Suppose that an object traqkdqv/z:c90e vu *.rgvels from one point in space to another. Make a comparison between the*r9ku. g 0vv:/qd czqe displacement and the distance traveled.

  When is the average velocity of an object equal to the instantaneouo0flfxk9 m: m(s velocity?

  A new car manufacturer advn 7 0*me/ t.k5c1 rofrvnfyyv7ertises that their car can go "from zero to sixty in 8 s". This is17r*nyyn rm0 e57vvoc/ft f.k a description of

  An object moving in the +x axis experiences an m+y:op*5qsgj acceleration of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to the East (+x directiqm7 3jj :ptskbm0f)) hon) begins to slow down as it approaches a traffic light. Make a statm)jjht p:b37 m)q0f skement concerning its acceleration.

  Suppose that a car traveling to the West (-x direction) begins to slow down as i; orvjfz5f; r4ry)f5zt approzv;) r5 f 4zryj;fo5fraches a traffic light. Make a statement concerning its acceleration.

  Suppose that an object is moving n5vh/9ttwp): qx dkq5with a constant velocity. Make a statement concerning its 9)qv55k:htwd n/q txpacceleration.

  If the velocity of an object is zero, does it mean that the 1jcg5: vso0w vacceleration is zero5 c0osv1 g:wjv? Support your answer with an example.

  Can an object's velocity change direcm*hjx0 d xl;*m )7sry24pemiution when its acceleration is constant? Support your answer wixy*;ihrm *4 0jxuel s)m7d p2mth an example.

  Suppose that an object is moving witvrckw2z) 97 hiwap03 w w-0tlwh constant acceleration. Make a statement concerning its motion with respect hk7 )9wwipwrt302c-l w0w azv to time.

  Can an object have increasing s6yo*b+ xsost8 5i;j; mmwxeb0peed while its acceleration is decreasing? Support your answer with an exa0xej;sosbi w*m mo 6 y5x8b;t+mple.

  Suppose a can, after an initial kick, moves up along a smooth hill of ich9:52 m4kw c datxka +y+xdl 4xeqb(5je. Make a statement a4(xbt5:+hc2jm y 4 k dd59axqe+wkxlconcerning its acceleration.

  Under what condition 4nkcr6dfmvk, , 1hl*,nq)fv sis average velocity equal to the average of the object's initial and 1,rq)kkl,nv f * n hmf,6vs4dcfinal velocity?

  Objects A and B both start at rest. They both accelerate at t glh9m ly c92;z5e2x+2hrg bevhe same rate. However, object A accelerates for twice the time as object B. m+ey;el 5gbc2 2v9lr 2 hxz9hg 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 ,sn3+f9:omvlnv v*c gthe same rate. However, object A accelerates for twice the time as object B. What is the distance traveled by object A compared tov, n vlvos+gfncm9 *:3 that of object B?

  When an object is released from rest and falls in the absence of friction, wh/hy psjn 7u)wrwu8 ,7 qfc.w7gich of the folf8s w7,7uj 7yhcr)wupn/q w.glowing is true concerning its motion?

  When an object is released from rest and falls inq*r m+h2f c;d(xe sh5l the absence of friction, which of the following ihe 2(f;r5lm *+chsxqd s true concerning its motion?

  Suppose a ball is thrown straight up. Make a statement ab d-b0l95)dei :np0fpm(nj wxm out the velocity and the acce d lnp) fm90ewbinx5p(0djm-: leration when the ball reaches the highest point.

  Suppose a ball is thrown straight up. What is its acceleration just befki (so6fp2 :nqore it reaches its highest q:(sponf62 kipoint?

  Suppose a ball is thrown straight up, reaches a msk3j6 o,2-0u at)wi*p.ojzno twot j-aximum height, then falls to its initial height. Make a state3.jtwtw,o-- s)0iajopn kzt 62jo*u oment about the direction of the velocity and acceleration as the ball is going up.

  A ball is thrown straight up, reaches a maximum height, then falls toa8 )ilit:jfv 1 its initial height. Make a statement about the direction of the velo v:t)8ai1 lfjicity and acceleration as the ball is coming down.

