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 conea3vycx5 j7, bstant speed 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)l *6 mofqp+uw to a particular dir p*fw+uolq 6m)ection 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 circulartd8w:1;v go8fk 4n kje 6gtam u9x+j;n track at an average speed of 50 m/s and then completes a second lap at an averag 6:a8u9xwmd;knv1 jf+ktg j eto8ng4; e 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 /p (sun3yx 5cs0.80 m in 1.0 s at the constant velocity. If it continues, how far will it travel in 3.0 s/ nsu( y53cpxs?

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 aqzp4f b h+(, etfcq9b) 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 on ,94 qc q(hb ze+)bfpftthe 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 100mm q5.+wm3r .xfa5kgi t1; eyd km/h. What is the average speed of the motorist on this tripyrf.mmga .q;t 5 m+ixedk315w ?

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 xfd)+o)f mcf y/ew,3m toy car traveling along the x-axis. The graph shown below is a plot of the car’s veloci,x3 fyco mdf /m))+fewty 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 t,a3pjr yi3 .k5 yog*jg,d6p pwl7r2jehe motion of a toy car traveling along the x-axis. The graph shown below is a plot of the o g,6dli5rj2wyj37ap e rpgj3y, p.k*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 h vwxe73h3 5z ,tg77v udo*- 6axhhuyjmotion of a toy car traveling along the x-axis. The graph shown below is a plot of the car5tdx7y hwoh6he3,3va*vxg 7 u jzuh7 -’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 vy, y4v50ll pehd iq+*gs. time of a duck flying due south for the winter. At what point did the duck st, ylg*0 +lvqyei54ph dop 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 aaw99*b ii:rbrefer to the 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 secr9iabb:wia*9 ond?


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 whichj*vjslu rwq95+ghc oua1 vj( *,jb42h shows the position and elapsed time of a car startiw *v,j* qjh+4sca g9l1bjuu25v( ho rjng 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 time graph for an object with 6hs8 y/,c2 vi;sqmopmfq3n/ywv v /.uthe position time gyw8.mnuq /f6p3vih2so ; ycm, /vvsq /raph 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 ioc9bx.(u 0x zo60y qopml x+:+tfiz0sdeal elastic rubber ball is dropped from a height of about 2 meters, hits the floor and r0+0+p ctxox.o:69msyulbf qxiz( z0 o ebounds 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 questioftj tlt t o81e:abp)5,hto4/en refer to the following information. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor and rebou:5ept8lttf o to41/b atjh,e) nds 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 travefhrrn +.zce 5utf s7i:) puw651husb0l 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 refersry jeckps)o)+ 1dt6m3, l v4zd 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.
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 theq jc.6*bl6 oke 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 -+ g eedc,sw z,ymuffk/6u3v8: 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 scen4mh1edcv 8;32/ma;vtuzh e t iario: 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 o8lj3vbdxi (c8p a+-aw ff the table edge. Which of the following would best represent a graph of w lx3 8b-jd(pai+a8cvthe 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 bhw8 n68womp k nx4rk:4etween distance and time for an object that is movi m okw:4npnhkr4 8w86xng 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 ef)y,26b-g zuk; k tdytime for an object that is moving along 26ukdty-,gykf) z ;bea 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 absmsr/.)x.iypwq6*mwv- nb-o , -xc mn initial speed of 12.0 m/s from a position 10.0 m above the ground. Ignoring air resistance, the speed ob .m/m *.-s-nix-yw q6,wobsmc)pvrxf 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 uniformly -x eiaq)*gt )iaccelerating across the floor. The time and distance traveled from the start are si-)te*gq )xiahown 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 re6jow4lwd4q g6 presents a toy car starting from rest and uniformly accelerating across 66w dow4q g4jlthe floor. 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 uu dv6vjb;1-i nckf37car starting from rest and uniformly accelerating across the floor. The time and dist nu7- ibjvdkf 61;uc3vance 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 3w:f*zg np5ojball. The position of the ball each second is ind5 zjg*fo3wp n: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 shp/l ncdcasri9li(p0u , w7+v2ows a uniformly accelerating ball. The position of the ball each second is indicated. dna0, vscwl(7+p/liri p uc92
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 uw 7garrv9n:(+ f+vvzr nicycle moving in a straight line is shown in the gravgfzvrv:w n+a9+ rr7(ph 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 unicyclc62c*wi9, 4xveybup4 o pz em0e moving in a straight line is shown inoiuz*29 bp6evwx4 4,e0pc mcy 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 faqozqn 5: (a9hdlls 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 accompanying graph describ 2iwa8f)chpbj*quwy v6/fe 2 u 2jv0(xes the motion of a marble on a table top for 10 seconds. For which time interval(s) did the marble have a negative velocib/uf 0fvw )hxaiyc2 *2 jvupwqj(26e8 ty?


