Suppose that an object travels f2+6np; plms se7pcw:zrom one point in space to another. Make a comparison between the displacement and te pl+6sczp:s 72;mpnw he distance traveled.

  When is the average velocity ofqjlv, 8dht39lotd. h : an object equal to the instantaneous velocity?

  A new car manufacturer advertises that their car can go "fr qi7mc znihlkr9;;+b2 om zero to sixty in 8 s". This is a 2 9i;hlcz+irkqbn ;m7description of

  An object moving in the +x axis experiences an accelerat+3kyu*ve3zs a c 1w*-yiq0qfo ion of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to the East (+x dire: ,w egy.+u k;tu9ohhdction) begins to slow down as it approaches a traffic light. Make a statement conhuweutgky :;. d,ho9+cerning its acceleration.

  Suppose that a car traveling to the West (-x direction) lo8u cy x2;8e7:jm1lad ,ece abegins to slow down as it approaches a traffic light. Make a statement8l a8m,xc7e 1aod;ecy j: 2eul concerning its acceleration.

  Suppose that an object is moving with a constant velocity. Make a statement c u:l --,69q/btmqwpcnnu b l9woncerning its acceleratiu- /,mq6b-n :l wlub9cpqt9w non.

  If the velocity of an object is zero, does it 4cexlq wa, /n sr)d a)be)4t(smean that the acceleration is zero?s)nwd)qtea,4 xble a) c4rs/( Support your answer with an example.

  Can an object's velocity chane eoqd(,.qr/ zn1 px bm7 fc0szt*9xm:ge direction when its acceleration is constant? Support your answer with an example.(t zsd e:0pxrx,c n*m7m/ eqz19bo fq.

  Suppose that an object is moving with constant acceleration. Maken)8nn1bxj ll 1 a statement conce8n1n1j) nl xlbrning its motion with respect to time.

  Can an object have increasing z-b4 tz4e:v*uc t7nthspeed while its acceleration is decreasing? Support your an4*4 zt tuevnc :7hbt-zswer with an example.

  Suppose a can, after an initiintb l3,c 5jl)al kick, moves up along a smooth hill of ice. Make a statement conce 5ni,lbc) 3jltrning its acceleration.

  Under what condition is average velocit 3ikm kj;zdlh/;e1h-i y equal to the average of the object's initial and finh3m k;;ii dklhe1/jz-al velocity?

  Objects A and B both start at rest. Theykb,y8hxz;8//0o vgq (u1w n nutqx po* both accelerate at the same rate. However, object;gv8 n*oxu,bqunowy z(/ t 01kpqx/h8 A accelerates 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 reswt*q jrhpa1 n(t43zn 5t. They both accelerate at the same rate. However, object A accelerates for twi5ahz 3j( q tnw1r4pn*tce 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 frictio w0wznbb .g wa4f g-53t2bmf-yn, which of the following is true concerning its motionwnbmggf4by-wb-tz52.f 30a w ?

  When an object is release +gmnq.b a.h2dd from rest and falls in the absence of friction, which of the following is true con.bnqdag . h+2mcerning its motion?

  Suppose a ball is thrown straight up. Make a statement about the velocity andqh3,/.pck ism the acceleration when the ball rea/i, khsm3c pq.ches the highest point.

  Suppose a ball is thrown straight up. What is its acce xpy8papm ./y(leration just before it reaches its highest point y8pmp a(p/xy.?

  Suppose a ball is thrown straight up, reaches a maximum 7x g9lm,ew 6whheight, then falls to its initial x e6h9w,wml7g height. Make a statement about the direction of the velocity and acceleration as the ball is going up.

  A ball is thrown straight uc e l7h(d(k*emiul 9(rp, reaches a maximum height, then falls to its initial height. Make a statement about the direction of the velocity and acceleration as the ball is coming dowllhed rk ( cum((97ie*n.

  Suppose a ball is thrown downward in the absence of air resistabr4kel8-r/ ukrl*s( u8se 8zdnce. Make a statement concerning its accelerationderl (88 zusuk*s8 /le-rk4 rb.

  Suppose a skydiver jumps fm ri;r5,w;tz o 3ng:ylrom a high-flying plane. What is her acceleration when she she reach3 w:5y ,mtilrrgo;n;zes terminal velocity?