  Suppose a ball is thrown downward in the absence of a lug:m;3. xcvtir resistance. Make a statement concertxvu;g:3 .clmning its acceleration.

  Suppose a skydiver jumps from a high-flying plane. What is her acceleration whxt 9(g,hts r*hen she she reaches terminal velohg9r* ,( htsxtcity?

  A ball is thrown vertically upward with a speed8 (h1( b6ckvwyccdk; d 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 sek khb16yc d(w(; cv8cdcond ball go than the first ball?)

  Ball A is dropped from the top of a building.o j5(cx4id 5 cm4zbgb7 One second later, ball B is dropped from the4z (m7bg icdbc5o5x4j same building. As time progresses, the distance between them

  Ball A is dropped from the top of a building. One second later, ball B lz ulrv0e22m kve7,-wfr,u3v 3xc8 vo is dropped from the ,e 2lv3f,wx0vule7c 8z-vkm32 vuro rsame building. As time progresses, the difference in their speeds

  Two objects are thrown from the top of a tall building. One is thrown up, and y ,bq6(c( 1 iaf4zqezwd kg2i(the other is thrown down, both with the same initial speed. W4bd ,(aci zqw(2fzg iek6 qy1(hat are their speeds when they hit the street?

  A brick is dropped from the top of a building. A second brick is throwc +bck4j-ot id8j*yf2n straight down from the same buildi+jo-k2ijdbf*t4y8c c ng. They are released at the same time. Neglect air resistance. Compare the accelerations of the two bricks.

  An object is moving with constant a7/jyhm 2 uum,,+oq iunon-zero velocity in the +x axis. The position versus tiij o, um,y+am2qu7h/ ume graph of this object is

  An object is moving with constant non-zero acceloz0tlle.f + q)eration in the +x axis. The position versus time graph of th)f0ltzeq .l +ois object is

  An object is moving with constant non-zero velocity in the +x axis. The veloc/v/8a3xhc0 hmj f( ehwity versus time graph jch/ 3wmxv(e/fh0h8a of this object is

  An object is moving with constant non-zero accelerati ex5/y;/xoo1ei 9dun son in the +x axis. The velocity verse x9sod no/e/iuy;5x1 us time graph of this object is

  The slope of a posithk 75t7r/9q3tnhuw ; yadpd.xion versus time graph gives

  The slope of a velocity versxg;0q 4ju7x-ii/+3*i f t(yby hercd pus time graph gives

  The area under a curve in an acceleration v+ ba kfaen ;2(8ewwq:ix02gm cersus time graph gives

  The area under a curve in a velocity versus time graphn;huzzzj6 98v gives

  If the position versus time graph of an object is a horizontal line, the ogd,2v6imdlhz* 4 n9ut v d:b:xbject n vhm ,txu6dliz v49dd:2:b*gis

  If the position versus time grif*mm4;o0v2y(cv cv q /wwa-naph of an object is a vertical line, the object is iwq/mn(y co;vmfa20c *w4vv-

  If the velocity versus time graph of an object is a 30jv b w0(gjexl(hs1khorizontal line, the object isl0 3xbhvje 1w(k0j(gs

  If the velocity versus tw. vi )pg(qsf5e+j-a kime graph of an object is a straight line making an angle of 30 degrees with th)5e jw. vfapg(k+q-sie time axis, the object is

  An object moves 15.0 m north and then 1jo mk- .ub9wr71.0 m south. Find both the distance traveled and the magnitude of the displacement v9ow.k jbu -r7mector.

  A boat can move at 30 km/h in still water. How lonxf7 ks *zb- 2b0bp5kxng will it take to move 12 km upstream in a river fbnb *0zs xp2fk5-7k bxlowing 6.0 km/h?

  55 mi/h is how many m/s? (1 mi = 1609 mzm ;v fn2e /ih+5 :(efv-hulnh)

  What must be your average speed in order to trav x :tr .pw+xjgr;5q+fiel 350 km in 5.15 h?

  A runner ran the marathon (approximately 42.0 km) in 2 hours and 57wo/qf -do (g3 mfjg9f.6htn)t min. What is the )fdtfgn. g(mojoh t9 /q63wf -average speed of the runner in m/s?

