Suppose that an object travels from one point in space to another.:cozd59w) xi4et o0ny Make a comparison between the displacement and the d 4xd9 nc:iyow )0tzeo5istance traveled.

  When is the average velocity o492wl1 f-(ul cxddausf an object equal to the instantaneous velocity?

  A new car manufacturer advertiiyyyl kw ) 4b.4-d4kbvses that their car can go "from zero to sixty in 8 s". T4b4 .)kyvlb wyi -y4kdhis is a description of

  An object moving in the +x axis ev pxw+ya+8-sui e w 4swt.g2-p7:o gbaxperiences an acceleration of $2.0 \; m/s^2$. This means the object is

  Suppose that a car travexcb01 tnh1)t w4 la4pfling to the East (+x direction) begins to slow down as it approach watp )h1t0fc b44nx1les a traffic light. Make a statement concerning its acceleration.

  Suppose that a car traveling to the West (-x direcm:t.9s vim0z ktion) begins to slow down as it apptk0 m9 ivs:.mzroaches a traffic light. Make a statement concerning its acceleration.

  Suppose that an object is moving with a constant velocity. Make a ddgd2k dosh i s3/h6,9-r fg;ustatement concern9usdgs3d /hdfi -k,; 6h2dro ging its acceleration.

  If the velocity of an object is ze p;f;d x8+e /yzymun;fro, does it mean that the acceleration is zero? Support yourfy8ze;/f+ ; ;dy nxpmu answer with an example.

  Can an object's velocity change directi652gzy2lp9zh b xsda7on when its acceleration is constant? Supds alz9hxp65b 2y7z2gport your answer with an example.

  Suppose that an object isyz3fe2;m 5j fw moving with constant acceleration. Make a statement czfwym;e5 f3j2oncerning its motion with respect to time.

  Can an object have increasing speed while its acceleration is decreasinglg)tgnvl 65, wdsgk-(? Support your answer with an 6v5gk,tg)- n llg(dswexample.

  Suppose a can, after an initial kick, moves up along a swti:m +4zuaf )mooth hill of ice. Make a statement concerning its am4az:+t) ufi wcceleration.

  Under what condition is averagf.vi5o7qq :fxzxr9g t 5n6ro9e velocity equal to the average of the object's inoo69 zxg i rnf9xq5q:trv5 7.fitial and final velocity?

  Objects A and B both start at rest. They both accelerate at the same rate. Ho +6ntz- mdiyt3wever, o-t +d3itzyn6mbject 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 frq:mv efie6fce ovl 0q6f.(p/ 1om rest. They both accelerate at the same rate. However, object A accelerates for twice the. qe:6imcf v6f0eleqv1fo/ p( time as object B. What is the distance traveled by object A compared to that of object B?

  When an object is released f c1ub5luh7iv )4f3.e4i stkurrom rest and falls in the absence of friction, which of the following is tr 1ht7uc)u v 5rsb.i3e u4fik4lue concerning its motion?

  When an object is released from restqepkm +r+mtc tbsz71+ 689ucw and falls in the absence of friction, which of theb c6tz8+ pur1 mwq97+stkmec+ following is true concerning its motion?

  Suppose a ball is thrown straight up. Mag it0 fmvm w6x vu/mieypo z1/j,/84x7ke a statement about the velocity and the acceleration whe/ ofyxujm4 x e v1gtmmviw,p//06zi78n the ball reaches the highest point.

  Suppose a ball is thrown straight up. What is its acceleration just beforyo zew 8 zj4jfmo))a,9e it re9 oy 8w)zm4o)ajjf z,eaches its highest point?

  Suppose a ball is thrown straight up, reaches a max em2gjax) qix 1x8-tr+imum height, then falls to its initial height. Make a statement abou m)t xxrq 1ajgexi-+28t the direction of the velocity and acceleration as the ball is going up.

  A ball is thrown straight up, reaches a maximum height, then nu+;zey3u2 iw falls to its initial height. Make a statement about the direction of2z3i;uynw e+ u the velocity and acceleration as the ball is coming down.

