Suppose that an object travels from one point in space to another. Make a co*9,g u5 cl ws-dqcogl:bv p6(amparison betw(ql c5p 6a-s:gwvodcl, g*9bueen the displacement and the distance traveled.

  When is the average velocity of an object equal toqd4vr 6cxg ,n. the instantaneous velocity?

  A new car manufacturer advertises that their car can go "from zero to sixty in 4rw9n0y ,azjre -i6qa8 y4a6r rn q eza-j,9wi0s". This is a description of

  An object moving in the +x ajpwo+*zgqpcz) 4qo5 uj: uc,;xis experiences an acceleration of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to the East (+x uchde62y7m d - qrf.1tdirection) begins to slow down as it approaches a traffic light. Make a statement coddqm-6yf c7 .e2tuhr1ncerning its acceleration.

  Suppose that a car traveling 5m.ag) d(itlj to the West (-x direction) begins to slow down as it approaches a traf5(gm a.ldt i)jfic light. Make a statement concerning its acceleration.

  Suppose that an object is moving with a constant velocity. Make a se.e; ivd 8st* kd07m;)9azcg (gfwxumtatement concernigu ;i)kze;ve*0 f.st g7mdda8(xwc9mng its acceleration.

  If the velocity of an object is zero, does it mean that0e bm :b6edtkx bne5,* the acceleration is zero? Support your answer with an examnbte x5 ,:06debbkm *eple.

  Can an object's velocity change d z1ps 8r2x.wgvirection when its acceleration is constant? Suppvw81xzgr s 2p.ort your answer with an example.

  Suppose that an object is moving w) ;,zeh*fxgq 9qa ne)spc-eb+ ith constant acceleration. Make a statement concerning itsaq)qp,9c-g*ze+) xb es e;f hn motion with respect to time.

  Can an object have increasing speed while its acceleration is decreasin5 e anfie r:d0k0vnhq;+( tb/ng? Support 0inkhv:ne(rdt fq+;0b a5/n eyour answer with an example.

  Suppose a can, after an initial kick, moves up along a smooth hill nxnac gb74x qq9 0,o(fof ice. Make a statement concerning its accelerataq0,oxg9 4 7bcnnq( fxion.

  Under what condition is average velocity equal to the avs. 5s0 2+4qafx qs kfb:ab/sleerage of the object's initial and final veloeba2kx .b sq:ss/0q4 fasf+5lcity?

  Objects A and B both start at rest. They both accelerate at the same rat l lrn3 ztjgfqa3 :aj+b7ey3+u,3qkb;e. However, object A accelerates for twice the time as object B. Wh gfk ra3a+3jl; 3j ble,ntu+b:yqzq37 at is the final speed of object A compared to that of object B?

  Objects A and B both start fromidt hqz a1/ q6no.-t9sh,o 1oqx.l,yc rest. They both accelerate at the same rate. However, object A accelerates for twice tqs,1x 6id.1.tlhzo no9 ,qctaq-/hoy he 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 fric o f)v9.zfv s14vpb(uttion, which of the. sufz(o 1vfvbptv4 )9 following is true concerning its motion?

  When an object is released from rest and falls rfbyn7*x ga +ig5a (w2in the absence of friction, which of the following7 +g (yn*fa2r5xgbi aw is true concerning its motion?

  Suppose a ball is thrown straight up. Make a statement about the velocity pod2xa6ht*x-gr *0lo and the h0a 6rl** pg to2o-dxxacceleration when the ball reaches the highest point.

  Suppose a ball is thrown straight up. What is its acceleration just b 62yth)vcny. jq v0s-aefore it reavj t2h.q) sa0-n6vy cyches its highest point?

  Suppose a ball is thrown straight up, reach hsp-umbmlg,1 sa j;:zs,/j8h es a maximum height, then falls to its initial height. M,gm s:zl msb1;,-ah8phujjs / ake a statement about the direction of the velocity and acceleration as the ball is going up.

  A ball is thrown straight up,,4dzalb10mg +g) cre-t lm. cb 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 c-ebc m l)b41+dmlgtag r0,.cz oming down.

