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 spebr, /.4dzf uvieg6olf+w b+i8 ed 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 withoutt7db3my 3 y6f6i tt3kpxyxb9 1 reference to a particular directif t myy693b3xb7 yt6xtpd1k3ion 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 s ,61 zg1 b8n-dw6 epzg af2iw0e4uiahtpeed of 50 m/s 6 te1h w-6g i1ed uz4wa0fgznib2,p8aand 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 velor v/j8lkoi ww ba93.9ycity. If it continues, how far will 9 wrvoiaw/ jl3k.y8b9it 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 st4kq0)7x knz voensn +2ationary on a 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 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 q2v 7n)nk0x 4zk+neso 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 k(20/yiwgjxy.ft mrxv t./vk*m/h and 400 km at 100 km/h. What is the averkjxy .f.ym/( vt 02*/xwgit vrage 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 the x-axi(-;v sfed9a4f9j 95agzbg* gwutjus* s. The9aj ggzf ( 4wudj;b s*9utg 5*f-s9eva graph shown 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 refe77rscvhz 2x-ers to the motion of a toy car traveling along the x-axis. Thc7vx-7zs h er2e graph shown 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 refer 1efa *ut0jsa i8aerl tfya*,7/w1 52nfgirg1s to the motion of a toy car traveling along the x-axis. The graph shown below is a plot of the car’s velocity in the x 112wraiia0f gly*5 8uaef,jsfnagt 7 rt *1/edirection, $v_x$ 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 velo6hb:u6 y;cu1pkzk l3lcity vs. time of a duck flying due south for the winter. At what point did the duck stop its forw6:k3u6kc lb;pluy1z h 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 ; d-wt2flh sf(i4s n*--4 lco ,hiesanwhich shows the position and elapsed time of a car starting from rest and uniformly ac i*l,-(-es f2a;c4n4 idh holfssn- twcelerating 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 refer to the diagram below whi-p /q1;d6 rkwjmv c(lhch shows the position and elapsed time of a car starting from rest and uniformly acceleqv1-hwkr p(l/md 6;j crating 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 dt+ /ux +umpi-ooe2s8 time graph for an object with the positixpmd- ts8 +o 2+euu/oion 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 following informyr8jbv9f 24hx ation. An ideal elast9x2vfy4 rjhb8ic rubber 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 follovb3 i 8h70cez0yxn m,twing information. An ideal elastic rubber ball i ,x7n0v0 3bm eithy8czs dropped 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 spe;;sx yvd uy-94g+ kej)j9ssszed 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 followae kqn t9,)m+0rui62tabmpv+vy6fd 5 ing 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 followil qj9ce6c * ) 9ecrz(9jijo0jy u-twufb*/g9gng 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 scenari q2bhx**dypg0 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.
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 scenar08u6: zjz/j ijhi6gcuio: 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 aqq f, dk3b yc)- b28z;-ppecup horizontal table top and off the table edge. Which of the following would best represent a graph of the magnitude of the ball'q-q28p f;b c kpy-)c,zbdeup3s 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 an4z0x. ntgxb-ns+:s6wtwjw :se ze6q .bmv7z:d time for an object that is:qbx: zengmw - 6w:zssw6jt4 +0.tvbxse n.z7 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 bet laatn48 mv; od*3krw8l bbfl5v*nc(2ween distance and time for an object that is moving along a straight line. Between what times did the object have a non-zeladf 8*l3a( c5t*kob;ln8rv4v w bm2nro 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 cqa+epwo ,4l:pqi*f2 is thrown straight downward on Earth with an initial speed of 12.0 m/ efol+qpaw4 2,pi:*qcs from a position 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 staek9 gj;/v5 pp50viqftrting from rest and uniformly accelerat vtfp 5j;g/9i0e 5vpqking across the floor. 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 w3vd hz8ywlb +9cu.(k car starting from rest and uniformly accelerating across the floor. The time and distancekv ulb89zwc .(ydh +w3 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 starting from rest 6l3s y*.4 bdw5woaqyband uniformly accelerating across t6qs3 b y* wd5lyb4wo.ahe 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 accel--, ve7lepx0 ,l xfdyg+ npjtt(*e:px erating ball. The position of the ball each second is indicated. 0getent vp+,lp7xxxd-(j,e: *- fp yl
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 bdv u7dbss(jp:8en/( position of the ball each d(7dvb en(jb pu 8ss/: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 clown on a unicycle moving in a *qdub+q;qv1,z n ;9lkzqx 8ump4 b,lustraight line is shown in the graph ,*uq ql l u1b9,n;z; q+bud8qxz4p mkvbelow.