  A ball is thrown vertically upward withb3 .l bo w1ywy8igtk/4 a speed v. An identical second ball is thrown upward with a speed 2v (twice as fast). What is the ratio 3b4k8 l1/wy ibotw.gyof 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 n z jqma8;zgf /+7o0-7bot zvrof a building. One second later, ball B is dropped ozav7j gfn0zz7to/; 8+qb-m r from the same building. As time progresses, the distance between them

  Ball A is dropped fro-nub2h7;ie.i5subcag 0 e1:ee laq n :m the top of a building. One second later, ball B is dropped from theelhncin;g : si ueu- 07e5.1:2baea bq same building. As time progresses, the difference in their speeds

  Two objects are thrown from the top of a tall buig-;uq o;:6 t)igtme . 2rs6wcpjl bm1slding. One is thrown up, and the other is thrown down, both with the same initial speed. What are their speeds when they hit the strjmwgcst;rembu2.16s:i6 lpq;t) -go eet?

  A brick is dropped from the top *5 r g y/hdzoynvt,+2srt ,pc1of a building. A second brick is thrown straight down from the same building. They are released at the same time. Neglect air resistance. Compare the acceleor pgy1 ,d/r cthy*5+2svz tn,rations of the two bricks.

  An object is moving wituzw7- jpzyf ,)h constant non-zero velocity in the +x axis. The position versus time graph of t7 zuw-fy,) jpzhis object is

  An object is moving with constant non-zero acceleration in the +q9kgb/cc a p87x axis. The position verbk /978ccpaq gsus time graph of this object is

  An object is moving with constant non-zero velocity in the +x2ec56+)l r0bgxjudh-a rxt.m+ w-utrii r- 9u axis. The velocity ver-0r-crh+ 5r.xltt u) ui6+u -ragxij2 wb em9dsus time graph of this object is

  An object is moving ja ;o95c2w 4y pg9ulbhfmg0ud(qm .v)*h dzd7 with constant non-zero acceleration in the +x axis. The velocity versus time graph of v;hu4ddom*9l fh.2y7 cwu 5a g9b zg(mpjq)d0this object is

  The slope of a position vu 5f i :vp0p/- krhjnjrl-*t4kersus time graph gives

  The slope of a veloci:tz hhv6ed4 y0ty versus time graph gives

  The area under a curve in an acceleratlc(am+..uss n ion versus time graph gives

  The area under a curvpeeq5vv *tz:2 +yp4u ne in a velocity versus time graph gives

  If the position versus time graph of an object is fr(7 -4ek3,, y+ky0gydxai t yrkb:lfa horizontal line, the object iyxdbe-+y0: kiayr3ft (g4 ,7 fk,rkyls

  If the position versus time graph of an object isjfq* ,xuf zsgb97: u6d a vertical line, the object is,97*fzjd 6 :bsx fugqu

  If the velocity versus time graph of an object is a horizontal line, t(at t-eh3.bc.w- igx nuv5c+vyke*( hhe object is3e5hvat(*. gxkcy+c(nv eb- w-u i.th

  If the velocity versus time graph of an object is a straight line *oigy2;th*hemaking an angle of 30 degrees with the time axis, the to*hh*e iy2g; object is

  An object moves 15.0 m north and then 11.0 m south. Find both the df fbbi .u muf+ezs) 9.l*7obw5istance travelezobfes7 fuu+m b fil*9.5)b.wd and the magnitude of the displacement vector.

  A boat can move at 30higv qfmsg)z 08mq sk ) ln0,d331n:dq km/h in still water. How long will it take to move 12 km upstream in a river s)qgnh03:n3 )8m gifq ,kzdsl m1dq0vflowing 6.0 km/h?

  55 mi/h is how many m/s? (1 mi = 160j j7ex*a1vh8v a1,4yva5brq r e0m,v4lunhx7 9 m)

  What must be your average speed in order to traadh dig2,(r3p vel 350 km in 5.15 h?

  A runner ran the marathon (appbjnh.; g4ug7 8kk6woy*uy ci(roximately 42.0 km) in 2 hours and 57 min. What is the avernoy 48 6h(ik*ujgw7ygbc. u k;age speed of the runner in m/s?

