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 cir8j ; -rzje l-,zzk1fcut7gt) ocular 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 an4 w:xjtr5 zn;il(8c s particular directi(cnxj n8;izs:t 5l 4rwon 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 an average khguc k3 8up45/bx2 dlspeed of 50 lk/pux5 4 c23ugdbk8hm/s and then completes a second lap 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 in 1.0 s at the constant velocity 9h vmd,r-nf;davw)uj85 ves 8. If it continues, how far will j,efv8w8-da vs 5h ;rn)dvm9uit 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 5.00 m/s tid 2c5;ryzzxj.4 n c+so the right across a frictionless pond. The boy thens 4+cz nz2jr.5 ;dixcy 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 400 km at 80 km/h and 400 km atg9 6ncc1from,r+p *fk e+sxo: 100 km/h. What is the average speed of the motp9efmc frk:6gs1 *o+n c+ oxr,orist 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 ;k -*dfw dl1d4obwqxrj)81f oalong the x-axis. The graph shown below is a plot of the car’s velocity in the x diq o4-k lowxjdr)1d1*d 8b f;wfrection, $v_x$ 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 ref+do5ht o9npe +ers to the motion of a toy car traveling along the x-axis. The graph +tpo5n+ehd9oshown below is 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 :vye:hg y2 +vatraveling along the x-axis. The graph shown below is a plot of the car’s velocity in the x direg:2ay: v e+vhyction, $v_x$ 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 fly n v2y6mc)4q91nq pujking due south for the winter. At what point did tyq9c )m 2ku6v 1jqnnp4he 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 diagr*x 7pj;gtjnkhh dsnxkpd)97 7+ tu+x3am 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 second? k7dph x7+gu7d3j tnp nxhxt) *j;+9sk


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 diagrb;)o)xni1klf;uhg. xq td3g5am below which shows the position and elapsed time of a car starting from res h )dt ;3oi gx15.x)ugqlf;knbt 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 /v:tb4f)z ,j3wm5mjj q d;vrj object with the position time graph sho5bdqv 3/jf4;)jrt:mmv ,wjj zwn 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 questiongs(p*ty, vzds 0.r5z2uai7ea refer to the following information. An ideal elastic ruassu a e7,ipgt 0zz( v2r.dy5*bber 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 information. An ideal el9wut-tvhmasmxgsyr 3l 15-s1s f --/j astic rubber ball is dropped from a height of about 2 meters, hits the floor and reboujxsry t-fs/3 v9tam -hm-sl 5w-g1su1nds 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 speed of 06(hnisd*/ j47yql1 pbfaz hrpb-2tz$v$ 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 ff 8k6e 92tcdkpote2i/ ollowing 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 ref8 /,m cgwci),a pqercw4k.pt. ers 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 tlx4a +icp, .rmn -ns8to 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 the followi*s+zh1r /p kfzng 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 and9;uj(oo/3sql(:dgaozxk 1,svjcc* d off the table edge. Which of the following would best represent a graph of the magnitude of th:3g ; l*1(q cxk(dosjzu odvaj /,9scoe 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 betp,qm im.5 hnm0ween distance and time for an object that is moving along a straight line. What is t5mm nh,i.0 pmqhe 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 timeq7axys s 9ktp :03 -cn7ieoq(a for an object that is movi(ye73c0 qkp7 xsni9-tqaa: osng 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 strageul ak1 g+zb3+: -ixysr* wc0ight downward on Earth with an initial speed of 12.0 m/s from a po* e-1x +3: c0bzysugra+w gkilsition 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 xu6houd3ci()l )ekv j2iq3x/rest and uniformly accelerating across the floor. The time and distance traviq u)e(kxv 3j h3uc6 ldx)o2i/eled 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 represqo( jrnds(7 10zt+id-- shguc ents a toy car starting from rest and uniformly accelerating across the floor. The time and distance traveled from the start are shown 0r-i(s tdoc1zj(d +7gunqs-h 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 starting from rest a sc8:9jai)(1p qan ajond uniformly accelerating across the floor. The time and distance traveled fr81 )ais:ojq apna(9c jom 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 position o8. z+r lhyb8j,, brevtf the ball each second is indica 8tr ,b+ly8,rjebh.zvted.
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 b* f1ldmxr.g7w all each second ir1wxm l7*g f.ds 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 md 1vv37d j)r .3dwbqevoving in a straight line is shown in the rdqbv. de3w7)vvj d13 graph 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 f:8b6lqqd4 ,t :zekd4 cbk -rna unicycle moving in a straight line is sh nld6t,f b bek:dq:48zcrk4-qown 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 vacuurrtwwx +:t+;a*s f v)cm 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 tabl 6icx-ucdvnx 8)i k(7ve top for 10 seconds. For which time interval(s) did the marble have a nxuk dvxn 7vc(i)c8-i6 egative 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 accompanyi*l 5mgo- zg32rvg 4auj0tw :meng graph describes the motion of a marble on a table top for 10 seconds. For which time interval(s) did the marble have a positive r2g gmv*wl ot3azeg5u0jm-4 : 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 motiomy;5c t.j)kqfu bf2)bn of a marble on a table top for 10 seconds. What is the marbles average acc5)qf yt.;uckbfbm) 2j eleration 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 un :jv/ nem;ykt/iformly 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 straig4 ca;tb*2cgsn ht 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 f4113rdqxqhm7)hzj ad ollowing graphs could correctly represent the motion of an objec da rh)1743qjz 1qhmxdt moving with a constant 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 motion of a toy car across the n8wv/8sh z(fffloor for 10 seconds. What is the acceleration of the toy car at fv nz8hf8(/wst = 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 apdeqlt) mog 3o ghv02, :trptzw(p;)1cross the floor for 10 seconds. What was the total displacement of the toy car for the entire 10 second interval shown? ow;gp0rphe2t dtv1:lzg3,m)p o( t)q


