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 radiusu4 lb4ovy6tekoha 8/a,2vfk . $R$, 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 tet2 )xw /5 ewd w0doj96:ptn bdk-*bbfo a particular direction is cal-dje bt:bn *2 dexop )db/fw0tkw 6w59led

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 complexof+e yk135jtai e)uu/int 6x-h7 ot/ tes one lap around a circular track at an average speed ohoi t y)/x-jtenafo75kt/6x1u +eiu 3 f 50 m/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 con u2(kkd rmi nd8s(z-)ostant velocity. If it continues, how fao8kdd ukr- im)s(zn2( r 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 plank that is sliding at 5.00 m/s )rz(q/y(yqni8d2vg y to the right across a friction(i )gqvynz y(2/y8 qrdless 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 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+ter)z*ho6ez km at 100 km/h. What is the average speed of the motorist on this trip?ro+t ez ze*6)h

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* gaizbqmi. 7))cnu.d m83wer-axis. The grapb 3)cag*m i) id.rme.87zquw nh 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 refers to -6*yphzt4f* qif 8t; 0clu dlhthe motion of a toy car traveling along the x-axis. The graph shown below is a plot of the car’s velocity in thyh0 6l*;pl*-ctq 8fzf4di htue 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 travelina-ht tr5b s.g/ )ymcm7w3r oa8g along the x-axis. The graph shown below is a plot of the car’s velocityhr )7ragwybmctm/a 3.5so-8t 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 of a duck flying due south for tpyoc( dyfi6t: :qyt jx4fo04:he winter. At what point did the duck 4ty ty o4x6o:pjc:fqd:(yfi0stop 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 ref1fcyz hw /(,l(ngkn1n er to the diagram below which shows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight 1h lnf wgzk1,n(/cny(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 bsl42nnjj.vf ixsvi8-un;y oq;i + i -,fic)4welow which shows the position and elapsed time of a car starting from rest and uniformly accelerating in a straight line. The averas l; ;)fqyi2s+--oin n ,8i.ivfunij wc vj4x4ge 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 obh0uxr0t.k :* hk d,grbject with the position time graph shkr u.*khxrdb,h:0 g0town 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 followiisp/ / eqwep92 kt7 yb2t/pps9ng information. An ideal elastic rubber ball is dropped from a height of about 2 meters, hits the floor and rebounds to its original heiy /tb9/7pw 9sep pqet /i22kpsght.
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 quey 6u8 yfgc.yf-kc3/kt stion refer 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 originalcu.kt/yc8f gk f- 3y6y 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 f n;6etycn91om m2a;h pnep+ :$v$ 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 sceqci (vkbd934 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.
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 scenau1m2q* mgz.w prio: 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.)a2g :dr uewz 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 scenario: irz kna (a q8tke((u*0c-o-ewd/-gqb 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 horizonx-elyhs888i kr 6s6dutal table top and off the table edge. Which of the following would best repxhl i6s6 rey d8u-s88kresent 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 bep*i rmosz)qacu 3pkt8cz,)1mb 37v8 stween distance and time for an object that is mov3)o8km*mvspa q), 7prz 38 cbtz1 icusing 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 for an obq lb.z5lu8zpkxvi; u v+.- i;bject that is moving along a straight line. Between what times did the object have a non-zero accelerai bv ;k.iu;5 -8xzvqu+.bllzption?


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 straip.y u*c2fdo25 (4aqs hltrp,bght downward on Earth with an initial speed of 12.0 m/s from a posb4rcp ,5 saud(.fo*p 2hl2tyqition 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 ti+ajp.3w7 gmwm 3gt+e-yt6/hngb b z4oy car starting from rest and uniformly accelerating across the floor. The time and distance traveled from the start are shown in thwj m6-.3g3+ bnm tg7ziyhwt/ gp4a+bee 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 znj(yu31o7r)sdr 7p vrepresents a toy car starting from rest and uniformly accelerating across the floor. The time and distance traveled from the start are or3)7s1n7yr vjud p(zshown 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 3u nr*kb1n x)nrepresents a toy car starting from rest and uniformly accelerating acr*u3)nnkb1n r xoss the 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 accelerating ball. T j9m:qpxvgo it5)+eu( he position of the ball each second is indicatx tj mv 59(piguo:+)qeed.
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 ah k.alb+ n6xz+ccelerating ball. The position of the ball each 6bn.zax+kh+l 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 mov1;.6 pd+jqq tjhowv)wing in a straight line is shown in the1 jtq).hvqj wod6pw; + 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 clowxz701 t ):p -lovmqraan on a unicycle moving in a straight line is shown in the graph bel a xm 71l)oaz:qr-pt0vow.
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 n . kwnf,t;2mhdlsl -4bzoy*4a 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 of a marble on a tab ,d+k u1aj 4e z(nwl7+jfyagl2le top for 10 seconds. For which time interval(s) did the mar+aagl 7yj2e4kj ldz wu+(,1fnble 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 mwh6(-7vy-fl :e ,vxzmvaud724j t viyarble on a table top for 10 seconds. For which time interval( vjvx -l,-yfu7mhz ti7ay2( w4:e vv6ds) 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 marbl o(/er+ covnq8e on a table top for 10 seconds. What is the marbles aoe qcn+(v/8roverage 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 unifo. g*gct*kyd/8*nml w prmly 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 downward withfoozj fvz;n+/.;h a,m 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 cowbzbk zk/) ifsz 4a1-6uld correctly represent the motion of an object moving with a constant spee6 4zkz)swa1i b-fkzb /d 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 accompanyingx3 q2;: zej ,ai1tcfzg graph describes the motion of a toy car across the floor for 10 seconds. What is the qezfgzx 23a;j1c i:t,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 aq ( uzu :6bi.i4ldr)aa toy car across the floor for 10 seconds. What was th6(az rql dia: ui.)4ube 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 des7knls9 3zo 6qxee, d)d:ildw:7p2famcribes the motion of a toy car across the floor for 10 seconds. At what times or time intervals must the net force on the e7x6of w: d9l,imnk7seq2 p)l:3ddz atoy 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 uno29kq y7+ r/rt3bcqlg iformly from 0 km/hr to 60 km/hr in 4.50 s. Which one of the following choices best represents the acceleration of the/2ktlgroq cby r3+9 7q 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. Wh/ivv1op8xa nq 8y1;fd rrg; z6ich of the following statements regarding its/fx d 8vyrvq8 zog1apr ;in6;1 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 th.:lgbx uj* 8xj9 p.acezvt, ;fe velocity versus time curve shown to the right. j pzgv9 x.at 8:j, xl*u;f.cbeWhen 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 tha;1 r zrytf5k9ht the angle between the velocity and the accele5rfrkt91z yh;ration 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 150 kilometers apart and traveling toward eachhupnrw:t8-m cw.5 wlvo2p x h2g-ug6 .2te 4uj other.2.e gjg5.o2n4u8h c6lpurhp-x: uwwt2tw mv-
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 a y7 c wpe2wpvje;;1pd3cceleration is positive and increasiwp2ec; jwp1epydv 3; 7ng

