Suppose that an object travels from one point in space to another. Make a com 9ci/o5lmjnu2 4knhp1xkh p7 7parison between the displacement 9h2mnop7p5knxu 4 l k1 jic/h7and the distance traveled.

  When is the average velocity of a*c,tz0qayx h n 6w;.bsn object equal to the instantaneous velocity?

  A new car manufacturer advertises that their c 7p:n2ysxclc(ar can go "from zero to sixty in 8p 7(:clxsyn c2 s". This is a description of

  An object moving in the +x9m cb.ez0u uoz;9plr d2 /zlp0 axis experiences an acceleration of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to the c ns)txmd e28,East (+x direction) begins to slow down as it approaches a traffic light. Make a statement conceren)2tc ,8d xmsning its acceleration.

  Suppose that a car traveling to the West ce kwoeo-3 mty ..e(hyjlw,1/(-x direction) begins to slow down as it approaches a traffic light. Make a statement concerning its accelera -.lwy h3,t.mk / o1ye(eocejwtion.

  Suppose that an object is moving with a constanvm.pz( ipo tclv1 4g44t velocity. Make a statement concerp.v4go 44z1cv m(t plining its acceleration.

  If the velocity of an object is zero, does it mean that the accelera n,j huzeo4c6kb1+a4a* ;olx ttion is zero? Support your answer with an o1n+c4au zhe*l6j xo4bk t,a ;example.

  Can an object's velocity chan4 6vpynf5 rk3ege direction when its acceleration is constant? Support your answer wpe4k3 y r5nf6vith an example.

  Suppose that an object is moving with constant qqqyu(:e/f p44v/vfvg2gg . hacceleration. Make a statement concerning its motion with respect to eqfg gyh4g/vv.42( qf :/pqvutime.

  Can an object have increasing speed while its acceleration is decreas0tim pf0*7l6nvgtg z (tb)ix7ing? Support (intg0tv b*7xfgi6)p7t lzm0 your answer with an example.

  Suppose a can, after an initial kick, moves up along a smovuhta0rot.an33yq +t 5c0 (adoth hill of ice. Make a statement concerning its accelerat.ud+o 0t3an vt035cartqay (hion.

  Under what condition is average velojvbbv;l9 ;0,lmv :qvccity equal to the average of the object's initial and final velocil 0:v bcvmvj9vq ;b,l;ty?

  Objects A and B both start at res8onz laq14(f vt. They both accelerate at the same rate. However, object A accelerates for twice the time as object B. What is the final speed onol 1v 84a(qfzf object A compared to that of object B?

  Objects A and B both start from rest. They both accxjxd8b cr3.- eelerate at the same rate. However, object A accelerates for twice the time as object B. What is the distance traveled by object A compared jb x-3rx8e d.cto that of object B?

  When an object is released from rest and falvt1 j6hyvj/czf+6 c h0m jze;/ls in the absence of friction, which of the follv6h/m +6;vc z jejfj1z0t/ychowing is true concerning its motion?

  When an object is released from kq t;71j mw nblr4r3;sdw1 6rwrest and falls in the absence of friction, which of the wmbw1r4 jw;d3t71rkqnl6 s;rfollowing is true concerning its motion?

  Suppose a ball is thrown straight up. Mak)tx*v )93fg7gypqk lge a statement about the velocity and the acceleration when the ball reaches the highest)g9 xl7* pytgqkv)g 3f point.

  Suppose a ball is thrown straight up. Whaxc2jwf c f+./ct is its acceleration just before it re. c2jf fwc/+cxaches its highest point?

  Suppose a ball is thrown straight up, re6 hu3ck7gl n;3,bmd ijs.hzz- aches a maximum height, then falls to its initial height. Make a statement about the direcj3bzk7n6h cu;l.,-3 h szmgid tion of the velocity and acceleration as the ball is going up.

  A ball is thrown straight up, reaches a maximum height, then/ rzy*sfj 4(rl falls to its initial height. Make a statement about the direction of tj(f/*r z rsyl4he velocity and acceleration as the ball is coming down.

