Suppose that an object trave:1 n bbngcb/pbt( pu .j-5ui,yls from one point in space to another. Make a comparison between the displacement and the distance traveled.pjy:b(npiu1n -ubc ,g bb/t5 .

  When is the average velocity of an objeh/,tzqh yv 15pct equal to the instantaneous velocity?

  A new car manufacturer a*cqy :a/c*del hfm1)edvertises that their car can go "from zero to sixty in 8 s". This is ycqedl haf1e/**:m )ca description of

  An object moving in the +x axis experiences andd+t*) zhjec 8, j-alusv6*i; x8clmg acceleration of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to the East (+x directigl z.,w7 4kuo3gtv/nt pk *7r 718zxdyran ne+on) begins to slow down as it approaches a traffic light. Make a statement concerning its accelerationkrtt */ wgngrpa,+717z oz.d8e 7nkxlvy u3n4.

  Suppose that a car traveling to the West (-x direction) beg24mimuieujh;6:q ) lqins to slow down as it approaches a tlm i)4q:ieqjmh6 ;uu 2raffic light. Make a statement concerning its acceleration.

  Suppose that an object is mo5ga1e ubpcr v7+kt8x 8ving with a constant velocity. Make a statement cont8r5g+apv 71e 8 ucbxkcerning its acceleration.

  If the velocity of an object is zero, does it mean that the acceleration is zei n,( fmbmwcp,m;7o, vro? Support your answer with anwbn, co,,mmm; ipf(7 v example.

  Can an object's velocity change direction when its acceleration is constant?6szv h1c9loe, Support your answer with an exampch s1o9elz6v, le.

  Suppose that an object is moving with constant acceleration. 2yd9m7sq3 gol98pg aioc5f y; Make a statement concerning its motiong 9apqy 23col97o;y 58imsfgd with respect to time.

  Can an object have increasing speed while its dc*yfa va/ i7+acceleration is decreasing? Support your*id7 fc+ y/ava answer with an example.

  Suppose a can, after an initial kickh ,3)qunghuc4qh t/ t4, moves up along a smooth hill of ice. Make a stateme 3 u,q4tnt)uhhgh 4cq/nt concerning its acceleration.

  Under what condition is average velocity equal to the average of the ob9tsiy +xmr*yib( o, )avz-h/d ject's initialv9 y)*,rt bi i(azhmy-/oxd s+ and final velocity?

  Objects A and B both start at rest. They both accelerate at the same) v0bj.(gbyba rate. However, object A accelerat0a( g)bbv j.ybes for twice the time as object B. What is the final speed of object A compared to that of object B?

  Objects A and B both start from rest. They both accelerate at x/zp y5vl ec., rti*h de(g,u5the same rate. However, object A accelerates fd p,ygvl,5c(xtz u/*eeri. 5 hor twice the time as object B. What is the distance traveled by object A compared to that of object B?

  When an object is released from rest and falls in the absence of fricct4+ wm(o, msejtnr 5*tion, which of the following is truew*om(mntrse5 j 4t+,c concerning its motion?

  When an object is relejfg34 r fq(3fvased from rest and falls in the absence of friction, which of the folgrjff( 3fvq 34lowing is true concerning its motion?

  Suppose a ball is thrown sfj4 p+l(lm4 igtraight up. Make a statement about the velocity and the acceleratiljm+g4fl4(i p on when the ball reaches the highest point.

  Suppose a ball is thrown straight up. What ipffn5a fc86a on+ /*ups its acceleration just before it reaches its6/acp +f58fa*n opf un highest point?

  Suppose a ball is thrown straight up, reaches a maximum ho5twb 5 zl glko;,y1.veight, then falls to its initial height. Make a statement about thl ob;.l5,z tg1v5 wkoye direction of the velocity and acceleration as the ball is going up.

  A ball is thrown straight up, reaches a maximum heig 0mdy/3 mc eu:v-ctkj5ht, then falls to its initial height. Make a statement about the direction of the v:yc3m5dtukve j/0m c-elocity and acceleration as the ball is coming down.

  Suppose a ball is thrown downward inl/n uhvce; sg2w/2 nt0 the absence of air resistance. Make a statement concerning n che2; g 0vlswt/2un/its acceleration.

  Suppose a skydiver jumps from a high-flying plane. What is her accelers r.pxb 8); h,yimu*cfation when she she reachesh;i .f 8sb* ucrpmx),y terminal velocity?

