Suppose that an object traveg9t jzdlnw4)3n. qd 6 jra,2onls from one point in space to another. Make a comparison between the displacement and the distance qw)nda4 l63nn jt,9d 2z.jg rotraveled.

  When is the average velocity of an object equal to the inca n9/d,fq:+dytu 6(t j 8em:p*qfqspstantaneous velocity?

  A new car manufacturer advertises that their car can go "from zero w9vco h:m f.7bto sixty in 8 s". This is a descriptiofh9 wmv: .7obcn of

  An object moving in the +x axis expec; :u z;ihet ug9p /k5rzs5aq0riences an acceleration of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to tmxn+ *)b r.- kvan/koahe East (+x direction) begins to slow down as it approaches a traffic light. Make a statement concerning its acceleratio)m r+ao*x/.nknb-va kn.

  Suppose that a car traqn tabmt 9yz4o h.*18lveling to the West (-x direction) begins to slow down as it approaches a traffic light. Make a state t 98*btml4yaoq1n. zhment concerning its acceleration.

  Suppose that an object is moving h9 o mm-b83vgcwith a constant velocity. Make a statement concerning its acceleratmg m9ch-83ob vion.

  If the velocity of an object is zero, does it mean that the accelerati 9pzptex)5; txon is zero? Support your answer with an expzx59 t)ep; txample.

  Can an object's velocity chws((x )xt6dz xange direction when its acceleration is constant? Support your answer with an examplezx)(6xwxds (t.

  Suppose that an object is moving with com+hzt3,gs m h1g(rcg lhxy3b7y w6f5(nstant acceleration. Make a statement concerning its motion with 5gycw6 lgy71z ghf xmmht+ bh3r ,3(s(respect to time.

  Can an object have increasing speed while its acceleration is decreasing? Sj ftz/:1)xtuy1;hyj kupport your zykj)1;: 1jxht yfut/ answer with an example.

  Suppose a can, after an initial kick, m8y8 wlps7o njx.a.xx-oves up along a smooth hill of ice. Make a stateme.al8x xwjxy7 o.sp8n- nt concerning its acceleration.

  Under what condition is average velocity equal to the average of the obj 6f,j j7izxu59gx4cysect's initial 4x,9 j zyfj csgx7i65uand final velocity?

  Objects A and B both start at rest. 7 i6,oxy4te7 iumh:tk 1uj5saThey both accelerate at the same rate. However, object A accelerates for twice the time as object B. What is the final speed of object A compared to that k7esm: yo6j1u,5xuii7th4 taof object B?

  Objects A and B both start fs-kr )yd4np l4rom rest. They both accelerate at the same rate. However, object A accelerates for twice the time as object B. What is the distance traveled by object A compared to that of object4lyrp n)d s4-k B?

  When an object is released from rest and q:m(s9+nfaoy falls in the absence of friction, which of the follo(m9ns afyq+:o wing is true concerning its motion?

  When an object is released from rest an,ex qtm4n nany/ 1(ww)d falls in the absence of friction, which of the following is true concerning its ma w,/mynt(nnxw )41eqotion?

  Suppose a ball is throcpv/00fyhcf2j m x o;xh658ugwn straight up. Make a statement about the velocity and the acceleration when the ball re5y/o ;m2ffc 0xuxjvg6 hp8 h0caches the highest point.

  Suppose a ball is thrown straight up. What is its acceleratio uoe6ah)p6m:l 6hw pvlc 49(xan just before it reaches its highe (luphm9x)6aw :v66pce4l oa hst point?

  Suppose a ball is thrown straight up, reaa5( nx3eu :uhfches a maximum height, then falls to its initial height. Make a statemu :h35 xe(unafent about the direction of the velocity and acceleration as the ball is going up.

  A ball is thrown straight up, reaches a maximum j5 5 bsyucctn.) s0ex*height, then falls to its initial height. Make a statement about thesct)*n5 b.e5 cy 0xsuj direction of the velocity and acceleration as the ball is coming down.

