Suppose that an object travels from one point in space to anoth:rc1mc8nxsr5d 5j/i afpz46fer. Make a comparison between crnf zr:xca645s8 f/5pdj1 mithe displacement and the distance traveled.

  When is the average velocity of an object equal to the instantai f b/5brwx9*blc17 ndneous velocity?

  A new car manufacturer advertises that theirhynattn7di)/ / v06ny car can go "from zero to sixty in 8 s". This is at7 ih)/ 0adn6vy/nynt description of

  An object moving in the +x axgt0twe;3t4 i*xonby8 is experiences an acceleration of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to the East (+x direction) begins to slow down( y khgs9.zy3vne fu8/ as it approaches a traffic light. Make a statement concerning fe/.8guhs3 y9(yzknv its acceleration.

  Suppose that a car traveling to the West (-x direction) begins to slow down as *(7w/odoer woit approaches a traffic light. Make a statement concerning its acc (w/r*e7wooodeleration.

  Suppose that an object is moving with/3f-vezoh 13t jgve(p a constant velocity. Make a statement concerning its acceleratio3f g/3jvzoe (evh1-tp n.

  If the velocity of an object is zero, does it mea6 npfnp4 7/qcxn that the acceleration is zero? Support you q6pn/4cxpf7n r answer with an example.

  Can an object's velocity chang (6kodshe mei(sj kp,/,4okb4lp+ao7 e direction when its acceleration is constant? Supp7 , ae ok,bsp/+ jkemdl(i(46os4ohpkort your answer with an example.

  Suppose that an object is moving with constant ayk/ tn;et*vgx -upfh t(x04q/n :as:dcceleration. Make a statement concerning its motion with respectnxnvy/q(0tauk g* p;d/f4:xs h: t-te to time.

  Can an object have increasing speed while its acceleration is decreasing? *chap f38;vjdSupport your af d;a3c* vjh8pnswer with an example.

  Suppose a can, after an inbr xnyzx +r46bdd3 al;b,lxmp:*n 3l ,itial kick, moves up along a smooth hill of ice. Make a statement concernlb:abnxpnz +l3; d *ry4xbm,3d 6xr l,ing its acceleration.

  Under what condition is average velocity equal :k9w rrir*d j).-xeoeto the average of the object's initial and final .ik* wjrx- rer)9 :edovelocity?

  Objects A and B both start at rest. They both acceleksatymne 5 g.7+mw- o6rate at the same rate. However, object A accelerates for t kwng ame5.y-7o m6s+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 both accelerate at the same-m38pi583zqd ycb oys rate. However, object A accelerates for twice the time as object B. What is the distance traveled by object A compared to myqzbc-s3d5io yp8 8 3that of object B?

  When an object is released from rest and falls i3hn n mj*yyefq +u5j7*9(,hmcwwq7d zn the absence of friction, which of tjd hw7w * q (uyy5m7ncj9,*m3qzfnh +ehe following is true concerning its motion?

  When an object is released from rest and falls in the abs5+:lnms m5ahe ence of friction, which of the following is 5lah5: mns+me true concerning its motion?

  Suppose a ball is thrown straight up. Maked6*wu2z l)t)iu -zy b1utp7mg a statement about the velocity and the acceleration when the ball reaches t)zdb 6u1w 2)u*mzi tgpl- tu7yhe highest point.

  Suppose a ball is thrown straight up. What is its acceleration,,n 4d lhj;jhbfwn0 )d just before it reaches its highes,f0d d hl,)w;jhbj 4nnt point?

  Suppose a ball is thrown straight up, reaches aqdi2p9w j;4u20lh/ lothug*a maximum height, then falls to its initial height. Make a statement about the direction of the velocity an ;wquh/lu4*o tl92p0a2 dgj ihd acceleration as the ball is going up.

  A ball is thrown straight up, reac vvc3y(8r9d vrhes a maximum height, then falls to its initial height. Make a statement about the direction 8d y3(9 cvvrvrof the velocity and acceleration as the ball is coming down.

