Suppose that an object travels from one point in space c lfva+.o7ry9to another. Make a compa yaco7l+rfv .9rison between the displacement and the distance traveled.

  When is the average velocity of an object ,:tyyfm09 mjc m;l 0kxequal to the instantaneous velocity?

  A new car manufacturer advertises that theiry q7 ee2emcp)z f62d5c car can go "from zero to sixty in 8 s". This is a description zemccfy2e q2e657)p dof

  An object moving in the ;uut * :8oujnmahk*1: q0ddus.f6vov +x axis experiences an acceleration of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to the East (+x direction) vz eypyruhsud87n*m +*s +;.e begins to slow down as it approaches a traffic light. Make a statement conce z.+ep*+ye *;usdnryv 7h8musrning its acceleration.

  Suppose that a car traveling to the West (: 0rs nfzl 4u8us yts+vdd5*d)-x direction) begins to slow down as it approaches a traffic light. Make a statement conce )l8vsnt4sd*s 5f dyd+ zr:0uurning its acceleration.

  Suppose that an object is moving with a constan3sxzz , hjsrxf3 f;k-o9hj6n+t velocity. Make a statement concerning ; ,xs3o3nxsh9 fk h6zjf-+rjzits acceleration.

  If the velocity of an object is zero, does it mean that the acce9dnb)4k1tvb-.ul-yf 1c b xokleration is zero? Support your answer with an exam ukfl x-)oyt4bb9k- .dvb n1c1ple.

  Can an object's velocity change direc1jky r, zz/om3tion when its acceleration is constant? Support your ansz3y1rom/j, z kwer with an example.

  Suppose that an object is moving with constant acceleration. Macslxl3 ,osz *yu36vp7ke a statement concerning its motion w6vo*,u7s3 zpsc3yx ll ith respect to time.

  Can an object have increaskj.-2uxsmb /i ing speed while its acceleration is decreasing? Support your answer with xujiksb2/m .- an example.

  Suppose a can, after an initial kiy9wvg knhp+ l 9ewpsa.,8us+,ck, moves up along a smooth hill of ice. Make a st+euwsk yps. g9v,, lahpn9+8watement concerning its acceleration.

  Under what condition is average velocity equal to the average of the x;k+khsi13 j 1oc ktzvly5+l)object's initial and f1kszl ot5vjcikk1 y) +3lxh+; inal velocity?

  Objects A and B both start at rest. They both accelerate at the same rate. H (u;-,:x jbvpm.j7vlg y8qn vdowever, object A accelerates for twice the time as object B. What is the fin u l;pj8ndjbvv7.xv,y:gm-q (al speed of object A compared to that of object B?

  Objects A and B both start from rest. They both accelerate atcodg/z-qftv4- 5sw. m the same rate. However, object A acv4/q gscwt .d-5zo-mf celerates for 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 frict );pd ydo1m9livh; 2veion, which of the following is true concerning its moti92iohmy1d)d;ve lv ; pon?

  When an object is released froci 8c p69c9 ck/dlte5tm rest and falls in the absence of friction, which of the following is true concerni ld5e6899tcc ct/icpk ng its motion?

  Suppose a ball is thrown ykz2q5dd0ej +/qtv+k1nco q5 i8w 6aqstraight up. Make a statement about the velocity and the acceler8 0 dt kj+qe/+1k yva5zdn 6wq52qcqioation when the ball reaches the highest point.

  Suppose a ball is thrown straight up. What is its acceleration just before it r1cjlg *9m7o.*v h05 lwcjkp aieaches itso0cmhkp ajw7jc *gvlil9 1*.5 highest point?

  Suppose a ball is thrown straight up, reaches a maximum height, then falls to:hb h-)2zqm md2/1hpvi:fkkd its initial height. Make a statement about the direction of the velocity and acceleration as thk:b/hm 1viz)m 2-q2:dhfhdp ke ball is going up.

  A ball is thrown straight up, reaches a maximum height, then(j; m2m 7f aonwx5uoo/ falls to its initial height. Make a statement about the direction of the velo unw(f 5;joa/m o7omx2city and acceleration as the ball is coming down.

  Suppose a ball is thh jhcgtr :r:a,e e mpf;4.w)r+/txdj 4rown downward in the absence of air resistance. Make a statement concerem/:r.cdpt;w hhjr44 f+j rxae:)t ,gning its acceleration.

