Suppose that an object travels from one point in space to another. Mar , 2 ctlsfgmca(p)/s*o)p g8gke a comparison between the displacement and the dlmr*)gta/2gpfcgo (8, cpss )istance traveled.

  When is the average vel;hqkq34,dl w yocity of an object equal to the instantaneous velocity?

  A new car manufacturer advertises that their car can go "from zero to sixty i475e7 gwo uuxyn 8 s". This is a description uoyg we4 7ux57of

  An object moving in the +x axis experiences a4bec,:d xn ns 6tn0lhlzhyf0 ex*7c ,:n acceleration of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to the xgytp3 ,r+b6 qEast (+x direction) begins to slow down as it approaches a traffipybq x, tr6+g3c light. Make a statement concerning its acceleration.

  Suppose that a car traveling to the West (-x direction) begins to slow down rw8b0p7u;udw7 t4h ys as it approaches a traffic light. Make a statement concerning7 bs ; uptr80wy47uhdw its acceleration.

  Suppose that an object is movinggdq7j2a d z ;38ln:cycc/ h(s8-iemvt with a constant velocity. Make a statement concerning its acceleration: cyvmiz -h3/cds7a;gqej8(82c ndl t.

  If the velocity of an object is zero, does it mean tf h-s.qu0pazc lo-,;,zmq 9k nhat the acceleration is zero? Supplzum9c,-n0, qp; o-.sqfhk azort your answer with an example.

  Can an object's velocittv-,rtln2 rki+qe n8.)t1u t :a5hqj yy change direction when its acceleration is constant? Support your answer with an v8rt:t qn2n-1,5+.ejhk iu qtr)yta l example.

  Suppose that an object is moving wifuk+ v/* j o(:bhzt9qfth constant acceleration. Make a statement concerning its motion with respect bq/tf f zv:9k+uojh(* to time.

  Can an object have increasing speed while its acceleration isv8e(6wpa pry) decreasing? Support your answer with an re 8ypp( wa)6vexample.

  Suppose a can, after an initiaem ;+ zle lso+)kf,vb 4lc71qhl kick, moves up along a smooth hill of ice. Makel4 ;7ze lv)sm1+ c+hqkbfe,lo a statement concerning its acceleration.

  Under what condition is average velocity equal to thc jq54s*w 2wt lpa 4v*ob(s.jwe average of the object's initial and final velocity 2 sj 4*(*wa5v.4wbjo plctqws?

  Objects A and B both start at rest. They both acceleratlqn9rl4bd1)(gbig, s o/do2 a e at the same rate. However, oig4 l no9b1ql,rgdosdb2(a) /bject 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 from rest. They bothfc;t a1cuh;8m40n mue accelerate at the same rate. However, m 0a4tfecn;; 18mhuuc object A accelerates for twice the time as object B. What is the distance traveled by object A compared to that of object B?

  When an object is released froj* u1 x8ig ;p,k cy/escix9h:zm rest and falls in the absence of friction, which of the following is ,8kgu9z 1/ js ph;ce*x:yxcii true concerning its motion?

  When an object is red6jg+e xs) lq u*6,,kja-reoaleased from rest and falls in the absence of friction, which of the following is true concles*j-qu, radg6 +o)6,j xae kerning its motion?

  Suppose a ball is thrown straight up. Makh;t ,fcr48 *jpuqw* tue a statement about the velocity and the j*wtt*cqh84 , r;uufp acceleration when the ball reaches the highest point.

  Suppose a ball is thrown straight up. What is its accelq mae-.n)l4 +bks wm.geration just before it reaches its highest pointslwg4bmqn ) .k+.ma-e ?

  Suppose a ball is thrown straight up, reaches a maximum height, then falls to ft4lha,g )7 vvits initial height. Make a statement about the direction of the velocity and acceleration as the ball is goivl,4v7hga f)t ng up.

  A ball is thrown straight up, reaches a maximum height, then falls to its 5(nzr mur3xq. initial height. Make a statement about the direction of the velocity and accxu5( q3rzmr. neleration as the ball is coming down.