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- jog mi1x3ip4 graph describes the motion of a toy car across the floor for 10 seconds. At what times or time intj oi-xg1 pm3i4ervals 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 r sibmh)rt4 z/ 37 ne+(yvu:sdin 4.50 s. Which one of the following choices best represents the acceleration onzyr3i4v/(hs umt :er bs7 +)df 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. Wd8spl m/i9 i8c:*wxu(rd0 wxmhich of the following stau0xpwwi/ (88s: ldmdmx*9 ric tements regarding its 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 the x-axis according to the velocity versus time ,)u goe6 fh9oibw vl,6curve shown to the ri e9gvuo,6h f 6)oi,wblght. 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 bal5e sanok2b6k(l 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 5bns26 koa(e ktennis 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 apartnp :oplwc* 3w3x5as7y and traveling toward each other. px5cp*sl33w:ow7n y a
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. v ;z+*9kjijtt1iqb4j When the acceleration is positive and increasing+ kj1tjz 4 v*;9biqitj

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 averagt3k hk:(t bq 1yg6ufi ll)j3 u6ou8j4de 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 dimensionsk*5 ci4vc17l(3 lj2l*geoie6o 2 i mbofx1lcy, which one of the following choices identifies quantities that must ha xlc2o1e4ijc bi5 g63 vi*ellk7yolfc1 m2*( ove 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 xpyler /y( ,ef*6pz 22 atju7uvus*r-$3.0\;m$ 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 opt g3suij cp))9:,bkdardhx 1q+ f)7ime, $y\;vs\;t$, 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 T2.s2l-k x7 qqtcxt aj1f;l j:d in two parfakx q qt:dxl21 tljc.2;sj 7-ts.
• 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 track i(8mnlcmf v:yh*;oix, j -pt9p s shown in the diagram. The thick line represents the velocim otp;j-l*yxf:m n,c(p98h ivty. 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 fv1-em0xcm: q.u ezl) nn 2o;:uko+tzon a straight track is shown in the diagram. The thick line o-+e)l ;no.:0 k2uvcf1 zumq : eztmxnrepresents 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 ofu(af; xvb *gm4 an object given by the position vs. time graph shown. For what time gx ma*(;v4ubf(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 given by the velocity vs. time gurx2p ywh0i:k78 sr1v raph shown. For which time(s) is the acceleration of the object equal tor :k107uypsri xhv28w 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 forv 8tz(mx bvat8qxr-*nw)8 afvt 9;z0w a fixed time interval oafqan80 bz9tv- tw ;8vm) *tx(wx8rvz f 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 yerl pmd on84d/f;o12a 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 ot51 zrvll; y0two 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 r r qss,kce13.bqtw 7r,8 gr7jdp+mfi* eleased 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 reachmi uv-x r/*1yfes 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 alo hhv4t8-t9c+a: -xi 4 pim/kup,wynmqng a horizontal axis is shown. What is the total distance traveled by the partic vmut x ktaq-pw:hh -89n,c/ip44ym+ile 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 choices correctly identifies all of the lis 0bo;zu11bz :sdb2s rz3wcmh+ ted situations for which there is a nonbo+;zcs0w:3 zz 2 u11mrdbsb h-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 lineyz97:l9 w.i6,cde,t1rn rbt (zo eyso is shown. The object starts from rest at time t=0 s.9(sl 1cty:d6nzioyw 9rb z r.t,,7e eo 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 otq3+f1mu ).f3vlr l0,nimwiu rigin and its velocity along a line vs. time is graphed. Which one of the following choic mi,3)3uqinlw uvftr.10 +mf les 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 j (l8-5*k8hhjsa qojrthe right on a horizontal track, each with constant accele85orja -q8hslj kjh *(ration. 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 1 v1zd j c2fmi0x+j8tf7ee(mea 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 showwbq f4sg+5wwh* qe695m u*gc p 1cxm44 xhg;ntn in the graph, which one of the following choices correctly describes the relation9uh *tpmce41g g*;m xwxqfws4 b+5hwc g5q46 nship 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 chzh4oss + 1fq0aoices best describes the instants of time, at which the car and truckssoa+4 fq0z1 h 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 rest at the origin and will m/.a5vo s ip1mnove along the x-axis. The acceleration vs. time graph for each car is shown. Wh. 1op nvmi/5saich 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 o5m +-df i76qj paxcuy ur,qg/6f an object moving on a horizontal line is shown. At what time(s) is the object 6q- pdum5c, uagfi+q jryx/67moving 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 aloblxxuh *3: ed xrd6ji-( o3yd+ng the x-axis following the position vs. time graph provide- j3y r:eh(d d uxdlix6o+*3xbd. During what time 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, 2025-9-19 06:30 , Processed in 0.578825 second(s), 166 queries , Redis On.