  Suppose a ball is thrown downward in the absence of air resistak zxu)d:co85y:(he tu7e 3ewo nce. Make a statement concerning its acceler (u e)8t5hyw3kxu:o7z oc: edeation.

  Suppose a skydiver jumps fbf-mir+ 9dr4nz fshxx4/8 .*xnr f dy9rom a high-flying plane. What is her acceleration when she she reachedr/n4-r4 xf 9mx+ sff8z 9brx* dyi.hns terminal velocity?

  A ball is thrown vertically upward with a speed v. An identical second bdv-rfw0 /hs7+su y6ytall 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 th dvs -06 /yyrfh7stwu+e first ball? (How many times higher does the second ball go than the first ball?)

  Ball A is dropped from the top of a buildingu)n2. r.6tq sg)ogjzg . One second later, ball B is dropped from the same building. As time progresses, the distu)r )qo2.j g.s6ggtznance between them

  Ball A is dropped from the top of 5e ybaa k9e;t.+e: j lnfdzs12a building. One second later, ball B is droppe+az eltseadn; 9y5k j21:.f ebd from the same building. As time progresses, the difference in their speeds

  Two objects are thrown from the top oviob 7i..a gaham..o4f a tall building. One is thrown up, and the other is thrown g a .o4ihb ao...m7iavdown, both with the same initial speed. What are their speeds when they hit the street?

  A brick is dropped from the t 5j3ipwvsduu4-/ b xkn8cbf;6 op of a building. A second brick is thrown straight down from the same building.d 6p u fvnj3b-wcb4;i5xu/ks8 They are released at the same time. Neglect air resistance. Compare the accelerations of the two bricks.

  An object is moving with constant non-zero y oh+-(9 vv,1cjn;zwvu zjmp-velocity in the +x axis. The position versus time graph of this object oc-vyv( nm ,pj +hz-v uzw1j;9is

  An object is moving with conb afvs/mh,z t7y,wi/n1.ay +v zx2iz 7stant non-zero acceleration in the +x axis. The position versus time graph of this object isi12/nw/ 7zmb yz+ta.,yfvz ,v ha7xis

  An object is moving with constant non-zero velocity in the:/i w09pa/yzruxri 0m +x axis. The velocity versu0wxpi/u0z9ri/mary :s time graph of this object is

  An object is moving with constant non-zero acceleration .* d fvqtt1y( vn)r2-.encexmin the +x axis. The velocity versus time graph of this ob-qm*ttcev.d)v1(nn re.fx2 yject is

  The slope of a position versus time graph gi* a.clve g:wa+ves

  The slope of a velocity ver--nu pssrso -u93npm /sus time graph gives

  The area under a curve ir/ajvf4 oryqoy4h.l :sy:q :7n an acceleration versus time graph gives

  The area under a curve in a velocity versus time8pa s3zvlg2x*.j: 5zu2 pupcd graph gives

  If the position versus tw1i 9i+v.v:xfbnva 6 hime graph of an object is a horizontal line, the object a 9vxn.if 61:vv wb+hiis

  If the position versus time graph ofxl) 5p+x6ctd v an object is a vertical line, the object is)+ x cvtp6xd5l

  If the velocity versus tik( ix4kuh. zsbc*/ cj-me graph of an object is a horizontal line, the object cxs4k( -*i.h ucbkz j/is

  If the velocity versus time graph of an object is a straight qy s4*w:h4l;d,n dyqvline making an angle of 30 degreesq*yl,n:v4s hydd4wq; with the time axis, the object is

  An object moves 15.0 m north and then 11.0 m south. Find )7fug zwu/t9q8bw r6m both the distance traveled and the u/b qt8w 96zugw7f)rm magnitude of the displacement vector.

  A boat can move at 30 km/h in still: l5yngaj;)cg*lxo) 7uhxva . water. How long will it take to move 12 km upstream xjx o:7g .)g;h ) ul*avayc5lnin a river flowing 6.0 km/h?

  55 mi/h is how many m/s?d3uejr:x 79ctj l c j6m6;qy0d (1 mi = 1609 m)

  What must be your average speed in order to travel 350 km in 5.156f fer:vac u,4 ljmw c3oa*1 k0hl+tf6 h?