  Suppose a ball is thrown downwa f9pkhak k(/we )q1p,yrd in the absence of air resistance. Make a statement concerning its accele,fwy pkp/1q 9 (hakke)ration.

  Suppose a skydiver jumps from a high-flying ph tlnwp35.1edlane. What is her acceleration when she she r3d. pn1ehw l5teaches terminal velocity?

  A ball is thrown vertically upward wit v )k(eq*otmo2h 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 tha*ve) tmokqo (2n the first ball?)

  Ball A is dropped from the top of a building. One second later, ball B is droppn.c 88(kpii;;crg1l grk yz4wed from n;yil8w;gi .kr1(gr 8 cz ckp4the same building. As time progresses, the distance between them

  Ball A is dropped from the top of a building. One second8oe 8n;xi)vbv /t9 xlv later, ball B is dropped from the same building. As time progresse/ivnl9e;8b)xv 8t xvos, the difference in their speeds

  Two objects are thrown from the top of a tall building. One is thrown upmh*qw9 mnzcgc2f6k:*op r 2v0, and the other is thrown dowphc6w:mo*0fq2kc r9m2v*n z gn, both with the same initial speed. What are their speeds when they hit the street?

  A brick is dropped from the top of a building. A second :4c8afp dxwz3 6 u.0 qokmqgd-brick is thrown straight down from the same building. They are released at the same time. Neglect a8p.3dxc-zm4 fqwo: 0 dq 6kaguir resistance. Compare the accelerations of the two bricks.

  An object is moving withi90m e31dzof c constant non-zero velocity in the +x axis. The position versus time gro z9ic10e3fdm aph of this object is

  An object is moving with constant non-zero acceleration i/3a f/ml+o pn4flq,w in the +x axis. The position versuf3wf,/ ln/am+liq4p os time graph of this object is

  An object is moving with constant non-zero velocity in thekif;b; ree p/(8n x/oh +x axis. The velocity versus time graph of thish ni;/;(o xe b/k8erpf object is

  An object is moving with constant non-zero acha t-ke;yaewr3 k5j ( 5kn)zn2celeration in the +x axis. The velocity versus time graph of thie ( 55n;kwy-ea t3arkhzn2) jks object is

  The slope of a position vcqk/qtvz+y ucw29a7) c 05/aux o8vpo ersus time graph gives

  The slope of a velociqxiqx(-h/6nj0hmo 3 oty versus time graph gives

  The area under a curve in acv uml fw(c.566u ;cu rdk,yrzeis+12n acceleration versus time graph gives

  The area under a curve in a velocity versus time gr0cdhp l e:w7r7aph gives

  If the position versus time graph o ucot (ki,l18(6a/ikivgp :oof an object is a horizontal line, the object isouik8 :opag (k(6li/cvi1t, o

  If the position versus time graph of an objecn a ;4*j+9hb fvqy0rnzt is a vertical line, the object isrf9nq *yj nv az;b+0h4

  If the velocity versus time graph of an object ragkjs sdpwny7.2y-bhj/ /00 is a horizontal line, the object ij.0y-rs gkw0hjnyp/b2as / d7s

  If the velocity versus time g uqhc0 y;0js*n;iah )xraph of an object is a straight line making an angle of 30 degrees with the time ax; 0 yscx*u;)jqi hhan0is, the object is

  An object moves 15.0 m north and then 11.0f3owz-lm wjdq + .+r av15okn. m south. Find both the distance traveled and the magnitude of the displacement vect v5wd+.qo+- l1kowm nfz3j .aror.

  A boat can move at 30 g(0hmj:di ywa0l7q(x6mn9nu km/h in still water. How long will it take to move 12 km upst6y0u7ljn09g:mxwdnha m( i( q ream in a river flowing 6.0 km/h?

  55 mi/h is how many m/s? (1 mivmwkx-d8jddu 0k 233ev x ewezp(7 ,*x = 1609 m)

  What must be your average speed in order m) :9 d,lo ):qr5. d0uwmb xow8icfedxto travel 350 km in 5.15 h?

  A runner ran the marathon (approximately 42.0 km) in 2 hours a1gp*xu(k. v:ndq7 ve)d qg2u ind 57 min. What is the average speed of the runner ixg(i:np1.2 * k dq7vduevq)gu n m/s?