  A ball is thrown vertically upward wi5n,i7f g+gyaith a speed v. An identical second ball is thrown upward with a speed 2v (twice as fast). Whaga57g i +yn,ift is the ratio of the maximum height of the second ball to that of the first ball? (How many times higher does the second ball go than the first ball?)

  Ball A is dropped from the top of a building. One second lv*//s t 6 qloi-ivmvw/ater, ball B is dropped from the same building. As time progresses, the distance between s v/* liivvm/6-tqo/wthem

  Ball A is dropped from the top of a building. One sec g s)6dqa+2jqpond later, ball B is dropped from the same building. As time progresjdap+gq6s)q 2ses, the difference in their speeds

  Two objects are thrown from the top of aqhp c77uj1+51:bqriu;igh vt tall building. One is thrown up, and the other is thrown down, both with the same initial speed. What t gh vjru1ui7p 1qb5q;i7hc: +are their speeds when they hit the street?

  A brick is dropped from the top of a buildiu vptw87p7 gk9ng. A second brick is thrown straight down from the same buuwpg9v7kt78 p ilding. They are released at the same time. Neglect air resistance. Compare the accelerations of the two bricks.

  An object is moving with const+ g8fsjup5t 0cant non-zero velocity in the +x axis. The position versus 8cfpj5tug0s + time graph of this object is

  An object is moving with constant non-zero a6;mctdb ok7beogd -y.p gh03 /cceleration in the +x axis. The position versus t d/y dkg oh6o-e0gbb3m.7pct;ime graph of this object is

  An object is moving with /po2qk*2xc od 1cg, clconstant non-zero velocity in the +x axis. The velocity versus time graph of tho2cg cdolck/1q,2x p *is object is

  An object is moving with constant non-zero acceleration in the +x axry 15yt4rd-n lis. The velocity versus time graph of thir1nl-ry4t y 5ds object is

  The slope of a position pbf ,96ebir9 oc9c 6jiversus time graph gives

  The slope of a velocity versus ti bd7a.-j9 pu2c 6tscnvgy 7di8me graph gives

  The area under a curve in an acceleration versus time graph givx.7 5xom4r2 bswf0nl pes

  The area under a curve in a velocity versus time graph givw w ,evwo ,9ec2;b(xaues

  If the position versus time graph of an object is a horizontal line,b zd3 tpe5+ z/zjbj*n6 f3iiu0 the object i 3+ beiunzzzdijb60p /tj*f53s

  If the position versus time graph of an object is a vertical line, the object is ./4i hbfxjg8fj hbg4xf.8/if

  If the velocity versus time graphww wfer0,g 5;l,nz3 mz of an object is a horizontal line, the object ;e5wmz0wng, w3r,f lzis

  If the velocity versus time gra;/d.as5uq b6aa l /deaph of an object is a straight line making an angle ofsl /aaq e; db6d/5a.ua 30 degrees with the time axis, the object is

  An object moves 15.0 m north and then 11zplv.q,gqu.d5 fg6p ;km 1n45u0v vlq.0 m south. Find both the distance traveled and the magnitude of the displaceme,gd5vl;.qvz4nq.kf 0uv6mlpq pg1u5 nt vector.

  A boat can move at 30 km/h in still water. How long will it tw.6m2x/g,qd n3sd rx co58te dake to move 12 km ,mx2der3o6sdtw 5cdn 8 q/.gxupstream in a river flowing 6.0 km/h?

  55 mi/h is how many m/s? (1 mi = 1609 m)ds2)v4ssi9g1 e ltujzbh+0 q*

  What must be your average speed in order to travel 350 km in 5.15yfia4s ui 9/3f h?

  A runner ran the marathon (approximately 42.0 km) in 2 hounw6 g +qj/h:dbrs and 57 min. What is qjgh6 n:d /bw+the average speed of the runner in m/s?

  A car travels 90 km/h. How longogxju8 m/qj, ( does it take for it to travel 400 km?

  A ly (light year) is the distance that a4+y,zbmeuoa8z-:v (e hd,x*z6v lh c light travels in one year. The speed of lighecl m v* bu+zd:y,xhzz,8-(oa4 av6 eht is $3.00 \times 10^8 \; m/s$. How many miles are there in a light year? (1 mi = 1609 m, 1 yr = 365 d.)