  A runner ran the marathon (approximl3)czj3g +4s0y3qqr(tje( co a 1 pqkwately 42.0 km) in 2 hours and 57 min. What is the a3)qyq jr ogt4lcsepqk33j+0 (1czwa (verage speed of the runner in m/s?

  A car travels 90 km/h. How long does it take for it to travel 40cf6f/tmwx:f5r 8zig. 0 km?

  A ly (light year) is the distance that light travels in one year. The i9rno 88dj4g5r xw;o7rb5aobspeed of lig548r ;5 aobj7rwxd9bn rgoio8 ht 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 road and you look to the side fortkmwyx5( 9s-b 4.0 s, how far do you travel during this inattentive pert9w(ksmx y5-b iod?

  If you run a complete loop around an ouq8h1n) fic.qm c9un0 l.ta3jptdoor track (400 m), in 100 s, your average qfc .u.38p1j0ncnam 9itl )qh velocity is

  A polar bear starts at the North Pole. It travel*1qfcv 7 ,d)n2vqt 4qcbd np7es 1.0 km south, then 1.0 km east, then 1.0 km north, then 1.0 km west to returnf 7q2v7cq ),tbdqecnv4d *n1p 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 t p1w+0;mjfoqkm south, then 1.0 km east, then 1.0 km north, j1 fto;p qmw0+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 school a/etrufb:w f)zz:03 af t 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:0f affb rt3wz:z)e/u 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 tetl3imd*y see13 :vi8he average8ieyl3it*e : d mv3s1e speed of the motorist for this trip?

  A motorist travels for 3.0 h at hij +8 hb+l:lb80 km/h and 2.0 h at 100 km/h. What is her average speed for the tr+i:hh lbbl +8jip?

  An airplane travels at 300 mi/h south for 2.00 h and then at 250 mi/a) jt8 4 ou3mvpoej53xb k-r,lh north for 750 miles. What is the avero3ambrp,xt3k eo58-) vl 4juj age speed for the trip?

  In a 400-m relay race the ancd ))atqpv69nfau+sj8z8iu ; ahorman (the person who runs the last 100 m) for team A can run 100 m in 9.8 s. Hisvz9a8iun +q j d)saf6;tap8)u 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 comesgzc70s cdy gzu2c , os)4wo402/id qsd to a stop after 11 s. The car's average velocity during deceleration was 30 km/h. What was th0w,o 4iosdu /cyzg4c )7s dq2gc0d2sze car's deceleration while slowing down?

  An airplane increases its speed from 100 m/s to 160 m/s, at the akiac2 fjwb h ,ri( (;- qs2ofdbg)qi32verage rate of fgb ,s)ikf(qab;2 -iw2 h23id jro(cq$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h accelerates at the rate ofuvyno8u;t rhj- ,p;h7 $2.0 \; m/s^2$. How much time is required for the car to reach a speed of 90 km/h?

  A cart starts from rest and a;q0 yel 2ndwy0ccelerates 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 acceleb l,) q.,nnvh )rcnjrlq 7c0q4ration,c)cqn0njl)l4qrbh 7 n.v,rq 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 a constant acceleration oh0e(lf q2dz8t 9thkfst,yv8 + yb5 td2td dt 85hteqsyh9v+ff0 8kb22y(l t,zf $3.6 \; m/s^2$. What is the cart's displacement during the first 8.8 s of its motion?

  A bullet moving horizontally to the right ((v 5.lcx9notad,f yr4+x direction) with a speed of 399 m/s strikes a sandbag and 5xca. ro tvn(f,yd4l9 penetrates a distance of 19.99 cm. What is the average acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is launched from a catapult on an aircraft carrier. It rcf1f qev8/an) eaches a speed of 42 m/s at the end of the cev)cfq/n 81fa atapult, and this requires 2.0 s. Assuming the acceleration is constant, what is the length of the catapult?

  A car starting from rest moves with constant accelerl.zc 7m rgvt3,ation 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. Whatrwo dk0,ld 0(r is its average acceler0 0d dokr,w(lration?

