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 constantsr*,zy1ulnst 6c5.l;eda/a w 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 withu lb5r,ikrm7h *.kkf- it3u:jout reference to a particular directiouhm r 3 7ki,uikk-jtb: 5rf.l*n 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 o0 m4(1fd 7a fw5herhhvne lap around a circular track at an average speed of 50 m/s and then completes a second lap at an averaghfwfrm dhev57h401(a 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 0.80 m in 1.0 s at the constant,wl;cn0/ -- .rc:ukyn mhal gr velocity. If it continues, how far will it travel in 3.0/ wyhm0 ac n g-u-;rr.l:,ckln 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 t y 6+s:n*du/v cw(wep7 pv2i i/5bodulhat 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 rat2 dlw/diu7: e+vpns*p 5ui / vby(owc6e 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 kma i.xlx3m4,v b at 100 km/h. What is the average speed of the motorist on this t,x 3ivlaxmb.4rip?

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 t oyb;xoe32:o2aj8r:zzd :uv ooy car traveling along the x-axis. The graph shown below is a plot of the c:yoo 2ou 8zdax:z3voreb2;:j ar’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 m) v1kgubcy xcx5obtk/2. 0 mlk32(viyotion of a toy car traveling along the x-axis. The graph shown below ixk2y5gbkc2.310 / ixl )o bmkuy tv(cvs 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 motion of a toy car traveling along the x ;xf c+xzm81x:w/ puxcm(s4kmoa 8dc) -axis. The graph shown below is a plot of the car’s velocity in the x di88 wm p4a):1m x fcxxc/m;k(su+cx zdorection, $v_x$ 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 dui fd)z16aiy i6e south for the winter. At what point did the d y6ifzi1dai6)uck 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 refa7 h ef vb *dg,ik4tbk/*pd*d(b;sgk8er to the diagram below which shows the position and elapsed time of gb7*bbk4vh*tdka; g(fse*d id, p/8 ka car starting from rest and uniformly accelerating 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 reft tlgq8 u073vrz2so;g er to the diagram below which shows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight lit0 s38lv og2zurg7;qtne. 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 wit z5*g.svgxz/8 dka5dph the position time graph sho5pg*ksgdz /vxa.85zd wn 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 y0fvot.vxe gwv q0+6c s9g:*rideal elastic rubber ball is dropped from a height of about 2 meter g+ fg6w c0yv exv:so.90tv*rqs, hits 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 ip(4; 5tzt7akzny1y, nfzj0 r anformation. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor and rebounds to its original heijy0k, rna(n 4p7tz 1;ftz 5zayght.
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 trave blfps :3z0x ou3ap8*/csnmf9bz t46 rl 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 scenari hc+ yjy./yu/ce dae*;o: 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 mp t9vssjo:xt8i5q; 4refers 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.
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 refcqz8j.mscoa ,e/8a2x- t 2py s;nl+ byers 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.
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 tf yak4y 2lt087o /nqa5jyrz -ehe 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:.grdl sxlv.ke( 1 8od ramp, across a horizontal table top and off the table edge. Which of the following would best represent a gra.rxd kl.o1 e8g: (vdlsph 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 for aqz9zd)bsvvna ;/3c /+e y.gl on object that is moving along a straight line. Wh /lb9.a nyo3cdz qveg);/z+vsat 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 rev9 wn:* *umc*hemq2y elationship between distance and time for an object that is moving along a straight line. Between whatem *9*yhc w2e:nvm q*u 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 o4rdyb o7n9oao x29qaky 7pgqx,3+0c w n Earth with an initial speed of 12.0 m/s from a position 10.0 m above the ground. Ignoring air resistance, the speed of the7o xr4d9237p nbow,oq0a9k+ gqyy a cx 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 represent6 eazjt,t 9nzd*qbd-1s a toy car starting from rest and uniformly accelerating across the floor. The time and distance traveled from the start ar d*b 9z1-t6jetadznq,e 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 represents5e j38x20,9w 9l kdn pximvats a toy car starting from rest and uniformly accelerating across the floor. The time and0w,v xjaps59e t3 92nid8xlm k 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 car sta.jsibh 5hxth-m1bd3(p;pv q,bii f+y2/wi* zrting from rest and uniformly acceleratinhd+x- , 5.v/ibfybhsqtjimb z3i12 hp;p (w*ig 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 acx2 rvcvz+ f).e(6o4;m t+ukw w5wpkai celerating ball. The position of the ball each second is indicatediwk avvop;x wrk( 4um62f+).zw5t+ ec.
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 position of the ballnw3ad51i h/b1qo eq i: each second is indicateaown 15:1qbh eqid3/id.
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 unicyc6m5smp+z9wnu.t2x /5ld xhj wle moving in a straight line is shown in the graph below. 5/mxwz6 n hu+jsmt lp52w9.x d
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 vls*.jpj4 h) jis shown in the graph below)j* svjjh4. pl.
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 surfj.a+pfvwrc*k hukh7 2l6o, btizau342w zr39 ace 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 descj26++ ihaina 3o*+z pej1l dzbribes the motion of a marble on a table top for 10 seco3z anz1aldh+o ++ii62pejj*bnds. 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 the motioqs/qxx zgvc3tm0mf-4l/ w3 mv6 ;ncu0n of a marble on a table top for 10 seconds. For which 6s0 xfwcx/ml 4um3/-vz t0gq c3v q;mntime 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 descrg sf wf,nq+im++r6 2jiibes the motion of a marble on a table top for 10 seconds. What is the marbles average acceleration between t = 3.3 s and t = 3.8 jmf2+ fnqswi +g6, ir+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 acceler rpb/w(i8i7s qi jqk5 2v)8r7 u*bubulates 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 straighto *,mpm*g c9vd 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 represent the motion of a zb mw.zbya7rsy1+yo8g, l*4yn object moving with a constant speed in a 4z m ol1+y ay. w*z8ysgb,yr7bstraight 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 ua m-fl 55:ohqthe floor for 10 seconds. What is the aa- :hfm5oqul5cceleration 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 to dmue1,bsmek7a2-j a5 y car across the floor for 10 seconds. What was the total displa2 eu e17sd5-b,k amjmacement 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 t7 tuvt2axv/0eoy car across the floor for 10 seconds. At what times or time intervalsv2xa u te/v07t 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. )ru,fz0w asz. Which one of the following choices best r).rz,0z wfusaepresents 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 velociz+1upgwy5 k.aty versus time curve shown. Which of the following statements regarding its motion is NOT COR.g1wa5kzp u+yRECT?


