Suppose that an object travels from one point in space to anoqi.h9 (q vg)u.(ue kpvther. Make a comparison between the displacement ae u9gpk.hu .(qqiv)v( nd the distance traveled.

  When is the average velocity of an object equal to the instantaneous velocityb qltvvz 44k(.?

  A new car manufacturer advertises that their car can go "from zero to sixty izq0,sje5jn)ts vp5 9fn 8 ss 5fjzj sn)0v9 tpeq,5". This is a description of

  An object moving in the +x axis experiences an aaj j fnoau,4 jy83a+/jcceleration of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling tfxcgg6c n(/) to the East (+x direction) begins to slow down as it approaches a trafftf/ng(cx) c6 gic light. Make a statement concerning its acceleration.

  Suppose that a car traveling to the West (-x directioz.sdqm ceg/k, 9it,1 nn) begins to slow down as it approaches a traffic lightk. n,19g ms i,e/qczdt. Make a statement concerning its acceleration.

  Suppose that an object is p3(opu y5oz3he0z. lnmoving with a constant velocity. Make a statement concerning(upye5l3o3n.zohz p0 its acceleration.

  If the velocity of an object is zero, doesm lr29g1 byw6e it mean that the acceleration is zero? Support your answer with an b erm6g91 l2wyexample.

  Can an object's velocity change-.ig,zdh;hqt ;,wyo 1bf zv+m direction when its acceleration is constant? Support your ansib vwmhtz f.qydo -z+,,h ;1;gwer with an example.

  Suppose that an object is moving with constant acchtmv+dl. 9y2 a+y tfm2eleration. Make a statement concerning its motion hfmd 2my +lt+92t.avywith respect to time.

  Can an object have increasing sp,o fzw1*fs uc/:y3uxn ze/huo0s1iq, eed while its acceleration is decreasing? Support your answer withixf*c1u f w3z/z / 1sneu:0 oo,usyh,q an example.

  Suppose a can, after an initihq: g uwv up8omx3w +egpj:52;al kick, moves up along a smooth hill of ice. Make a stamx+ev; :uwug5gphp8wq2 j o3:tement concerning its acceleration.

  Under what condition is average velocity equ3h *ovd+6v wsxuc (+1j7 watqyal to the average of the object's initial and final vw+xvtv sdqa1 3+ yuhc6*(j7owelocity?

  Objects A and B both start at rest. They both accelerate at the same ragxao8 ( -0u:urd:frwmgf-6euei d68 yte. However, object A accelerates for twice the time as object B. What is the final speed of object A compared to that8 yugwx :gid8(af0ef6-6urr:deou-m of object B?

  Objects A and B both start from rest. They both accelerate at the same rate)+6z n6vpaxa8laqrbv,0m l f ,. However, object A accelerates for twice the time as object B. What is the distance traveled by object A compared to tha,+ nml)0vxl, 66zarbfvpaa8 qt of object B?

  When an object is released from rest and falls in the absence of friction, mxwa.(-d/mcsfqd9 7 o, i 0prpv1bpv( which of the following is true concernin0pos,(bfvrx1(v -pi .q 9pc/d wa7 dmmg its motion?

  When an object is released from rest and falls in the /nw/xzn6f8j3bm g8ic)ym .nlj )* qwxabsence of friction, which of the following is true concermlwj)8qbm / )nj/ *w8zxxn ni3 y6f.gcning its motion?

  Suppose a ball is thrown straight up. txi3;ny3 0j-3gbs g yxMake a statement about the velocity and the ac;ggy 3jx niyx3 s-0b3tceleration when the ball reaches the highest point.

  Suppose a ball is thrown straight up. What is its ac8w ,ausft*pn f-n 8;whceleration just before it reaches its highest pt-u shfw *w8pf;n ,8naoint?

  Suppose a ball is thrown straight up, reaches a maxi vyq -hkz(4rph)c;h,smum height, then falls to its initial heigvk;q-zy ,rph4( cs)hh ht. Make a statement about the direction of the velocity and acceleration as the ball is going up.