  An object starts from rest and undergoes sahg6 b b5g g9(si/;nl u:ws0quniform acceleration. During the first second it travels 4.6 m. How far will it travel ds0 qgb9h:wsu s5g6;n/ibg la(uring the third second?

  An object is moving in a s9jo bp 8(b2vnj3(nisptraight line with constant acceleration. Initially it is traveling at 16 m/s. Thj osv 38p (jpn9nbb(i2ree seconds later it is traveling at 10 m/s. How far does it move during this time?

  A car starts from relomx4da18 x,05d vcmi0k7ddust and accelerates 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 abo/hkq/ 9 l*5g.me oauphut $5.0 \; m/s^2$ 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 waitin. 5 /f uh-p4*yqccb0yo qht3hig at the intersection starts ahead with a constant acceleration oi c*fb4htph 50 uqc-q.y /h3yof $2.00 \; m/s^2$. 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 spee,pq xlx/-uic ;s3 3cz32getiad of 12 m/s on the surface of planet X where the acceleration duxe,u- /c sctq pi3lixa;zg3 23e 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 p fqm k9n x)v/s9wl,0nwlanet X where the accelerati9 qwxv0)fs,lmn n9k/ won 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 -blp6 xpi tzrw2re( ::: enzd;7m g0if15 m/s on the surface of planet X where the accelerazzelr; i6:dxf(m 0gpri:ew2- n:p7 t btion 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/s on the s)g.ic4i r6gzp fzg ;b2urface of planet X where the acceleration due p giz;f4crg .26bizg) to gravity is $3.5 \; m/s^2$. What is the speed of the object after 8.0 s?

  Human reaction time is usually gref-x2l58vskn. *oi4xrt k8thtater than 0.10 s. If your friend holds a ruler between your fingers and releases it without warning, how8v *rxt5 k.stiohf4 ntlkx2-8 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 a9w p jihdh5z/f-,j 3hits velocity after 3.0,hih-z jw9a/5p j fhd30 s?

  A bullet shot straight up returns to its starting point in 10 s. What isck+l /;u;fjb0 ruahsb;-)7uff uj 0qn the initial7)rqkh;nc; fu0jub /+ja ;0-lf ufs bu speed of the bullet?

  A ball is thrown strxk8xxnxb 2;8bob 2c x1aight up with a speed of 36.0 m/s. How long does it take to return to its starti2xx8o nxxk 8xb21b bc;ng point?

  A ball is thrown downward from the top of a building with an inikg- :7b tqey; hmabd2+(e6+k6lpd du rtial speed of 23 m/s. It strikes the ground after 1.5 s. How high ipd;kk h+6t7ud( 6l2 y- +b gamd:eeqbrs the building?

  A ball is thrown straight up with a speed of 30 m/s. (only fill in numericalspds2lk-9s nwy;yabv w-m2/3 val-/ss22d p;93b-ywwa lnvky m sue 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 x 5fkk -ytbtljz9tb9)s a77a -the air with a speed of 23.9 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 9 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 9.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what ik735fnllm fw 7 ,eovq1s the velocity at t = 1.0 s?

  In Fig. below, what is the velo(-) fypdo+ lgp1(reuwcity at t = 2.5 s?

  In Fig. below, what is the velocity az4 db*)rxa)lpwgpj)kct i735 t t = 4.0 s?

  In Fig. below, what is the velocity at t = a kdy6 a4cz.)qzf:bv,5.5 s?

  In Fig. below, what is the average velox ddc*3yre *twd-(8l z or-do5city from 0 to 4.0 s?

  In Fig. below, what is 9r9w+buow / sfww;fmc: kylh; -rcidb*-hc+- the average velocity from 0 to 6.0 s?

  In Fig. below, what is the acceleration at 1.fm*ccjs*6t d:adlyvl z 695m ,0 s?

  In Fig. below, what is t im/8s y7v-26 ezwl64nz yqgv7ocjg3a he acceleration at 3.0 s?