  Suppose a ball is thrown downward in the absence of air resistance. M nemkmgh0o m .(30,vybit65udake a statement contm6y uv0mok.gb35i (hn0 em, dcerning its acceleration.

  Suppose a skydiver jumps from a high-flying planentd7n/bged+z(k5ef6uw 9- lu . What is her acceleration when she she reach+t/7g zkw6(nlfu u9-n5debedes terminal velocity?

  A ball is thrown vertically upward with a speed v. An identicalyrmy1 erq- 7 hohq/ybm, 4ug-3ijuw 8; second ball is thrown upward with a speed 8h, yowgjqihm r;1ry/4y-uu e7q-b m32v (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 first ball?)

  Ball A is dropped from the top of a building. One second later, ball B is droppm)lds)ia:1 ;xrc mvch uhr4:;eh,ld1ed from the same building. As time progresses),;l :c dhvrde41im ) hhlmuxa1c:sr;, the distance between them

  Ball A is dropped from the top of a building. One second late ra;/;oddo3 fonhyn *t6qu* +er, ball B is dropped from the same buil*o6yohnafu + rddo;3*et;qn/ding. As time progresses, the difference in their speeds

  Two objects are thrown from the top of a tall building. / )g)idnipn1 r One is thrown up, and the other is thrown down, both with the same nnr1)i )idp/ginitial speed. What are their speeds when they hit the street?

  A brick is dropped from the top of azjm )m8p cd s)*v9gf/e building. A second brick is thrown straight down fpc8zdj)/*)vemg9 s mfrom the same building. They are released at the same time. Neglect air resistance. Compare the accelerations of the two bricks.

  An object is moving with constant non-(hyo 8 d(pk(p- w(ty3pao)f jqzero velocity in the +x axis. The position versus time graph of this objed ajp8-()tok3q((ywpp hy(foct is

  An object is moving with constant non-zero acceleration in the +x axisfk d(+k8pyxu e49*(hd8d4vjp c ovs0f. The position versus timev kd+k((*8u4eh98 jsdycxp4dvfofp 0 graph of this object is

  An object is moving with constaif8e3 y p ::cd,c2q(5xsvcwd int non-zero velocity in the +x axis. The velocity versus time grap3cde qpxys8 (f vc:iidw :52,ch of this object is

  An object is moving with constant non-zero accelerati.iox*xxfoi/s*n/e k fbbgk13 .kav9; on in the +x axis. The velocity versus time graph of ti1 v an..go xkesx9b/k; fbfo**ki3/xhis object is

  The slope of a position ver77adjc dn,ut ;sus time graph gives

  The slope of a velocity versus timx8tj x g iq1wt(hemy8 73z9+oke graph gives

  The area under a curve in an acceleration versdefbnhp * to/cog1 488:jkga8 us time graph gives

  The area under a curve in a velocity c;x ih4 op8xk0versus time graph gives

  If the position versus time+oso ;3vs8v)pmr k1 xhiguc*0 graph of an object is a horizontal line, the object ivrp3)iv;o01 *hucxk sm g+8 oss

  If the position versus time graph of an objvv2ue8km.sd 9y(d hqlkkh 607ect is a vertical line, the object ish.0k 82 dh 7myd(qelkkvs 6vu9

  If the velocity versus time graphd(fb,om;- bsyltxk;,3kikh n-u wu , 0 of an object is a horizontal line, the object s,x(y3,m;uo wb fkutkk;n,bhl- d 0-iis

  If the velocity vers f lwmp6r8x(1 c3p(p s4b,birj/hx+ udus time graph of an object is a straight line making an angle of 30 degrees with the time axis, the objec, bh(38fc pxi/rs1lj 4dwrxpm+6u(bp t is

  An object moves 15.0 m north and then 11.0 m south. Find both the distance tra 46 / wk6kgtkcb(srcb6veled and thecbk6w( kt c gk6sr6/b4 magnitude of the displacement vector.

  A boat can move at 30 km/h in still water. How long will it take to move 12 lifexxs6hh wkaa7i 63 (-1m;nkm upsti-ks67wx3 flh xi1 mh(ae;6a nream in a river flowing 6.0 km/h?

