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 constant speed around a circular path of en4yuif zuzy: 1h/c(gs (u+*; g4ddfxradius 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 dist6,yugr14p - qgohj u guwxy:11ance per unit time without reference to a particular direction is calleou11hxp4ygy: gr1-u w ,g6ju qd

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 arne8c djne+d * o 1ncra+6yyilh--ra82ound a circular track at an average speed of 50 m/s and then completes a secon+ no+c-yjca2arihd 8ne1 lr*y6-d n8e d 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 thjf/ct/8ru3o d e constant velocity. If it continues, how far will it travrt// 8juf 3docel 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 stamv u fs o41/4dim52-:mw osflotionary 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 startsswm1io d2u4-vmfm 4:5s/ lfoo 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 100 km/h.q8;yap wx5t1 jl )tn*z What is the average speedz *w;1x lpt5ty)8nja q 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 traa581r3go fdvv7j l9gvveling along the x-axis. The graph shown below is a plot of the car’s velocity9 g3j8a vvorgv175lfd in the x direction, vx 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 motiopsx3;ac ) t,s:k/ nozsn of a toy car traveling along the x-axis. Th ps snx:z;s/ 3acok)t,e graph shown below is a plot of the car’s velocity in the x direction, vx 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 trave/fzi7antp( :/uq 7-yynn m;n* h8 pgwaling along the x-axis. The graph shown below is a plot of the car’sa/ninyh(ynm7nt ; : u pg-q/z8w*a7pf velocity in the x direction, vx 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 f b.v:6 ou*uaz x:8eqdvelocity vs. time of a duck flying due south for the winter. At what point did oxu *u qf a.:d8:e6vbzthe 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 belojrl/y+lm .:-uxbhwo 4 w which shows the position and elapsed time of a car starting from rest and uniformly accelerating in a straiy:loh jw b+l-4x/um.rght 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 diagr9:u+o2rorl2p 5v *x 4c7uifmue(zz sf am below which shows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. The average am(zi2p5rluro:4*uu z x o cff97sv+2ecceleration 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 grau0(p0ps7cm.ldgysj m84 sd9rqeh6m . ph for an object with the position time graph sle.4p.sgm6 0 shd( q j0mrc8sp7umdy9hown 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 informat jfrsz +j:7/xaajb -j3ion. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor and r3a-j+jx / : rbsz7jafjebounds 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 rxr 8aqfw,7kj8 efer to the following information. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor and rebounds to its original hei w jrk87,xaf8qght.
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 witok -m/:(6w*uftmbueq(o ,k wxh 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: Ap,vry wc9zdjd qz.:*p -lhdpx663 t-qt t0, 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 tui,p2tsn 7t n6o the following scenario: At t0, 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 t0 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 sce/:s+ v-o/a f q8yyp mudaau:j,nario: At t0, 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 fol2e u1v5 ,fg2dk0oqu 1*j . rbjctdfct3lowing scenario: At t0, 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 horizontalxi 7/1fk y0qpx/ ukzj9 table top and off the table edge. Whi1q9zykx 7/jpki u f/x0ch of the following 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 relationship between distance anv* /vf6ndq sje7g n2+bd time for an object that is moving along a straight line. What is d2j ve *nvb7+n gqs6f/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 represents6mxl1 7t4ht ,)kzzky/mcwm 4 i the relationship between distance and time for an object that is moving along a straight line. Between what times did the object have a non-zerotm4xlmh7 1z t) 6 ,wcki/zy4km 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 with an initial speeyr8u)gk cit/j;ws xu+2/p i:ed of 12.0 m/s from a position 10.0 m above the ground. Ignoring air resistance, the speed of the obje sru;weuxc/i+yt)/i 8j gp2:k ct 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 andk1/xrw,08lh/el hst w uniformly accelerating across the floor. The time and distance traveled from the start are shown in the k0 wh/,1xrwlh /8tlsediagram.
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 an/ i mwx6b qol/ah+hg 9f-q6p9fd uniformly accelerating across the floor. The time and distance tr qb+m6qx a9ilhf9/ -hfwpgo/6aveled 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 resofc-d 9v0 n9hqutq6k 3t and uniformly accelerating across the floor. The time and distance traveled from the start are shown in the diagra0 v9kodu-nch96qq t f3m.
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 s f ,iv8g19lr:o .yndcm1fq f1yhows a uniformly accelerating ball. The position of the ball each seco1v.8:o lcgfdrm1,fyfn1y9qi nd 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 shows71q-fse+3 f)ytfnhv jvj 8ir5 a uniformly accelerating ball. The position of the ball each second is indicatedj8-hfvysq +tf)15 e n7 vjf3ri.
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 a q8x4fp ntb9)unicycle moving in a straight line is shown in the bqf9xn8a) t 4pgraph 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 irxx 2 a nit2;)zrit z)/i s0grsm-/jw+n a straight line is shown in the graph bel)r/j2iwmtssz-r2 0 / r;at+xzn)xiig ow.
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 freel nm/.il/ *ubgby 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 o 8qnb d43llfgpq a824af a marble on a table top for 10 seconds. For which time interval(s) did the mbn a f8qqp43lgl 4da82arble 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 modefn ,:fhg15dtion of a marble on a table top for 10 seconds. For which time interdg1hf 5d:e fn,val(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 ony;f s8xe vi(,hveq0p9 * jl3hhy5:ikj a table top for 10 seconds. What is the marblesei j5xi9 ,f3;80* y(: qlshy hvpjkehv average 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 d-1qw dfrhfc.cn 2/p ;uniformly from rest for a time of 2.00s through a distance of 4.00m. 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 downwarl *vym si4e3:5kavdd6n, vos7d with a speed of 20.0m/s, takes 2.00s 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 represent thgcf 6hm rpm(h,f8fcwe 4g6+ -te motion of an object6 ( mc,gf6fg +hrehm4-w pfc8t 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 accompanyiu,jp lr3js33i1h yz x/ng graph describes the motion of a toy car across the floor for 10 seconds. What is the acceleration of thepi 1y x,su3 rh/3lz3jj 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 the floorihuere(nu,b x* x5r.; for 10 seconds. What was the total displacement of the toy caeh;rn.(bui5rx x*, uer 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 djm5 7 ;ome7koys z:8ymotion of a toy car across the floor foro5 mdysokmj:y7 z;78 e 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 kmu w/9bsfkktu-4h3 cd: /hr in 4.50 s. Which one of the following choices bestdtuck43hf9w/- s u: kb represents 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 o1xw8g 91layj nf the following statements regarding its ya81glwx j 1n9motion 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 th9v-e2ci xhwl 45k) zmke velocity versus time curve shown to the right. When does the zm2k-c5lkv4)hw9 x i ecar 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 s33 5ob/ *2nw)tut lyopn,tn vof time, a tennis ball is moved so that the angle betwe*2ptonbst yo v w 5)utl3/n3,nen the velocity and the acceleration of the ball is kept 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 1s/jc qqswz t1:*- 08d0ni/ yk0vkdsla50 kilometers apart and traveling toward each other.qzj8q00 0d n/vklscia*st1 w:y /k- sd
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.jw:rw-bp s 7i*57p3iprf fzu7 When the acceleration is positive and increas*ui 3r r5p7w- sp:zfjf7 i7bwping