  Suppose a ball is thr5 2ekvtit; u-0)oih(n* lnxza own downward in the absence of air resistance. Make a statemen0z(- o) vi*a5xik ht lu2;nntet concerning its acceleration.

  Suppose a skydiver jumps from a high-flying plane. What is her acceh rj74m1d,g-ywc hm ,oleration when she she reaches terminal wch4y,- 1d,ohrjmm7g velocity?

  A ball is thrown vertically upward with a sf3nc mw*1od*q peed v. An identical second ball is thrown upward with a speed 2v (twice as fast). What is the ratio of the maximum height1 *mn3cd*fwqo 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.j/howhx*-yflw j0 wr eni-1) - One second later, ball B is dropped from the same building. As time progresses, th0ij fy-h/n*)jox 1w-r -h wwele distance between them

  Ball A is dropped from the top of a building. One second later, ball fa*o9+0 zhds lB is dropped from the same building. As timf*a l9dhzs +o0e progresses, the difference in their speeds

  Two objects are thrown from the t* 9*bbgj zr1g hr- zgu4+kqb-oop of a tall building. One is thrown up, and the other is thrown down,bjgu*14 z +-h-qrrgo zbb kg*9 both with the same initial speed. What are their speeds when they hit the street?

  A brick is dropped from t6j+glye do.l ch)votx 6.g m+(he top of a building. A second brick is thrown straight down from the same building. They are released at the same time. Neglect air resisetml +(.6.6o xv+ ghyjo d)glctance. Compare the accelerations of the two bricks.

  An object is moving with consevvbi p 1q-ki3otq .kx*rq zw*;m ;0s.tant non-zero velocity in the +x axis. The position versus time graph of thisoipqwk ;3qv-r k0t1 . v;seqx.mbi* z* object is

  An object is moving flib v/(c.uf b*2 d+mnwith constant non-zero acceleration in the +x axis. The position versus time graph i .bv+2df/lc b(*nmuf of this object is

  An object is moving with constant non-zero velocity in the +x axis. The velociy4acbc cv*na6:4zk ,nty versus time gr6n,:cabcn az y c*44vkaph of this object is

  An object is moving with constant non-zero acc .h;0(ag5n wf:fmfb afeleration in the +x axis. The velocity versus time graph of thah. gnb f:wf0a m(f;5fis object is

  The slope of a position versus time graph giveq/sab; .u+*++k dym*jgudgg /t.hqky s

  The slope of a velocity versus time graph gives.b vu* jof,jlk/o 2p*f

  The area under a curve in 4 qg .r 54jrrhbly-dufh0)ib4 an acceleration versus time graph gives

  The area under a curve4,m ;+dxnn:-fwg nsp/u 5n wdt in a velocity versus time graph gives

  If the position versus time graph of an object is a horizontal lm)z 9m0m:oxbp ine, the object 9 zo)pm:bm0mxis

  If the position versus time graph of an object is a vertica,+ b:ghptr-dae jn( p5l line, the object is5prbp ta( dhn +,j-:ge

  If the velocity versus time graph of an object is a horizontal line, txhh1oah 2,pi; he object io 1h2p;h,axhis

  If the velocity versus time graph ow:+.z kglqafnjqe)72f an object is a straight line making an angle of 30 degrees with the time axis, .ewanzqfk:+qg l7) j 2the object is

  An object moves 15.0 m north and then 11.0 m south. Find bo7 rgo:-3vvkim th the distance traveled and th3- o:mkrg7 vive magnitude of the displacement vector.

  A boat can move at 30 km/h in still water. How long will it tamw)+ pfn57 yffke to move 12 km upstream in a river flowing mp 5fnfyw f)7+6.0 km/h?

  55 mi/h is how many m/s? too2c v a7r94k(1 mi = 1609 m)

  What must be your average speed in order to97m lwi0 uy9q+t4zlfv travel 350 km in 5.15 h?

  A runner ran the marathof3hfz. kw*9 nx48qstj n (approximately 42.0 km) in 2 hours and 57 min. What is the average speed of the runner in hjf 38 s*qw4 kf9n.zxtm/s?

