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 cojs;/hl a dxlu- ,1rt8;,uzrc )cb(qg nnstant 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 dik -tjyhczt5/,stance per unit time without reference to a particular dir,t-t /yc5j hkzection 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 averagdhwflp n w /9 ng4;b s(;;pzo)uj)ya(; 3gvtqee speed of 50 m/sd;()o ) (3 w;p4g;wfq gj/aupz lbt9hsnnyv;e 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 0c*5j, 7tf*wxj ,mdxao2z--; tzefpoo4v j/ v n.80 m in 1.0 s at the constant velocity. If it continuest-,jmcz*x jo- 7pvowze 2*ndjfx ato/45f,;v , how 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 planki7jua u(y-hf-)ai x8 kd .mb5h that is sliding at 5.00 m/s to the right across a frictionless pond.au7m- fdiji b-ka5uh(x.)y 8h 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 400 km at 80 km/h and 400 km at v +bw/hhy7bl;qy0e;t 100 km/h. What is the average speed of the motorist on t/wb; +t evl hh70;yqbyhis 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 referzn,qc0/lht3l oz z2 l*s to the motion of a toy car traveling along the x-axis. The graph 3t cz,hnz 0*q/lzllo2shown below is a plot of the car’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 motion of a toy car traveling along zim2u 8yxr3;m the x-axis. The graph shown below is a plot of the car’s velocity in the x direi yu32;8rmxz mction, $v_x$ 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 )tzmf;/zt r9d+m 8w.,kid pigx-axis. The graph shown below is a plot of the car’s velocity in th9,+pzif /m.kg ;dw t)ridm8 zte 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 ofkjn fdwi6(k:3 the velocity vs. time of a duck flying due south for the winter. At what point did the duck stop its forw(d3:ji6fnk wk ard 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 diagram below which ssza0 5t(equx 7y-c,yne dk 24chows the position and elapsed time of a car starting from rest and uniformly accelerating in a straightc 0x ke4sdat ,n27y-euqc5z(y 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 refer to the diagram below whic+qv .;b0vdrdh xkbf:8czl h kb:svq;2;4 - lnlh shows the position and elapsed time of a car startin dh bxqkv ;n8b;2k0 flsh-+ qv::;dlrbvl.zc 4g 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 velocitykb *z1 7e /kcgpme6:mmd u)m0t time graph for an object with the positicum0m *k k)p:7edmz6m 1g/ebton time graph 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 folloapvy-z 0cu 18hwing information. An ideal elastic rubber ball is dropped fr1ch-p08z vauyom 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 th.whq(,3 yqgdj bie/j r ye1q(+j6trs -e following information. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor and reboundsq rth,b(6.rwde1i/ qejy3 -+ygsjq(j 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 win,.mj1 jd8qclth 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 thnl;gq x2 qmnzj /tq 1ww33i7i5e 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 the followi ato1xcbx; s7jyt43bgee 7u6+ng 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 hn2xxgt7 , :pwto 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 ref,mdoy)-w g gx*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.
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 ow 7b+omls 6l48fr2b8z6rt wi qff the table edge. Which of the following would best rel826wrbqbr4+sz 67wmotl8 fi present 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 relationship between distance and rc+kkqj kr3j1f -wn4 ;time for an object thj4 3k1cjkqn;-+wrfk rat 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 between distance and time forb+z* s;2 o2ygqxkt 0bq an object that is moving along a straight line. Between what timesqqytxk;2+ z 2s0*bbog 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 ciy58cuiwus w -i ikqb0b)8/0with an initial speed of 12.0 m/s from a position 10.0 m above the ground. Ignoring aiiwy85uiwk)-bq 08i0/csc b uir 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 rest and uniformly 17 jnw/w9ih .f:px reaaccelerating across the flifp/ e1 9:wn7.hawjxroor. The time 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 a toy car starting from rest and uniformly ainy+hq1qxl: 7 ccelerating across the fyqhx :qin+l17loor. 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 repr sngo,bpri (wf4u1 c)s g-:8eresents a toy car starting from rest and uniformly accelerating across the floor. The tn,81sge:i wg-poru bcsr)( f4ime 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 acceleratingb2b -bcosb* q/wl4-xk ball. The position of the ball ea4x/s-k* b qbbwo bl-c2ch second 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 uniformly accelerating bapth;i shzu-n m m-cmod):,u44ll. The position of the ball ea),ho4-- 4dt ;su: cip nhmummzch 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 clowra2+ep r6e,zkn on a unicycle moving in a straight line is shown in the graph belorze+2 a,pkr e6w.
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 straigh5.x:umm 5ybclt line is shown in the graph below.u5 5xb :ycl.mm
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 vacuut: f sp+yjcb51m 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 tok s ufmyx)-ukms+:83zp for 10 seconds. For which time interval(s) did the marble have yf +8kzmk -m)sus3:uxa 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 motion of a marble on a table top8 rj+a5y)dkb x for 10 seconds. For which time interval(s) did the marble have 5j d+ax8)k yrba 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 motionkqysx8ws/9n3p mx:+x of a marble on a table top for 10 seconds. What is the marbles pn/ m :9qk+yxsx3x8swaverage 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 uniformly from rest for a j3a 15 -z)hefeqf0bd ktime 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 downworjnof. 2sq0 cm8+r4;;pa1kc9m s )i ji o3oojard 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 coj 3::bbq:t:chdjg j g;tu0em0;egl1g rrectly represent the motion of an object moving with a constant speedt:d tg:3jee; gcmlj ;:gjbh:01ug 0b q 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 thepirk;s ux)8l: kgarx3rp-; oa l14qq enp7/z, motion of a toy car across the floor for 10 seconds. What is the acceu /;r7-al r4k s:; 1ke ,xqpg)oqazin38lprxpleration 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 descbe l 71+p hlvl nx+a+/:orcrj+ribes 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 second interval shown?+ha+ 7/ l cr+ejlx1oblr+pv n:


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 accompanyi.,i 5h7c:mbb 8t fy8f)asu+djcdn+ d jdfy2o :ng graph describes the motion of a toy car across the floor for 10 seconds.. 8d,d)ijdj7c:os:+f52dtyan8 f mu by h+bfc At what 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 uniflibq zmv;0d z-y2b,+dormly from 0 km/hr to 60 km/hr in 4.50 s. Which one of the following choices best rep ldz2y-bm,b v i;qd+0zresents 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 thehyj; d81dt x)o velocity versus time curve shown. Which of the following statements regardingt x;hd8)j o1dy 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 vers:s aysed9c5cf(vca)34 ; orf(vilm 5rus time curve shown to the right. When does the car have zero acceleration? si ;l39asodc)rc5r vv(4cf(femay 5:


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 thlo; d(o5nax)/om 4s,dojl.gve 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 dmj an/5x)o; ls.oovg 4lo,(dis 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 traveling toward eachry4 d4: 5bmstzif).ik /s (tgv other.t/5sysfi :.4 vzd b(4migr)tk
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-axik(5)xjki5l sys. When the acceleration is positive and increaxlk)j yis(5k5sing

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 okk vcxh-p4: f8wnh- 4of 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 dimension,f3hjy6 ki /1ak0bn wos, which one of the following choices identifies quantities that must have the,f hk 6 y/oi3bnwk0aj1 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 movejxefj jf:-j0) -wdbumtx*2*m s $3.0\;m$ 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-u.t-axpt *)ofkjn 7,xtime, $y\;vs\;t$, 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-dimen. 3ekt d,j-u mgaiii66sional track for total time T in two 6j kumid.e3ia ,ti-6g 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 straigff4c.m4bcqlo9 (j i(1b og+bfht track is shown in the diagram. The thick line represents the velocity. Assume that the c(44(cfbb .m1qc+ f jfoo ibg9lar 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.qx6o6frmkj. 0ox* z*x time graph for the motion of a car on a straight track is shown in the diagram. The thick lifk *6xoj*rxm x zo06.qne 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 motiykj /b b3 ,69dyvtsgw8on of an object given by the position vs. time graph shown. For what time(s) is9bsyk d6 yvtb3/g8j,w 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 gd0f c4vidm h,2raph shown. 4hc,2mfv0 d idFor 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 acfvni2 .wk-jvg+u0vh .celeration vs. time graph for a fixed time interval of an object’s motion, what quantity has been determg0f.h iu-2 j+nvwvk .vined 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 increasingfqrjt) xof m0u,n-y sp;u0h+2,spv-l 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 twdq 27kb8 zuqyhh 4/ei8o 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). ujqwjt,k /fi .nx 8)mrzk-aef.w*ded 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 5c:lde9c k,b.aw 0*m7* 3 x9chmzpbjdea7xxw 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. ujh.6eux k. kokl:hx *fm,,d0time graph of a particle moving along a horizontal axis is shown. What is the total distance traveled bk6.0h hok .:k,d*, xmjxuulef y 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 cmt e14zevj 39d4 mu4j* o(dzgjhoices correctly identifies all of the listed situations for which there is a njot43 4(demdv e1z*jmu9z g4jon-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. tip( ;fqx(/kpdxy*iahj24 gej++ wxqd .me graph for an object 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 maximum displacyk/+d(x e j 2.(x+d*qgih;a pq 4fxwjpement 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 fuqpya e-sgcl tza:,( jow .-,666c 4wffdgr8 the origin and its 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 moving away from the origin? e6ca:- y ( f-gq ,cg,wd6fp4atr.fu6olwz s8j


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 e (v;8hiqi zg3to the right on a horizontal track, each with constant acceleration. At an instant of time, the ig8z3vi qeh;(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 hase3vh dr(,4wwl 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, which one of the followi)m9f6 l:kswlnng choices correctly desc)wknlm9s :6flribes 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 choices best describes the iist49i9* fpp gnstants of time, at which the car and s* 9igp9f4t iptruck 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 move alonvp 0q ;h3 9rx+*rysz/bfw y +hrgv+9png the x-axis. The acceleration vs. time graph for each car is shown. Which one of the following choices correctly identifies the relationship for both the s/rsrghv+h b pvn;yw y3* x++90qz pr9fpeeds $v$ 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 horizontanqu8a y49 ,n z11sajgml line is shown. At what time(s) is thunq ,as9m8 jz411g ayne 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.y0i1 * f-zrkvu time graph provided. During what time interval(skr10vzf*u- y i) does the mass have zero acceleration?


参考答案:    

  • 答题人:
  • 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, 2024-10-6 21:09 , Processed in 0.456672 second(s), 165 queries , Redis On.