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-axis8r5os 38z tb/j/oskg t according to the velocity versus time cu o/sgzr8 tt3k5b8os j/rve shown to the right. When does the 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 interval of time, a tennis ball is moved so that the ang.hzl4,f ho/ omle between the velocity and the acceleration of the ball is kept at a constant 120 degree. Which statement is true about the tennis ball duri z.oh l,mf/h4ong 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 s3mdozc3 dq),jhqp:j, sl1nzin 11x-and traveling toward each other.3xl z:1 qcm,z -n jjsds1p h1din3,)qo
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 thec. q; e7(erlf4(2 3f elftj kuew8+far acceleration is positive and increasi( al2f q3w4f .ee rr8ulckej;fe(7 tf+ng

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 yoof;1 r(g05vmg 2snaq: kc h;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 dimensions, which onq:2s tmr),o ugl4o9iie of the following choices ident is2o 9ogumq):l4,ir tifies 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 moves tf48 *q1yhycyc9fbbd6(yu o6 $3.0\;m$ 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, iudo6c)hsyp5 (f-zw8$y\;vs\;t$, 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 ri,.czy;*un p3wk n dq nxid:/h.ght along a one-dimensional track for total time T inp*3qnxcw.uin.d,kz/ ;dh:y n two 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 straisy-w lngx.5h/, bztcm z.5z22v 7uzpdght track is shown ./p,uzvz - t7yc wxm.zl n 2gh52sdzb5in the 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. tim6x6wq m: ka0ezety(0v9s(nd83hn x p fe graph for the motion of a car on a straight track is shown :6n((k3tfemp9y6ne wqzx 8av0x 0hds in the diagram. 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. t9nuh ng48z 0svg/hik*ime graph shown. For what time(shnknv h9us 8z0i/4g g*) 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 4r6xf nm t cau0x544i)jn sk7sgiven by the velocity vs. time graph shonu5 44tkx0cjsn 47arxm6 isf)wn. For which 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. timx(pm,si0( rt h;x04/v pehjs ye graph for a fixed time interval of an object’s motion, what quantity has been determined for that ohp4hr0tij(yx p se,s/ xvm (0;bject?

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),gxit zbip3 5e*f4*3 s4drpo ab0 nfz.
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 tukx:6paqpp; nw ,(jwk, jl 7x-wo 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 releas/;mw7o +kgsga p2l9 7r/pbb nls9lf,ned 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 thbd s+lpf/q ,;ime 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 horizoj hg aoxx7qh,ius5bf7w: t, 42ntal axis is shown. What is the total distance traveled by the particle from t=04 7tjxwu : 5h7x i,fs,bog2ahq 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 corr) a df0f)utj2l7ke ip+3jq)t gectly identifies all of the listed situations fi) fg20q)jd tlta 3kpuej7+f)or 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 obm9wm*a*z l u*jject moving along a line is shown. The object starts from rest at time t=0 s. At what time(s) does the object attain a maxzw9* a mu*mjl*imum 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 is.ekznv*d b, j,87uzk ts velocity along a line vs. time is graphed. Which one of the following choicesz,b.8,u j7zskkv * edn 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 rj iw:0 oxduoeb 5)24zthe right on a horizontal track, each with constant o4 5jxdb uiwre2)0zo:acceleration. 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 613s744qg. rs.a2,lx zj ninuovm dru 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, wj3a +os9um ob qri:,di4e)4uzhich one of the following choices oi r bo)4jia3, d4sue uq9+:mzcorrectly describes 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 following choi/rf: saybx)ofi* (63mgi ky7p ces best describes the instants of time, at which the car and truck travel with the same speesoby k*xffp) /i3 6ry7ig:a(md?

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 f3yo,xy4o 5o;k.t )e -(xuem 0l lhseemove along the x-axis. The acceleration vs. time graph ox yue)te3 ksy0- ( .l4;omh,ol5efexfor 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. vdfzud5 vnwb8;/ ; c+ez l4t;stime graph of an object moving on a horizontal line is shown. At what time(s) sz4;evn /vdl;+w8;b td5 zcfu 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 th3e)zx-)y ja wvp fdsjc0o: a9v:1r7rne x-axis following the position vs. time graph provided. During what time: )01e7-wvrjo and zx:93 vsr fjcyp)a interval(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, 2025-7-11 18:36 , Processed in 0.440168 second(s), 165 queries , Redis On.