  55 mi/h is how many m/s? )ufa7z ni8dj7(1 mi = 1609 m)

  What must be your avera57 zbkl.3c ohyge speed in order to travel 350 km in 5.15 h?

  A runner ran the marathon (approximately 4h:8ivwtp9hp(ur: i9 b 2.0 km) in 2 hours and 57 min. What is the average speed of::t9w b9hpr vhi8 (iup the runner in m/s?

  A car travels 90 km/h. How long does itiv 6uh24cbh:/dk +atq take for it to travel 400 km?

  A ly (light year) is the distance that light travels in onelmt e;gk id(;5 year. The speed of t5g;m (lid ;eklight 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 lug-chui) 9qv q :) 0glbyq-zy- ca1hl-ook to the side for 4.0 s, how far do you travel during tq-1ygcy-q:hib -lu-) lz09 a)qvgcuhhis inattentive period?

  If you run a complete loop a;* xo4ebjgok.round an outdoor track (400 m), in 100 s, your average velocity isx*koj 4eg;o. b

  A polar bear starts at the Northkhz5 m5+.iru8 * rqomf 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 zr *.rim5k5q 8 fohum+45 min. What was the bear's average speed?

  A polar bear starts at the North Pole. It travels 1.0 km south, then 1.0 km m*zn8q ihx4a9h:s * xzeast, then 1.0 km north, then 1.0 km west to return to its starting point. This trip takes 45 min. What was t*:z8mzq4 xhxai hn9s* he bear's average velocity?

  You are driving home on a weekend bo 3 cui7 a/;z;sqyc/mfrom 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 15 minutes. Hos7yum; q3c/czb/a i;o w 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 avek oh1z-tlxv y 9pp3m)18tv du+rage speed of the motorist for this trip?v8y+lzmhp-ok) u9tv 3 dt xp11

  A motorist travels for 3.0 h at 80 km/h and 2.0 h at 100 km/h. What is her a:,lexqtl3mu0v nd )k.verage speed for th3llv.ux:m ) t0 dne,qke trip?

  An airplane travels at 300 mi/h south f3cowh6 k+ ji7aj4,pb mor 2.00 h and then at 250 mi/h north for 750 miles. What is the avejckm76+ bja43wp,ho irage speed for the trip?

  In a 400-m relay rac qo1+/63x hgntz(y whqe the anchorman (the person who runs the last 100 m) for team A can run 100 m in 9.8 s. His rival, hq+ oq3xhtnw y(/1zg6 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 13 s. The car'ss+*6 wvejg u1 xnho.:s average velocity during deceleration was 71 km/h.we1svs hn6ugjx*o +.: What was the car's deceleration while slowing down?

  An airplane increases its spr4s(zrmo ebc1n. vr-0eed from 100 m/s to 160 m/s, at the average rate of crorzr.n s -(14mb0ve$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h accelerates x w(si0y.6pz/t. sevp 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 r0j yu p9i2loh2est and 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/pq5ly-0:z9qtrka 0x+cu x6x is for 10 s. It then speeds up with a constant accelerationq0 6 0yi+azk5qxltpucx -9xr: 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 2.7 m/s experienc 3w 5+fkzez/ates a constant acceleration of/e t+ k3waz5fz $4.3 \; m/s^2$. What is the cart's displacement during the first 4.1 s of its motion?

  A bullet moving horizontally to the right (+x direction) wit9g e5(:cdx,p w):gjhmwp,j k rh a speed of 501 m/s strikes a sand cg9jwmg(kw : jrep),: ,h5dpxbag and penetrates a distance of 64.11 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. bsyk mav9n2/v:n a(o/ 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 the le svynk2moaa( vn/9b:/ ngth of the catapult?

  A car starting from rest moves with constant acceleration o jkz1,hx 38soef $2.0 \; m/s^2$ 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. j;mvd+l qx+r.*n+ sxv What is its average acceljvld+; r +q.xsnx*+ vmeration?

