Suppose that an object travels from one cjwgacw- n1tifj )76/point in space to another. Make a comparison betnfwgt w1/c-jj )6ia7cween the displacement and the distance traveled.

  When is the average velocity of an objecmhr (a; teh4f1t equal to the instantaneous velocity?

  A new car manufacturer advertises that their car can go "from 2cujaz:bm v2e 1 *ue)sz -(snda*vf u1zero to sixty in 8 s". This u f 2euu(b)*mvzvan: d1a* j21s-eszcis a description of

  An object moving in the +x axis experie rf70pp lo.ct gu;a3*i pldt)8nces an acceleration of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to the East (+x direction) begins tolm3 c i7elrw8/ slow down as it approaches a traffic light. Make wm73lrie c/8l a statement concerning its acceleration.

  Suppose that a car traveling to the We.r:m 4au p 6vtsso2k+ust (-x direction) begins to slow down as it approaches a traffic ligsra.m6t:k ous2 v+up 4ht. Make a statement concerning its acceleration.

  Suppose that an object is moving with a cons/o:knyiklt8 ikm*bd f vf 4.35tant velocity. Make a statement concerning ki5 b o.n8f4*kmi ty:v f/dkl3its acceleration.

  If the velocity of an object is zero, does it mean that the accelj ydbsw - yvd314:jy,eeration is zero? Support you,s: yd jj1ebwyv34d-yr answer with an example.

  Can an object's velocny9. tuzw i/p*ity change direction when its acceleration is constant? Support.iyu p/twnz9 * your answer with an example.

  Suppose that an object is moving with constant accelr bouzxj 60oa j9gx17:eration. Make a statement concerning its motion with respect t:j u07oax 69o1rxj bgzo time.

  Can an object have increasing speed wuzsu12ttz5(y hile its acceleration is decreasing? Support your answer withzu 2 syt1zu5(t an example.

  Suppose a can, after an inixpsoz/7 ccc8+* x8b egtial kick, moves up along a smooth hill of ice. Make a gxcpe*/ b878sxc +c zostatement concerning its acceleration.

  Under what condition is average velocity equal to the average of teqawiga2 nr9 x:t07* che object's initial an7 2rag a9*eiw txq:n0cd final velocity?

  Objects A and B both start at rest. They both accelerate at ths kzl9.p m;iw:ow;* tye same rate. However, object A accelerates for twice the time as objewyt9olm.w; ik *; :zspct B. What is the final speed of object A compared to that of object B?

  Objects A and B both start from rest. The0 099:. fdgnlxq +fp,2zsegex.nkr xwy both accelerate at the same rate. However, object A accelerates for twice then xexdsq9f9wrk + .z.g2 ,pln0x:ef0g 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 fo x pl4fjo*7u0riction, which of the following is true concerning its motiopo0uf*4j 7xl on?

  When an object is released from rest and falls in the absence of friction, wt,* inl; in+wmhich of the following is tl+i;nw* m,itn rue concerning its motion?

  Suppose a ball is thrown straight uzps2d3a6l56 zt 6nr wbp. Make a statement about the velocity and tswrzp 2n 66btz3al6 d5he acceleration when the ball reaches the highest point.

  Suppose a ball is thrown straicz)3ow f08 nvh,jm ad8z e+9gpght up. What is its acceleration just before it reaches its h0 ej3 p,d+wm8)gh zvo8cnfza9ighest point?

  Suppose a ball is thrown straight upkx4pbb8dlem2o.g k t3 *b 7rogy v71t6, reaches a maximum height, then falls to its initial height. Make a statement about the direction of the velocity and accelerbm.7lbkxeo 3tb yt r 428d6kv7o1*pgg ation as the ball is going up.

  A ball is thrown straighta94 /b.ubbvbd up, reaches a maximum height, then falls to its initial height. Make a statement about the direction of the a 9vbb4./udbb velocity and acceleration as the ball is coming down.

  Suppose a ball is thrown downward in the absence of air resistance -2tc v0gjjx5l. Make a statement concerning its acceleg2- c0jl vt5xjration.