  A car travels 90 km/h. How long does it take fo 1g, e+bdawjxd l b5).uglep90r it to travel 400 km?

  A ly (light year) is the distance that light tr8ldooo0 j+ ot t(,tjw9avels in one year. The speed of light ool+t to,w o9 8(jjdt0is $3.00 \times 10^8 \; m/s$. 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 sidex iz ,xn),k/6cv j+mk mjo0.ga for 4.0 s, how far do ,0m.gin6c,ak)z+xvomjj x /k you travel during this inattentive period?

  If you run a complete loop around an outd; x. 6vxigdmgq(a;wn2oor track (400 m), in 100 s, your avera( qgw;26;.dxgiavxn mge velocity is

  A polar bear starts at the drq qy((ra+9jNorth Pole. It travels 1.0 km south, then 1.0 km east, then 1.0 km north, then 1.0 km west to retudajr(q9 yq(r+ rn to its starting point. This trip takes 45 min. What was the bear's average speed?

  A polar bear starts at the North Poledgs-jwk1 h3.3oky7li . It travels 1.0 km south, then 1.0 km east, then 1.0 km ohs1.dlg- j 37ykw3ki north, 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 at 55 h /4(up wqucs8. qrzp,. 9gdnzmi/h for 110 miles. It then starts to snow and you slow to 35 mi/h. You arrive home after driving 4 hourd, up zg4qcpws./9qurh(z. n8s and 15 minutes. How far is your hometown from school?

  A motorist travels 160 km at 80 km/h and 160 km at 100w4attrfr ri1 4c a)m5, km/h. What is the average speed of i4w51)f cm,rtr raa4tthe 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 h)oy z4ri6kqejk*hy,r 6 4g eh2er average spek hr4oye62,)*hjgyiz6 rqk e4ed for the trip?

  An airplane travels at 300 mi/h south fojfjzo c:7 aj/ ,nve7,nr 2.00 h and then at 250 mi/h north for 750 miles.jajjef n:vnz7 ,,o /7c What is the average speed for the trip?

  In a 400-m relay race the anchoh (88 elwayhlyhwh;wfm5+ mon5(0 +sb rman (the person who runs the last 100 m) for team A can run 100 m in 9.8 wlsf(ayl0m8e +yoh(hbw +hm58hwn 5;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 s. The car's averagejge, ;j;8smwrytte2;o 3d8pz velocity during deceleration was 67 km/h. What was the ca32erweo;;jg y88mtspd,tzj ; r's deceleration while slowing down?

  An airplane increases its speed from 100 m/s to 16 6oho +dhpz6n)m tps*x+5 /kvg0 m/s, at the average rate of +p+/xodth)m 6n s 5hg6 vpo*kz$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h acceleratesd 1x4y tl42n9dr1v mxu 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 and acceleraf nuvy/pxoyb2*)6o 3 xhvcjr 4l* i3.btes 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/id hkyv3ed0kn, ts)6 3s for 10 s. It then speeds up with a constant acceleration 63dtnd0yi e k3, skh)vof $2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial velocity of 4.7 m/s experiences a constant accez ntojh(9 3t-*aec,lvleration of -(*9tv aoz,l tjc3enh$2.5 \; m/s^2$. What is the cart's displacement during the first 4.6 s of its motion?

  A bullet moving horizonnmap;,x:jm kto )97 tqtally to the right (+x direction) with a speed of 333 m/s strikes a sandbag and ppmt ; xak:mq t,oj)n97enetrates a distance of 60.43 cm. What is the average acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is launc r)z+tk/ oo*vnhed from a catapult on an aircraft carrier. It reaches a speed of 42 m/s at the end of the catapultkt / *+)zorovn, and this requires 2.0 s. Assuming the acceleration is constant, what is the length of the catapult?

  A car starting from rest moves wityl r nt34a()1eho*ga zh 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 io+rgt0 (.pjzv)2 urgk2c wy7r s its average accelertwr r+po 27z g)c0k vj.(r2yugation?