  An object starts from rest and undergomxk 1axxe (,7les uniform acceleration. During the first second it travels 7.6 m.m1ke(,7xa xxl How far will it travel during the third second?

  An object is moving in ; aof(w 037.ozgwiyssa straight line with constant 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 tim; zo 7sfgiw3o as(.w0ye?

  A car starts from rest and amu, 9b;du*yj ijl8ii35 uhe1gccelerates 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 roadro80 l5hvbry, .jl(pneh (9ts 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 xzjmf)725r l;b lkuo) car that has been waiting at the inter2 uboj5r l);xlf )kz7msection starts ahead 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 on the suekpce7.7*s,l r -be oqrface of planet X where the acce 7oce r* pq,es-ebl7.kleration 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 the surface of planet X *lf4 luyzex(. where the accelera4 (zu.lyxle*f tion 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 15 m/s on t63o(l1ry kwkl wx )v,e5t5dx lhe surface of planet X where 13l, vkdlwlwyo5 )tr( xk6x5ethe 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 upw yjrv)p 4mm9(/xvgaf3 4zrfl;ard with a speed of 14 m/s on the surface of planet X where the accelerati vjvz(9a; x4mr r/gfyf)mlp34on due to gravity is $3.5 \; m/s^2$. What is the speed of the object after 8.0 s?

  Human reaction time is usua56c);6r.ilbpi+y9 (fkp aclhb jy3h jlly greater than 0.10 s. If your friend holds a ruler between your fingers and releases it without warning, how far can you expect the ruler to f cb96h6ki)jfp+ry5;(a y jpih llcb3 .all before you catch it?

  A ball is thrown upward at a vel wj e:8rry3yj:ocity of 19.6 m/s. What is its velocity after 3.00 s?j8w3y:e ry:rj

  A bullet shot straight up returns to its start w*+6 oum fk/x78f,0xmaznam xing point in 12 s. What is the initial speawxxx 7 *,m /uomnk+az8fm60fed of the bullet?

  A ball is thrown straight up with a speed of 36.0 m/s. Hom0nu ) 43pe6ffi-pi,vntizoy:f-k d 7w long does it take to return to its starting poinn0f76emy-:i-)upn4od,fk3tfi iz p vt?

  A ball is thrown downward from the top of a building with a go0vo . q8+pdl(0nm nwh45butn initial speed of 8 m/s. It strikes the ground after 3.6 s. H8u o vnom0 (bwt5g. q4hndp0l+ow high is the building?

  A ball is thrown straight up withl/5ojfzj w*,of yb t5a,ebl67 a speed of 30 m/s. (only fill in numerical value in the bla75 jlt, b6aff*yol5bozw / ej,nks)
(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 38.8 (,gl8nz gnn v8w/ f2tdm/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 13 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 13.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what is the velocit4)mwb0nfbo6/o6kn rz v ,snf6n a;br: y at t = 1.0 s?

  In Fig. below, what is the velocity ak-s8wdbn rs;3j7lna st*kj lt*x:.x 0t t = 2.5 s?

  In Fig. below, what is the velocity at t 2ga aqhhrhx9d- h.o91= 4.0 s?

  In Fig. below, what i: qk5nx. z s8f1 uhtyrpq,ai d+:zyc gd,ka.4)s the velocity at t = 5.5 s?

  In Fig. below, what is the averageh 1rxdoxy3qp/(- xbm3 k)q 9xh velocity from 0 to 4.0 s?

  In Fig. below, what is the average vel xdq2 (mzmjx)jcs/isb8e 67 .rocity from 0 to 6.0 s?

  In Fig. below, what is the a/)8 :, qgip dt2ttsouhcceleration at 1.0 s?

  In Fig. below, what is the acceleration at 3.0 sq m31o5ie(ku(j yvl 8o?

  In Fig. below, what is th3ar;eb 11bt.o ;ftzm -nv*n cie average acceleration from 0 to 5.0 s?

  In Fig. below, what is the average accel onj2crj) 4vz6eration from 0 to 8.0 s?