  A car travels 90 km/h. How long does it take for it to travel 400w( 2-2x(c4qnhcy+n s o/b,iub zmgng) km?

  A ly (light year) is the distance that light travels in onhc2coq 3ju gf-,z/n f9e year. The speed of light iu,c2cnqz /h-o9g3f j fs $3.00 \times 10^8 \; m/s$. 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 l jhywn,kuv m7v+:2;nside for 4.0 s, how far do you travel during, + l ;mjn:knvyh72vuw this inattentive period?

  If you run a complete loop around anusowf-: r)k q27-ftxy outdoor track (400 m), in 100 s, your average velqr-os-kfw2ut:y)x f 7ocity is

  A polar bear starts at the North Pole. 1q t +f3+hz2mkj-aedv 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. Tha1t qjh-mfvk3+2d+e zis trip takes 45 min. What was the bear's average speed?

  A polar bear starts at the Nf5 ozbp:kq9*9cc 4wv zywqt31 mzd:o (orth Pole. It travels 1.0 km south, then 1.0 km east, then 1.0 km north, then 1.0 km west to return to1 (9db zyo*ftkmq:5vz4q:w9 cwz3poc its starting point. This trip takes 45 min. What was the bear's average velocity?

  You are driving home on a weekend froml t(+lew9jn(m school at 55 mi/h for 110 miles. It then starts to snow and you slow to 35 mi/h. You arrive home after driving 4 hours and 15 minutes.((wt+el 9m njl How far is your hometown from school?

  A motorist travels 160 km at 8)vsh c,hel+cg: 0ym 5o0 km/h and 160 km at 100 km/h. What is the average speed of the motorist for t, +sc0v hhcgo)y l5e:mhis trip?

  A motorist travels for 3.0 h at 80 km/h and 2.a/ 5.q4y wibtr+h q1gt0 h at 100 km/h. What is her average speed fort .r+iyh514a/ gqw tqb the trip?

  An airplane travels at 300 mi/h so-tql- m -n0opduth for 2.00 h and then at 250 mi/h north for 750 miles. What is thedptn ql-0-- mo average speed for the trip?

  In a 400-m relay race the anchorman (the person who runq-0uhy ahi7sud:6/h7wv bo4 v s 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 h ua7uvyd/wh i-4ohb 6 s0qv7:of the race, in order that the team A runner not lose the race?

  A car decelerates uniformly and comes ti. cll*gjuop)7-dh 95+s zcr yo a stop after 10 s. The car's average velocity during deceleration was 70 km/h. What was the car's deceleration while sl.+5*orh zpydic lu7- lgjs9)cowing down?

  An airplane increases its speed from 100 m/s to 16zass) 2ik*-xo 0 m/s, at the average rate of )xsz2ios k- *a$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h accelerates azdax h 88n7z0k9jm4n g+p)m kat 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 and acceleranna:;lx e)b(jv k8s( ytes 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 hjv5v27,+ f,e kvu) ad;b0 5evl vnabvfor 10 s. It then speeds up with a constant acceleration ,dbkv+je) 0h; vfvava lve, b5 27uv5nof $2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial velocity of 5.6 m/s experiences a constant acckytf)ujn 1 bh04:+lt 2xun z,oeleration ou2un:4 l)+f ho1t0kxj n,ytzbf $3.3 \; m/s^2$. What is the cart's displacement during the first 7.0 s of its motion?

  A bullet moving horizontally to the right (+x direction) wit u8tc+oo kf 44txg.c*sh a speed of 385 m/s strikes a sandbag and penetrates a distance of 79.87 cm. What is the averago*c 4gkxtto4.8f u+sce acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is launched from a catapult on an aircraft cv9al/)l h n kywq)k/7marrier. 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 the length of th7qk ) /w)naly/ lvhmk9e catapult?

  A car starting from rest moves with constant accelerationi0z8u s geme35 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 distanrt, )p0z ;ga w:il3kotce of 200 m. What is its average acce)alr:o 0w ;k p3tg,ztileration?

  An object starts from rest and undergoes uniform accelerationu+* vb*2pku k8r3 wvmf. During the first second it travels 2.8 m. How far will it travel d8* mkvfp u+ *wbk32ruvuring the third second?