  Suppose a skydiver jumps from a high-flypq79*t aby0u; )g:lrzwg jm8,s/yyy ying plane. What is her acceleration when she she reaches terminal vey wyalysy7:)g ry8zqb,09*g /p jum;tlocity?

  A ball is thrown vertically upwy,p*lk*uy4*ozi1x t tard with a speed v. An identical second ball is thrown upward with a speed 2v (twice as fast). What is the ratio of the maximum height of the second ball to that of the first ball? (How many times higher *y*kyl ttz 4uo ,xpi1*does the second ball go than the first ball?)

  Ball A is dropped from the top of a building. One seco ab; 9*)sc;d1h,hrkgdycet3y,l:q n fnd later, ball B is dropped from t; dl*9 3ycstb qae;,dg) ry:cnf, 1khhhe same building. As time progresses, the distance between them

  Ball A is dropped from the top of a building. One second later, bxamyuc6(t- zi /uv2;nzy (xv )all B is dropped from the same building. As time pro 6/nyu xt-)(vx(va muc;izy2 zgresses, the difference in their speeds

  Two objects are thrown from the top of a tall building. One is -bn i) 9hi6):wqjza-qym 4m59 -dlftixmz dg1thrown up, and the other is thrown down, boim9-b jdw9d ziq46 1ytin-l -qx 5):g hz)mamfth with the same initial speed. What are their speeds when they hit the street?

  A brick is dropped ffiq xeiy0tb/7yh+ o/ )rom the top of a building. A second brick is thrown straight down from the same building. They are released at /f7)0h+b i y q/ityoxethe same time. Neglect air resistance. Compare the accelerations of the two bricks.

  An object is moving with constant non-zero velocity in the +x axis. The posit0w h;6g4bs0w eldp5 toion versus time graph of thi5t;wl0o bgd60e4phws s object is

  An object is moving with constant non-zero acceleration in the +x axis*u) e touee*;w8 pyt,d. The position versus time graph of this objew u*e ep8dt*)ue,to ;yct is

  An object is moving with constant non-zero velocity in the +x axis:ynnb z5 yafs *g.y0+l. The velocity versus time graba:f+y0 gyn.*yz5s ln ph of this object is

  An object is moving with constant non-zero acceleration in tji (g.*nl(nkw8grsqo 5t k;8zj 2:gjd he +x axis. The velocity n8 itj( wsz2j:lk .* (gjd5ng;qgok 8rversus time graph of this object is

  The slope of a position versus timens5b prg: v8q; smgzd+y8.v1n graph gives

  The slope of a velocity versusfhmd( (gt w/v4 time graph gives

  The area under a curve in an acceleratio4.7i9zvxs2 tnveid z1n versus time graph gives

  The area under a curvusf)j7 qtts-z)-2k hw g,sad5 e in a velocity versus time graph gives

  If the position versus time graph of an object is a horizontal elp6j 6 t0pfn 4gyi j5 b02li:uy+gwi,line, the object ipulgeji6t 52ij0gw40:,f+ip y 6b ynls

  If the position versus time graph om q1,;fypf ;fw9 cl.hvf an object is a vertical line, the object ism9 ly.1 vw, fpchfqf;;

  If the velocity versus time graph of an object is a a 40ze drl hcf4ad/qlejzu7md-).( 1hhorizontal line, the object is jm4hdacle(-7r dzhlu4)a0d/ q ef1z.

  If the velocity versus 9qo*kt1w1tm+ wga bu(time graph of an object is a straight line making an angle of 30 degrees with the time axis, the bo1twa9(*u k wmq g+t1object is

  An object moves 15.0 m north and then 11.0 m kt r2*7i v3 wdqy5hngd)w vxs. 5j-r3asouth. Find both the distance traveled and the magnitude of the displacementj*25g.s5yaqrwi t73d3 w- kvhxr dn)v vector.

  A boat can move at 30 km/h in still water. How long will it takejkp q)o t/nrfi/ ;4hs2 to move 12 km upstream in a river flowing 6.0 km/hqsjrhtp; o 2i/fn) /4k?