  If you are driving 72 km/h along a straight road and you look to the side for 4.gv;8,.izba( k6lpynokm; *q q 0 s, howkv ;qkz;, yina( 8 gbp6.o*qlm far do you travel during this inattentive period?

  If you run a complete loop around an outdoor track (400 m), in 100f, r1-icipn8sd5u7k p--gf r g s, your averag ,8fcsing-i p5k -7rgfr1u-pde velocity is

  A polar bear starts at the North Pole. It trat 6c7 3dmqhnu/vels 1.0 km south, then 1.0 km east, then 1.0 km north, then 1.0 km west to return to its sd/qt uc 7nhm63tarting point. This trip takes 45 min. What was the bear's average speed?

  A polar bear starts at 5w:uv*ow j1c nthe North Pole. It travels 1.0 km south, then 1.0 km east, then 1.0 km north, then 1.0 km west to return to its starting point. This trip takes 45 min. What was the be:o5*1vwuwncj ar's average velocity?

  You are driving home on a weekez+ cqgbn47pi7y*ht xdj 8d7 n1nd from school at 55 mi/h for 110 miles. It then starts to snow and you slow to 35 mi/h7+ dzqtd8yp41nxgih b*7 7n cj. You arrive home after driving 4 hours and 15 minutes. How far is your hometown from school?

  A motorist travels 160 km at 80 km/h and 160 km /1+gkt*z f eqlat 100 km/h. What is the average speed of the mot+k1el* tqfz/g orist for this trip?

  A motorist travels for 3.0 h at 80 km/j 8 yqtf ,zef.8as4gnl(hd9x, h and 2.0 h at 100 km/h. What is her average speaqg(8.t h,s4,8 ffzdl nxj9yeed for the trip?

  An airplane travels at 300 mi/h south fo kej7mg9/yu,xcwp9;kou w(dek0 )2vh r 2.00 h and then at 250 mi/h north for 750 miles. What is the average speed)uvceow,u2wk(xjk/9 ;ehm p907ykgd for the trip?

  In a 400-m relay race the anchorman (the person who runsoq* vnpyehyj :pj6no;. m .:x2 the last 100 m) for team A can run 100 m in 9.8 s. His rival, the anchorman for team B, can cover 100 m in 10.1 s. What is the largest lead the team B runner can have when the team A runner starts the final leg of :j* jmxoye 6n p nvo:hq.2;yp.the race, in order that the team A runner not lose the race?

  A car decelerates uniformly and comeemt - (bz09 9ejq) :l:foxvhkts to a stop after 14 s. The car's average velocity during deceleration w0tfth)elxbo:-z ( q9 kj:ve9mas 32 km/h. What was the car's deceleration while slowing down?

  An airplane increases its speed 9,k 9+imfa5yhk k3gux a6.yeafrom 100 m/s to 160 m/s, at the average rate of i.,+kyagmka 3 u5 h6x 9fayk9e$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h accelerates at k ncuw a1kv,ed 0q49tb/qy,g7 the rate of $2.0 \; m/s^2$. How much time is required for the car to reach a speed of 90 km/h?

  A cart starts from rest mx6, by)hln. spu m;o1and accelerates at $4.0 \; m/s^2$ for 5.0 s, then maintain that velocity for 10 s, and then decelerates at the rate of $2.0 \; m/s^2$ for 4.0 s. What is the final speed of the car?

  A car travels at 15 m/s for 10 s. It then speeds up+q,ci8sxi f.f; a4cu f with a constant acceleratioic4i;,fuqx. f8f +cs an of $2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial velocity of 7.5e9d46aj0ds 0towsy x9 m/s experiences a constant acceleration of d60s s49od etxa0 w5jy$2.5 \; m/s^2$. What is the cart's displacement during the first 6.5 s of its motion?

  A bullet moving horizon kt)y - :a 2ry(nyncxam( ew6*du4ap5ktally to the right (+x direction) with a speed of 433 m/s striy-w5ay tyr x(m:2uck 4 (ap6 nked)n*akes a sandbag and penetrates a distance of 87.30 cm. What is the average acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is launched from a q+3xcg2(7lij qt* xzgwde+ x-catapult on an aircraft carrier. It reaches a speed of 42 m/s at the end of the catapult, and this requires 2.0 s. Assuming the acceleration is constant, what is thewxcizlx-g 2+gjdeq + 3(t*7 qx length of the catapult?