  An object is moving in a straight line with constant acceleration. Initially tur7j8--px4e f z3e.u js3jaiit is traveling at 16 m/s. Three seconds later it is traveling at 10 m/s. How f3jjip37.x-ur4fe e-tu ja 8zs ar does it move during this time?

  A car starts from rest and accelerates unif01j/ 40n gu4az2rx ;mbfgag-sqaq :frormly 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 road ca.zw.goru 3pg; n 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 lig.l 0(lnlsbem+ls:( r qht turns green, a car that has been waiting at the intersection starts ahead with a constant accm:l r0. esbs(qll+nl (eleration 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 upw.83pkbspovk *ard with a speed of 12 m/s on the surface of planet X where the acceleration due tos3 bk*k.o v8pp 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/s on the surfacec 0jrj9pwh2 3q of planet X where the acceleratio9 2jrjq30c wphn 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 speed och1(aox tzk 0rf(x4l +f 15 m/s on the surface of planet X where ( afzkthco+ x1xl (r40the acceleration 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 spe1n/3wud(b - wop; ye g7kci6weed of 14 m/s on the surface of planet X where the acceleration du3 bp kow;ne-e1c/wd(wyg u76ie 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. Ifz.428:sgf ivg3uq wxd your friend holds a ruler between your fingers and releases it without warning, how far :w dg i24vqfu8gs.x 3zcan you expect the ruler to fall before you catch it?

  A ball is thrown upward at a velocity of 19.6 m/s. Wha-xfg 4gzc(34id +k; i1/j u3ifkhlnoct is its velocity after 3.0lkhff;xozucc (i/ +-13g g di43 k4jni0 s?

  A bullet shot straight up returns to its starting point in 19 s. What is the )/ql cg0y9 r )h/9 rpoqmpxcx;initialc0yqr l/)c 9/;q9xxpg mrpoh) speed of the bullet?

  A ball is thrown straight up with a speed of 36.e w:wz mmq0d78z;obh/0 m/s. How long does it take to return to its startidm7:8 zzqw;e0b wo/mh ng point?

  A ball is thrown downward kt09 )xk 1u rwfkuw0o ,ggs1o:from the top of a building with an initial speed of 12 m/s. It strikes the ground after 6krguwu0f :k 1 o1,kw)s9gt0 xo.9 s. How high is the building?

  A ball is thrown straigh+ pcyivq s s;g 6/chqdpp:24h+t up with a speed of 30 m/s. (only fill in numerical value in is4 sc;q:6hd/hpy++ vc 2qgppthe blanks)
(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 yf xkzlb vr q6+8acwa/p 9h)q v*lz*.8up into the air with a speed of 34.9 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 1 seconds later.  (数值)  $m/s$
(e.) Determine the time at which the ball pass a point 13 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 13.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what is the i7(3w.,*uo t l vuunujvelocity at t = 1.0 s?

  In Fig. below, what is the velocitmhdn:b 47hou rj+k/- py at t = 2.5 s?

  In Fig. below, what is the velocity 8g(sieg56o09ll zut v qy ji(ig)ek ,7at t = 4.0 s?

  In Fig. below, what is ,cl 7iliv:2htthe velocity at t = 5.5 s?

  In Fig. below, what is the average velocity from 0 fg c ,5jkl+e.lip6yk6ua.3 2ol ywzi 5to 4.0 s?

  In Fig. below, what is te1 bv9mhaz *9the average velocity from 0 to 6.0 s?

  In Fig. below, what i:6;gsie7j w8 fzjem0 a8d +ssj8ytc+j s the acceleration at 1.0 s?

  In Fig. below, what is the acceleratf zv9p ;suex 8km cm;glb4:+:eion at 3.0 s?

  In Fig. below, what ic) xh( 1g(jiwds the average acceleration from 0 to 5.0 s?

  In Fig. below, what i.z socbco0m4( s the average acceleration from 0 to 8.0 s?

  In Fig. below, what is the dis2h(v u. /qclmd36rc jlplacement from 0 to 8.0 s?