  A ball is thrown straight up, reacxys d hrgpn.; ty900j8lcp/c )hes a maximum height, then falls to its initial height. Make a statement about the direction of the velocity an0jd)x09 ctgh . ps/c rp;yn8yld acceleration as the ball is coming down.

  Suppose a ball is thrown downward in the absence of air - vgx l2 (o) ml f2hvpz2:*ujzy3dl;d/ xgleh8resistance. Make a statement el*fg m z(3p2x/hvv jdxzo2gl :;)yl2ud8-lhconcerning its acceleration.

  Suppose a skydiver jumps from a higdu wau furf n*3 --i; t(nu(w3:4xjcoyh-flying plane. What is her acceleration when she she reaches terminal veuuotraf -: nu43diw;cx((wfy3u* j n- locity?

  A ball is thrown vertically upward with a speed v. An identical sec()l0 iraif-wk x-(zwv ond ball is thrown upward with a speed 2v (twice as fast). What is the ratio z lwwk-)x0( -vira (fiof 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 buildi4zxeve5sk b9.ng. One second later, ball B is dropped from the same building. As time progresses, the distakbzv x95se. e4nce between them

  Ball A is dropped from the top of a buildi fzn7z7amaq/dk6*+ling. One second later, ball B is dropped from the same building. As time progresses, the differenl zm*aad6/ik7+qz f7n ce in their speeds

  Two objects are thrown from the top of a tall building. .m+7y eaegun15ds+ cu One is thrown up, and the other is thrown down, both dn+a5+cese 7u1mug y. with the same initial speed. What are their speeds when they hit the street?

  A brick is dropped from the top of a building8qgp2cub w(c 2. A second brick is thrown straight down from the same building. They are releaspc(2g2ucwq 8bed at the same time. Neglect air resistance. Compare the accelerations of the two bricks.

  An object is moving with constant non-zero vl1kjr(b c+0cs 9cqyc2elocity in the +x axis. The position versus time graph of this object+2scjrl 9cc b(q1kc0y is

  An object is moving with constant non-zeroj:)xonhll6 +zl, lca xgd )0g+ acceleration in the +x axis. The positiona0 gx:lz),ldjl+ )n6gl hc+ox versus time graph of this object is

  An object is moving with constant non-zero velocity in the +x axis. Thexht*p6(v jz6 n velocity vet z*xnp66jv h(rsus time graph of this object is

  An object is moving with constant non-zzvt 0)lwjzv03 ero acceleration in the +x axis. The velocity versus time graph of this obwjv3)0 vl0tz zject is

  The slope of a positivwwck(2w 0mh8qqr7l,on versus time graph gives

  The slope of a veloci)mcc; pl* o6tuty versus time graph gives

  The area under a curve (v*b9vjmpd f3in an acceleration versus time graph gives

  The area under a curve in a veah54)1 ye4mc ewk gg7:(auri hlocity versus time graph gives

  If the position versus time graph of an obje enfw0tfjks7no40* ,ect is a horizontal line, the object i0sjewn*o0kf4, t7 n efs

  If the position versus time graph:m)vf f8jqtozxw.duw,5 8u hx7 gn2 +x of an object is a vertical line, the object isju 5.7fqm u x8xxww: v,fh8+ndzg to)2

  If the velocity versus time graph of an object is a horizont6pqk ncfvj:3dqq-*xi1lp2n 3h/ ,t paal line, the object ispcfq p2l nq 1-j,n/k a63d:iqh3v*xpt

  If the velocity versus time graph of an object is a st,skdu8 k j67rzraight line making an angl6uzs, 8 dkjrk7e of 30 degrees with the time axis, the object is

  An object moves 15.0 m north and then 15 zsfe93emeo4 ho*pt6tu+0 a1z2hr ch 1.0 m south. Find both the distance travelee0rmt zz1oheceht+ o296 fa3h*u ps54d and the magnitude of the displacement vector.

  A boat can move at 30 km/h in still water. How long will it takfbz1p -)7rs 0rpg/b mbe to move 12 km upstream in a river flowing brb0p-s 7grzf/1)mpb6.0 km/h?