  Suppose a skydiver jumps from a high-flyingnl6xez3 +jud; ee(ur d5-vh z- plane. What is her acceleration when she she reaches terminal veloci6e5un-e 3 vjzuel -+h(zxrd;dty?

  A ball is thrown vertically upward with a speed v. An identical second qau+of,ep - gg7h z.i0ball is thrown upward with a speed 2v0.f,euz- ho gpa7 igq+ (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 building. One second later, ball Bbfynqc 845.oc i cn9d mb-g*r, is dropped from the same building. As timic,m9c b4nndbyc*8gor.- fq5 e progresses, the distance between them

  Ball A is dropped from the top of a building. One second later, bao +7 gbe+zrdx,ll B is dropped from the same building. As time progresse, gobd++rexz7s, the difference in their speeds

  Two objects are thrown from the top of a tall building. One is ;ckvkhrl.t 3wq;6v 9 lthrown up, and the other is thrown down, both with the same initial speed. What are their speeds when tk vllchk;9v;.6q3 trw hey hit the street?

  A brick is dropped from the top of a building. A second brick is thrown sf 6z;6staw6js ci6.dqycv.d8v ual);traight down from the same building. They are released at the same time. Neglect air resistance. Compare the accelerations of the two bricks. t.vqjvay w6;zdcd fas6);ucs68li6.

  An object is moving with constant non-zerofejn1 :f-j 4g;ljnd9q b9l-11 o qadhb velocity in the +x axis. The position versus time 4 l1ejf1lo;h:1jq9 nqdabdnb-9-fg j graph of this object is

  An object is moving with constant non-zero acceleration lx7;1a3 syaq3kw1ca xyza0wo s5jz4 9in the +x axis. The position versus time graph of this object 9zaa0 xz753oq1;4jl awywys3xc s1kais

  An object is moving with constant non-zero velocity in the +x axis. The **exb6t(v c(u )kp vajvelocity versus time graph of this objectp)(bvac t6vu*jk* e( x is

  An object is moving with constant non-zero acceleration in the +x axis.5q;u/8sb38jz m x t4oly5pg/ l8bmatl The velocity8ll5 jug/taq8smo4 5 t3lx m;b/ 8yzbp versus time graph of this object is

  The slope of a position versb m0/ ou+crwf9 ct-fh/ p8ef)cus time graph gives

  The slope of a velocity versus time mm . uxbs nbizyu;:-7+graph gives

  The area under a curve in an acceleration versusd8 xmas22,cp**ado l6(4 -xlekj akt n time graph gives

  The area under a curve i.chjj d-ou5.u g-vr 6mv ioa11n a velocity versus time graph gives

  If the position versus time graph of an object is a horizontal lini*q/ fh jx*ci-dony.3gkf1b9e, the object iy /k*dnx.ffg- 9cbi o*ji3qh1s

  If the position versus time gra yke-z7:+g bc0 2yljcaph of an object is a vertical line, the object is20 cbj :cgz7-kal yy+e

  If the velocity versus time graph of an w)zy *4:4bihoptc6pm7 e1wltobject is a horizontal line, the object ismp*b )ehlpti4 1:tw cy7z46wo

  If the velocity versus time graph of an object il 3zlz x11xvf2s a straight line making an angle of 30 degrees with the time axis, the object ixlv321z z1flx s

  An object moves 15.0 m north and then 11.0 m south. Find both the ke2tfrypbdv 3h+t06-,)n.ug t vr nx )distance traveled and the magnit -6,0khv rg)t.xetfnbr 2u+pydv3tn )ude of the displacement vector.

  A boat can move at 30 km/h in still wahf 8d2sls: qt*ter. How long will it take to move 12 km upstream in a river flowingq2 dflt*8hss: 6.0 km/h?

  55 mi/h is how many m/s? (1 mi = 1609 8vng0 cexe0o lvc694rm)

  What must be your average speed in order to travel 350.n bvf56jn iz3 km in 5.15 h?