  A car travels 90 km/h. How lo1htfhcub:+khm2- bg.amz8 g*ng does it take for it to travel 400 km?

  A ly (light year) is oa,j 2dupg04saj04w f the distance that light travels in one year. The speed of ligf44d po00aajsuw,j 2ght 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 n1h m d.lxwed(*u*s 1kkm/h along a straight road and you look to the side for 4.0 s, how far do ywlh*e 1m*1.sd(x knd uou travel during this inattentive period?

  If you run a complete loop around an outdoor track (400 m), in 100 s, your adzk u9wn 6b3b;verage velocity is zb 6n3;w9dukb

  A polar bear starts at the North Pole. It tr ibv o,3 4z7,eqahsxb0avels 1.0 km south, then 1.0 km east, then 1.0 km,34hb0s 7 bv,qozaxi e north, then 1.0 km 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 tra3l53mty1r mrn 6a/+y yikm.fxvels 1.0 km south, then 1.0 km east, then 1.0 km north, then 1.0 km west to return to its starting pointy .3riakrfl6y y+5m/3nt1mx m. This trip takes 45 min. What was the bear's average velocity?

  You are driving home o73c)xlhcbg,5gi p)t.xrec7 / 8pxthen a weekend from 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 17)xp,7 8el3hb g5/ rtx ic).ephc gctx5 minutes. How far is your hometown from school?

  A motorist travels 160 km at 80 km/h and 160 km at 100 km/h. Whag:vvsb,wan 6g1kei 4tz jy-03t is the average speed of tgikb64va3ntw e z:1 ,s 0-jvyghe motorist for this trip?

  A motorist travels for 3.0 h at 80 km/h and 2.0 h at 100djrrpq ,j2.6qszb k fc12 5c/r km/h. What is her average speed for the tribrr1qpcf .6j2rcq5 2d/sk j, zp?

  An airplane travels at 300 mi/h south for 2.00 h and then at 250 mi. jdv70aujkw h3z.1hu h6uog: /h north for 750 miles. What is the average speh:huudwj.zv.j1 ao6u 37hgk 0ed for the trip?

  In a 400-m relay race the anchorman (the person who runs the last 100 m) forw hm+d,grk(h x7.lnp- 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 tepdg(krh+mx7n hw ,.l- am 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 10 s. The/ t8hyynjnepll a 8* qi8m898u car's average velocity during deceleration was 65 km/h. j8h9lp*q8 y8ytm8l8inue an / What was the car's deceleration while slowing down?

  An airplane increaseb;fsv ut8rr 2 *tty-j w*i27j6cpc; ors its speed from 100 m/s to 160 m/s, at the average rate of ;o7s b-r2yr c6;ticw *ut8tf jvrp2 j*$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h accelerwt;ccfu3i .u, ates 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 and acceler*q-45v 5v. gssjj7qd kmg;gjdates 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 accelerak qt+sp-(0be3czid0 u tion ofbkq 3u -tcep siz(0d0+ $2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial ve:e+.oyh ki+sw locity of 7.7 m/s experiences a constant acceleration o wy hks.++oei:f $4.7 \; m/s^2$. What is the cart's displacement during the first 8.0 s of its motion?

  A bullet moving horizontally to the righl( d;g/a9n1k cj xy jt69jxqp;t (+x direction) with a speed of 526 m/s strikes a sandbag and penetrates a distance of 12.59 cm. What 91d/kp6y j c;xxq(n9; la tjgjis the average acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is launched from a catapult on an aircr bu9i 06*ux8n qmu8omeaft carrier. 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, w i808mu6xu*q uo9nme bhat is the length of the catapult?

  A car starting from rest movesydj -5gg4vm:;d o(lc b 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/vmv28 0:(c pattc/ nqq i(u4gds to 80 m/s in a distance of 200 m. What is its average acceleu(a tt8c/4vin m02c pv:g dq(qration?

  An object starts from rest and undergoes uniform gb(p xo n62+blacceleration. During the first second it travels 3.8 m. How far will xnbo+ gp(b2l 6it travel during the third second?