  55 mi/h is how many m/s? (1 mi = 1609 m)e n+ 3qf7c,ysvye,/uu

  What must be your average speed in order to travel 350 k*v+ yhgamw-;nev 3h *um in 5.15 h?

  A runner ran the marathon (approximately 42.0 km) in 2 hours and 57 min. 7.as/b rq2kdir k;uh/What is the average spu7r2; hs/ ridab/q. kkeed of the runner in m/s?

  A car travels 90 km/h. How long does it take jjr q:o0us0j0 for it to travel 400 km?

  A ly (light year) is the distancessv/; qhmit 58 that light travels in one year. The speed of ligq m sshvt8/;i5ht 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 j0 hea*zi+gx p *fn.adkbz1:6 side for 4.0 s, how far do you travel during this inatfi a6:0g1kjzphzba*+. exn*d tentive period?

  If you run a complete loop around an olhsh* ,ptp;4+ fn k1gdutdoor track (400 m), in 100 s, your averag4ldh* t+g;pn1sp hf,k e velocity is

  A polar bear starts at the North Pole. ml/u) ghsf ,b c4byx7yd)nk6 /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 trl6)hdc/mn 7sfg/, uyy4bb)kxip takes 45 min. What was the bear's average speed?

  A polar bear starts at the North Pole. It travels 1.0 k +1ycd :f4wsdom 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 w w4y1c d:fsdo+as the bear's average velocity?

  You are driving home on a weekendl,l0hv0mc5w w3k uf hd8x,8 j+rio+ep from school at 55 mi/h for 110 miles. It then starts to snow and you slow to 35 mi/h. wud0m,i+reh5fkxl lpj ,v+ 8o 803hwcYou arrive home after driving 4 hours and 15 minutes. How far is your hometown from school?

  A motorist travels 160og2o. zr2tvmh6can9:lfyw87dt;i 0s km at 80 km/h and 160 km at 100 km/h. What is the average speed of the motor.lt 6 ;ov7y9df0 r:z2sgo cht8 namwi2ist for this trip?

  A motorist travels for 3.0 h at 80 km/k 8/d. mz:ddxhh and 2.0 h at 100 km/h. What is her avera: d. d/hx8dmkzge speed for the trip?

  An airplane travels at 300 mi/h south for 2.00 h and then at 250 mi/3ws. r)i.gma, 0a.t bw au9 uk/abdyt-h north for 750 miles. What is the average speeiu t./st)b. wmya ra0,-k 9da ub3wa.gd for the trip?

  In a 400-m relay race the anchorman (the person who runs the l7fcihw+ a8w8 oast 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 ru iw8hfw7c+a8o nner 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?

  A car decelerates uniformly and comes to a stop aftt 3)ox ny(b/tver 11 s. The car's average velocity during deceleration was (ytvnx/o)t 3 b48 km/h. What was the car's deceleration while slowing down?

  An airplane increases its speed from 10 e ma(yu 3.b*,uy/jr, fp/ktfa0 m/s to 160 m/s, at the average rate of .yr/but j fym(ef*ka, 3p u,a/$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h accelerates atq/k8 ;d*np.ovn b+b sy 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 accele9jem9 n(nd )tfza+mbt,ai:s2 rates 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 2lm;m.;cjpes speeds up with a constant accelerationj mlp.c;2e;s m of $2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial velocityxjc) ghlr l*ofveji)+p.n/ .jm-p-s. of 3.1 m/s experiences a constant acceleration o- xjpm-l *gs).ncjh fo. vr il)p+j/.ef $4.6 \; m/s^2$. What is the cart's displacement during the first 7.8 s of its motion?

  A bullet moving horizontally to the right (+x direction) with a s83bkv91 ualqbpeed of 392 m/s strikes a sandbag and penetrates a distance of ub8kvq9 13 lba67.69 cm. What is the average acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is launched from a catapuk dw8zczj: nju8) w/j7lt on an aircraft carrier. It reaches ak 78 uwcj j/z:d)8zwnj 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 the catapult?

  A car starting from rest moves with constant accelerati33mbg-2n auhy7m( jsdon 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(w7lj pe 0,dk* hj5eay n;i,jl is its average accee,w, *jnjelilh (;y0 kj 75adpleration?

