Suppose that an object travels from one point in s i 1v 2guc:mn/o:eopv5pace to another. Make a comparison between the displacement and the disvi2engo op:: mv1/ 5uctance traveled.

  When is the average velocity of an object equal to the inc*f3gj8u qt+vc 11 hiastantaneous velocity?

  A new car manufacturer advertises that their car can go "from zero tt,d 4.nuas0 uxo sixty in 8 s". This is a dest.asn,u40 xdu cription of

  An object moving in the +x axis experiences an accellrsdvl ,(jeo3b6jf5bk+ q:2c eration of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to the East (+x direction) begw x*l(qb+ vv,mins to slow down as it appqvxwv*,m(+b l roaches a traffic light. Make a statement concerning its acceleration.

  Suppose that a car traveling to the West (-x direction) be(px)yybjv s n.+ ,g9zh z(m8t7s+njbn gins to slow down as it approaches a traffic light. Make a synm)+ (tzg, + hb8y.s(jnx7bsvp zjn 9tatement concerning its acceleration.

  Suppose that an object is moving with a consta sh*qe(j*:bf z7 ogr2znt velocity. Make a statement concerning its accelere *zf:qbso2g*(zhj7 r ation.

  If the velocity of an object is zero, does it mean that the acceleration is jcp6z g7;/pda zero? Support your anc7jp 6gaz /d;pswer with an example.

  Can an object's velocity change direction when nq4y 2z4k 6ppcits acceleration is constant? Support your answeqzp ck4n46yp 2r with an example.

  Suppose that an objecxc+-t;9w1 0h ttanvx qt is moving with constant acceleration. Make a statement concerning its motion with respect to timcnt; taw9x0vx+ 1-tqhe.

  Can an object have increasing speed while its accele8 p9.-a qdavbrration is decreasing? Support your ansdr-aqv . 8ab9pwer with an example.

  Suppose a can, after an initial kick, moves up along a smooth hill of et*)x f0iqww,dy;fd cu 7(b4h ice. Make a statemendufwy0 e) q,i (4b7;hfct xwd*t concerning its acceleration.

  Under what condition is average velocity equal kho m;:shn ,.sto the average of the object's initial and final velocns,o.:hm k ;hsity?

  Objects A and B both stam+ u1mezmpmpmel+3g oar v6;d80:kc ,rt at rest. They both accelerate at the same rate. However, object A accelerates for twice the time as object B. What is pe:6 0c uape1km mom8r3 d+mz;,g+lmvthe final speed of object A compared to that of object B?

  Objects A and B both start from rest. They both accelerate at the same rate. tl,vbcv*scpr 20,2pkvrqb 1lcv3. l3 However, object A accelerates for twice the time as object B. What is the distance trpl03vctccqsb b rl,rp2 .v1vk,23 v*laveled by object A compared to that of object B?

  When an object is released from rest and faly xayizwc55:(b3z kw3 ls in the absence of friction, which of the following is true concerning its motion?wx(ibc: zyk5y 5 wza33

  When an object is releaswkpjky4, h74 sed from rest and falls in the absence of friction, which of the following is trkkhw p ,4ys47jue concerning its motion?

  Suppose a ball is thrown straight up. Make a stateme:0lnqys6ep / qj9c:cbnt about the velocity and the acceleration when the ball reaches the highest point.69q:: sny bj/pcc0l eq

  Suppose a ball is thrown straight up. Wh5sq-nks wr8va7b cp/5at is its acceleration just before it reaches its /58vp-q snckba 57rws highest point?

  Suppose a ball is thrown straight up, reaches a maximum hei/4zt63txkkh:xzm0qeeci mu 854iag 3ght, then falls to its initial height. Make a statement abt4ux z8m 3kmkgiz605t:a /eq4 3hixceout the direction of the velocity and acceleration as the ball is going up.

  A ball is thrown straight up, reaches a maximum height, then falls to its initiangr.e3j v5+2r e trga.l height. Make a statement about the dir+gr5a.rn tr.e e3v2gjection of the velocity and acceleration as the ball is coming down.