  An object is moving in a straight line with constant acceleration*v pak2ehdm xkmskpgj f7 w3,:;d+c +w;*5 puk. Initially it is traveling atc7* ;kkj5gd+:mppawxsv2; u pdk*hm,w+ek f3 16 m/s. Three seconds later it is traveling at 10 m/s. How far does it move during this time?

  A car starts from rest and accelerates unif,5. s-fgcgih2h hiz2xormly 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 rok km f+-1 niwh76epb;dy4 mc2xad 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 bw/ 0skqr; fq,that has been waiting at the intersection starts ah qbf, w/;q0ksread 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 upward4i*io9sbr 9w b with a speed of 12 m/s on the surface of planet X where the acceleration due to 4brb s* oiw99igravity 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 smn. -nw.czg. planet X where the acceleration due to gravity isc.g.n .ns -mwz $1.5 \; m/s^2$. 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 planet X w2i* og 7yjqbap8rj4;c he7r;*j o yg4icq82pbj are the 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 of 14 m/:ef(z;soza l : nn9eq/s on the surface of planet X where the acceleration due to gravity iq zn:zanel: f9eo(s; /s $3.5 \; m/s^2$. What is the speed of the object after 8.0 s?

  Human reaction time is usually greater tha,/a z7uex/yarn 0.10 s. If your friend holds a ruler between your fingers and releases it without warning, how /ae/y ur7a,xzfar can you expect the ruler to fall before you catch it?

  A ball is thrown upward at a velocitvk7:kqlw 4iei, h1.1la- uaagy of 19.6 m/s. What is its velocity after 3.01 qa.kl7i 4w,1uh :-le avgika0 s?

  A bullet shot straight up rbqtkkw-fiy)4djkjwf -( 2 o- 8eturns to its starting point in 6 s. What is the initial spe8t42dbi-) w(wjfk- q y ko-fjked of the bullet?

  A ball is thrown straight up wi .5(/d2o rblc fapi1drth a speed of 36.0 m/s. How long does it take to return to its5b. /p2adrl(froid1c starting point?

  A ball is thrown downward from the top of a building with an ij5g4su ( joxmku3jc glu76/) gnitial speed of 5 m/s. It strikes the ground after 7.6 s. How high is jjs u6uc (kl 7 4jx)/3g5mouggthe building?

  A ball is thrown straight up with a spoa49p 82+ce0q4 gd gi flq-xyutvn eo0-,j0jyeed of 30 m/s. (only fill in numerical value in the jlq0 e-i9, fqy 8vtca nju-yx04e4gp2 d+g0oo 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 (tzt(wkvfsn *4i .g9t with a speed of 23.3 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 1 seconds later.  (数值)  $m/s$
(e.) Determine the time at which the ball pass a point 8 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 8.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what twftctnn;rdl vpp 5 xwc9.:0bv+ j8-. is the velocity at t = 1.0 s?

  In Fig. below, what is the velocity at2r.e*k;d cv qr t = 2.5 s?

  In Fig. below, what is the velocii;:uovg+r of bl5u,oa v0j*v- ty at t = 4.0 s?

  In Fig. below, what is the velocity at t = 5.5kbm l;+am/)bg s?

  In Fig. below, what is the average velocity 4z :3 p8g yy0tfda; px4vmm/xx5dill1from 0 to 4.0 s?

  In Fig. below, what is the average velocity from 0 to 6.0 s?j4*pkk p5hoo v1.3zx k

  In Fig. below, what is the acceleornv7h j/3cqqe /r v29v/92pd2dv ysaration at 1.0 s?

  In Fig. below, what is the acceleration at 3.07 hlg8+sqosdq 6 /bk7b s?

  In Fig. below, what isq 6ydje ; il,pg2k9:au the average acceleration from 0 to 5.0 s?

  In Fig. below, what is the av l+. 9d*0m eqbp;hxafrerage acceleration from 0 to 8.0 s?

  In Fig. below, what is the qsacm wcg8v -0g :13npdisplacement from 0 to 8.0 s?