  Suppose a ball is thrown downward in the absence of air resistance. Mgf82n)(gqc 9v u p6fgjkqm u;:ake a statement concerning its accf9fpm;(jc6 8q gu)un:v gq2k geleration.

  Suppose a skydiver jumps from a high-fly+ 0 ijiq:p :v:ydpos(ting plane. What is her acceleration when she she rt+:od p:vyjq s(0iip:eaches terminal velocity?

  A ball is thrown verti-z )okx 71vl6+i2ykanwobdz /cally upward with a speed v. An identical 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 first ball? (How many times higher does the second ball go than the f +7x-ownkldz v)oyz6 ki21b/airst ball?)

  Ball A is dropped from the top of a building. One shelueh o z(j68 a2(ls3econd later, ball B is dropped from the same building. As time progresses, the distlhuoe(a (jzhe68 3s2lance between them

  Ball A is dropped from the top of a buil 6f.yo;z ul 5c7ooouhjexn3 22ding. One second later, ball B is dropped from the same building. As time progresses, the difference inzfuojhl o 53 xycoe;.un2 267o their speeds

  Two objects are thrown from the top of a tall buiio2)l, x meou80gq yz*lding. One is thrown up, and the other is thrown down, both with the same initial oe8,zqi0o2m )xlg *yu speed. What are their speeds when they hit the street?

  A brick is dropped from the top of a buildimf--o,n.5 p 0.era lmymksyzy.uk-ye9,9ulang. A second brick is thrown straight down from the same building. They are released at the same time. Neglect air resistance. Compare thmu-pmn.99 ..mauey5,-loske,l z k yaf0r yy-e accelerations of the two bricks.

  An object is moving with 0vocf97oyml.j *:z y mconstant non-zero velocity in the +x axis. The position versus time grafmoj: 9v y zlc.70my*oph of this object is

  An object is moving with constant non-zero acceler0 6k2c;gyfcl ration in the +x axis. The position versus time graph of this object k lryccf2g0 6;is

  An object is moving with 5h9uif cq/ d klm8n5to5qb +2tconstant non-zero velocity in the +x axis. The velocity versus time gra8d5bqnko9h/qt 5 2i cf+mt 5luph of this object is

  An object is moving with constant non-zero acceleration in the +x axi262clt* aga sqoiil( 6s. The velocity versus timiil6ag (62* qcaots 2le graph of this object is

  The slope of a position ve r56t7 -kaoq6 ctf.mw/9ckj pn0y,onrrsus time graph gives

  The slope of a velocity versup/kh(72r v dhn0n.f sts time graph gives

  The area under a curv bybxl.gi 17- c8ot)mwe in an acceleration versus time graph gives

  The area under a curve in a velocity-l+1brfk(kyhz/pm x* versus time graph gives

  If the position versus time graph of an object is a horizontal line, the obpl r,a;vn- *ynject isv*yla-nrnp , ;

  If the position versus time graph of an object is a verticakd(c0;-m 6wgbq)wifpva 0 y c9l line, the object is6;00qwfcp 9vmiak byd c(g)-w

  If the velocity versus time graph of an object is a horizo 7n;(ulqx ut-r6 o3rxxi6a2bhntal line, the object x-6una x7 ;xlio 2rb(qhut6r 3is

  If the velocity versus time graph of an object is a straight line m dvpo aw43+v1uaking an angle of 30 degrees with the time aop a41vw vud3+xis, the object is

  An object moves 15.0 m north and then 11.0 m south. Find bot 1p(v1)njqgci7ucf9ewa;h ,hrs70gn h the distance traveled and the magnitude cu1g;s7g7 h9 f rajci0,pnehqw (v1n)of the displacement vector.

  A boat can move at 30 km/h in still water. How long eklictf8i/m: j i6.m;a b:8xqwill it take to move 12 km upstcmb8qk/ j 8itf am.;:ei6:lxiream in a river flowing 6.0 km/h?

  55 mi/h is how many m/s? (1 mi = gq0c+g) 2e5 ksx ml4id1609 m)

  What must be your average speed inkdij 0,2 j6kt- ekyc3/d nl,be order to travel 350 km in 5.15 h?