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 averazeqw/hn -; oq5ll:bp ,ai 8mq-ge 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 motiort5 *eojq1skdvu,) w8 n in two dimensions, which one of the following choices identifies quantities thatu5ev8k*,1 tdsrqw)j o 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 mov8s:i zhvo s2 *;lk 2tv29dfyoqes 3.0m to the North in 1 second. The car then moves at 9.0m/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-tir;kk w+c;, h, /kib6g+xcll tbme, yvst, 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-dimensionhf1a7ydo0ogto8 xw4f+7 ) wk lal track for total time T in two paa wo 80l1)ftkgox+o47 7dfwhyrts.
• Part One: The car maintains constant non-zero speed V for the first 34 of the total time.
• Part Two: The car accelerates uniformly to rest during the last 14 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. tisdf2p*vz,pxg a-ep)c5 ;nti ( me graph for the motion of a car on a straight track is showc5z,n fg2p s xp;p(v-)*eadi tn 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 m:52 7rja*0e uweu ytjootion of a car on a straight track is shown in the diagram. The thick line represents the velocity. Assume that the car startsru t0jw o2auye* 75:ej 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 of an object given by the ;uu+ -wpgfq*tposition vs. time graph shown. For ufg*p;t+w qu- 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 obje:z asrz57 pg/vct given by the velocity vs. time graph shown. For which time(s) is the acceleration o /5:vszgazp r7f 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 accelerat nvr k g3qx39or13d 7eyd5ap4aion vs. time graph for a fixed time interval of an object’s motion, what quantity has been detere3 dy3 3 vgdrx7naapqr51k49o mined 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 speed.aawbg84x4 ttm 9am)c )
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 zjf ok8jj8/jcqk j3c .9u, *qmtrip 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 released from rest and reaches the ground in a tiea:jk;a 6xlz) me of 2.50s. 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 l- 69 +gj27bfjqlim gpsd0i8kfrom rest and reaches the ground in a time of 2.50s. 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 alqrnatj va3j 3b ;e(w(6ong a horizontal axis is shown. What is the total distance tj6qt(; a( ejnwrb3av 3raveled 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 c0vx*fv;y yutwj (zb)xp2dbx: gs /5.phoices correctly identifies all of the listed situations for which there is a n*btyf. /y 5xv;g ):0jx (pubp2vzxwsdon-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 ,cuzgh0+qf :p line is shown. The object starts from rest at time t=0 s. At what time(s) does the q:zf0+chu ,pgobject 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 b-f;d r6tshy. at 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 f6y bf;sdrt .h-rom 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 trac-snkc+a r7ro*k, each with constant acceleration. At an instant of tir-cr+ok n a*s7me, the information about the cars is shown:
Car #1: position = 125.0 m; velocity = 13.0 m/s; constant acceleration = 1.5m/s2
Car #2: position = 80.0 m; velocity = 9.30 m/s; constant acceleration = 5.5m/s2
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 5c4-gop4 cqcqx, as a function of time t, given as x(t)=1525t+10t2. 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 foll.dhsrayz lv05.6;wc 6: dquq powing choices correctly describes the relationship between thes6. . vur pl5h;w:qqc add0yz6 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 ti4/l0vd+ls as)u3s xt ame, at which the car and truck travel with the same speedlvs0a tu sa+ )3lx/s4d?

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 andtln-opv-);zu y3u- bu 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 p--u; vnotl)y3-ubzu 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 of an 3 g ;udiy4r 0a.xld4kh jsd/8robject moving on a horizontal line is shown. At what time(s) is the object moving with its greatest speadls.hur4ji; yrd /3 8x0k4 gded?


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 focbq7mg.nc 19 yp/lt 9uv:f qm)llowing the position vs. time graph provided. During what time interval(s) does tm:q )/qpvcy91m n9b.7 uf glcthe 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, 2025-4-18 03:04 , Processed in 0.575232 second(s), 165 queries , Redis On.