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 speed around a circular path of rad7 z.woun*3 rjuius $R$, 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 withjb k i6)3 ak/cya2ce:zout reference to a particular direct6a)kzeca cj:2/b ky3iion 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 2cw9*( fhjepe(mzi) van average speed of 50 m/s and then completes a second lap at an average speed of 2 c9(z)ie m v(p*fjhwe$V$. 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 mpqpew3rw39r) sljd6(4 xss h * in 1.0 s at the constant velocity. If it continues, how far will ipwd we 3h(ps6x4sqj 3r) 9lr*st 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 that is sliding at 5*7mlg35skoskr:f mg 4.00 m/s to the righm35kofl sg 7rg m:*4kst across a frictionless pond. The boy then 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 4) eomml (a59qm00 km at 80 km/h and 400 km at 100 km/h. What is the averalqm)o5 (9amm ege speed of the motorist 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 tha:adu usp* tj +6r+by.e x-axis. The graph shown below is a plot of the car’s velocity in the x direcy*jbp++ar s:au u6.t dtion, $v_x$ 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 tx a,+vz jnh +f9cm;d/upj9oz1 oy car traveling along the x-axis. The graph shown below is a plot of the car’s velocjp+;19c avz, /jdozmhfun 9+xity 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 refe,i n3 oy* ,rlk(qry*8. mnrroxrs to the motion of a toy car traveling along the x-axis.3kr.mn* qo,i*n,(oy8ryrrl x The graph shown below 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 3d axa25y.omadue south for the winter. Atm 5oaa.axdy2 3 what point did the duck 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 diaah siwjo lt55m9u43y9l kcw d -pos/x0)*xdf9gram 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 )ckt9m909 j pwas53s*/lxdfw 4ylxh- idoo u 5third 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 diagrawls rwfb )e,)5m below which shows the position and elapsed time of a car starting from rest and ur w ,s)lbw5)efniformly 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 the pos.nhqa ,sr a;4b vid6z1ition time graph shown in the diagram ab.hivda 1 rqs4; 6,anzt 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 idea o78dbl7 rbwl*l elastic rubbdw o* bll7r7b8er ball is dropped from a height of about 2 meters, 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 informatiu8sj5socgwyp*rpt91sg2xb.q ),oa . on. An ideal elastic rubber ball is droptop29 g wxpc sa*us)bg8 r1yo .5sj,.qped 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 with a speotxygg 5g2pk2 e8e y9+ed 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 ref8ho zgndf 5:,or.jt g7ers 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 hp,. mjpzlwxhul*8z 3ppt-93refers 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 refers to the following sceb;qor,(syu kp(-)jqul t su 89nario: 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 scenar89zciolzh c6e6aod 07io: 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 tablew ml(gg83xa 9nfo(m)f top and off the table edge. Which of the followingwg (m gxm al83n9ff)o( 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 rel hsym;45*vpg fationship between distance and time for an object that is moving along a straight lineg *vmf ;hy4p5s. 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 repres 7 z6 fwtx-dm8gldf92vz+pqi)ents the relationship between distance and time for an objex7)zdmtw26-pv+g9f 8 qzidf lct that is 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 y uj 6rue8k(zr ))gv*dstraight downward on 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 the obzkgd 8jyu( *ruev)r6) ject 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 representsh,v73yev+ ir)vr hq-v a toy car starting from rest and uniformly accelerating across the floor. The hq v -i)v,+vh73yev rrtime and distance 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 represents ahkewjr9tu+ :xg8j g5prhx35 6 toy car starting from rest and uniformly accelerating across the floor.g53xh: t5 hurek6jgr9p xj +w8 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 car start3ry07dp 9u2t8 oan3 m5iqmaa king from rest and uniformly accelerating across the floor. The time and distance traveled from the ip r0k5autama m2q3y873d9 on 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 accele8h ecq *ie(ao/rating ball. The position of the ball each 8eaec (*/qhi osecond 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 ig8va 2 3kn6ntuniformly accelerating ball. The position of the ball eikg8 van3 n26tach 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 clx fs2 sk;r7wy(own on a unicycle moving in a straight line is shown in the ssk2fx; yw(r 7graph 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 circp4 -f73cussd mksi9xc: ox ;+mus clown on a unicycle moving in a straight line is shown in 7+; c3imdsmpk 4ux:so -sc9xfthe 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 fallscii2zqzy(95un zk1 jf .1btv f4 b,k8h 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 describes the motion of a marble on a table toxy8xmdrl+id 16p5 yv4p for 10 seconds. For which time interval(s) did the marble have a nmd8p1 lvxridy64x y+ 5egative 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 descr:gjm6 tor* -41 eg.eiuu:qcjvh,(ht vibes the motion of a marble on a table top for 10 seconds. For which time interval(s) did the(r4ht:,u.:-q eg 1uvc vjim *tjh6ego 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 j :p4z:)b/ xuc xnozb,motion of a marble on a table top for 10 seconds. What is the marbles axp/juzxzob: :c4,b )nverage 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 uniformuf py8(alp8*ej di;/ lly 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 whmxh-nh 9rir dsr+zb da :0/(6ith 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 f39 oiy2 hplden3r6.qjd n,oh) ollowing graphs could correctly represent the motion of an object moving with a consteoyi6r)nh9 3p, 2hn3djq o. ldant 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 pb7 wya95o2otl- mkmy,h;d m6graph describes the motion of a toy car across the floor for 10 seconds. What is the acceleraok m,-am 9l2pom7; 6 dbyythw5tion 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 des o70/ogqzx9vms6wmev:t: fd j( c *za(cribes the motion of a toy car across the floor for 10 seconds. What was the total displacement of the toy car for the entire 10 s m(o :s6cxvz:7wej/d0vafq(zmo *9 tgecond 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 motiono9: x zpvr6 y;9kc*nbs of a toy car across the floor for 10 seconds. At whatz9v96 xps:kc;roby* n times or time 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 uniforml 3dsqrj5p9u i0y from 0 km/hr to 60 km/hr in 4.50 s. Which one of the following choices best represents the accele0r 93qs5ujd piration 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 shown. Which of the following9skpj6t3 npd2 statements regarding its36k 2dsppjtn9 motion 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 thcvz201v 8sy vhe x-axis according to the velocity versus time curve shown to the right. When does the car c0zvv2 hvs1y8have 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, nh 6er6a qbv+:ay )ufh:+e,aq a tennis ball is moved so that the angle between the velocity and the acceleration of the ball is kept at a constant 120 deyf::6h,aeaqn6b)v u r+ahe +qgree. 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 7re,o6*q1kf gad xy g7,9;rsekxia n. and traveling toward each other.g 6daer kgo7,f q, a7;r9sn*i yke1xx.