  Suppose a ball is thrown downward in the absence of air resistance. Make a st 3rd-in:iu7 cpy1 0*wdyp kx9katement concerning its acced- ycyi17 3dpk xwk9 u:p*0nrileration.

  Suppose a skydiver jumps from a high-flying plane. Whatsvu)ji3 tuos+ t 6o/r* is her acceleration when she she reach/ju*uv3+orsst t6o i )es terminal velocity?

  A ball is thrown vertically up2eq n:hp,hsyf z:;-htward with a speed v. An identical second ball is throwsze th2:pq-,fh y;hn: n 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 does the second ball go than the first ball?)

  Ball A is dropped from the top of a bu8r gz5.l rxg9tilding. One second later, ball B is dropped from the same building. As time progresses, the distance betweengx.r zgr9l 58t them

  Ball A is dropped from the top of 75a,qqvr:al .)f rnf ma building. One second later, ball B is dropped from the same building. As time progresses, the difference 7)5 fn,lq rfvm.q ara:in their speeds

  Two objects are thrown from the top of a tall buildingsovihlj- .cwnm7; 1e 5 qhs2g7yvl(8n. One is thrown up, and the other is thrown down, both with the same initial sphno; m8.ei-vs7 h5nvqc gj72(ll1wys eed. What are their speeds when they hit the street?

  A brick is dropped from the,kqy .7 ,tsxtx top of a building. A second brick is thrown straight down from the same buildi kxtqsxt7. y,,ng. They are released at the same time. Neglect air resistance. Compare the accelerations of the two bricks.

  An object is moving with constan:wwa2(q; ib1 t4 ubjznt non-zero velocity in the +x axis. The position versus time graph of tbutzaw( wn2q j:;i4 b1his object is

  An object is moving with constant non-zero accelerat*hn 4ra 6gm3un0a:nv wx:xi68suba gk0,b 7ision in the +x axis. The position verssbbsvxua0ugixamg a3 0r8::n 67i hk* ,wnn46 us time graph of this object is

  An object is moving with constant non-zero velocity in the +x axis. The velf*tl ta+1ay-ayd az0p3/4ca :f: ikz kocity versus time graph of thi a/i4f0alap:3-ztyt*1 ykd + zcakf: as object is

  An object is moving with constant non-zero acceleration in the +x ap1 xbzq+-pwfb6 /ul,mbo:m /rxis. The velocity versus time grap/-xb1obfp:mmwl+z6b, qpr u/h of this object is

  The slope of a position versus time graph g/0d zp5uzv9fhives

  The slope of a velocity versusf*zn (h/ve;l*7qraq s time graph gives

  The area under a curve in an acceleration versus time graph givecsml897giq2b ;5 tydbs

  The area under a curve (wn y isajybb645pa8: in a velocity versus time graph gives

  If the position versus time graph of - xc+ z0 87q)wvd*7vlgiiudip an object is a horizontal line, the object isd 8q-c 7vwz0g*i7il)vdix +pu

  If the position versus time graph of an object is a vertical line, the object isdqg-0h+stz+ vvw8 g. dx .s)mwm+8. v xzgvg-dsd0.hq s +)tww

  If the velocity versus ti-fbl w+z-n5xyy+*dn h me graph of an object is a horizontal line, the object i -nhlf5zd+wx*nyb -y+ s

  If the velocity versus time graph of an object is a straight s3 bs)-wzkb6/ w)z3ttimft8dline making an angle of 30 degrees with the time as)8 )izft wtdkb3w sbt63/m-zxis, the object is

  An object moves 15.0 m north and then 11.0 m sou+(nic w7 mq9 ahry-w*k2gk: fgth. Find both the distance traveled r- hq7n kwfgc(g +:y2*mwi9ak and the magnitude of the displacement vector.

  A boat can move at 30 km/h in still water.sf4 2or5 +fdq;pynxp, 2izcg6 How long will it take to move 12 km upstream in a river flowing 6.0pfdxczy+nis45fqr o62 g;,p2 km/h?

  55 mi/h is how many m/s? (1 mi = 1609 m) 51wd)kjezdj 1

  What must be your average speed in orde pgt 0r6xn-;pck3fvl :r to travel 350 km in 5.15 h?