  55 mi/h is how many m/s? (1 mi = 1609 m)a +vdzpnf8/+r:q-4d pheqo;d

  What must be your average speed io;x f6;bs j*i-isswvghq (x4 +n order to travel 350 km in 5.15 h?

  A runner ran the marathon (approxim3 z 9io(70fnmc wleipj:9ote+ ately 42.0 km) in 2 hours and 57 min. What is the averag eieimjnp+ 7z0lco9t9:( fwo3e speed of the runner in m/s?

  A car travels 90 km/h. How lonhc74 (nfsym.bu 0bbqld2i mp 9l..ic.g does it take for it to travel 400 km?

  A ly (light year) is the distance that light travels in one year n oyn yx*2;c82ousu-w,w nl*7 ich5le. The speed of lo*8s wic2;2-*n ,y7x n5h lunyw ueoclight 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 alon0l n f0y fpwfon;a ;fvd: kly kpd,2n*mo.e1,1g a straight road and you look to the side for 4.0 s,no 1;n:lyf 0ye,pd1;n2 fdok0pkav,lf*wf .m how far do you travel during this inattentive period?

  If you run a completeb+vm p6h(pgyceu 62g; loop around an outdoor track (400 m), in 100 s, your average (+c ;g2 66pemvhbuypg velocity is

  A polar bear starts at e:qx zz;5fda)xb,if 6*wnwo* the North Pole. It travels 1.0 km south, then 1.0 km east, then 1.0 km north, then 1.0 km fz 5b6oax*w)nfxiwz:q;*e , d west to return to its starting point. This trip takes 45 min. What was the bear's average speed?

  A polar bear starts at the North Pole. It travels g)(lo mckaci- d std9a07lg45 1.0 km south, then 1.0 km eas9- o57kdas)imt0 aldgg(4l cc t, then 1.0 km north, then 1.0 km west to return to its starting point. This trip takes 45 min. What was the bear's average velocity?

  You are driving home on a weekend from school at 55 mi/h for 110 miles. It th8o ; jxk-zpcv4en starts to snow and you slow to 35 mi/h. You arrive home after driving 4 hours and 15 minutes. How far is your homev pk4jcxz;-o8 town from school?

  A motorist travels 160 km at 80 km/h and 160 km at 100 km/h. w3l5:*lf)manybawd * What is the average speed of thml5bw3dn:w *l fa ya)*e motorist for this trip?

  A motorist travels for 3.0 h at 80 km/h and 2.0 h at 100 km/h. 2cl wtk;+fih mz +:w qj,w/r7uWhat is her average spkl++ riz2m;j /,c wuw fh7tq:weed for the trip?

  An airplane travels at 300 mi/h south for 2.00 h4xi)n a ,ats5f and then at 250 mi/h north for 75s)5a in,aftx40 miles. What is the average speed for the trip?

  In a 400-m relay race the anchorman (the person who q cv4 ln94m4zc ry*g9truns 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 the race, in order that the team A runner not lose the race?c 499cz yrm44vlngtq*

  A car decelerates unifcfe5do9wl +w;cv2z2n/uvsn) ormly and comes to a stop after 9 s. The car's average velocity du2nocv )9w +wsuv52e znlc;d/ fring deceleration was 70 km/h. What was the car's deceleration while slowing down?

  An airplane increases its speed nhv um y1a2j/(from 100 m/s to 160 m/s, at the average rate of n1vjam( y/hu 2$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h accejwta ( tz-i72ulerates at 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 ;ep:9 lhi vxja/r3+ki+pj1c f and 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 t*mu : 2c-rr bqze)ld2og)mu6ehen speeds up with a constant acceleration el* ):rmcb-6z 2uoder g2 qmu)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 6.7 m/s experi xqnmach550v8kz )f w(ences a constant acceleration of q5)fm5 n cka0wxhvz8($4.4 \; m/s^2$. What is the cart's displacement during the first 6.3 s of its motion?

  A bullet moving horizontally to the right (+x direction) with a speed of 278 m-m 1rf3c5txw h/s strikes a sandbag and penetrates a distance of 54.35 cm. What is the average accelem3f r 5ctxhw1-ration, in $m/s^2$, of the bullet?