  A car travels 90 km/h. How long does it take for ity0)c qqwsn8g)ye j63m - 3ysax to travel 400 km?

  A ly (light year) is the distance that light travels invva,,8zdfww;+yq wbo y753v o one year. The speed of ligw y,ww,dv oy;v+ oba7f583qzvht 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 t //wqdyfc,cub hf; 8u9k 9gj7road and you look to the side for 4.0 s, how far do you travel during tjcqc /;bw8guf97 ,/kthdu 9 fyhis inattentive period?

  If you run a complete loop around an outdoor trv2a (d5f/hapu ack (400 m), in 100 s, your average velocity(d2av fpuh/5a is

  A polar bear starts at the North Pole. It travels 1.0 8v zonga blt8*9my:t3 km south, then 1.0 km east,m: ltvzo9g 8aty 83bn* 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 speed?

  A polar bear starts at the North Pole. It travels 1.0 km s bdd ;w7;y.ydszg zc+-ak*z- youth, 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 vey*z -gd+;ykw7c.y;sz-azbdd locity?

  You are driving homeh/* (z8fxdzsu.py*:gvt hck- on a weekend from school at 55 mi/h for 110 miles. It then :sv -u d8xgf*tpcyz k/*.(hhzstarts to snow and you slow 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 km at 80 km/h and 160 km at 100 km/h. What is thed -ucyb g9 j9-m5.t nvuwk8bf7 average spe.8b99k-57 yd fn -uwcubtvmgj ed of the motorist for this trip?

  A motorist travels for 3.0 h at 80 km/h and 2.0 h4h5q5gwt xh5 9 fytfq+ at 100 km/h. What is her average 5 yhg45fx+q qtht5 9wfspeed for the trip?

  An airplane travels at 300 mi/h south for 2ezt+nu 6 q4(r ipy4w s:8svpjhv3*5k r.00 h and then at 250 mi/h north for 750 miles. What is the average speed for the triw(+vtvn*yh4zs erq65 pp i rkj8u: 4s3p?

  In a 400-m relay race the anchorman lz/wz9,pquv9q(f/l,s mkt i5 (the person who runs the last 100 m) for teamit(lfzmzv5 k,p 9/u,qq9ls /w 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?

  A car decelerates uniformly and comes to a stop after 11 swup wr*l xhzil4k+:68 . The car's average velocity during deceleration was 59 km/h. What was :i68u4+hl kwrw x pz*lthe car's deceleration while slowing down?

  An airplane increases its speed from 100 m/s to 160 m/s, at the avi .fr nr(v811tepn+ nnerage rate of 8ne f 1t+1.n rnin(prv$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h accelerates at the rate of*j6/ar uofn )j $2.0 \; m/s^2$. How much time is required for the car to reach a speed of 90 km/h?

  A cart starts from rest and accelerates at1 solyti hsbkxw z89-.id .q ;k6o*/trs;jma( $4.0 \; m/s^2$ 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 +z1kqpfea *:j40umu;m5gnj g up with a constant acceleration of 0f1 5qaku4;nmgue:j *zm+pjg $2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial velocity of 5.8 m/s exp5etr ikxq/9 ;veriences a constant acceleration ox/ r5tk; 9eivqf $2.8 \; m/s^2$. What is the cart's displacement during the first 8.7 s of its motion?

  A bullet moving horizontally to the right (+x directionxn 6 .4o ltjan6rh(w9a) with a speed of 329 m/s str(jalr6awx6nn4. o9htikes a sandbag and penetrates a distance of 95.76 cm. What is the average acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is launched fromr.zha skd:qj88uf .lg: m2c5u a catapult 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 cons::c8.8 hm5 ukqz .d2ljgsfaur tant, what is the length of the catapult?

  A car starting from rest moves with conxxn)aj8,7 k+ k;-y gtzhqw y-istant 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/sdv vrem0l7.;h in a distance of 200 m. What is its average accelrlvev.m 0h;d7eration?