  In Fig. below, what is the displacnuvk(sar i94s mi c-:*ement from 0 to 8.0 s?

Does a car speedometer measu(fmp x,*slk(ama;) j zl1 h:anre speed, velocity? {speed|velocity}

  An object can have a varying speed if its velocit.2me b9 nmumu,l.e7xth yv+m9 y is constant.

  The velocity of an object can be negawbu(r*63 whg htive when its acceleration is positive.

  If one object has a greater speed than a second object, the first must htjq l0 ,17z8vpf0pwwxave a greater accelerati1jltzp wf0w0 v7p,q x8on.

  Two cars emerge sidej51rqq gn(9.s .vkoex9z vwv0 by side from 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(z-ly1o;9hq mp4 tqmxu8alz j/ s ;ic+ acceleration decreases.

  A baseball player hits7qt/ q xh+8+rnkpe8az a foul ball straight up into the air. It leaves the bat with a tnh a7/e++qq zkp88xrspeed 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,l8*d(ohkya *f8cx7*sjpp 6pw what is happening to its acceleration, how does it change if air frictiojp pf*6wyxlopsd7 k*8h*8c a(n is ignored?

  As a freely falling object speeds up, whacc5-gmi7uf5c n 3fap)t is happening to its acceleration, how does it change if air friction CAN NOT be 5gancff3u)cip 7-5c m ignored?

  An object that is thrown vertically upward will retuu77; m0v37*noeelnm tj/ma bnrn to its original position with the same speed as it had initially if air resistance is negligible. If air resistance is appreciable, how will th;j3u7 77nao0*nnmbv/ te mem lis result be altered?

  An object can have zero velocity and nonzhjgn(b ((3xt njitr, -ero acceleration at the same time.

  An object can have n 3qdcbly. etw im*++.ponzero velocity and zero acceleration at the same time.

  An elevator moving from the second floor to the fifth floor making no stfw uwt67cnaisw90 r/0j*f3l zops along the way has ze*j0fzc9t asf7n6wuw 30/ir wlro acceleration all the time.

  A rolling ball moves fromxrpum ;4/vs*:ujc2hc *l; skm $x_1=1.8 \mathrm{~cm}$ to $x_2=-7.3 \mathrm{~cm}$ during the time from $t_1=1.0 \mathrm{~s}$ 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 $t_1=-4.1 \mathrm{~s}$ is at $x_1=2.1 \mathrm{~cm}$ and at $t_2=4.2 \mathrm{~s}$ is at $x_2=8.2 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete laenyb4upi, 91c ps around a quarter-mile ($1 \; mile = 1609 \; m$) track in a total time of 9.5 min. Calculate (a) the average speed  (数值)  $m/s$ and (b) the average velocity    $m/s$

  A horse canters awaypdyg1k2s- 2gxl8 yu 8rk48awu from its trainer in a straight line, moving 90 m away in 13.7 s. It then turusgr- p8 8ax1ygu 22 kdwykl84ns abruptly and gallops halfway 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 from a9t fdt45k 5nv$10 \; m/s$ 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 fromu3qlscoy) ,+1vek.j y $17 \; m/s$ 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 speed oq *s93/y 4lu otkugsn)f $26 \; m/s$ 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 ckm1 6kv4 gh5 oi08prhburst out of the blocks to essentially top speed about 0 68kh1omhp r 4kigv5c$11.0 \; m/s$ in the first 10.9 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 fromk emxs a6u 5:btd9,i+a a speed of $21 \; m/s$ to rest in 4.66 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. Assumingn p v6o)6gc,h f*ym.uj a decelerationc,o jg)p66 mv*h.fynu of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck goingaxr .l 4ugi ste+5br3rpu.p *6 $25 \; m/s$ 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 les(s 0*7gq ycerus than 30.0 min. After exactly 27.0 min, ther(e0qyu7sr*cg e are still 1100 m to go. The runner must then accelerate at $0.20 \; m/s^2$ for how many seconds in order to achieve the desired time?    $s$