  A runner ran the marathon (approximately 42.0 km) i+p xh 4phpc4 nzgm r0qm.9;hn3n 2 hours and 57 min. What is the average speed o pz0c9qpg34xprm ;mh4nh+n h. f the runner in m/s?

  A car travels 90 km/h. How long does it take for it to8 e7uqb2g08ikuu izws5i powghd)+475r)mxb travel 400 km?

  A ly (light year) is the distance that light travels in one year. j; .gj kptzu1) The speed of light )z gj ktup.j1;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 p.;vcw w 9t*uca straight road and you look to the side for 4.0 s, how far do you travel during this inattentiv*. wvcu ;tpc9we period?

  If you run a complete ivdqho ,8* s1jma 7liph 0/cf*f(x 9vsloop around an outdoor track (400 m), in 100 s, your average veqvdm9 silc/ 0ifhfo shavj ( px*,781*locity is

  A polar bear starts at q 2rf5u+m7ials0yy:o the 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 4:l5+y2sfoi7q ua0 y mr5 min. What was the bear's average speed?

  A polar bear starts at the North Pole. It travels 1.0 km6h oe chhu4;h* south, then 1.0 km east, then 1.0 km north, then 1.0 km west to return hc;6*4ho euhh 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 the31a*nnthzr , nn starts to snow and you slow to 35 mi/h. You arrive home after driving 4 hours and 15 minutes. How far is your hometon na1r3nth,* zwn from school?

  A motorist travels 160 km w 9cgvy tu47/8r5ulfe at 80 km/h and 160 km at 100 km/h. What is the average speed of the motyl5vw8/egfu9cru7t 4orist for this trip?

  A motorist travels for tdn13 xe fftm 2u35)kv3.0 h at 80 km/h and 2.0 h at 100 km/h. What is her average speed for the trip1 f2m3du ek35xn)vttf ?

  An airplane travels at 300 mi/h south for 2.00 h and then at tjuhrn5mf6k78ymg)) 250 mi/h north for 750 miles. Whafnmk8 7y 5jm 6t)r)uhgt is the average speed for the trip?

  In a 400-m relay race the anchorm7vbbqo*1,rrj an (the person who runs 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 lev1b,bo7j q*rr ad 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 comxr,7ya g:d gc6es to a stop after 9 s. The car's average velocity duricrgyx d7ag,6 :ng deceleration was 64 km/h. What was the car's deceleration while slowing down?

  An airplane increases its speed from 100 m/s to 160 m/s, at thf2itt3 4j1cqes7 r b.me average rate of s tjbrcq3i74. ef2t1 m$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h acceler-wa/+;omn 3 krin qa,wcjc6,gates 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 resbs:: y a6d8ryzt 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 then spap3;/qbsur5) hr rd c8eeds up with a constant acceleratioudhq3c;as 8p r5r)b/rn 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 5.9 m/s experiences a constant acceleration o + (jujs, .jn.ulez6nu jsj 76djlga8/f (j6+j .du s,7j6.nzj 8 eugaulsjjln/$4.7 \; m/s^2$. What is the cart's displacement during the first 7.7 s of its motion?

  A bullet moving horizontalhgbf5b q/oz.;b) lop 1ly to the right (+x direction) with a speed of 415 m/s strikes a sandbag and penetrates a distance of 44.46 cm. What is t); bg1p5o/blz fqbh.o he average acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is launched from a catapult on an aircraft carrier. It rea.9.nlo3jk- woa vy 1gtches 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 owo-n3 .j1.k vto aly9gf the catapult?

  A car starting from reggbzn;ps5i :cypf2vryg3 */9 dw )t y:st moves with constant acceleration 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 8pmko 7j2 ) 3valp,)b-vkubka)0 m/s in a distance of 200 m. What is its average accele) ,u3kpbk-bjavokma 7pl2 )v)ration?

  An object starts from rest and undergoes uniform acceleratioo,fq * *()7uov2byhhr 0uir zwn. During the first second it travels 7.9 m. How far will it travel during the thi 7ozfyv,rh w20u(u*b*oq ihr)rd second?