  In Fig. below, what is the average accelx)l+ kpgbec 76dwa1fi6j ).o ueration from 0 to 5.0 s?

  In Fig. below, what is the average/b0eib(;7hpu hqx +wdk g9wt6 acceleration from 0 to 8.0 s?

  In Fig. below, what is the di+ rvu:*mcio:d splacement from 0 to 8.0 s?

Does a car speedometer measure speed, velocity? b,d3 y emt/ae({speed|velocity}

  An object can have a varying speed if its velocity yeid1uh 7-p 4v mbk7:s(bv1kyis constant.

  The velocity of an object can be negative when its acceler+ v-l) zyvlbgfan 7r/;ation is positive.

  If one object has a greater speed than a second objrx9g vc9/7b ef,vqle2ect, the first must have a greagv q,9lbf/cr9xv7 e 2eter acceleration.

  Two cars emerge side by side from a tunnel. Car A is traveling with a sp6kk oukb nt1ngc2d )5 r1umb6+eed 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 accfyby .* k13x cslx-h,aeleration decreases.

  A baseball player hits c;kal hu8j7b5 a foul ball straight up into the air. It leaves the bat with a speck78h; luab5jed 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 obbp+ k2* g8 atbi+gikl8ject speeds up, what is happening to its acceleration, how does it change if air8gb + +ka8p*li bk2tgi friction is ignored?

  As a freely falling object speeds up, what is happening to itf,hm p,em9v) *b y:hovs acceleration, how does it change if air 9hh*, e,movmy )bfv: pfriction CAN NOT be ignored?

  An object that is thrown vew9vu . uf2m:3w3vdb; 1)intphjiyyl3rtically upward will return to its original position with the same speeuw1:y;j)dbp mvhtl323yii.39 n vuwfd as it had initially if air resistance is negligible. If air resistance is appreciable, how will this result be altered?

  An object can have zero velocity and nonzero accel/* h0ahwc*v7cf i6bke eration at the same time.

  An object can have nonzero velocity and zerr +.d8dz 2xqvso acceleration at the same time.

  An elevator moving from the second flo*v5j iw e9lur2or to the fifth floor making no stops along the way has zero ajr2vl9ue*i w5cceleration all the time.

  A rolling ball moves froldyfqkore,u icn1j: m4n041 ( m $x_1=2.8 \mathrm{~cm}$ to $x_2=-8.3 \mathrm{~cm}$ during the time from $t_1=3.0 \mathrm{~s}$ to $t_2=5.3 \mathrm{~s}$. What is its average velocity?  (数值)  $cm/s$ (only fill in numerical value please)

  A particle at $t_1=-4.4 \mathrm{~s}$ is at $x_1=3.1 \mathrm{~cm}$ and at $t_2=3.8 \mathrm{~s}$ is at $x_2=8.3 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete laps around mq1g.osr f(3b a quarter-mile ($1 \; mile = 1609 \; m$) track in a total time of 10.1 min. Calculate (a) the average speed  (数值)  $m/s$ and (b) the average velocity    $m/s$

  A horse canters away from its train v i 1ojuw:hs3l.nanaq .8)xm.er in a straight line, moving 100 m away in 11.6 s. It then turns abrupos .w:1xn lajmn.8i uaqhv)3. tly 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 frof43g yclrktv23;2ctu*clej (6t)z ksm $13 \; m/s$ to $22 \; m/s$ 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 fromkcp wxeohzi;i*47v/ve 2 +tf + $23 \; m/s$ to rest in a distance of 77 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reach a ob gpzm5xq 9e:y( gvee5/hx .-speed of $28 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $2.7 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinter can bueo48 68p pkf36xe:jt7dr aptsrst out of the blocks to essentially top speed aboutp8 rto 3jp648fptx7k6d:aes e $11.0 \; m/s$ 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 uniformly ffn;5brq d3( u*uq:n nsrom a speed of $21 \; m/s$ to rest in 4.27 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 theau b6 c4olrl-; highway. Assuming a bor4 al- ucl6;deceleration of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck goiot+;zda hn0o9 ng $25 \; m/s$ 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).    $m$