  A runner ran the marathon (approximately 42.0 km) in 2 hours arrdyk0 6)y.5la7.f, 2agl om pgz4ue:5 zaky mnd 57 min. What is the average speed of the runner in mmg,5ay5p)r.lkmeo 4kr0 z7gyy 2:aaz6lf .ud/s?

  A car travels 90 km/h. How long doee r d-px90e,rcj8taz)qa/t 7js it take for it to travel 400 km?

  A ly (light year) is the distance that light travels in o0wkipld2 f pu;f6hg7 -ne year. The speed of lii2wg p0f67h- pfdu kl;ght 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 cb* x6,:l-vz(gpywpcx6x q;f the side for 4.0 s, how far do yo6 l cpcpg6xfbv:* zq;-wyx(x, u travel during this inattentive period?

  If you run a complete loop around an outdoor track (400+ z nuc*zeo91n m), in 100 s, your average vn+ 9n c*uzez1oelocity is

  A polar bear starts at the North Pole. It travels 1.0 km south is9/ 4dwn 8bq+1 sayjmi+*xqu, 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. Whatw j i8/q41++xs*umn9 q ysbiad was the bear's average speed?

  A polar bear starts at the Norie 0vvlmgx7 64th 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. Thisg7x m4 0ivl6ve trip takes 45 min. What was the bear's average velocity?

  You are driving home on a weekend from 9altdaz,j;.7shu)i e school at 55 mi/h for 110 miles. It then starts to snow and you a.lda uzet7i;js ) 9,hslow to 35 mi/h. You arrive home after driving 4 hours and 15 minutes. How far is your hometown from school?

  A motorist travels 160 7s-6(nvugw 6pq zznaxj0sdf :3knr6(km at 80 km/h and 160 km at 100 km/h. What is the average speedxv:3w-np 6qgzj7da(knns6z06 u s (f r of the motorist for this trip?

  A motorist travels for 3.0 h at 80 km/h and 2.0 h at 100 km/h. What (6x2 iehha/+-en jk jnis her avera-xh2j e hn6a nekj/i+(ge speed for the trip?

  An airplane travels at 300 mi/h south for 2.00 h and then at 250 m+h ,v cddn8iewg+yc c 7;5 g(8vrutcx,i/h north for 750 miles. Whc,gu w; c dr(vxgtv8+hen875i+c y,d cat is the average speed for the trip?

  In a 400-m relay race the anchorman (the person w w/u 9fyoaei-x 3f82citr6ue(ho runs the last 100 m) for team A can run 100 m in 9.8 s. His3t(9a /x-yr2uie f6 c ifeo8uw 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?

  A car decelerates uniformly and comes to a stop after 12 s. The cn;1ankwni mnejg 9,4;ar's average velocity during deceleration was 61 km/h. What was the car's decelenk, gin;1;e aj4wnm9nration while slowing down?

  An airplane increases its speed from 100 m/s to 160 m/s, at the aveo+,t fud+ f iunm5zi me;uqg,*+7irpoq2vy25 rage rate of 7, mu zru*io2v5;,e 2+o+fm5ft i qiqy+u dpgn$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h accelerates at the rate.pdh f) vh+p+e 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 accc r*w,qt c+o1helerates 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 with a constant acv, 8*zcqxz e0nceleratio 0v*nq,z 8cxezn 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 experiences a constant acceleration 1 3-vtxvizrv2 o x21- i3vrztvvf $2.8 \; m/s^2$. What is the cart's displacement during the first 5.5 s of its motion?

  A bullet moving horizontally to the right (+,t o tdrnzne*wp*o64y69 /ggrx direction) with a speed of 523 m/s strikes a sandbag oer9otgnn, tyw*drp*46/z g6 and penetrates a distance of 22.24 cm. What is the average acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is launched froc* z .2 n(kx01iezmkdmm a catapult on an aircraft carrier. It reaches a speed of 42 m/s at the end of the catak1(*2z xzink.m mce d0pult, 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 acceleration;i*r0r (rjxkt f1)s 9ig2vime 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.mip7cdv:tfn edla )1u5i9 1 5e What is its average acceleratiofv )n pec e1:iia5du15tl d9m7n?