  An object is moving in a straight line with constabm z;5(xawiy6ln6t0 nnt acceleration. Initially it is traveling at 16 m/s. Three seconds later it is traveling at 10 m/s. How far does it move durin;6ayw5x6m n(til0 nbz g this time?

  A car starts from rest and accelerates un6v4y)c(stz2n ;jq lqziformly 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.jowk;eu5.gwa8 kx w8-tys vhqyq:(2n 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 waiting at the i ( an4d2r5rkrfntersection starts a4r 5(r2fdn akrhead 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 doub;b0cai,b6 0 gtg*on the surface of planet X where the acceleration due t 0icb ,a*6ob;g0bgt duo gravity is $1.5 \; m/s^2$. What is the maximum height reached by the object?

  An object is thrown upward witjmq 2kk2aya20f g/xon;,frec 5lz/0oh a speed of 12 m/s on the surface of planet X where toklga/oa5022/e,nr m;2zyf k xc0jf qhe acceleration 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 of 15 m/s on the surface of:7qp+ (bq+ 4wdb, w(vud( cb+pwdoy zn planet X where thew:q yb(+4 nu7((+bo+c v,pz qwddpd bw 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 0uy y0ki2v mp -m-do:fa0z,rwof 14 m/s on the surface of planet X where the acceleration due -m:vuw0opr0mfaki -zd0 yy,2to 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 b .qpwpel 4g5d;; msfhlz*,v/your friend holds a ruler between your fingers and releases it without warning, how far can you expect the ruler to fall p/e,q.g;v5*m zdb 4pwh fl;lsbefore you catch it?

  A ball is thrown upward at a velocity of 19.6 m/s. What iso y lbf73d6)p-sb h64y r.bqph its velocity after 3.os 76.h -64bd3y)rbbhqfly p p00 s?

  A bullet shot straight up returns to its starting point in 17 s. What9tr/j2 a d 71(zgsqgwm7jtf2ken z-8m is the initifjt1gm s2d2knq w7/m7 gz j r(9-zat8eal speed of the bullet?

  A ball is thrown straight up with a speed of 36.0 m/s. How long does it takh5eo* g-v6yf 3 nvac2me to return to its staryoc3m6 g5vf ve2n* h-ating point?

  A ball is thrown downward from the top of a building with an initial speed ofzsct/xa) fbns.o 4rm- u2*abxe :;uc 8 6 m/s. It sa.m bx 4asxrtn z;c:)uf*8 bu 2soe/c-trikes the ground after 4.2 s. How high is the building?

  A ball is thrown straight up with a speed of 30 m/s. (only fill in numerical vals 9,nf q rr(ec:pw1olf*c7hov5;aw m1ue in th;s vfmw,er1ofcqn 9ap * lo5c:(1whr7e 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 up into the air with a speed of 30.2 m g3*l d3yrjcv6/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 6 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 6.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what is the vq+.wf6wcs6bg-l3 e 5fw yz+ rgelocity at t = 1.0 s?

  In Fig. below, what is the velocity at t = ,ar k)/lgdm. c2.5 s?

  In Fig. below, what is the velocity at t qp6+hd1d4 mo e= 4.0 s?

  In Fig. below, what o nxruf2 2w(z.6d-kx6 xn8pzg0 1 bjmwis the velocity at t = 5.5 s?

  In Fig. below, what is the avergt8fb52bpfc ;sb7 i8bage velocity from 0 to 4.0 s?

  In Fig. below, what is the average velocity froud mkp/b1h6n+qh/ 5qy m 0 to 6.0 s?

  In Fig. below, what iss lw uoea;qs- k56lm*9 the acceleration at 1.0 s?

  In Fig. below, what is the acceleration at 3.0 r.,:v pv/jeki s?

  In Fig. below, what is the average accelerati0r9 jnt) l9xp;wuzk 1mon from 0 to 5.0 s?

  In Fig. below, what is the averabgw4zbw 2 scizd ; (g4axiy)3qv 86 gdy.;1ruxge acceleration from 0 to 8.0 s?