  Suppose a ball is thrown downward in the aw -z3 6nr7h 7inpo45oe9f5fc9 lcrwixbsence of air resistance. Make a statement concerning its acceleration.736p e-ro9wfcfl z4iwho 7r55xc9n in

  Suppose a skydiver jumps from a high-flying plane. What 64r tpvfhp: (tis her acceleration when she she reaches terminal velopv6 h: 4rptf(tcity?

  A ball is thrown vertically upward with a speed v. An id omjlz .tn 1w 7gr52jdm(4*ucjentical second ball is thrown upward with a speed 2v (twice as fast). What is the ratio of the maximum height of the second ball to that of the rmn5jm (w l*u .jctdgz27j14o 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,b:9 nlfi6cjer7ulu // iifcjo2y 3xq +c7 4g6p ball B is dropped from the same building. As time progresses, the dis/ il7oluc/cebq juyc6r:27p4 jg 6+fif3in9xtance between them

  Ball A is dropped from the top of a building. One second later, ball B is drov,ox:: ip0uk mpped from the same building. As :k x:0u omiv,ptime progresses, the difference in their speeds

  Two objects are thrown from the top of a tall building.zu3t /y9kij 4 mg4xoo( One is thrown up, and the other is throx3jy 4uo9tm(i/kgz4 o wn down, both with the same initial speed. What are their speeds when they hit the street?

  A brick is dropped from the top of a bxd *di2xg/tjw2 0 )rd:ubjn2duilding. A second brick is thrown straight down from the same building. They are released at the same time. Negd02i:) udtxdw bjg2*xjn2 rd/lect air resistance. Compare the accelerations of the two bricks.

  An object is moving .8g09 lfoc e8rake(qv with constant non-zero velocity in the +x axis. The position (9eor.c 0ev8fgak 8 lqversus time graph of this object is

  An object is moving with constant non-zero acceleration in the +x a 0d2f(;ljzv(j-iu voo xis. The position versus time graph of this objectjo(i fz ;2vj-0du(o lv is

  An object is moving with constant non-zero velocity in the +x axis. The velocit ytg47 ewfgn;5xnv kqngm,)):y versus time graph of thiswfg;k vn:7 xg)5t )m,qnne y4g object is

  An object is moving with constant non-zero accele5(xu1 vzqz9c jration in the +x axis. The velocity versus1cqv jzx9u (z5 time graph of this object is

  The slope of a position versus time graph su:x)tkkf ,yd1ohh d03*s.hlgives

  The slope of a velocity 1e5,b jn-b konf g z3f(wv9i;gvkv.z. versus time graph gives

  The area under a curve in an accelerad .h*+k. do;c8;t0ajzoh5 tj j/e doartion versus time graph gives

  The area under a curve in a velocity versus p1q)evg(/anmat 2o sj q1c:7etime graph gives

  If the position versus time graph of an object is a horizon .(de5 qrr;npi6j xfn.tal line, the object nx.;5e r6(nj f.pqridis

  If the position versus time graph of an object is a vertical line, q;awa*g,ippyh sq);h 39). hg0nyv h tthe object ish)9ypv.ht3nw)q; *gaaps igq, h0 ;yh

  If the velocity versus time graph of w;za5:x56 hl 8 makfzran object is a horizontal line, the object z5hmz;akl8wxf r :56ais

  If the velocity versus time g3 u: u54l8j(oxt rseviraph of an object is a straight line making an angle of 30 degrees with the time axis, the objectol u:4t85s( uj3evrix is

  An object moves 15.0 m north and then 11.0 m south. .tl/ peq o5k;f:oy3ut Find both the distance traveled and the magnitudefl.epttk 53qu; ooy/: of the displacement vector.

  A boat can move at 30 km/h in still water.-gcay +nqry* : How long will it take to move 12 km upstream in a river flowiy:qg+c*ayn -r ng 6.0 km/h?

  55 mi/h is how many m/s? (i:)eq,qte .. r dd,kb:ovp3 /e k7uzih1 mi = 1609 m)

  What must be your average vr:sj rprb68)pat87t speed in order to travel 350 km in 5.15 h?