  A jet fighter plane is laun;l50a p 1bdpaoched from a catapult on an aircraft carrier. It reaches a speed of 42 m/s at the end of the catapult, and this requiresl o bpa;15p0ad 2.0 s. Assuming the acceleration is constant, what is the length of the catapult?

  A car starting from rest moves with constant acceleratic ibtgc n-(x86on of $2.0 \; m/s^2$ 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 of 200 m. What is its average a0e.x l/wckgk*t.zc d-ccelere .t*/zc-0dlk kcw. gxation?

  An object starts from rest and undergoes uniform acceleration. Durindimz9 5dw5 y,;yqnw-ig the first second it travels 8.0 m. How far will it travel during the th-,yqyd5 im9d n5;wiwzird second?

  An object is moving in a straight line with const3m gf ,q9vu f )mbx1cp,fj8k2rant acceleration. Initially it is traveling at 16 m/s. Three seconds lab,q9xf pm m,r1uf j83 k2g)fcvter it is traveling at 10 m/s. How far does it move during this time?

  A car starts from resobw 01m ek4n qnre/.hjn.w1.st 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 ip0 /; v).p6 ,aepch-molyavq dry 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 that has been wq nxnv+n*uv)3 aiting at the intersection starts ahead with a constant accenvxq* unn3 +)vleration 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 tl;peq, p15i rpdqo+m0k -qy 8lhe surface of planet X where the acceleratiqmqdlo8 pi;-lq,0 yr5kp1 +epon due to gravity 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/ht)a;2je2),j fdhu nls on the surface of planet X where the acceleratilea)j; duf)hn2jh2, t on 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 upwar/i7uhfn+2l8f5 lcn tkd with a speed of 15 m/s on the surface of planet X where the accel7l cfu/8+ 5knil 2fhtneration due to gravity is $2.5 \; m/s^2$. How long does it take for the object to return to where it is thrown?

  An object is thrown upward with a speed of 14 m/s onqbl sh4vpv+4 d:56ej v the surface of planet X where the accvp 4+b5v6dql:vhje s4 eleration 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 greater than 0.10 s. If yn k8 fou i8eaob2r4z7:g9wk 4bour friend holds a ruler between your fingers and releases o 8 4wezkb47bk:iuf2ro9 8ganit without warning, how far can you expect the ruler to fall before you catch it?

  A ball is thrown upward at a velocity of 19.6 m/s. What is its velocity afnn0j :w(ib27r 2bmh sqter 3.0bw72m(s 2brin 0:qjhn0 s?

  A bullet shot straight up returns to its startinu.28m1 lowp l/ qb)isdg point in 17 s. What is the in2q d.w/8l umpi)sb 1loitial speed of the bullet?

  A ball is thrown straight up with a *dx t4,sqkm:01prwswspeed of 36.0 m/s. How long does it take to return to p1rdk04wtwqm,s*s :x its starting point?

  A ball is thrown downward from the top of a building with an initial sp*mvkp4:j) thdoro ): .u pgp6teed of 30 m/s. It st rd4gt t:o)o j*p.6mukp :)pvhrikes the ground after 4.5 s. How high is the building?

  A ball is thrown straight up with k7 :)ge*c oekya speed of 30 m/s. (only fill in numerical value in the blanks)c k)o gk*7ey:e
(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 straiawa(hit,nm 3oay.3w5ght up into the air with a speed of 47.3 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 3 seconds later.  (数值)  $m/s$
(e.) Determine the time at which the ball pass a point 15 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 15.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what is+-w2ku2jezrmkc 7 7wkx vw*7r the velocity at t = 1.0 s?

  In Fig. below, what is the velocity at t j8,l ta3enj4pi q*se1 = 2.5 s?

  In Fig. below, what is the veloci 8fu/ zzn/y 75x0.s7vouaxosxty at t = 4.0 s?

  In Fig. below, what is the 6iz;i ;kmo+ edvelocity at t = 5.5 s?

  In Fig. below, what is the average velt3a6*i,eochn 1 xzx 0docity from 0 to 4.0 s?

  In Fig. below, what is the average velocity fromsxb5 nghblqk a c*;6me*:nz0( 0 to 6.0 s?

  In Fig. below, what is the acceleration at 1/i , dbvu6oo.o.0 s?

  In Fig. below, what q9/7 wn3 svc. verz+pbis the acceleration at 3.0 s?