Does a car speedometer measurlm/l(vkhz0ppaf1 ab 0anm .;+e speed, velocity? {speed|velocity}

  An object can have a varying spee,clp p *8ccu vk)4fk*fv*irw5 d if its velocity is constant.

  The velocity of an object can be n m5bw ldcln542egative when its acceleration is positive.

  If one object has a greater speed than a secom.2fgw mcha+;oi6 + f.f io(gznd object, the first must have a greater acceleratgci fm+2aohfi (wm. +zg6. ;ofion.

  Two cars emerge side by side from a tunn ikn3gge 6g)qjdx, +m/el. 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 inc-np -3xtd9muwu (5 te2o4lkjgreasing in speed as its acceleration decreases.

  A baseball player hits a foul ball straight up into the air. It leaves the batoc+qhso79 i y+ with a+ico 7 hso9y+q speed 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 its acceleration, h.ca0t /os;+vqc cmhp sm9 0v6how does it change if air frictioth0qams9 cv/ms0hco; +6 .cpvn is ignored?

  As a freely falling object speeds up, what is happkas*87 op3zdq2ac p( jjok*b 0ening to its acceleration, how does it change if air friction CAN NOT be ijpoo qbazp (j sk*2078k*ca3 dgnored?

  An object that is thrown vertically upward wilj+cq(u7x bkf)yuu f/+u q2bk-+ :fhowl 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 result be alteqyb72 f-u(u+x kf+cw+bf :uk j u)/oqhred?

  An object can have zero velocity and nonzero acceleration at rn:kl4qwgw b8 +9nwe6z4 c9zjthe same time.

  An object can have nonzero velocity and zero acce: ,5;rwlwixs hleration at the same time.

  An elevator moving from the second floor to the fifth floor making no stops a*djcbf1iq0 e o/70z e1*zaf yolong o00* z*jfyd1eci7foqze1b/a the way has zero acceleration all the time.

  A rolling ball moves fromne:s zcee+ )i8 $x_1=1.8 \mathrm{~cm}$ to $x_2=-4.3 \mathrm{~cm}$ during the time from $t_1=2.7 \mathrm{~s}$ to $t_2=6.0 \mathrm{~s}$. What is its average velocity?  (数值)  $cm/s$ (only fill in numerical value please)

  A particle at $t_1=-2.7 \mathrm{~s}$ is at $x_1=2.6 \mathrm{~cm}$ and at $t_2=3.7 \mathrm{~s}$ is at $x_2=8.3 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight com mom5/*m:ie cxi +ix23yes1cz plete laps around a quarter-mile ($1 \; mile = 1609 \; m$) track in a total time of 7.9 min. Calculate (a) the average speed  (数值)  $m/s$ and (b) the average velocity    $m/s$

  A horse canters away frlmpm w,+qnfn +1 kg:7tom its trainer in a straight line, moving 106 m away in 12.5 s. It then turns abruptlytngw1pl m+:,mkfq7 n + and gallops halfway back in 4.7 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 fromevfytmq6hvxmh enz/+;i 8 a+x(3a/5b $11 \; m/s$ to $25 \; m/s$ in 4.3 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 fromfwz -ef1kike8r5/v 4x $15 \; m/s$ to rest in a distance of 81 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reach a speed ak*i.hv k1z1jg.x, ezof $31 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $3.0 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinter can burst out of the bt(pum np:*p9 clocks to essentially top speed abou *u(ppm:n t9pct $10.1 \; m/s$ in the first 12.1 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 falc, (/l ,wsulgwmen;-u( w+ o1f6 p9h-uqbjerom a speed of $19 \; m/s$ to rest in 5.99 s. How far did it travel in that time?  (数值)  $m$

  In coming to a stop, a car leaves skid ma :+b)i6o atyy8yrqk p7rks 92 m long on the highway. Assuming a deceleratioyqb:t 6 iy8+rykpa7) on of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck 2mt4,.qv:wd 1m,s s uy+dxdcx going $25 \; m/s$ 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 comp:diy- :fr j8xolete the 10,000-m run in less than 30.0 min. After exactly 27.0 min, there are still 1100 m to d- fi ::8yxrjogo. The runner must then accelerate at $0.20 \; m/s^2$ for how many seconds in order to achieve the desired time?    $s$