  A runner ran the marathon (altvw/0 h94pq z8zukm* pproximately 42.0 km) in 2 hours and 57 min. What ivtp*hzz 4mwq u0 /9lk8s the average speed of the runner in m/s?

  A car travels 90 km/h. How long does it take for it to travel 4e zcju . xbijff)+*l2.00 km?

  A ly (light year) is the distance that light tra bx- :-noxr/ ovksk9i v;mr,,avels in one year. The speed of l-k/v 9 r,ixvsa m:onk x,o-;bright 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 alon8ju y: /7s -x tlelroo1u32iqjg a straight road and you look to the side for 4.0 s, how l1-esqjj lu 83or:u2ioy /t 7xfar do you travel during this inattentive period?

  If you run a complete loop around an outdoor tracmgz 0br/q9m2 ak (400 m), in 100 s, your average a z0rgmqmb29/ velocity is

  A polar bear starts at the Nortlksilb85,lwq .wf 5*z h Pole. It travels 1.0 km south, then 1.0 km east, then 1.0 km north, then 1.0 km west towklqzw85 .5f*bl,s i l 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 travels 1.0 km south, d j+p ; 4t,cerp)sro:so/eu.e2qsq 4k then 1.0 km east, then 1.0 km north, then . u2o;+reest d4js ce:oqk4r,/sp )qp1.0 km west to return to its starting point. This trip takes 45 min. What was the bear's average velocity?

  You are driving home on a weeke( qnkhdv* w 5kdrn6/0hnd from school at 55 mi/h for 110 miles. It then starts to snow and you slow to 35 mi/h. You arrnhqnkw0v 65h r d*(kd/ive home after driving 4 hours and 15 minutes. How far is your hometown from school?

  A motorist travels 160 km at 80 km/h and 160 km at 100 km/h. What is the avesl4-ieuq8 b,b rage speed of thqus, i lb-b8e4e motorist for this trip?

  A motorist travels for 3.0 h at 80 km/h and 2.0 h at 100 km/h. What is her aver *:)l(ismb(agab(o os6. uqp gage (:sl)gb (si pa.*qgmaoo ub6( speed for the trip?

  An airplane travels at 300 mi/h south kt 6ewnd8 ap6,ls: p(v,/pwdkfor 2.00 h and then at 250 mi/h north for vnw6klkt(w p,eapd/ 6 d8,:ps750 miles. What is the average speed for the trip?

  In a 400-m relay race the anchorman (the person who runs the luptbn7s8 9 id4ast 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 of the race, in order that the team A runner not lose the race? sbup 4i8n79td

  A car decelerates uniformly and comes to p6wuq. h,-zhk g9u,y fa stop after 13 s. The car's average velocity during deceleration was 52 km/h. What was the car's deceh 6gpfu kw9q,hyu z-,.leration while slowing down?

  An airplane increases its speed from 100 m/s to 1p6dd 3 pnms23y82n7 x sfmz8yp60 m/s, at the average rate of p8sny 87my2 z2mpp3x n3sfdd6$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h akkgm v*y )30cw.r9w.dvu oyg,ccelerates 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 and7u9m u5cx,s6yyd 6jq pats2:b 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 thenr21d mu 7kqb, 6:hyemo speeds up with a constant accelerationm qb6oyrh 1um,d 2k:e7 of $2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial z-.*ggp /j ccuvelocity of 6.9 m/s experiences a constant acceleration ofcu. c/z*-gjg p $4.0 \; m/s^2$. What is the cart's displacement during the first 6.7 s of its motion?

  A bullet moving horizontally tos6npj *djmbw ; 4kxk)- the right (+x direction) with a speed of 532 m/s strikes a sandbag and penetrates a dist 6)dwnkjks *4mjpx ;-bance of 41.38 cm. What is the average acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is launched from a catapults *8oqyqazoj5 v.)osokxr( i2 nqf66. on an aircraft 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, what is th6 o qoo)8osz(xva i6q.fknj q5*y s2.re length of the catapult?

  A car starting from rest movesiit9+ ejy8ny3 h/ c3wh 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 80 m/s in a distance of 200 m. What is its averagq+ ej ld-aq75ye ac7aq+ eqdjly-5celeration?