  In Fig. below, what is the average acc3zt/b4dcg.9k;w uzph azh 3:m eleration from 0 to 5.0 s?

  In Fig. below, what is the average accelj9lba3 -q4i d7hm4y dberation from 0 to 8.0 s?

  In Fig. below, what is the displacement from 0 to 8.fo/tqn7/z 5btv*yb+ u0 s?

Does a car speedometer measure speed, velocity? {/ o .fva lz4ky6ws*mc8speed|velocity}

  An object can have a varying speed if its velocity is cjjzsbgo(eh/ e:4z+ b;onstant.

  The velocity of an object can be j) 9ye4jv 4ieijs ,0bqnegative when its acceleration is positive.

  If one object has a greater speed than a second object, the first must havjx9atdxx 6 ))9 u,jfz+-v noooe a greater9un z d-xjt9o)oj)f, xv+ox6 a acceleration.

  Two cars emerge side by side from a tunyo-iqc /k(*djos6/me nel. Car A is traveling 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 uyqe/f9t/0f* q*xlx z acceleration decreases.

  A baseball player hits aq.w qv3q9t4 bu foul ball straight up into the air. It leaves the bat with a spe q.39tuvbq 4wqed of $120 \; km/h$. 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 object speeds up, what is happening to it wqvhj) c(+1mus acceleration, how does it change if air)( 1qhmw+jvcu friction is ignored?

  As a freely falling object speeds up, what is happening to obg 799kd1uwu )jz g8r.dw ig0its acceleration, how does it change if air friction CA w gzju0)18dgd7k. bw og9u9riN NOT be ignored?

  An object that is thrown verti/8fau,uxao2 ocally upward will return 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 raa/o of ux,28uesult be altered?

  An object can have zero velocity and nonzero acceleration at the sg)v9sw uv/ea6bqj, b5ame time.

  An object can have nonon-f+w) /br uet4t56 seuaei(zero velocity and zero acceleration at the same time.

  An elevator moving from the sec:e + wn8crm+a/nh /triond floor to the fifth floor making no stops along the way has zerorc /i+an+rw /meh8: tn acceleration all the time.

  A rolling ball moves tc q8.y rgi*e*from $x_1=1.8 \mathrm{~cm}$ to $x_2=-7.5 \mathrm{~cm}$ during the time from $t_1=1.9 \mathrm{~s}$ to $t_2=5.9 \mathrm{~s}$. What is its average velocity?  (数值)  $cm/s$ (only fill in numerical value please)

  A particle at $t_1=-3.7 \mathrm{~s}$ is at $x_1=2.7 \mathrm{~cm}$ and at $t_2=3.9 \mathrm{~s}$ is at $x_2=7.7 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete +pz-sqt2q5* e.gj64vfgq hevcm 1r0d laps around a quarter-mile ($1 \; mile = 1609 \; m$) track in a total time of 8.2 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 strai 9a8 zvfajr3-5i b yuool1lb;+ght line, moving 92 m away in 8.7 s. It theua ;8+ol3j v51rozflby-b a9in turns abruptly 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 from n q6.hzpff1w)a8llvcsp, nvk*:3ui* $11 \; m/s$ to $24 \; m/s$ in 4.5 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 fro tvk94w.loe5em $19 \; m/s$ to rest in a distance of 65 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reach a spee 9cps *ix gn/l0wni/p0d of $30 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $2.1 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinter can burst out of the blocks to essentially tog btw9hsls :;7 3j:ypsp speed abou3:t pb ;l hgs7wys9:jst $10.0 \; m/s$ in the first 14.9 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 f 6.zo d*t3a(nrj elgs*rom a speed of $16 \; m/s$ to rest in 5.27 s. How far did it travel in that time?  (数值)  $m$

  In coming to a stop, a car leaves skid masiwy;u ex w*87iwi. s2rks 92 m long on the highway. Assuming a deceleration o; w* xe7w28iwy u.iissf $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck going xzd4u+3i 1d ks08lmohmk+w-v$25 \; m/s$ 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 less than 30.0 min. After exactl8xm2lc*j pi8 dy 27.0 min,8pid xcljm28* there are still 1100 m to go. The runner must then accelerate at $0.20 \; m/s^2$ for how many seconds in order to achieve the desired time?    $s$