  An object starts from rest and undergoes uniform acceleration. During the flqrq.yid1 nkjrabw :j 6 1n003irst second ar0 1j yir.01 w:qknqb n3l6djit travels 8.9 m. How far will it travel during the third second?

  An object is moving in a straight line with constant acceleration. Initially iyhfnq t:5)wd* t is traveling at 16 m/s. Three seconds lat: 5dq)ftyh*nwer it is traveling at 10 m/s. How far does it move during this time?

  A car starts from rest and accelerates uniformly ao1w6 /d7g1or7egdvqkd p 3ga4t $3.0 \; m/s^2$. 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 can decelef7*o0kq8y4kks u. scn: cmxi:rate 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 w 2a mpg,;((l :esowimm2(r ,eyno8bgfaiting at the intersection starts ahead wi:g2 o(8lwy(m,bpmanei( res2o,m ;fg th 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 wiwj 0lf/hvo 3f.tr7-mq th a speed of 12 m/s on the surface of planet X where the acceleration due to gravity i/03jrm-7qt w lofvfh. s $1.5 \; m/s^2$. What is the maximum height reached by the object?

  An object is thrown upward with a speed of 12 m/s on the surfz2wu7jztk) z, ace of planet X where the acceleration due to gravity iswkt 7jz z),2zu $1.5 \; m/s^2$. 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 ogn +f y:eceg+u(;ej.tn the surface of planet X where theu+ggyj e+een t;(:f .c 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 speed ofxe) a3ft c77ur 14 m/s on the surface of planet X where thext37e)fra c7u acceleration 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 your friend holds a rulf:0flga. ym7z da:k+jer between your fingers and releases it without w a:ygklf.dj0 ma+f7z:arning, 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. Whatpggl95j aj ))o14ucy nemd8w/ is its velocity after 3.00ja8/mg4 )5pnwjul9dy o ge )c1 s?

  A bullet shot straight up returns to its starting pt/gz6d5b jv(6 e3ombn oint in 12 s. What is the initial g36e/5vojb6b tzn dm (speed of the bullet?

  A ball is thrown straight up with a speed of 3/(i*yhd ak(1lt5k( n cekb(qb9tpw9z6.0 m/s. How long does it take to ret*btk(/ dy9w9b 5(q ztn(h1(kk cli epaurn to its starting point?

  A ball is thrown downward from the top of a building with an initial spx/sn a5 eq6c9rz9xb,reed of 8 m/s. It strikes the ground after abr ,s9xcnrq6 ex9/z 52.0 s. How high is the building?

  A ball is thrown straight up with a speed of 30 m/s. (one9 8a(wv.n nb.8tgwa ee1fjg(ly fill in numerical value in the bla8bt8e(9fa wj.naenwg ( 1gv. enks)
(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 iirlm5r2l5 +cj 2ak4z-curul81 k b+amnto the air with a speed of 42.2 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 3 seconds later.  (数值)  $m/s$
(e.) Determine the time at which the ball pass a point 5 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 5.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what is the velocity a5 0klxv++z/pqta +-vxfgwne 9 t t = 1.0 s?

  In Fig. below, what is the ve 8lw 7g3oss j5etx(fcbb* )fh2locity at t = 2.5 s?

  In Fig. below, what is the velocity at t7gayt0 e4r*wa ;pr3zf = 4.0 s?

  In Fig. below, what i310wao jobp) uh/;cp qs the velocity at t = 5.5 s?

  In Fig. below, what isdwrt)ute . u5fdk()-v the average velocity from 0 to 4.0 s?

  In Fig. below, what isn:ve4fe* s*w7tjc p8t the average velocity from 0 to 6.0 s?

  In Fig. below, what 81y 1eb 1(:btdbunvo g/v;qeeis the acceleration at 1.0 s?

  In Fig. below, what 4a kt9 svcxt8u72fss( is the acceleration at 3.0 s?

  In Fig. below, what is the average accelfsl7i z(gs dzg(tl,yb: 57vn15n t; cl.enlz ,eration from 0 to 5.0 s?