  A car starting from rest moves with constant acceleration of /9 9b ygc* x-a rwsj3tpw9psl($2.0 \; m/s^2$ for 10 s, then travels with constant speed for another 10 s, and then finally slows to a stop with constant acceleration of
-$2.0 \; m/s^2$. How far does it travel?

  A car goes from 40 m/s to 80 m/s in a distance ofwxs ,, ,9zl(mdny. h umgm-yw- 200 m. What is its average acce m,w- yg h9s lzdn,w-(y,u.mmxleration?

  An object starts from rest and undergoes uniform acceleration. v/4r*tq.bc)kjxqa 8ib5i .vw v tet.4 During the first second a5t8 vt.rk4ev*.i/ q c.qw)btx4bjiv it travels 9.5 m. How far will it travel during the third second?

  An object is moving in a straeq/w, byo0lw k8e 0irm / 7a:fy9jz7ubight line with constant acceleration. Initially it is traveling at 16 m/s. Three seconds later it is traveling at 10 m/s. How far does it move during this time8u ik0z: mbe o7 7wjyel/0f/ryq9,awb?

  A car starts from restu7inc. pv ;44c:gsd mf and accelerates uniformly at $3.0 \; m/s^2$. A second car starts from rest 6.0 s later at the same point and accelerates uniformly at $5.0 \; m/s^2$. How long does it take the second car to overtake the first car?

  A car with good tires on a dry.czia/g*26jh, nz qm 0bj8 kwl road can decelerate at about $5.0 \; m/s^2$ when braking. Suppose a car is initially traveling at 55 mi/h.
(a.) How much time does it take the car to stop?    $s$ (only input numerical values)
(b.) What is the stopping distance?    $m$ ((only input numerical values)

  At the instant a traffic light turns green, a car th)nil46kcdb vh(f) ve: at has been waiting at the intersection bfkd)c4hvn()i vel6:starts ahead with a constant acceleration of $2.00 \; m/s^2$. At that moment a truck traveling with a constant velocity of 15.0 m/s overtakes and passes the car.
(a.) Calculate the time necessary for the car to reach the truck.    $s$ (only fill in numerical values)
(b.) Calculate the distance beyond the traffic light that the car will pass the truck.    $m$ (only fill in numerical values)
(c.) Determine the speed of the car when it passes the truck.    $m/s$ (only fill in numerical values)

  An object is thrown upward with a speed of 12 m/s on the surface of pl tccvw- l+9+atanet X where the acceleration due to gravitt a9c ++wtvc-ly is $1.5 \; m/s^2$. What is the maximum height reached by the object?

  An object is thrown upward with a speed of 12 m/s on the surface of planet X wajct1d 98d toew:- q(ybbg 5ju5dp 9x*here the acceluj5q9*boj p tydgdx w9e- tb(1:ca8d5 eration due to gravity is $1.5 \; m/s^2$. How long does it take for the object to reach the maximum height?

  An object is thrown upward with a spnt e yslb) ,-, 40xnps,nui3iyeed of 15 m/s on the surface of planet X where the acceleration due to gravity ie3t0s n ,i- nbn,,ysx)luip4y s $2.5 \; m/s^2$. How long does it take for the object to return to where it is thrown?

  An object is thrown upward wdou(a 7co11 rzvu5toab8b 4 ;fith a speed of 14 m/s on the surface of planet X where the acceleratioaf7r1t;oc8b od (51o v4az uubn due to gravity is $3.5 \; m/s^2$. What is the speed of the object after 8.0 s?

  Human reaction time is usually greaterwz+l -feho( casf)*8 ogb7 bm5 than 0.10 s. If your friend holds a ruler between your fingers and releases it without warning, how far can you expect the ruler 7oao*zhs5 w-g( 8mff)+lb bceto fall before you catch it?

  A ball is thrown upward at a velocity of 19.6 m/s. What is iuz (8u(j+f *xf, a1jl (bya+ (kw3 rivh6avwelts velocity after 3.00azr ex ((l3w*ju+fw av61bhki l,u v(fjy8 +(a s?

  A bullet shot straight up returns to its starting point in 16 s. What ix7ysshio 9q )v9g3)tms the initial speed of tqs7mogx9)st) i 3 v9yhhe bullet?