  In Fig. below, what n06i .l 0b gtw9usgl*dis the displacement from 0 to 8.0 s?

Does a car speedometer measure speed, velejr2h7o7 r+ f 3nhe6xsocity? {speed|velocity}

  An object can have a varying speed if its ve/m dhvgt4my 21,41 *oeeddik7f hm+ qflocity is constant.

  The velocity of an object can be negative when its accecf8d2w edw: 1d e 10z pw8-n/fkp3uxgsleration is positive.

  If one object has a greater s w0sv 52hk-vaur rc++pl.byy:peed than a second object, the first must have a greaterkwr-bvh0u lsy 5r2+ cav:p. +y acceleration.

  Two cars emerge side by side from a tunnel. Car A is traveling with a speed o6ahu+ksr m kge8ox9imx1gk*k./ )b 1izsr):e f $60 \; km/h$ 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 speed8jv1-( +uon)xp nspcn as its acceleration decreases.

  A baseball player hits a foul ball straight up into the air. It leavo cf+lpei-ks;f, r;7p es the bat wip ,c;f7l +sfo i;-keprth a 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, 8(rkqfa jdmxb59.ck ;f) xsvio ynz/ j)xd)7: how does it change if air friction ymb ad is/7rf:x5()ndj8kzjfx ) x) vqc9k. o;is ignored?

  As a freely falling cd2q n)vs p1(lobject speeds up, what is happening to its acceleration, how does it change if air friction CAN n(l21v) dq pcsNOT be ignored?

  An object that is thrown vertically c v6mbpggb)f 6t v1t45upward will return to its original position with the same speed as it had initially if air resistance is negligible. Ifgt btm6gfb1p6vvc4) 5 air resistance is appreciable, how will this result be altered?

  An object can have zero velocity and nonzero acceleration9i7 wd qqj5odu8 osr8v .-t(rx at the same time.

  An object can have nonzero velocity and zero acceleration at thebe-z4kr6 mhj1 same time.

  An elevator moving from the second floor to the fifth floor making no stops a h+)qoyzm9e/*qjtvtd/ u0zr6long the wa)z*vjmo9q t y60qr+edh /tu/z y has zero acceleration all the time.

  A rolling ball moves fr-1 h(g l7np8 dzidzo4iom $x_1=1.7 \mathrm{~cm}$ to $x_2=-5.6 \mathrm{~cm}$ during the time from $t_1=1.8 \mathrm{~s}$ 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 $t_1=-3.7 \mathrm{~s}$ is at $x_1=2.7 \mathrm{~cm}$ and at $t_2=3.0 \mathrm{~s}$ is at $x_2=7.8 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete laps ar 5x0) .rn;nh) maiaa64qqmphsound a quarter-mile ($1 \; mile = 1609 \; m$) track in a total time of 7.6 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, movic8i)g l hhi3)7vus/klng 88 m away in 8.1 s. It then turns abruptly and galh lukv 78g l)cih)3i/slops 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 g:uvoj7i8cz j) ui (.v$10 \; m/s$ to $23 \; m/s$ in 5.0 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 fromud2gg4.hcq 4lpb* - hg-lrqi4 $20 \; m/s$ to rest in a distance of 72 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must retwy6i xqsk6r;b u8 /2yy y8q+h2 2qazeach a speed of $26 \; m/s$ 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 abo :w3 bjkv+ddj.uj dwj.:vd3k b+t $10.9 \; m/s$ 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 uniformly from a sziit 9k +:g*+gb mk4 zfp*,wzi,o;maapeed of $17 \; m/s$ to rest in 4.99 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. Assumiedz;waya5/y 3fn*+g- kdvco 3ng a decelera3dd zco- af /;e3ynyg+5w*k vation of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck g 9imx+ig8kyb ju1v)0d o ,ynbp-68pad oing $25 \; m/s$ 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 mkae6(2; vgel5 vx06n ck wfrf26*wx poin. After exactly 27.0 min, ther25e w 6;kxvp0wgnr2x(ke* l6 6favf coe 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?    $s$