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 av; nnso/b o.n*berage 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 dimensions, which one of the following choic2o urgi s2- ge53enj*wes identifies quantities that must have thij25eeo*- ns 3gwr2ug e 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 movet1rxq sqe k -t+dq,c eyfb4:34ghv; e: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-time, 4+u +5/chylvoyz * txb$y\;vs\;t$, 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 f b f rnjrlqs w2cqs/8y5c0d4x eq16q89or total time T in two parx w896crf/8s 0sq jedq14qq5 nbyr2cl 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 grapt zvwi*s f z3:qssq-:xyzd :i5tag(;3h 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 3dqvi3s5ts s ;wfzzy*- zg(ax:i t: :qstarts 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 avkf+ks :t q1(z/7quid straight track is shown in the diagram. The thick line represents the velocity. Assumkf 7i: qsz(d/ +vuqkt1e 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 motiondojmf. (y60p n of an object given by the position vs. time graph shown. For what time(s) is the speed of thj( 6onpy 0m.dfe 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 graph q60t1 np1onsk9 5cwaz shown. For which time(s) is the acceleration of the object equal to 1 1k50 aocsz q9pnwnt60?


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 fixedpttoh9h-a n8 ()v tc*q time interval of an object’s motion, what quantithtt) cahp-v(o 8*nt q9y 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 ala8k -);lzsx;wue .rd iong a 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 t)e0* teidmy u*wo 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 .a* j/nx: cqx,uzoy/ z(1vjwb 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 reletk.)) oyc2qqmqf x(; iased 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 particle moving along a horifchw4p*ye4x8 df 1/ zwzontal axis is shown. Whh148fe*x/ fzwpc d4 ywat is the total distance traveled 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 choices correctly identifies all of pe :tzeuj/0s,3vm0m k the listed situation0ptukv 3,0me/ jms:ez s for which there is 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 v gfzf;0zr gnn3ty9 yr90f)n .es. time graph for an object moving along a line is shown. The object staznzn)g90t3rf .;9rygf n 0efyrts 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 origin and itvl - zo 7j(fztq,nj:b1s velocity along a line vs. time is graphed. Which one of the following lo-bq( v:jfnzzt 17j, choices 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 th6h1s*8ggmr.1 mnnolle right on a horizontal track, each with constant acceleration. At an instant of time, the information about the cars is shown:omnng m1l 8* l1shr6g.
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 positio 74n gcz-ujjq2n $x$, 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 graw:p3ow1 y) be*zhy x5s fgt: ;xjvc7s;ph, which one of the following choices correctly describes the relationship between the average t: px: g )fsvxbjcw 3zhw;1y*;y57esospeed 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 choiceszos3 m1 run.ywc 7:*kv*p7td e best describes the instants of time, at which the car and truck travel with the samctv3n u.7w*m:kp e*srz7do1 ye 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 u-bzr xl ),*1 hi+az +vl-hsnlwill move along the x-axis. The axzva+lnu- rl sz*-h 1,h+li)bcceleration 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. time graph of an obl5h,2. il b9wwjt 3wyaject moving on a horizontal line is shown. At what time(s) is the object moving with its gji23y tw5wl .a,hbw9lreatest 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. y05)hg wj v8; evui7evtime graph provided. During whathvvi 70egue; w)vj5y8 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, 2024-11-22 01:19 , Processed in 0.457168 second(s), 165 queries , Redis On.