  A runner ran the marathon (ap9zf1uf.gk, h+f wmvj4proximately 42.0 km) in 2 hours and 57 min. What is the averjkf1fw9.fvm + hzgu ,4age speed of the runner in m/s?

  A car travels 90 km/h. How long does it take for itx(95toe3ted yvyn uff:5xs69 s;wu q2 to travel 400 km?

  A ly (light year) is the distan8.uono9-a-w me m b+/d5jkq 6av :xiwece that light travels in one year. The speed of l+5 b/:oaqe mai- vje89wum-x kw od.n6ight 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 alonau4hu,1vswauj)2hb. xg;dm .h /1h w bg a straight road and you look to the side for 4.0 s, how far do yo,wmua hdwu s.hb2gb;u1 hhj14. )v/axu travel during this inattentive period?

  If you run a complete loop around an outdoor tnu0.n1u z5kxprack (400 m), in 100 s, your averagn01n.uup 5z xke velocity is

  A polar bear starts at the Nor : *(0ekqjuyplth 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 45 min. What was the bear's average speedlyeq(:j 0*puk ?

  A polar bear starts at the Nort,d,4e; k2ihbm ehpje7oy hy*2h Pole. It travels 1.0 km south, then 1.0 km east, then 1.0 km nmo*h e,,h d 2bj4p2ehyik; ey7orth, then 1.0 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 weekend from scho3 4;e8vuqhi bndu,v4 tol 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 15 minutes. How far is 4veb8iq ud;,u4tv3 hnyour hometown from school?

  A motorist travels 160 km at 80 kmvt/7 ape,/q0nx5mdy.)nkfeq 0arh ) n/h and 160 km at 100 km/h. What is the average )k,v5nma.y7e he 0tp) 0xaqnq/nrd/fspeed of the motorist for this trip?

  A motorist travels for 3.0 h at 80 km/h and 2ghx: e-p61g kd.0 h at 100 km/h. What is her average speed for the trip x1hp6d: gke-g?

  An airplane travels at 300 mi/h south for 2.00 h and then at 250 mi/h a it7wx e cbj,u8t.m;e 3j))kinorth for 750 miles. What is the average speed fb;ae).j ekitx cu37im 8w, t)jor the trip?

  In a 400-m relay race the ag 0yd 1tj6(.tli(dnik nchorman (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 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 0l y di(j6tn di1.ktg(runner not lose the race?

  A car decelerates uniformly and comes to a stop after 11 s. gf 5ec)u28);b qqxqlw The car's average veloeq5g2x8cu) fq;)qw bl city during deceleration was 35 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 t2 fr2zco7 ,n2y9qsz cdn, 5nsohe average rate of 22y2f,sdorn 9,nqsz5cconz 7$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h accelerates at the rate g 6)c4 y.j1hpgaugf- hof $2.0 \; m/s^2$. How much time is required for the car to reach a speed of 90 km/h?

  A cart starts from rest and accez*wkvvtnr0,i 2usk ;3lerates 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 w p;a2w)odr,yoith a constant accelerationpr;)w,2aoydo 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 5.1 m/s experiences e3m *. pbq01ebopf-mb.3yo dfa constant acceleration ofbp. o.3p*bemfd1 eq3f ym-0bo $3.2 \; m/s^2$. What is the cart's displacement during the first 8.9 s of its motion?

  A bullet moving horizontally to the rigv ,ity6;9jfmf ht (+x direction) with a speed of 292 m/s strikes a sandbag and penetrates a distance of 65.43 cm. i; 9vty,jf6m fWhat is the average acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is launchek,:p * syd) w 4*3gmultpvjad-d from a catapult on an aircraft carrier. It reaches a speed of 42 m/s at the end of v-dg up,a3 *t:* wmpdj4k)syl 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 m1u*l- kywd:n ioves 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 p-3cca2 qe(d--rmn brwn+wt ;to 80 m/s in a distance of 200 m. What is its average accelqbemr -2 (acwdtwc-;-3nn r+peration?