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 describ(v9t g3-mganqe(2v 1z7msdmbes the motion of a marble on a table top for 10 seconds. Fv3vg-1nb zgtmemqa2s d9(( 7mor 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 on a table top eu.j5dz b.1p-z giu(g for zu(gzdib p5.-g1.jue 10 seconds. 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 accelerateniujzq,6 a 2i)s 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 af8je 3sx r2rra1ma6zsz7w/ e + 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 (xe tx83 ukl/ j oa3o0m*a-dlm*)amfarepresent the motion of an object moving with a constant speed in a straight line? xm-)malod( *alemt*u o33fk ax08/aj


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; a.:ovyu5mhj g8se6txe12xc toy car across the floor for 10 seconds. What is the acceleration of the toy car a6 .1o ;gxhx5va 8uj et2my:cest 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 describes7f:l0*8o/eeh uz l 5cfclkjp1p+j1 cz the motion of a toy car across the floor for 10 seconds. What was the total displacement of the toy car for the entif8ec1/hu 5ollcz1kj:l p*p7fz+cj 0ere 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 cu/;w7x*hw gz c4,i zjear across the floor for 10 seconds. At what times or time intiz *,hcuew jz/wg74x;ervals 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. Wh5*1qo (jlw3t xl*kscnppflf+0;j*6 0 diraa xich one of til* +afjpd*xcx6o w 5j0 n tsa lr3k*p1l(q;f0he 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 wktqld h+6a3 p-f+p81xn 7juutw3pp+ shown. Which of the following statements regarding its mfau+hdq wtpln+up6p37pkt-81 j w+x 3 otion 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 versus time cub7q ;ztgp+wy/m6 da9k rve shown to the right. When does the car have zero accez q9bw/ mg+tk;ad py76leration?


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 tim x dwe .1djfld o-t)ez:dxi +k.jj n-s901z:gee, a tennis ball is moved so that the angle between the velocity and the acceleration of the ball is kept at a constant 0 -tl1kfe.n1j.dsi9edj)g x e wzd jx-: zd+:o120 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 traveliyd oxt/fqt(1bm9 q x9)ng toward each other.mx/y b)xqtd1 9tq( f9o
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 posita;x1b4c) v x ab-upls2ive and increasinca) bbv u-4;sxlx2ap1g

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 8u wk1gh3st*e of average 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 dimenpq (y;a vc4iw8lky;j qmi4:i y(x-f,w sions, which one of the following choices identifies quantities that must have the same direction?q (4y w 4i;;:(il -jkp8q,vawcf ymxyi

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 9 ytv-ovm;7lszhf6j gfjs3)e59 6 h vk$3.0\;m$ 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-ti a+mk vv f7(jsu,pb24ime, $y\;vs\;t$, 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 time T eknuj3 9, 3*cg vpjqn8in two parts. *np3enkj3 v89ujcg ,q
• 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 z9 q.:yq*0s9x)ksms (+cf3iuwzop uomotion of a car on a straight track is shown in the diagram. The thick line represents the veloczx.os 9k*iqz cmf(ou +s3spq )u0 y9:wity. 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 ;a 7qce+dts0ld7g ai* is shown in the diagr +a;7d 7cetsdgalq*i0 am. The thick 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 graph s0i433y )f h) hdmgwrnvrz+.ksy ,u* gjhown. For what time(s) is the ss*h4,u+w dg3.vzi h) 0nm 3yryg )fkjrpeed 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 obj0ul c(x8-9vc9;l6sujqg mou oect given by the velocity vs. time graph shown. For which time(s) is the acceleration of the object ejvq9 c6 uxclmo9l(-ou8 s0g; uqual 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 grap*x-uu7ocz 4ryh for a fixed time iou*cuy7 x-r z4nterval of an object’s motion, 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 horibp6x7 a/ag/y ezontal 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 partc4ztvjijhm;*2 h9)wz s:
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 /hkv y4h-vep) is released from rest 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 the ground in a tj1l:ws p4h1e uime 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 moving along a horizontal axis;kpr+y ,lsx ;j is shown. What is the total distance traveled sjlxy; +kp,;r 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 cheiblq3mw7 qsf);jz/do 9l v /c8a0. pkoices correctly identifies all of the listed situations for which there is a non-zero acael/ 0d/o)7zm.c;lp 3j98qb v qw sfikceleration?
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 is.d41srfflf gp3nbi) 4 shown. The object starts from rest at time d.41pgb3)4lfffi s n rt=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 lu4a79 n-awyb line vs. time is graphed. Which one of the following choices best gives the proper interval(s) of time for which th bulna-ay7w 49e 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 ;sbbuog-u*v .track, each with constant acceleration. At an u*gb-suo. vb; 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 av- lhcbc9c5n u)sl*i* 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, which0h bfew:l5lik0gag 1. one of the following choices correctly describes the relationship between the average speed of the truckg:hwbeai lgk.0f05l1 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 cav (zry .,jnf.hoices best describes the instants of time, at which the car and truck travel with ta( . r,.zynfjvhe 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 origin and will mo/o2g *qicv:tjs/gpua/t) e)s hs -hz1ve along the x-axis. The acceleration vs. time graph for each car is shown. Which one of thei)tj / hs*tss za/1cgph )g/ qu2:vo-e 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 mo l ttz*-+uu1zhx .:umxving on a horizontal line is shown. At what time(s) is the object moving with its greatest spe-u*u1tu x. h +tlxzzm:ed?


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-anp8yk b/c el(nq) k9n2oq.t/kxis following the position vs. time graph provided. During what time inter ok/qt2/.epnq(n9l8)nckby k val(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, 2025-7-17 06:48 , Processed in 0.526385 second(s), 165 queries , Redis On.