Does a car speedometer measure speed5p,;ygq lc u c35sxzs3, velocity? {speed|velocity}

  An object can have a varying speed if its velocity is constab9jnzog.krafbn ( g5kc8ea0 9q7jf,(nt.

  The velocity of an object can be negative when its accele l1ktl :yq;7mfration is positive.

  If one object has a greater speed than a second object, the first muf,zt5c.;jq vy 34wnop st have a greater .c3jp vfq4zy;,5 ownt acceleration.

  Two cars emerge side by side from a tunnel. Car A iqi3:(mm dgf.ts 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 acceleration dx*odb 0zdo)-jgb+f i -ecreases.

  A baseball player hits a foul ball straight up into the air. I;f1;l1z mejmhu 5;ddo t leaves the bat w; 1de;1u ;hmmlo5jdfzith 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, whahy7rwe3dm4 v . +5urcnt is happening to its acceleration, how does it change if air c .d 75wvrey4mu+n3rhfriction is ignored?

  As a freely falling object speeds up, what is happening to its acceleratibp /mc 3iu,1nra-)p5lzv/0zq3z. wdhn nawj7on, how does it chan5.nanqh dz03,lwm/ac v/)z1 zwj pnp7b 3ir-uge if air friction CAN NOT be ignored?

  An object that is thrown vertically upward will return wlvu845d(xmtlgm. 0v to its original position with the same speed as it had initially if air resistance is negligible. If air resistance is appreciable, hux(l ml4gmd8 wt.v 05vow will this result be altered?

  An object can have zero velocity and nonzero accelecof+bca1: efkf-z-kt)srg : ;ration at the same time.

  An object can have nonzero velocity and zero acrji.-itbb0ep*p m mni k6,, 6gceleration at the same time.

  An elevator moving from the second floor to the fiftlz oqp y1rz.f8hq/);h o.jl y8h floor making no stops along the way has zero acceorlpo8z1 q).zyqlh fh; /y.j8leration all the time.

  A rolling ball moves from 8tw/ jur3zar-$x_1=2.6 \mathrm{~cm}$ to $x_2=-6.5 \mathrm{~cm}$ during the time from $t_1=2.9 \mathrm{~s}$ to $t_2=5.6 \mathrm{~s}$. What is its average velocity?  (数值)  $cm/s$ (only fill in numerical value please)

  A particle at $t_1=-2.3 \mathrm{~s}$ is at $x_1=3.2 \mathrm{~cm}$ and at $t_2=4.4 \mathrm{~s}$ 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-mi2 b h19uu.ra -mmq 2mwcg6;ccgle ($1 \; mile = 1609 \; m$) track in a total time of 7.5 min. Calculate (a) the average speed  (数值)  $m/s$ and (b) the average velocity    $m/s$

  A horse canters away fro 6xnnez2oql9ff21 cz;m its trainer in a straight line, moving 97 m away in 11.4 s. It thenfnzq6oc 1n e2x ;9lzf2 turns abruptly and gallops halfway back in 4.6 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 frr+y0 gelyzg1- om $10 \; m/s$ to $25 \; m/s$ in 5.3 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 from n (7h8zccalr/q( i ,cf$17 \; m/s$ to rest in a distance of 61 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reach a spbib1,6:-bsc ef(pqm seed of $28 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $2.2 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinter can burst out of the blocks tf 0h9w 8n+/o5 pbjgfxyo essentially top speed about5 xnwo phf8+g0/ bj9yf $11.1 \; m/s$ in the first 14.6 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 unifo;c3psuyqt4)*sn ;mqq rmly from a speed of $15 \; m/s$ to rest in 5.86 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. Assumin2 od3 .)fb:n rcts4kcxg a 4c2k)tbrcn d 3.s:fx odeceleration of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck goin7p99d: * vkhdq-b9kqtx5j*u 3zu hugo g $25 \; m/s$ 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 mi92b4zqv,ksa n n. After exactly 27.0 min, there are still 1100 m t2 akn ,4sv9qbzo go. The runner must then accelerate at $0.20 \; m/s^2$ for how many seconds in order to achieve the desired time?    $s$