  An object starts from rest/fu dln vnr0sncz /(37,- zkun and undergoes uniform acceleration. During the first sk u3,/ns fc(zrn -lu/7zvndn 0econd it travels 8.0 m. How far will it travel during the third second?

  An object is moving in a straight line with 6 ue): 7hv(azlkk4unsconstant acceleration. Initially it is traveling at 16 m/s. Three seconds later it is traveling at 10 m/s. How far does it move during this tksu6lu)kav :z he(7n4ime?

  A car starts from rest and accelerates unzf3-i;jy 6if *owhn iqrv67c;q/- xj ciformly 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 can decelerat jgr32yrt pttvm,3) +it ok*c4e 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 t78 nll: xo*lq y1tl;wti(bx- uurns green, a car that has been waiting at the intersection starts ahead with a constant acceleratt:-qoiblu* ywx;t7 8 l1nl xl(ion 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 on 6kgui+n ct0w (the surface of planet X where the acceleration 0+n(w6ugc i tkdue to 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 surface of planet xai;.4.1uaueq,tsvf k /fbr6 X where the acceleration due to k;s t .4 be./uqu6,farvaxif1 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 planet qd)w92 c4lh akX where the accelera 2dc9ahlk4 )qwtion 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 spee oddq74x91.z lq0twkzd of 14 m/s on the surface of planet X where the ac0kd1 9z.tqoqx7d lwz4celeration 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 rulz cr.yk1wa wa4 3vw+9aer between your fingers and releases it without warning, how far can you expect tha4rwwzw1kc+y9 a va.3e ruler to fall before you catch it?

  A ball is thrown upward at a velocity of 19.6 m/s. What is its velocit4mofq2d/i;swz yw1y y koe;;/y after 3.00 s?wwizo2;fym/ 4d y; q/sye 1;ko

  A bullet shot straight up returns to its starting / iu, k4szhml1dgouklbs1p- uc5g9*0 point in 11 s. What is the initial speed of g, /k p ud04k95u1hszbc*1ug- lmsio lthe bullet?

  A ball is thrown straight up wvdchx-wlz u6q.r(xzj *0a2si +.e/optw b y4-ith a speed of 36.0 m/s. How long does it take to return to its szqe*js4yl cdhw.(/bxpv+-i o-rxt.w60u z 2 atarting point?

  A ball is thrown downward from the top of a building wl) hnt+6 huj3+wzr+ioith an initial speed of 8 m/s. It strikes the ground after 2.4 s. How high is j o )wuzht+ h+6+r3linthe building?

  A ball is thrown straight up with a speed ob8mi+ki1yg2.8rqf ,bx b5loof 30 m/s. (only fill in numerical valuxloby5 2qiiobg,r 1mf+k.8 b8e in 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 up into the 7vvsski5 p 24fa o+7adair with a speed of 40.4 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 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 is the veltqbnz stbty9b- :ek0c er3:wwx*1/ sv9/uu -hocity at t = 1.0 s?

  In Fig. below, what is the velocity at t = 2.)m5l as(y rlb25 s?

  In Fig. below, what 8eklvl(6 n+ 3rlaeis4is the velocity at t = 4.0 s?

  In Fig. below, what is the velocitc w90ofdyyb 3n0x+g6ey at t = 5.5 s?

  In Fig. below, what is the at0xq2:u-x(egduw9 fbverage velocity from 0 to 4.0 s?

  In Fig. below, what is the a kw4-sr*kb/rfverage velocity from 0 to 6.0 s?

  In Fig. below, what is the acceleration at upo0o 1gsem /nyac)h*w93ip21.0 s?

  In Fig. below, what is the acceleratmf2qp ,ool-z;ion at 3.0 s?

  In Fig. below, what is the average acce2 ldwegr6z1(m u. elru uw.y1(zji11pleration from 0 to 5.0 s?

  In Fig. below, what is the1ln-amg 4p ldm+4rtk6 average acceleration from 0 to 8.0 s?

  In Fig. below, what is the displab-2s + g*ngpwv0nf-bqcement from 0 to 8.0 s?