  In Fig. below, what is the average a,a la( 0x85uvlkkdkm7 cceleration from 0 to 8.0 s?

  In Fig. below, what is the do7b3tfo: g:f 2xcmzf5isplacement from 0 to 8.0 s?

Does a car speedometer mepjtqgo/ a.n d;i:1vy7asure speed, velocity? {speed|velocity}

  An object can have a varying speotl. dft75at q(b) p8sed if its velocity is constant.

  The velocity of an object can be negative when its6x*: y;i tcpc gael;3p acceleration is positive.

  If one object has a greater speed than a second object, the first must ha ;l x44/cg0p4dgd qrjhd vdw,3ve a greaterd4,j0vr dl;xd 4/pq d3h4cgwg acceleration.

  Two cars emerge side by side from a tunnel. Car A is traveling with a speed of1tjz1xbp.1 fhs5 ta:h v8d 4np $60 \; km/h$ 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 accelernfxc + b/7+iewation decreases.

  A baseball player hits a foul ball straight up into thet-g oswr-z:,7 thjd ;1rv;m v,tb1c ie air. It leaves the bat with as:--rc, vot1;i7e ;rdz,tmg 1t vwbhj 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 ut be8riz5r(y. p, what is happening to its acceleration, how does it change if air fricz.bet5ry ir(8tion is ignored?

  As a freely falling objel+f,2eoehhoeo7.e ju9+ v rx(ct speeds up, what is happening to its acceleration, how does it change if air friction CAN eu7fx hjh+(. r9l e+eo2 ,oevoNOT be ignored?

  An object that is thrown ver8* -zosq qi3rntically upward will return to its original position with the same speed nzqq oi 8-s*r3as it had initially if air resistance is negligible. If air resistance is appreciable, how will this result be altered?

  An object can have zero velocity and nonzero acceleration at the sa0jpq q ; hbl2+lf 4)wxi)d8xczme time.

  An object can have nonzero velocity and zerzr5;l.nh 4wx aew y u8g((t4xro acceleration at the same time.

  An elevator moving from the i9 rrnt -17vqd)wll -bsecond floor to the fifth floor making no stops along the way has1rt )bln9-iv- dr7wlq zero acceleration all the time.

  A rolling ball moves + nwu-a(44kump ctl6bfrom $x_1=3.4 \mathrm{~cm}$ to $x_2=-5.8 \mathrm{~cm}$ during the time from $t_1=2.2 \mathrm{~s}$ to $t_2=5.7 \mathrm{~s}$. 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 $x_1=2.8 \mathrm{~cm}$ and at $t_2=3.6 \mathrm{~s}$ is at $x_2=8.4 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete lapc ppu.3logn ; jq/,nb)s around a quarter-mile ($1 \; mile = 1609 \; m$) track in a total time of 8.5 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 11y-2 0 jvs(eazxt l:2rf2xuyhtr(z,u4 2 m away in 9.3 s. It then turns abruptly avualjt4zer:02( hx2-,2tx y fsu yrz( nd 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 from iizl5 8qx 5mx,cn yk(0$11 \; m/s$ to $22 \; m/s$ 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 from q60i k/p6kwu ri4ule/$15 \; m/s$ to rest in a distance of 84 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must rea z)c:sy h bs +3l0ku;26/u,guiobgqotch a speed 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 of the blocks to essentially top speed ayi la)5qe/ uf7bout fi y 5)/ql7uae$11.3 \; m/s$ in the first 11.6 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 unifor ; n7f;cgsmj2p ;p4vsomly from a speed of $17 \; m/s$ to rest in 4.71 s. How far did it travel in that time?  (数值)  $m$

  In coming to a stop, a car leaves skid mh 1yocp: 9rq*farks 92 m long on the highway. Assuming y9:q*pro c1f ha deceleration of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck gosthkccu. j: )fmx7: l2ing $25 \; m/s$ 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 jsk n u.b;/+xj7t iuk/min. After exactly 27.0 min, thenkt7iu / ju.kxb/;j s+re 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?    $s$