  An object starts from rest and undergoesp sh5)5q8 cewzev56:c 7oyd ws uniform acceleration. During the first second it travels 7.4 m. How f5svpoey qwc):c 57 zd 85sew6har will it travel during the third second?

  An object is moving in a straight line with cond6ts,uq;f3a 47mc5rbd 0bqg 6 pdds/vstant acceleration. Initially it is traveling at 16 m/s. Three seconds later it is traveling at 10 m/u7d/bd,a c d66 0vq54dt gr3mfs; pqsbs. How far does it move during this time?

  A car starts from rest and accelerateyavxg ,h5di:9s 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 decelerate at hdez8;86rb hmabout $5.0 \; m/s^2$ 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 thatsji1o 1 lne9f,0vi( rmcyt3pn2 q:5 my has been waiting at the intersection starts ahlo teifpvrimm 1nj : c,s (1n3y09yq52ead 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 onllyh38 of /w;a the surface of planet X wher ;83ylo wfl/ahe the acceleration due 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 e b+6e q/cp,c+t3bt mfb2i*dz the surface of planet X whebcdz pqt,*i b2tf36e+cb /e m+re the 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 upwar ) a(eo t6p*7ga4uub/r k f.an2yiozo)d with a speed of 15 m/s on the surface of planet X where the acceleration du /6r2ao )a a7u(zbi*.ne4tuy)pf ogoke 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/s on the surface aigdxd8)7vb l0/ xq-b of planet X where the l 8b/vxqd-i)xda gb07acceleration 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 gre /2cn r0me *t*sf6czlcater than 0.10 s. If your friend holds a ruler between your fingers and releases itrt6 cl2c/*emfn* cs0 z without warning, 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. What is itz/lpfsczm7s+yh5 - . ps velocity after 3.0sc+. phsz7z/mlf-5 py0 s?

  A bullet shot straight up returns to is2- zw3a e 5h:he wpk:be0ics2ts starting point in 7 s. What is the initi2h2icz ks 5 swa-b :0e3wpe:heal speed of the bullet?

  A ball is thrown straight up with a speed og +v +i3nsraai 1uf645:sc-agr w8 acpf 36.0 m/s. How long does it take to1a u-as8agnr +c a+pwsg rif:ci5v463 return to its starting point?

  A ball is thrown downward from the top of noe2 v,ls04d da building with an initial speed of 17 m/s. It strikes the ground after 2sd0e,4o v nld4.8 s. How high is the building?

  A ball is thrown straight up with a i97 0 ki9enmsrspeed of 30 m/s. (only fill in numerical valuei99i0kesrn m7 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 7zx9.9omub c cwith a speed of 33.0 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 2 seconds later.  (数值)  $m/s$
(e.) Determine the time at which the ball pass a point 14 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 14.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what is the velocity at t = 1.0 swmf s3gfv w;.jp7(j8v o:kit+?

  In Fig. below, what is the velocity at lc -ek0rvr 3spk+k+l m/dfc:(t = 2.5 s?

  In Fig. below, what is the velocity at t = 4.0 f/agz :/vs ub0s?

  In Fig. below, what is thxw ac .oel2bxm/g8) ,ie velocity at t = 5.5 s?

  In Fig. below, what is the average velocity from 0 to np(2-lfwemo:k 928vb sxyz w )4.0 s?

  In Fig. below, what is the average velocity fr,ts dl jpdd,i700rux1om 0 to 6.0 s?

  In Fig. below, what 6:kx9uxf/x0myh 5tr.sr7l uy y:n* kcis the acceleration at 1.0 s?

  In Fig. below, what is the acceleration7e wzgsew+hx:by s4k:a;;f1h at 3.0 s?

  In Fig. below, what isf5sit 7w (h.nc the average acceleration from 0 to 5.0 s?

  In Fig. below, what : z)4 w osy5nxxuvm6:dis the average acceleration from 0 to 8.0 s?

  In Fig. below, what is the displacement from 0 te.od fxd m5(ologq wtq0 :i.)4o 8.0 s?

Does a car speedometer measure lcawtqnx2s,)6th8cwf c .j2.speed, velocity? {speed|velocity}

  An object can have a var+tn4 jtxzo ;3jying speed if its velocity is constant.