  An object starts from rest and undergoes uniform acceleratio .9tyjcv 6zi w,)(ct,zx*vtson. During the first secondz zct,9tst y.6xi( wvj),c*ov it travels 9.6 m. How far will it travel during the third second?

  An object is moving in a 33ofoz7 mjo.yd)t j3h straight line with constant acceleration. Initially it is traveling at 16 m/s. Three seconds later it is traveling at 10 m/s. Hom.h3odoy 7o 3 3jzfjt)w far does it move during this time?

  A car starts from rest and accelerates uniformly at t56ec a o1 jmryq::7e b0uy.hb$3.0 \; m/s^2$. 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 roarv6u* 6sx+u-y ip 1cutd 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 greenu p2d/mu3i*due +7ln p, a car that has been waiting at the intersection sdp u+uulp*i n37e 2m/dtarts 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 th aycdix. 7x:8a+d*qlee surface of planet X where the acceleration due to graqaed7 xax+*.lycid8: vity 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 oixjrs vl0c xs*))75fb f planet X where7rf lvi)x0s )bc5xjs* 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 upward with a speed of 15 m/s on the surface of plane2sv aaddm: vwpc96( 7v aus)m2 uvu,h+t X where the accelerationu6ash+v2md,vpua(7vam2ucsv :w 9 ) d 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 surface of planet X wheaqq;n (qao 2m cl58:h8thbgd8re the acceleration due to gravityn; baqgdqt:h ( mqac8l 2o85h8 is $3.5 \; m/s^2$. What is the speed of the object after 8.0 s?

  Human reaction time is usually srw(6uz7 ,frw -chd11 q cjda:greater than 0.10 s. If your friend holds a ruler between your fingers and releases it without warning, how far caqr7f(z,11crwadsh juc:6 w- dn you expect the ruler to fall before you catch it?

  A ball is thrown upward at a velocity of m. xakb mpqm8ezm):0219.6 m/s. What is its velocity after 3.q: xmemk).mm2p8 b0za 00 s?

  A bullet shot straight up returns to its starcqzm2b(x- +s o; )qkagting point in 13 s. What is the initial speed of the bgm;q( c-+x2oaq)k sz bullet?

  A ball is thrown straight up with a speed of 36.0 m/s. How long does it ta. y0b8gvu(le am 7jk5ike to return to its starting a .kly5 m80bv7gjiu(epoint?

  A ball is thrown downward from the top of a building with an init-0 fgzb r,xh;uial speed of 16 m/s. It strikes the ground after 7.0 s. How high - br;,x0guf zhis the building?

  A ball is thrown straight up with a speed of 30 m/s. (only fill in numerical gvu.u3os , ef0kf(z)nvalue in tu(uf .gz),k 0ensfvo 3he 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 wi5(pm2ca a, rtb 8hp8enth a speed of 32.8 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 10 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 10.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what is the velocity at t = 1.0 : j55udpnoyteob)rql pra(lef,;52.s?

  In Fig. below, what is the velocix11no ll(9-xv2kuigzi. g:a kty at t = 2.5 s?

  In Fig. below, what is the ver/.r: b* bkldx fmisu9b9 96lrlocity at t = 4.0 s?

  In Fig. below, what is the velocity aq/khya sv +rwx46ex1) x gn4b+t t = 5.5 s?

  In Fig. below, what is the average velocity fr f4yqduz3jt9 a2th,o397)xjoo cvd3u om 0 to 4.0 s?

  In Fig. below, what is the average vely-lh x s*i)6m3 *nd5dqkj)gyg ocity from 0 to 6.0 s?

  In Fig. below, what is the acceleration at 1.dw0/ j:5gfg:ug v:2tg l (twpp0 s?

  In Fig. below, what is the accelgj.xlu,ihve bg1.is8. 9ojd 4eration at 3.0 s?

  In Fig. below, what is the average acceleration fz 25dlwdo z, v)mdv2f/jg.m 7from 0 to 5.0 s?

  In Fig. below, what is the averagei/(y0; eyxhp7 seq)lv acceleration from 0 to 8.0 s?