  An object starts from rest and un xf 62 qny(*bz4wuiugd i(xoaq 6:7*lbdergoes uniform acceleration. During the first second it travels 7.2 m. How *g:2qi 4ufyx6bw la67b( (dnoxuqzi* far will it travel during the third second?

  An object is moving in a sih qy:g;; uxr;traight line with constant acceleration. Initially it is traveling atqxu;y hig ;r;: 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 accelerate1ukwkz js/9g1 xgn1 a.: kjm6ls 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 tires on a dry road can /zx(8 cu*sa .caes7 hldecelerate 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 c52eu9 lf00gpg 8zc5)thqcfd y*0h pk zar that has been waiting at the intersection starts ahead with a constant ac9qd0)egf 2 z5c0 kpyzpthcl0hf u g58*celeration 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 the surface of plane-p4yvr;y ju16 dru w5wt X where the accelerationu5wpjw-v y4 ry 61dr;u due to gravity is $1.5 \; m/s^2$. What is the maximum height reached by the object?

  An object is thrown upward with an ,5g 8ro:qvavw ,f/ txd1td8y speed of 12 m/s on the surface of planet X where the acceleration due to gravfdy vg/t8w ,xvro tnq18a5d:,ity 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 (ec,d htvwl7r85k honc7m+7lof planet X where the acceleration due to gravity ik,d7thlr le mw8h(7vno cc+5 7s $2.5 \; m/s^2$. 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/s on the surfl+hx/(r v+0lftlwt*m pesf5 3ace of planet X where the acceleration due tor lsvme 0/+5*lxfl( ftpht3+ w 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 f,8s3lya40h m ownf:s3/qh ms e8xb:uruler between your fingers and releases it without w,ff ::/xmowha8 3m 0 ehsu8y3lnqs4b sarning, how far can you expect the ruler to fall before you catch it?

  A ball is thrown upward at a velocitye*ga)te cbycp ynv,1652 uj)g of 19.6 m/s. What is its velocity after 3.00 s?ep1e y 6v)au5,ycgb)* c nj2gt

  A bullet shot straight up returns to its starting point in 16 s. w+ cjs ;-9egvtWhat is the initial speed of theg+ je9stc-wv ; bullet?

  A ball is thrown straight( yp9f -znzof: up with a speed of 36.0 m/s. How long does it take to return to it-f9fzpnz:y o( s starting point?

  A ball is thrown downward from the top of a buildine 4 vyqws)x1(ig with an initial speed of 18 m/1vw(xs e)qiy 4s. It strikes the ground after 4.8 s. How high is the building?

  A ball is thrown straight up with a speed of 30 m/s. (or6fzytj95 a7r e /:b-jgzr vp6nly fill in numerical value j5rvtrg96 :bfzy z/r76ja- ep 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 air with a speed of 24.6 m/s.5y4 csw yb w66lg)n5vf (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 11 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 11.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what is the velocitwgb2 cymn +/u6y at t = 1.0 s?

  In Fig. below, what is the velociuvw .-l+ jeml0hv1f 7oty at t = 2.5 s?

  In Fig. below, what i r-.y33ap/ w+99eruxwi xcsz xs the velocity at t = 4.0 s?

  In Fig. below, what is the vehbb0( 5,dr 3.m;p ts5lgypjudlocity at t = 5.5 s?

  In Fig. below, what is the average velocity from 0n y 5fl0rvucogkd+71f)y +rw+ to 4.0 s?

  In Fig. below, what is the average vo0 1rv32v-1 m q1vtlrrwip) pfelocity from 0 to 6.0 s?

  In Fig. below, what y5 2i(7mtp oovl+f z+cis the acceleration at 1.0 s?

  In Fig. below, what is the acceleratt0x d8m va2a)mion at 3.0 s?

  In Fig. below, what is the average accelx6j u266rajbm /z 2cyh9vd gf*eration from 0 to 5.0 s?

  In Fig. below, what is the average acceleration from 0 ta:iiz. s f22g ic+kwj2o 8.0 s?

  In Fig. below, what is the displacement from 0 tnmzx *+i+a h,ajir3 ,co 8.0 s?