Does a car speedometer measure speed, veloci.zx/i5mvo6cww ,fcf 5 ty? {speed|velocity}

  An object can have a varyinwn1w) 9a(aij2py oz (xg speed if its velocity is constant.

  The velocity of an object can be negativegp56ew) *au-1zgk9a z jfouj4 when its acceleration is positive.

  If one object has a greater speed than a second0lc20fudl;. q ds+l no object, the first must have a grf0ldc;q 20o+l.u nsl deater acceleration.

  Two cars emerge side by side from a tunnel. Car A i)j*b mes)kg5p4 uaky3s 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 increaslxj n+ 4,.aqy 5 kmrm+ fh0gl3/hju*cling in speed as its acceleration decreases.

  A baseball player hits a foul ball straight up into the air. It lea4(5 5ewo6x8 9qns4mwr7g aiw w:ol haqves the bat withm7qwgw(ql5w s rn9:54 aai8 w6o 4hexo 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 hac26-0 xal m7ll42evvfemz. gz/k 4cu gppening to its acceleration, how does it change if air friction is ignor zk2v7fz0glec x44lgcem-al 2mv /u6.ed?

  As a freely falling object speeds up, what is happening to0h( r mwfhmz9 , z-4s6yky:vkp its acceleration, how dy hz9mvy,6(0 :mrkkf4- h szwpoes it change if air friction CAN NOT be ignored?

  An object that is throu(wwysf99t rd b0x0r oahe: 2;wn vertically upward will return to its original position with the same speed as it had initially if air resistance is negligible. If air resistance is adt(y0 0aewbw9 ou;9shr:f xr2 ppreciable, how will this result be altered?

  An object can have zeaxg yy, 69o*okt8 nd9kro velocity and nonzero acceleration at the same time.

  An object can have nonzero velocity and zero acce *xc.:eq+jhun5luf6bzh 9 y 9rleration at the same time.

  An elevator moving from the second floor to the f(c+4 gr1h )jbu+ bvjbaifth floor making no stops along the way has zero+gcjab hb+j4)u( 1v br acceleration all the time.

  A rolling ball moves from q)0oelapusbk s g.6 d q0:bn5ud*.w9k$x_1=2.7 \mathrm{~cm}$ to $x_2=-6.2 \mathrm{~cm}$ during the time from $t_1=1.9 \mathrm{~s}$ 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 $t_1=-3.8 \mathrm{~s}$ is at $x_1=2.8 \mathrm{~cm}$ and at $t_2=3.8 \mathrm{~s}$ is at $x_2=8.4 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete laps q,101 dem rku coz7r+baround 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 98 m away i2jtg682 :p*bng wuxvxfz5c382j wyhf n 11.4 s. It then turns abruptly and gallops halfway back in 4.6 s. Calculate (a) j*f 3hzwcw6gxf y8x2n: b2jut pg52v8its 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 frolz2x/a 1oi ir/m $12 \; m/s$ to $24 \; m/s$ in 5.6 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 .l04sn mah+ildran;-n cp8q2 u r3a0t$21 \; m/s$ 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 sp rpw)wu,r1p)u1 hsq4 ceed of $32 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $2.9 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinter can burst out of v nb 1c*zc*4pw9 9rahuthe blocks to essentially top speed about cbucn warhv4*199z*p $10.5 \; m/s$ in the first 14.5 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 frjc0-kymgq +c (aor1 gd/1uoz8 om a speed of $19 \; m/s$ to rest in 5.11 s. How far did it travel in that time?  (数值)  $m$

  In coming to a stop, a car leaves skid marks 92 m lo6en 3.g i)y8uuc bfb4slx(pb 7ng on the highway. Assuming a decelera.u7l 3ybs4 ci8f n( uex)bg6pbtion of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck gljs5xu6u i ,:7 k7gexf 8mx7u/j)tpfw 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 min. After e) m0sm973 usv3hyei 19ps uoflxactly 27.0 min, there are still 1100 m to go. The runneu pusvmi0 l)s3f3h19 meo9y7sr must then accelerate at $0.20 \; m/s^2$ for how many seconds in order to achieve the desired time?    $s$