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 constami to66)tmqj0,dy 1umnt 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 without reference to a particuw7+w4hdik t ryc6w3-kun47djlar dirdtd w+6jiuwkk 3wy7-ncr74 h 4ection 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 on 0xkt)cft-sv:ls,xb b 1r1.r fe lap around a circular track at an average speed of 50 m/s and then completes a second lap at an average speed o -fsk)r1r c,b.bx0t:svx1f ltf $V$. 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.u*ai d. hrxusvetzs8-clk 8 t+e5 -9b880 m in 1.0 s at the constant velocity. If it continues, how far will a.i e89 * xuh5- rt+zusev8bktc8-d lsit 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.c/795 krq igyzubanp 9es x.8500 m/s to the right across a frictionless pond. The boy then turns and starts walkin9 58ne5bygcps/u79 kz .xqai rg 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 kk:. 2xwc gh;arm/h and 400 km at 100 km/h. What is the average speed ofhrwx.gk:a c ;2 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 0d+zh6*s fsdwx1:p zvpny37o of a toy car traveling along the x-axis. The graph shown below is a plot of the car’s velocity in the x dzhs01 znxp +6d vw sf7op*:y3direction, $v_x$ 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 tzn: )kx 7wbb*3srv sp/oy car traveling along the x-axis. The graph shown below is a plot of the car’s velocity in *zsknsrxpb 7) /3v:bw 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 tm;wx/k joiw*1c xm8u: raveling along the x-axis. The graph shown below is a plot of the car’s vku;moj8 /xxwwmc*1:i elocity 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 /cujqi7x-/e 91hvmp hf*:mvo of a duck flying due south for the winter. At what point did th 7 x9hmv v f/q:ipj*/ec-oh1ume 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 diagram below which shovvxw*:2sx +akyyy rcc0b y;, 1ws the position and elapsed time of a car startinbycsxrv*ywvky a +y x,1: 20c;g 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 refer to thw*e tu4b.a 68dm z jldbx9*bp.e diagram below which shows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight 4l8peaum9bz* 6td bjb..*wxd 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 ofewgt 6h*.)dutp0 :qyl7an;x n the velocity time graph for an object with the position time graph shown in the qlnw; )tu x*g :h0pynd.7ate6diagram 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 infort30+ (un0p7 bqnbdcmwrin *. mmation. An ideal elastic rubber ball is dropped from a height of aboutm wc73nqrditb 0 n nm*b(+.0pu 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 y /kb52,6 j eaikrqdc*elastic rubber ball is dropped from a height ofyce,j2 drq k6ik*/5ab 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 eg,h oi.rltfx+*n23d 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 scenario:w:e /.ryyeveq1a k; c; 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 following sce.ahcr :c5a*ydl/,at cnario: 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 ref)qu8 0 hr:vah*p1hmdn 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.
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 scenaruu dws3439 (u vlau cyh; qrkl;3dm3.jio: 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 r:*unx6s okqs,olls down a ramp, across a horizontal table top and off the table edge. Which of the following would best represent a graph of the magnitude of the ball's acceleration k,uqss6:* nox 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 distanceabz+c 8kv0 o,q and time for an object that is moving along a straight line. What is the instantaneous speed of the object at t = 5.0 secondqk,b0v8 + zaocs?


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 relati 7kg/-d rvgad6z d45cvonship between distance and time for an object that is moving along a straight line. Between what times did the object have a non-zero accelerativ7dkz5 -6 gcrvda4dg/on?


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 with an initial sc pob /ggq 2hje6j5p.6peed of 12.0 m/s from a position 10.0 m aboveh6 gqj co2/j5bpp6.eg 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 rest and un7r yviggik+vwt/ g rtqn:+4074oj5 t ziformly accelerating across the floor. The time and distance traveled from the start are i5 yvt:okrwt74i0 /4++rntgg 7 zvgjqshown 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 belo-tc s z47/wq2jjg1 4liy* sqkvw represents a toy car starting from rest and uniformly accelerating across the -j1/ tqk7cs qgjzislw 4*2 y4vfloor. 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 bh bnrtv 04c89yelow represents a toy car starting from rest and uniformly accelerating across the floor. The time and distance traveled from the startcbtn4h y98 r0v 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 of the ball zq6e:/ma,vc wo0ix.s each sex.waio:e6/,z m0vcqs cond 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 ball. The position of the balzg8zhjgcmv b0fsb5r8 u39i ,1l each second is inz0ui g38bmh1gjrz5 f v8b9, csdicated.
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 u.;) zaiojv2r0 ,t lkfwnicycle moving in a straight line is shownfv;l .)tj0 okw, z2air in the 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 a unicycle moving in a straight line is ru*ps0(+/j:aldfxhkp iq0g )zm0* i qz9mo0ashown in the graph belo k*aiu)mo0j0h zs+(rl 0* gx0 /p:aiqpqzfdm9w.
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 -hy6ekw .dm(i4 7lgx ;-xcyq lthe 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 a1h4l 1huxy3akp rwra4) vz1(b marble on a table top for 10 seconds. For which time interval(s) did the marble have a negative veloch (1kxpa3rhlv ab4) r1y4u 1wzity?