Does a car speedomet6tw1zp7gug (qs0h5bfer measure speed, velocity? {speed|velocity}

  An object can have a varying speed if its velocity is consp*pw*. 6r estduq0ed4tant.

  The velocity of an object can be negative when its acceleration is p62a;ido vq)6)k ammzm ho c9z3ositive.

  If one object has a greater speed than a second object, the first must have a 7-ngw at 1. 5q5/bh8k5t,m apseicinn greater accele7kc5tn m-1 igae5,n nw8aipb5ths/. qration.

  Two cars emerge side by side fromb*loi ytg 4/c6 a tunnel. Car A is 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 accelerat4llgk sm+/xicis *z (-ion decreases.

  A baseball player hits a foul ball straight up into the air. It l tjxcl0:jx9r271-hx bb- koiseaves the bat with a speed x o9j07h-xrj1 i t-2clbx: bksof $120 \; km/h$. 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 hapy7vl)kc ro ty1 /-kmrs(g,b j-pening to its acceleration, how does it changeo r v-cg, yys-kr7k/m)t1(b lj if air friction is ignored?

  As a freely falling object speeds up, what is happening to its acceleratiom6brui5ex1p.jj q7 0 sn, how does iimp0sqe 1b75 jjr 6xu.t change if air friction CAN NOT be ignored?

  An object that is thrown vertically upward will return to its origk ,;7mlu.lz.a0 cqfl oinal position with the same speed as it had initially if air resistance is negligible. Ik.7 ,fq ;lluzma0o. lcf air resistance is appreciable, how will this result be altered?

  An object can have zero velocilab22egzf9 )j zk78inty and nonzero acceleration at the same time.

  An object can have nonzero ve)hwxli; oyejc t.b 4,r.drp2n q1l/t*iz9+qh locity and zero acceleration at the same time.

  An elevator moving from the second floor to the fifth floor making no stops qo;zxey:nb 9( along the way hasye:n(;zoqxb 9 zero acceleration all the time.

  A rolling ball moves frwn9;5a 00sja pesl/j com $x_1=2.1 \mathrm{~cm}$ to $x_2=-4.2 \mathrm{~cm}$ during the time from $t_1=1.3 \mathrm{~s}$ 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 $t_1=-2.7 \mathrm{~s}$ is at $x_1=3.2 \mathrm{~cm}$ and at $t_2=4.5 \mathrm{~s}$ is at $x_2=8.5 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete laps around a jjx;n7 q m0h;q-.c6wrxy7tvyquarter-mile ($1 \; mile = 1609 \; m$) track in a total time of 11.0 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, ac q3:zk u* :cph14e +e2xo5 hkqsyj*bmoving 113 m away in 9.9 s. It then turns abruptly and gallops halfway back in 4.8 s. Calcu:s4 5euq:ezj*+h 1 2qak okhbp*cc x3ylate (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+xeqv qesgl8;9myq7 r x45e+pyr8hy/ $11 \; m/s$ to $23 \; m/s$ 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 4 mf:v6yh8-jy6bqg/ effk7sy $18 \; m/s$ to rest in a distance of 57 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reach a speed of 9 yk9 s3mv./9i kkjqxp$29 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $2.8 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinter qt*l.gms */g xcan burst out of the blocks to essentially top speed about. mxqg/*g tsl* $10.2 \; m/s$ in the first 12.5 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(thevplf,yp i-+; )ivw w.f z, from a speed of $20 \; m/s$ to rest in 5.50 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 o lg,bhyyg9rcrz5. oc675* fg,z3 fraun the highway. Assuming a deceleratio.fg,g,o yr79cu6z*gzr3 c5h5 a bl fyrn of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck going 6s7; h p5o f xi.tux 1e3xvxo68uxdv8g$25 \; m/s$ 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. Afte-3 p0 x63utc(wfojzhur exactly 27.0 min, there are still 1100 m to gox-(wou0f thpzjc6 3 3u. The runner must then accelerate at $0.20 \; m/s^2$ for how many seconds in order to achieve the desired time?    $s$