  In Fig. below, what is the displacement3ksn8dveni 7ks1epx8 8+ vr0a from 0 to 8.0 s?

Does a car speedometer measure speed, velocity? {speed|velo lda/xl41 ivv3city}

  An object can have a varying speed if its velo t 1lrizteup-**:sd xa797vfjcity is constant.

  The velocity of an object can be nu+hfn)rk*1 t bhm.7qbegative when its acceleration is positive.

  If one object has a greater speu wbn(gt-);sg( ho1zmhin 22med than a second object, the first must have a greater acceler-2gzt(i)hwmsn( ;m gbh oun21ation.

  Two cars emerge side by side from a t+ zgq4(g -wjsfunnel. 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 axo-+2;p1 ga gutg:adus its acceleration decreases.

  A baseball player hits a foul ball straight up into the air. Ito1v ;jmxi r *1 wakltf2u,f.*h leaves the bat with a sperx1 v hau.tj k f;*imlwfo21,*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 speeds up, what is happening to its accelkd7o, nd2iq mfi4-aj6eration, how does it change if air friction iskf7o q anj4-,imd d6i2 ignored?

  As a freely falling object speeds up, what isp-k*uo(+p czsdzp 1f28c ag 6s happening to its acceleration, how does it change pocd 61+gpp8(sc zzs2a k *uf-if air friction CAN NOT be ignored?

  An object that is thrown vertically upw0yhv( rj4xms 20 p,lk: f qoes*bqpg+1ard will return to its original position with the same speed as it had initially if air resistance is negligible. If air resistance is appreciab1bjgxf:s(o hp,s plkqrq2m*0y e4+v 0 le, how will this result be altered?

  An object can have ze qc +//16xa*ohtf fwhhro velocity and nonzero acceleration at the same time.

  An object can have nonzero velo0h;astl*j+ikk a 4tx(p1/zev city and zero acceleration at the same time.

  An elevator moving from the second floor to the fiftf(zflcierqqve2- t ,w,s6qhu7y :)e1h floor making no stops along the way has zero acceleration all the timewz27 y-)(fqq :,q eesvetu 1cflir,h6.

  A rolling ball moves fro.axkuc(:* lv sm $x_1=2.2 \mathrm{~cm}$ to $x_2=-7.9 \mathrm{~cm}$ during the time from $t_1=2.1 \mathrm{~s}$ 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 $t_1=-3.7 \mathrm{~s}$ is at $x_1=2.8 \mathrm{~cm}$ and at $t_2=4.2 \mathrm{~s}$ is at $x_2=8.3 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete laps around a quarter-mile (2q8jk0,k+v(tia kb n5thp,fw$1 \; mile = 1609 \; m$) track in a total time of 10.6 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 lv rxk37qbi;3a straight line, moving 96 m away in 9.7 s. It then turns abruptly and gallops halfway back in 4 qv37;3brxki l.5 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 /,myyn.mu0ppwu .w 0n$10 \; m/s$ to $23 \; m/s$ in 4.5 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 from .rapp.tp :p x7 l+0gtz$19 \; m/s$ to rest in a distance of 85 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reahkqop stcwi 5s6 n) kdr;):):ech a speed of $32 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $2.5 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinter can burst out of the blocks to essentially top speede sd6fkx--sp /r9idh9lb. q7h about 9drekdxh s76qf.hli-/9 sp b-$10.0 \; m/s$ 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 unif(9 preu3,)oyedg 8cqbig* o1lormly from a speed of $18 \; m/s$ to rest in 4.45 s. How far did it travel in that time?  (数值)  $m$

  In coming to a stop, a car leaves skid t1eo:0ixs im(cm+: vi marks 92 m long on the highway. Assuming a deceleration ofeii c10msv:i+t:ox m( $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck g)a/ + huew;mh, +x8env2vswo0y /lb aaoing $25 \; m/s$ 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. Aftk-zfzt6ld, h77nbb d(er exactly 27.0 min, there are still 1100 m to go. The7lh dzbf,d7t6zbn k- ( runner must then accelerate at $0.20 \; m/s^2$ for how many seconds in order to achieve the desired time?    $s$