  An object starts from rest and undergoes uniform acceleu :gv (9otnl:+s:p*+5 yyaeez;ay4 yb8pc aesration. During the first second it travels 4.3 m. How far will it travel during the*(byelupa9 gcav yt+4n:a8e: so:ey p y;+z5s third second?

  An object is moving in a straiglc /3qb*tb3t hu17ewxdm56kiht line with constant acceleration. Initially it is traveling at 16 m/s. Three seconds later it is trav1xwck ttb3h* qi 56u3/l7de bmeling at 10 m/s. How far does it move during this time?

  A car starts from re y q0xfu b+i5lboj x:,ga78ej.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 tireso+hjbi08 e0kii;k u7 c8hh-mo on a 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, ai;zq r/mqq..-i mt:w a car that has been waiting at the intersection startsi/zmi. qw. atr :qmq-; 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 upwargsoub9/ )ax (v *zjht.d with a speed of 12 m/s on the surface of planet X where the acceleration due to grabha (t/g*ou9sj. )vxzvity 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 pychexx+1v yq ukqn at zk: 1*8k8m9(e6lanet X where the acceleration due to gra*:8vcqknm(+qyu kxh ky1z89 6ea1txevity 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 of 15 m/s on the surfacebg uhzt+xf7 y+ 6qe)asv+z;u/ of planet X where the acceleu6 h+t/ gx )+ez +yzbf;svua7qration 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/ssqd 75bbqgf28 on the surface of planet X where the acceleration due to gravity75b2qg8b qsfd 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 your friw:gwz vz 0-so-z/o)-6iqd nb fend holds a ruler bet)z 6gdsv/n fz-zi o q:--bw0woween your fingers and releases it without warning, how far can you expect the ruler to fall before you catch it?

  A ball is thrown upward at a ve27 i(ktmrtb:x, ik(xur 8+gwo6vc8tkge *6azlocity of 19.6 m/s. What is its velocity after 3.00 si 6k(cg86gti2kz,7(ke* vtrm uorax8:xb tw+?

  A bullet shot straight up returns to p(a5wz7 )ixyl its starting point in 7 s. What is the initial speed of the bulia)7x (pwylz5 let?

  A ball is thrown straight up with a mu*0ylvtst zp) ik)1, speed of 36.0 m/s. How long does it take to retur u) zitys1tk*0 )l,vmpn to its starting point?

  A ball is thrown downwa;afo73z -mdw5f vpe+r rd from the top of a building with an initial speed of 21 m/s. It strikes the ground after 4.2 s. How high is the building?7fra35mo v-pdf e ;zw+

  A ball is thrown strai)9xl.6 3q fn-,xdhfs3vdw6 nqbsj eh6ght up with a speed of 30 m/s. (only fill in numerical value ,h6- ql 3ed3b.9s6h )jxx n vw6fsdnqfin the 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 l/ a9k1 r)jq epmng,9eup into the air with a speed of 26.2 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 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 velocity e k9go,( ehljwvjp *b4n4i4qpa4/bp;at t = 1.0 s?

  In Fig. below, what is the velocity at t -v0ewan+ on wg*/7alb = 2.5 s?

  In Fig. below, what tftjj)8z31r ,peslh( is the velocity at t = 4.0 s?

  In Fig. below, what is the velocity at t = 5.5 s?:3h;mifajb;o

  In Fig. below, what is the average velocity from 0 to 4z 6u qa8-wx68t/ewow.juorf k9 8b 0qz.0 s?

  In Fig. below, what is the avera,fg7.xjj+wqd h 9as n8ge velocity from 0 to 6.0 s?

  In Fig. below, what is the accecyo5 v t13q7meleration at 1.0 s?

  In Fig. below, what is the acceleva/-p crx7d7 tration at 3.0 s?

  In Fig. below, what is the average acceleration iig1 u;7v alh2from 0 to 5.0 s?

  In Fig. below, what is theba77-k hz63h k nhgu,e average acceleration from 0 to 8.0 s?

  In Fig. below, what is the displacement from 0 to 8.0)k,(b2pi7 hcggvb, vukpa:5h s?

