6d7pe9bg) 4 jxtab)tqc7 0l

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 hlf+lx2ke *0e mm 6*jvtoy car traveling along the x-axis. The graph shown below is a plot of the car’s velocity in the x dirjm*mv e e+l 2hlx0k6*fection, $v_x$ 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 alonguv d:tvm,k0 43w.vuh y the x-axis. The graph shown below is a plot of the car’s velocity in the x di wtv.4vhyu3, kmud0 :vrection, $v_x$ 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 ofadf)1.gxl450ukg qowy(xl s 8 a toy car traveling along the x-axis. The graph shown below is a plot of the car’s velocity in8) 1l04fkg 5yqosd.wx(xlua g 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 m.,)ye) qxs hyk(xk lk1;z4czkgs o.2the velocity vs. time of a duck flying due south for the winter. At what point did the duck stop its forweg cx1q mz ,s.k 4hsk)zko2k;lx y(.)yard 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 th1bvw7t/3qa 4ihyeu 6 :zc/ zwce diagram below which shows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight liney ucie: 4vqb731w /a/tch6zwz. 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 whichap /2jz2*(nhzfpo,zv shows the position and elapsed time of a car starting from res,( ofaz zhz/n j*2v2ppt 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 velo7ia+ v qygs0)ycity time graph for an object with the position time graph shown in the diagram ay+agvs)i 07qyt 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 followingd .unm,zmwjq1or *n3 5 information. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor and rebounds to its orignj1.u,d r om* mnw35qzinal 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. An ideal :ha za3sm*3 kfelastic rubber ball is dhs a*:azkf3m3ropped 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 ze a-tegnze ,0 rqu3fv-8)cr-:j -l ;8ppoxd vwith 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 follosv:6c7y kt shx qup,*, (a.lty5 e6bhrwing 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 thgt:96ofgtio3 f nla*1e 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 following scenario: At la2zs3s jd(qcem2 1l2 $t_0$, 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: /+jnb*go0uv fs9shp 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 down a ramp, across a horizonta*:9w jwaa8 v-; xjvfarl table top and off the table edge. Which of the following would best represent a graph of the magnitude of the ball's acceleration vsafxa jr8wv:ja 9 -wv*; 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 s3)54tlzzk xvpbzd*4and time for an obje3vlbszdp4 )kt54 zx*z ct that 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 b1tu*:m)d ahwqj1 r mt;etween distance and time for an object that is moving along a straight line. Between what times did ) r*mt;w:1hqmuatd 1jthe 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 do.g;fwu 4iruf1 wnward on Earth with an initial speed of 12.0 m/s from a position 10.0 m above the r;f. 1gufu 4wiground. 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 representsu h)56esh:fgr a toy car starting from rest and uniformly accelerating across the floor. The time and distancehf6 g:hr )e5us 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 represenv8 3keaz qjp 0c-0a8lots a toy car starting from rest and uniformly accelerating across the floor. The time aav0j80 za-k qcl3 8oepnd 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 toyf(a-k e g1mnq7so 7cf2 car starting from rest and uniformly accelerating across the o me(7c1qf- n2fgka7sfloor. 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 positiou8nwu1 o e9vl0kdv2e;n of the ball each second is indicatedole dvknu2 8uv0w9;1e .
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 f+gl*1 x( 0tnijysw.peppv,6 accelerating ball. The position of the bally,v .pl0 ej(fwpx*6nps gt+i1 each second 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 t9-1 n c/ z24vjl-3rikct zdu ;obfop(on a unicycle moving in a straight line is shown in the graph below. vktlcd- zu/t(co;n-2o9rb 4ji 1p3zf
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/4u:5s73 n yd(n : vvfy )n; olwnwcwnotrm*4c line is shofo3 vn5y:vwr/yscn;)wnd wn(4n: *m tc7u4lo wn 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 surfac s ko,:,tcbj6:bw* pale 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 motios6y/g0 /ancc z xv98nqi4 hcl3n of a marble on a table top for 10 seconds. For which time interval(s) did th89cx s 3/ahygz /4qnlc0vc6nie 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 describe 00sq1bbl t:o rfrmy*3s the motion of a marble on a table top for 10 seconds. For which time int 10*tmqrs0l y frb:o3berval(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 maro xhgq.*f/o(rx aie2onu +d 1(c)5exvble on a table top for 10 seconds. What is the marbles average acceleration betwaf.)xxc+deoe15 q2i v*(hg (onxrou/ een 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 accelerat8lwvj+agj/ y . o*3pkugz 8sw:es 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 downwa nybo)6h 2..sqbp yhz,ra *tz uuul-d3sd 4*:ord 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 represent the motion of an k4 97b:iub t22 cofv 0gkwbor5object moving with a con 20cik4fw2 ru5o7g9:bobtk b vstant 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 motid lbt(5ft+l.az r r/1ton of a toy car across the floor for 10 seconds. What is the accelerrl 5zd+tt 1 frbt(/l.aation 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 b*1f .o9 )su)hffidenthe floor for 10 seconds. What was the total displacement of the toy carod)u*heis1 fb)nf. 9f 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 descrj +jcfw q26.j /1uzpagibes the motion of a toy car across the floor for 10 seconds. At what times or timpca/w zg6f2.+jqjj u1e 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. Wul8q4u ob) zvqio.vt: :1zor. hich one of the followino:o.uo t1vqul 48izzr )q .:vbg 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 vn(fem v g;)+zbersus time curve shown. Which of the following statements regarding its motion is NOT CO;gbvn e+zm)f( RRECT?