  A ball is thrown straight up with a speed of 36.0 m/s. How*yqo gl;56nzmhxsgg/ 82 vk- 7ur5th t long does it take to return to its stah2o85-sv6t7mqn 5x;ht yz *u rg gg/lkrting point?

  A ball is thrown downward from the top of a building with an initial speed of zx/w :lyqk4 p)qmk wb8x*p5;8(naic x11 m/s. It strikes the ground after 3.7 s. How high is thzqn4/a5*ymx 8bl8q;c (w pw pi xkx:k)e building?

  A ball is thrown straight up with a speeerwx22go u7 h9* 6bsikd of 30 m/s. (only fill in numerical value in the blanku2 iw 62srokx*g 7e9hbs)
(a.) How long does it take the ball to reach the maximum height?    $s$
(b.) What is the maximum height reached by the ball?    $m$
(c.) What is its speed after 4.2 s?    $m/s$

  A foul ball is hit straight up into the ar7m.weuh e7:o ir with a speed of 20.4 m/s. (use $g=10 \; m/s^2$, only fill in numerical value in the blank)
(a.) Calculate the time required for the ball to rise to its maximum height.  (数值)  $s$
(b.) Calculate the time for the ball to fall back to the height at which it was hit.  (数值)  $s$
(c.) Calculate the maximum height reached by the ball.  (数值)  $m$
(d.) Calculate the ball's speed 2 seconds later.  (数值)  $m/s$
(e.) Determine the time at which the ball pass a point 14 m above the point of contact between the bat and ball for the first time.  (数值)  $s$
(f.) Determine the time at which the ball pass a point 14.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what is the velocity at t = ,3g v /f,l/ncneaj1rk/ :g tcc.l/ppq 1.0 s?

  In Fig. below, what is th - d)sao7km-ll5cti:w y6g-b ee velocity at t = 2.5 s?

  In Fig. below, what is the velocity azgxt/z9 prk4 jo62.iaj8 eh xrwt ut6s:7/6wlt t = 4.0 s?

  In Fig. below, what is the velocity at t = *-7dg hnpq(wvwlu )b55.5 s?

  In Fig. below, what is the average velocity from 0 to 4.0 bwj-e sbma0 (*/ce meror.(b5 s?

  In Fig. below, what is the average veloh/ rh. n.ofn0 ndx8u1ucity from 0 to 6.0 s?

  In Fig. below, what is twmtg c) iic )c e01vzkr;.ic78he acceleration at 1.0 s?

  In Fig. below, what is th1jctu :) .8omznujhq n/krg8+e acceleration at 3.0 s?

  In Fig. below, what is the akw7b /+dmb 2lbverage acceleration from 0 to 5.0 s?

  In Fig. below, what is the average x /krmph t66k .692z fm,ncoznacceleration from 0 to 8.0 s?

  In Fig. below, what is t,.ao o:hu*lx che displacement from 0 to 8.0 s?

Does a car speedometer measure speed,k*(b-h5; gbct*n tn nr6q8*ebh ux2gs velocity? {speed|velocity}

  An object can have a varying spe2nwqv5bb d/ f1;tg;e3mzy vp -ed if its velocity is constant.

  The velocity of an object can be negative when its acceleration iv+ei(*c wvq7 -dagih; o66h mjs positive.

  If one object has a greater speed than a second14nns6 vfhp d. object, the first must have a greater accen6hns.pf dv41 leration.

  Two cars emerge side by side from a tunnel. Car A is trdlc/lgbmu 9 ((aveling with a speed of $60 \; km/h$ and has an acceleration of $40 \; km/h/min$ Car B has a speed of $40 \; km/h$ and has an acceleration of $60 \; km/h/min$ . Can A will pass car B at the instant they come out of the tunnel.

  An object can be increasing in speed as its acceleration decreases. n;t jkf 4a4jzyl18v/m

  A baseball player hits a foul ball straight up into the air. It leaves the bat wr we y1dlz 3g ;;ot80ax-xbb/pith a speed ofztx0e; y1/l-3prb gabx;w do8 $120 \; km/h$. In the absence of air resistance, how fast will the ball be traveling when the catcher catches it?    $km/h$ (please only fill in numerical value in the blank)

  As a freely falling obje6bdo ;k 6v*bv,bszd v,ct speeds up, what is happening to its acceleration, how does it change if air friction is ignv6kbvd * zbs;v, b6,doored?