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 and incbrc /gb/xe g06i 3hw-breasingxwhceb/ 06gbgbr3-i/

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 v qjp7d,jnvu lfw 7fx q;: sv-u.,8d2rdelocity 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 tm w *clo10y7sxhe following choices identifies quantities that musm*0xlc7s w1yo t 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 movnqsw8+ mxi1(fes $3.0\;m$ 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/gpxs -)uz/w z, $y\;vs\;t$, 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-dimens/ wgird7 )4/ocxp vd fj-39i3toc,cwj xc8r c4ional track for total time T in twxjoc igx/ fr vc ,ip/ 833dw-cc4d7j cwr94t)oo 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 iuog /a3.*i(zmv gfz0 the motion of a car on a straight track is shown in the diagram. The thick line represents the velocity. Assu*o .0fii mg3z/v gaz(ume 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 mo w q/6smk/,yyh9ujhh ;tion of a car on a straight track is shown in the diagramhwhh//k ,9qs;y jyum6. 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 t 6w 5tk)ywmt:motion of an object given by the position vs. time graph showtt km:)5w6t ywn. For what time(s) 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 gi1n--f o arbw/tven by the velocity vs. time graph shown. For which time(s) is the acceleration of the objatwnf o1/--r bect 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 under6taw;mblu:yr (j,qm5 the acceleration vs. time graph for a fixed time interval of an obw5m; tqb:my6uj a(,lrject’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 horizontal line with increasing speede5zqk cco952-1ng5 we nd*;kmf m2vmj .
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-70iygjnd(r)h)e izpd ca j3,c-jlv / in 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 mmi mcb)k y)qm,mk19 (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 isu 0: )vme*(mg6tnevb )r qgu+f released from rest and reaches 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 moving along a horizoncqbp bu:8t8, z0r t+oktal axis is shown. What is the total distance traveled by the partibu 0ztq, 8pc rok8:t+bcle 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 9 9/hjk*6xk6iau e tznchoices correctly identifies all of the listed s/jka9int k6x9zhue 6* ituations 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 line is show/z,y:wv6 oar8xri;o8 k*a csnn. The object starts from rest at time t=0 s. At what time(s) does the object attain a maximum dispzas ck/r x, n6rv* iao88w:o;ylacement 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 line vs. time is a;5lue 16+ byy :cgmx-v) ozrugraphed. Which one of the following choices best gives the proper interval(s) of time for which thee1 uylyvg-6) ;romacz bx:5 +u 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 th4o7c*3jdc lp-/(5xwnbd asi5 xm6a bg e right on a horizontal track, each with constant acceleration. At an instant of time, the information about the cars is shoccbg lsd/n5m* j-5pbd 4w6axo xi(a7 3wn:
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 ez zrdi)j)w3b,s62yxo+ ,ip w $x$, 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 u9 om-cx9;hmd graph, which one of the following choices correctly describes the relationship between the average speem9-9dxoh ;cumd 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 g+q4 f-zdv2x9q hzwc,following choices best describes the instants of time, at which the car and truck tz4f9 qchx2qwgz+v ,d-ravel 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 r6s87 hbw708lpje cf8hizs9 qat the origin and will move along the x-axis. The acceleration vs. time graph for each car is shown. Which one of the following choices correctly identifies the relationship fb e6il8qhpsw9j7z 8h7 08rcfsor 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 ip +r 6; aao8g8nmjn-u3 iwd :07cikbjgraph of an object moving on a horizontal line is shown. At what time(s) is tnuc -j:0r8 7ogbi iik jam8dpw3n;+a 6he 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-axis following the position vs. time graph provx,yeo8ak,0egg wvy9q3)vhtc a:d (8e ided. During what time interval(s) does the mass ha q,0 89e h83xgecaevy:td(aoy )wvg k,ve 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 13:37 , Processed in 0.436419 second(s), 165 queries , Redis On.