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 descrio7a 1i: m)dibdbes the motion of a marble on a table top for 10 seconds. For which time interva)17bdi oamdi :l(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 marble on a table toysvn h*a zv+la3(niwk),q )hn29 dy,i p for 10 seconds. What is the marbles averag3v)s*,avd9ai h qi2 +nwynky h(n)z, le 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 uniforif d.s s: 8.i;jzcbdd)mly 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 dowg7kr,t 8ap j)cdr6 p6jnward 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 repres+utmy0;q4 ly fent the motion of an objec4yf+;tqmluy 0t 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 j7 txkf x0mj*+the floor for 10 seconds. What is the accelerationxk +j7xm jft*0 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 grax +zp:6gmea3r. byz,y ph describes the motion of a toy car across the floor for 10 seconds. What was the total displacement g,zy+e 6mp:r x.zay3bof 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 toy car across the fac omx jndy:m ,;fxmr 1i);yuh. l4,f8loor 4 mxnfd imr1l;:x o,hua; cy)f,.jm8yfor 10 seconds. 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 uniformly from 0 km/hr to 60 km/hr in 4.wf -urum8p1*jmo , nw*50 s. Which one of the following choices best represents th1owu-*j pumw fn,r*8 me 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 of the followingv :k;bfttr cg*x.c k17-pv*il statements regarding its motion is cvbv - *crg*t1.;:kxl tpikf7 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 quuvn11/4pgk6d4vc. ky u l3daccording to the velocity versus time curve shown touvq4/y1u 6u ckp1 ngvl d.3d4k 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 thatubl a 10du:rq1 the angle between the velocity and the acceleration of the ball is k:u 1ld1 r0abquept at a constant 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 kilometers apart and traveling toward each other.pr /tg h3pd+(lw*mna/e6mt e+ 6+mn*p am/p r +l3e/tg(dhwte
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 positidx dy17nx 01ffs7/; nn+a st z78gayukve and increa0 71fx /snyzsnntg7 a;ykax8d+f1 du7sing

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 velocity +tu g6ml ;gm ik sn/ ;g9k)/t20rnxkuais

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 oneuyfyq 8ef*6p j 8 ,68u.lyybam of the following choices identifies quantite* 8yq,f8p yj6 m.u6yulbfay8 ies 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 * gf kmegdg/,:k8r63ani)mp rq9urx6 $3.0\;m$ 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-tdz 7t+i6m1*ydghjq7x3jgq)2rh y;wwime, $y\;vs\;t$, 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 ri1 xnob,j k,3gxg hoa.0ght along a one-dimensional track for total time T in twoj,0xn 3b gkox.,ghao1 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 s 9g-nbg.ff-mm3qb td2 *cs0ccar on a straight track i 9b-2cfg*gn-ct 0 dfm bm.sqs3s shown in 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. time graph for the motion of a car on a straighypl)ac9; at; 5wzxxso -7nr* lt track is shown in the diagram. The thick line represl)-rcp5at sa7x;lzn;*w yo 9x ents 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 motm0 klih,nq k61q x6nnf-*f7uf ion of an object given by the position vs. time graph shown. For what time(s) is the speed i-k67nf,nl n0f u6mxq* k1fqhof 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.uw)a(b ag3h2tsn07 uion hj /8p ::hnt time graph shown. For which time(s) is the acceleration ofa8wnpt0b ( hsgah23)i:ouhjun n/t7: 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 yrqa16-znoela-+i f .6f jho fk)bl)9acceleration vs. time graph for a fixed time interval of an obji.bl -r1ff 6 qjaleo+hn9azy)f6 )-koect’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 iz+3lhk kp*m4 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 tr dq: x1o( vh6dnr8yqh7ip 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 is releasedmmd,. -jgu q.l 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 o1h 1wjlkf3lfz16x 8mwt ,-sq 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 particleu3.;yqd8ah, -w a;kan6ks yau moving along a horizontal axis is shown. What is the total distance traveled by the partaw a3 kdsn ;y;.auay-hqk8,6uicle 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 followinb/s b4dk/7f*pm 3 dowdg choices correctly identifies all of the listed situations for which there w dbdkd 4/s/f7*p ob3mis 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 alon)cswby vp:q )r*/ i0meg a line is shown. The objv)e)b:py0ws*ic rm q/ect starts from rest at time t=0 s. 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 orig s4 +agd kd/o/5nviqs;in and its velocity along a line vs. time is graphed. Which one of the following choices best gives the pro ksa 5id s/vqd;g+n/o4per 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 the right on a horizontal track, each with constanb e)( fo/yl:y4 jb-ywpt acceleration. At an instant of time, the information aboly bpe4fo yy/bj -w():ut 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 xn73h8oatir9b*y/ txa 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 followin1n;s-y m tzpt0/i;j2wgx(f omg choices correctly describes the rel;zi; nyo2sjwt/- xpfgmm0t1( ationship 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 instants of timeuo:)d ,bgxnmh:vnd 2smav1 hk.(0au;, at which ;n(d,.vv:2 0)gukuhom bsh:max a n1 dthe 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, each start from rest at the origin and will move cf* 0s pk;+(j iuvr/voalong the x-axis. The ars+j/k0c*v;iuo(p vfcceleration vs. time graph for 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. m1 5 r zdexflm13xks73time graph of an object moving on a horizontal line is shown. At what time(s) is the object moving with im 3fez17dl rks1mx53 xts 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 follu5t j*tg5 gqnlb 8;ml:owing the position vs. time graph providedm5*tl;b: 5g ltjgqu8n. During what time interval(s) 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 20:47 , Processed in 0.597569 second(s), 165 queries , Redis On.