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 id4ft6/ w*k,hf9e mbyqs ozo ;0eg) i1line is shown in the )ef4sk/9ftg,*izqw 0 y m1do;oih6b egraph 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 vacuum near the surface of the e;8ibt*o l.lv+- t.j jwi)kfon arth

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 az/ueu4j5kl ps2lk)/ h m) hxe/ table top for 10 seconds. For which time interval(s) did the)xme5/ulh /2lhu k /s epk)j4z 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 motion of a marbfi (y2ec4rw0ke* ;jex le on a table top for 10 seconds. Fo2i*refjy ; e4(cx0kewr 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 mo;s.)r0 b9(wdtl cwozarble on a table top for 10 seconds. What is the marbles average acceleration between t = 3.3 s and t ob9szt; .lw(rd0 co)w = 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 f;* 6ik7b jwf3:whldjhrom 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, thrp5/e32 (sq3i- b. yonguca dncwkvi1) own straight 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 folzv(v-b e zjn 5fm5l3(qtuw 90alowing graphs could correctly represent the motion of an object moving with a constau vl (zmzeaw -jf3qn t(955vb0nt 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 dek 5l0z1w. sk :x0i7gqzqj k4qnscribes the motion of a toy car across the floor forq7w kz14knqszkj 0 . xi5l:gq0 10 seconds. What is the acceleration 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 toy car across thefzbxm4 8km;1/uf n7cz floor for 10 s14z78 m ;kmfz bxfnuc/econds. What was the total displacement 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 des..n uq+ys(z:vwz g lyao3wx 7;cribes the motion of a toy car across the floor for 10 seconds. A;zwxvo+(: ug7w.yzn3la qy .st 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 uniformly from 0 km/hr to 60 km/hr in 4.50 s. Which onr5n-ahzfg 7xbeyz :qn n. 3-g5e of the following choices best r5nn.h bz5 yg g3afxz--:eq 7nrepresents 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 shown. Which k2jswk+ h p* bz:)zfltc9;dg:of the following statements regarc z*b2dgt+::lsjwzf k ;9k ph)ding 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 thrtgxj wy7ac5(lac2+g: z d:o(e x-axis according to the velocity versus time curve s2zlt:y5ro x+gjag7(( :ccdw ahown 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 mb 6p;ykz(b,z )),n .euh 8cytb,ao nyso that the angle between the velocity and the acceleration of the ball is kept at a ;.8 nm,ybkbye( zybhtn6ou paz , ,))cconstant 120 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 kilometeh6n.t)sboq k4 rs apart and traveling toward each other.n)6.b 4h kotsq
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-a3u8tk/bs;tmx/n ol 1-yswd v 0xis. When the acceleration is positive and increaskn0 8/vuy wb;3tt/d m l1x-ossing

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 ofzm4w;5ird ij( ke20hc 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 d +u)qcoszq1(f imensions, which one of the following choices identifies quantities that must have fz(o+s)q 1ucq 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 cy2xolo) or40; ej vi*$3.0\;m$ 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- f0n m7(hwnyt ayp:2:ntime, $y\;vs\;t$, 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 tisp8s p+-1mhl+ amtx5g me T in two parts.81pxm5lsth+pasg-m +
• 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 wx l(4v5l 1hybon a straight track is shown in the diagram. The thick line represents the velocity. Assume that thel bh yvw45x(l1 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 gr pop3s0 :u n9k;acm6y ipt:e4japh for the motion of a car on a straight track is shown in the diagram. The thick line represents the velocity. Assume that the car starts at ;np9y:jut p3 ai:pes kco6m40origin $x=0$. 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 positionx- ; z *kl)ai8br;mxnp vs. time graph shown. For what time(s) is the spenmxkx-;p8;r)* alibz ed 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 objoez c96l 3*i urwgb w fxa6k0i.di20z2ect given by the velocity vs. time graph shown. For which time(s) is the acceleration ofbe 0o06 la*. zi xz2wf2cw u6i9kd3igr 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. time graph for a fixe 9v(nr+ .+ykyz6x2 odhfy ,byad time interval oh(6y.++fkbnozya9d,2 ryxyv 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 a horizontal line with increasing sp4x vx15q qma2 :lk:q7k k:vgdkeed.
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 pcf cfpoe w),-uk)vg94 arts:
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 relextz:h:z/l2k8c b* wp e*ub; ivased 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 r4 aaga9:q-57l zum ;/kd bjyl wfe;y,uest 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 alongjsmwumf4 8m,7;s7a7 cu v-yva a horizontal axis is shown. What is the total distance tr;4 - j7u cs8usma7vmvw,7yfmaaveled 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 cho2*kj qxu;qdb *ices correctly identifies all of the listed situations for which there is a non-zero acceleration*d u*xqq2jk ;b?
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 movin9,lw9-ed ipyzs.k(ay+-sg n ixy40 stg 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 displacement from.s,l etkzs-x+ i(wg-ndy pys9ia49 y0 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 a y)ez2mb/.r8ed,de/r d bcj 8yt the origin and its velocity along a line vs. time is graphed. Which one of the following choices best gives the proper intervaly).zdrm2re e8ed j y,bd /8bc/(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 m ubxe-dhk(,u v/t2 gx:oving to the right on a horizontal track, each with constant acceleration. At an instant of time, thbt( khveugd,:2- x/x ue 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 a position0,wjqkbxa -s) $x$, 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 following choicemo0og 4uw-26m,t umsms correctly describes the relationship between the average speed -u6o2 0mtwm mg4m ,uosof 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 i ow46bk . d-m,/mjfmjdescribes the instants of time, at whic jdmw6if-o,k/b. mj m4h the car and truck 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, each8 *czjl 89m 31 onme) nevmj2yygle)7q start from rest at 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 for b2* 78n ojeml89l3me czgy)qmvj y1ne)oth 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 omk7h w9t/1fg (jpb-h ibject moving on a horizontal line is shown. At what time(s) is gwtph k-7j(f/ 9mbh 1ithe 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 grlk3y 1 jv v8y-c;jm:q/x+bjffaph provided. During what time interval(s) does the masj ;l/:y-x1f+fmbc jkqy 83j vvs 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, 2025-12-10 18:25 , Processed in 0.411827 second(s), 165 queries , Redis On.