  As a freely falling object speeds up, what is happening to in2wnynq- v 4n8ob4 q3yts acceleration, how does it change if air friction CAN NOT wn344nynbo vy8- q 2qnbe ignored?

  An object that is thrown vertically upward will rer ;-qpapf00j xturn to its original position with the same speed as it had initially if air resistance is negligible. If air resistance is appreciable, how will this f 0;x p-pq0jraresult be altered?

  An object can have zero veloiie0(+y ;:l-nod5yq dn5dzfocity and nonzero acceleration at the same time.

  An object can have nonzero velocity and zero acceleration at the same timepz2f.7 v v3yaa.

  An elevator moving from the second doe1gokr+ j:p49w5a 8n wyzn0+r:tuy floor to the fifth floor making no stops along the way has zero acceleration all the time.r zrwon 5 8n1:y paou:wdykt+e9g+j40

  A rolling ball moves f/gk (hyn h,b 3d9o4ivz8b4evirom $x_1=2.0 \mathrm{~cm}$ to $x_2=-8.4 \mathrm{~cm}$ during the time from $t_1=2.7 \mathrm{~s}$ to $t_2=5.3 \mathrm{~s}$. What is its average velocity?  (数值)  $cm/s$ (only fill in numerical value please)

  A particle at $t_1=-3.5 \mathrm{~s}$ is at $x_1=2.9 \mathrm{~cm}$ and at $t_2=3.6 \mathrm{~s}$ is at $x_2=7.3 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight compl3wfw s3).)kt1xqkxafyj2j, s ete laps around a quarter-mile ($1 \; mile = 1609 \; m$) track in a total time of 8.0 min. Calculate (a) the average speed  (数值)  $m/s$ and (b) the average velocity    $m/s$

  A horse canters away from its trainer in a straig mn;bvfexm i;* h36uu1ht line, moving 116 m away in 8.7 s. It then turns n*e;hbu x36mm vufi ;1abruptly and gallops halfway back in 4.5 s. Calculate (a) its average speed  (数值)  $m/s$ and (b) its average velocity  (数值)  $m/s$ for the entire trip, using “away from the trainer” as the positive direction.

  A car accelerates fro,cu3.p 1jj4dm7 mphbwm $13 \; m/s$ to $24 \; m/s$ in 4.9 s. What was its acceleration?  (数值)  $m/s^2$ How far did it travel in this time?  (数值)  $m$ Assume constant acceleration.

  A car slows down from u fmpt3a87+h isv)+uz $18 \; m/s$ to rest in a distance of 63 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reach arhuj9o(:z(nzm-nyq8ur g8*j + jl.d h speed of $28 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $2.3 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinter can bur 2yr*k8r ,:fch h7paw6 emrvx9jpv7k.st out of the blocks to essentially top speed about7r,8v r: fye2phcv jka9. 6xrw*p7khm $10.4 \; m/s$ in the first 15.0 m of the race. What is the average acceleration of this sprinter?  (数值)  $m/s^2$ and how long does it take her to reach that speed?  (数值)  $s$

  A car slows down uniformly froi+ +/cr zgla7v t48mbam a speed of $20 \; m/s$ to rest in 4.41 s. How far did it travel in that time?  (数值)  $m$

  In coming to a stop, a car le, 9bn4qe um/coeuok:/ aves skid marks 92 m long on the highway. Assuming a deceleraoke qme,u9 nb/:/ ocu4tion of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck goi3/lqja6qd- gwx;d5dt ng $25 \; m/s$ on the highway. The car’s driver looks for an opportunity to pass, guessing that his car can accelerate at $1.0 \; m/s^2$. He gauges that he has to cover the 20-m length of the truck, plus 10 m clear room at the rear of the truck and 10 m more at the front of it. In the oncoming lane, he sees a car approaching, probably also traveling at $25 \; m/s$. What is the closest distance of the approaching car that he can still sately make the attempt to pass the truck? (without hitting the approaching car).    $m$

  A runner hopes to complete the 10,000-m run in 4wv) v+65;tfhzd ccav less than 30.0 min. After exactly 27.0 min, there are still 1100 m to go. The r6vhazw4vvtcd)f+5; c unner must then accelerate at $0.20 \; m/s^2$ for how many seconds in order to achieve the desired time?    $s$