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 tt2+ que0+ ;duckq ayz;he x-axis according to the velocity versus time curve shown to the right. When does the car have ze+y ;dktc+uuqea 02q z;ro 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 tiy2tn(-xh/ 0s)as ofyv:d ;lrbme, 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 statement is true about the tennis ball during th bysfr/va)nxo0 (s2yh; -ld:t is 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,hfnf:x 5j cog4yqk:- apart and traveling toward each other.4qfnk h5:fc:jg -yx o,
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 acceyxo +9p-c8 vp.enxf- ileration is positive and increasin9ni-p . +8 eyxoxcvfp-g

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 vel 4a3s jsw)mlq7ocity 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 followp0 x)la+2u g w-kkkmp4ing choices identifies k4mkpka- p w+ )gx20luquantities 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 moves 4qicbk.u 1px 7$3.0\;m$ 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-t+cbxw,*x v qk8.n)ywiime, $y\;vs\;t$, 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 alonge; *qjsf*euffsmwa) r8/gd 80 a one-dimensional track for total time T in *;e*wgq )0sfaf md/rsje8fu8two 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 8qli::z/erit5um4 *milf ib* track is shown in the diagram. The thick line represents the velocity. Assume that the car starts at ou4z/lf iqe *m t* mli:r:i58birigin $x=0$. 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 tracswo a8,- :l5ptx,dc pg0nj(gm ku);lhk is shown in the diagram. The thick line represents the velocity. Assume that the car stmpl :x)8tgs owc, 5k(u0-j,la;dhg p narts 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 graph s9xypx o-dy0 orv:5f+ xe*xt8yhown. For what time(s) y 95 fxtrxopoyed 0y*:-vx +x8is 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 obj059tib 4 e:,o9qji4 dhtyor ecect given by the velocity vs. time graph shown. For which timcyt0eqhe:4jro9d45i t 9oib,e(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 graph tmg k 58oph /tdn:5go6for a fixed time interval of an object’s motion5 kogo6dg8 :pm/h5ttn, 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 li a*0q k1vlo 8xitmvo-.ne 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 (3(bnh qqv(8cb9 :wm qva1oycin 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 ground in a tvquk1 5ms 1sj5ime 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 toe0xf-:c hl0 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 particle motrgfd; k1a)8*6l9cn-a );iizrsl orrving along a horizontal axis is shown. What is the total distance traveled by the particle from t=0 to t=10 ;srcako 9d )6frtai 1n;8lz*lri- gr)s ?


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 identifies lambnad: // .kysp:nz+sc7/rall of the listed situations for which t +mz :rs/:cy/a.d 7lsn/abnkphere 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 akt436idf0 tqe3dqe) a long a line is shown. The object starts from rest at time t=0 s. At what time0q 34k dt)36 fqaitdee(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 its2.hithgz8;iyj g :s0s velocity along a line vs. time is graphed. Which one of the following choices best gives the proper interval(s) of time for which the object is movi0hsgityigh. z ;s28:j ng 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 ysnmjk17e : .cr2is-xe k63csthe right on a horizontal track, each with constant acceleration. At an instant of 2sycx3c em-r seij. :76kksn1 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 position ri/6y uu, 90hj+f vy,0n gyjw1tbda1 f$x$, 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 onsnp;t qytb: ;2e of the following choices correctly describes ;2b:tpqs y;nt the 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 the followin hls telyd w5 ;ixd/4f,b(*g;kg choices best describes the instants of time, at which the car ;/hfl syk4iw5 b l*dextd,(g;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 rest4ndhdc6j 3q q5 at the origin and will move along the x-axis. The acceleration vs. time gd h dc3jn645qqraph 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 h rn,4r4 j6(wk2k/df -xgfca gcorizontal line is shown. At wh -(kxf rgnwf64kradc2cj/,g4at time(s) 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-axis65kezi lfjz )5ar+,) khx q(ay following the position vs. time graph provided. During what time +i6,k)rqk ) y5j x(azaelhz5 finterval(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|使用帮助|手机版|切到手机版|题库网 (https://tiku.one)

    GMT+8, 2024-11-23 20:47 , Processed in 0.466136 second(s), 165 queries , Redis On.