  The velocity of an obju z8-)s cguj)jhf1 rz6 g9gn;tj6xpj 7ect can be negative when its acceleration is positive.

  If one object has a greater speed than a second object, the fi4521 wdk w39jewi hzfprst must have a greater acceleratiik34e9 ww1wp2f dj5zhon.

  Two cars emerge side by side from a tunnel. Car eyn-z z(79qpp 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 acceleration decreases.wy12/ d/n p zxz)dvbs 6kd1y(s

  A baseball player hits a foul ball straight up into the air. It leavra a h.,//)oxcak d8zzes the bat with a spe rxo 8zck/hdaa)z./a,ed 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 smxid8x*v. c-o peeds up, what is happening to its acceleration, how does it change if i8c m*d-v.xxoair friction is ignored?

  As a freely falling object speeds up,z-(qua/axl apfm05x) what is happening to its acceleration, how does it change if air friction CAN NOT b amxf-5xq0)lapaz (u/e ignored?

  An object that is thrown vertically upward will retwz+) 1 ofhd0ayurn to its original position with the same speed as it had initially if air az+yhdf)0 o1wresistance is negligible. If air resistance is appreciable, how will this result be altered?

  An object can have zero velocity a yac )5abzjgcqmpg6r w8g.djc5( g8be)7g,d; nd nonzero acceleration at the same time.

  An object can have nonzero velocity ank(u prubaisyj ub1;no,;c .:, d zero acceleration at the same time.

  An elevator moving from the second floor to the fifth floor m4w+;mwehp nxch (p) cq;0qgg-aking no stops along the way has zero acceleration all- (4q;0g)qpn xwm ;ge wccphh+ the time.

  A rolling ball moves fme/yp 06 zu5xiz9x -mpv)ud x5rom $x_1=2.8 \mathrm{~cm}$ to $x_2=-5.7 \mathrm{~cm}$ during the time from $t_1=2.2 \mathrm{~s}$ to $t_2=5.4 \mathrm{~s}$. What is its average velocity?  (数值)  $cm/s$ (only fill in numerical value please)

  A particle at $t_1=-4.5 \mathrm{~s}$ is at $x_1=2.9 \mathrm{~cm}$ and at $t_2=3.5 \mathrm{~s}$ is at $x_2=7.8 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete laps around rz(n +toe rm,7a quarter-mile ($1 \; mile = 1609 \; m$) track in a total time of 8.6 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, moving 113 m awa4.z )m8pw;v gonp2 .ajgan7eoy in 11.5 s. It then turns abruptly and gallops h)7.g n4omaeoj2z8p.nagpw; valfway back in 4.8 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 from3y mb8njrsi7wyi3q q .7n3d2 y $13 \; m/s$ to $23 \; m/s$ in 5.5 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 frokgx2(1 bmlh;b4lqea1m $21 \; m/s$ to rest in a distance of 80 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reach a speed oy lw,s.e 5fz5w1os8dgf $29 \; m/s$ 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 b u;;2r89v :csoe kd*bktngszce5x 7.ourst out of the blocks to essentially top speed abou*gx25etkzs :;drsc vo8oe unb.9;ck7t $11.2 \; m/s$ in the first 14.3 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 uniformxct gi:7 7 mz/k64h;d,hrrps xly from a speed of $20 \; m/s$ to rest in 4.49 s. How far did it travel in that time?  (数值)  $m$

  In coming to a stop, a car leaves skid marks v gpfnpthq ovo1e+u8:,6+amlvlycsl/6 2-.n 92 m long on the highway. Assuming a deceleration l1n/q,2nlg+ouvm8v6t p 6.s yl-hfov e+:apcof $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a true bs ah0n5v2 ik iwt5utkfom3h;;/) o*ck going $25 \; m/s$ 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. Aftew;7jg (blan 6cyjlk56 r exactly 27.0 min, there are still 1100 m to wb ;k6 aj6l(lg75j cnygo. The runner must then accelerate at $0.20 \; m/s^2$ for how many seconds in order to achieve the desired time?    $s$