Does a car speedometer measure speed, velo zd 1gg3:d8dincity? {speed|velocity}

  An object can have a varfe h h/y(afrm)(n5j,c ying speed if its velocity is constant.

  The velocity of an object can be negarv44j (h(;euh vat vy;tive when its acceleration is positive.

  If one object has a greater speed than a second object, the fpb8(g+j *uwx nirst must have a greater accelerapg 8*bnjux +(wtion.

  Two cars emerge side by side from a tunnel. Car A is trave4vks (y.cd,fcwe5 7 hmling 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 acq *3n1umio le/6ezj (fceleration decreases.

  A baseball player hits a f3j q3oma1st qmpb *d/2oul ball straight up into the air. It leaves the bat with a speed of 3dpb1a/q jmmos3tq2* $120 \; km/h$. 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 objlgpv 1dt:z99tt8au 5wect speeds up, what is happening to its acceleration, how does it change if air friction is ignoazg1t5l 9wtpd u89tv:red?

  As a freely falling object speeds up, what is happening to i7mj-5 fx1fqry/nla 6 /mi+ arcts acceleration, how does it change if air friction CAN NOT 5fi+-mrjaxr/1 /lf76m nyq cabe ignored?

  An object that is thrown verticalsufaxn 1 :)wryv69i z(ly upward will return to its original position with the same speed as it had initially if air resisyz(:x 9 s6nivaf1wu )rtance is negligible. If air resistance is appreciable, how will this result be altered?

  An object can have zero veloc( s5x; n)w0p2zg,issp aj *ymmity and nonzero acceleration at the same time.

  An object can have nonzero velocity and a(dr452pcn0z 6zugf pzero acceleration at the same time.

  An elevator moving from the second floor to the fifsqd .q7v/e+u 57n9e scn ,bgzcth floor making no stops along the gzc/qdq7nu +5 7.nb se9e,csvway has zero acceleration all the time.

  A rolling ball moves frk++oi +4 ckas-d p)mocom $x_1=2.1 \mathrm{~cm}$ to $x_2=-8.6 \mathrm{~cm}$ during the time from $t_1=2.9 \mathrm{~s}$ to $t_2=5.1 \mathrm{~s}$. What is its average velocity?  (数值)  $cm/s$ (only fill in numerical value please)

  A particle at $t_1=-4.6 \mathrm{~s}$ is at $x_1=2.1 \mathrm{~cm}$ and at $t_2=3.7 \mathrm{~s}$ is at $x_2=7.9 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete laps around a quarter-muoixd h 13w-k52wbty p rrg.()ile ($1 \; mile = 1609 \; m$) track in a total time of 9.6 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 straight line, moving 103- 1s /3 nf9ehr*3pffs6skm bqi m away in 12.7 s. It then turns abruptly and gallops halfway back in 4.5 s. k6pfs bsm3nfr /qh39 ef-*i1 sCalculate (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*ijss3orswotk :8z l .j0 ag5;m $11 \; m/s$ to $23 \; m/s$ in 5.1 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 froxm w.m0 +f9xb1o8rewv m $17 \; m/s$ to rest in a distance of 60 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reach a speedma5j0kk3/rr r wu jv68 of $25 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $2.6 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinter can burst out ofkgj 5o5sa8zu3c7ia9q the blocks to essentially top speed aboutg 87a 5a oj9csi3zkq5u $11.0 \; m/s$ in the first 12.9 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 unifcdf2ne5,8) 9c nkug6 n t7ntzxe2gfx5ormly from a speed of $16 \; m/s$ to rest in 5.77 s. How far did it travel in that time?  (数值)  $m$

  In coming to a stop, a car leaves skid marks 92 m long on the highway. vo8w-tijyu7-*yd2g v+ f5 pwoAssuming v7-o+twv8p2ugwy5yo- *idjf a deceleration of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck going y7f9,at 9v e 7erg9itz$25 \; m/s$ 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 (qir4(bj wzcu j)1q5 uthan 30.0 min. After exactly 27.0 min, there q1r(izb uj5)c4qwuj (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?    $s$