Suppose that an object travels f1-;k7gkqky no rom one point in space to another. Make a comparison between the disoky k-7qg;1 knplacement and the distance traveled.

  When is the average velocity of an object equal to the instantanef 8jfcf1i ..bpous velocity?

  A new car manufacturer advertises that their car can go "from zero to ho8vg)sp3c (lmb .j* bsixty in 8 s". This is a descriptp lovhc*bmjs3 b(8g).ion of

  An object moving in the +x axis experiences an accelrw/ i9q3p 3dg iccr,6w;oa v9ceration of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to the East (+x direction) beg-/cldy g aa6+qins to slow down as it approaches a traffic light. Make a sta/ aa6 g-+ldyqctement concerning its acceleration.

  Suppose that a car traveling to the West (-x direction) begins to slow z, op w0m6sxw8down as it approaches p w,mxz8ws0o6a traffic light. Make a statement concerning its acceleration.

  Suppose that an object is movk3 )9i;bd r4lh )rcyq5n poho7ing with a constant velocity. Make a statement concerning its a5)4oc9pr3 od;k)y hhrnil 7qbcceleration.

  If the velocity of an object is zero, does it mean that the5f0n,ysf/t mcg2 n9cq acceleration is zero? Sup tmgsn059cn 2y,fcq f/port your answer with an example.

  Can an object's veloci 6-o; fwve; cgv(rp.at(nkv l9ty change direction when its acceleration is constant? Support your answer with an exat;opn9ew;.6fvg a((k -v vlrcmple.

  Suppose that an object is moving with constant ae*d7*2frea j acceleration. Make a statement concerning its motion d e7*aerf*j2awith respect to time.

  Can an object have increasing speed while its acceliyng04.x ;gicpyf88m eration is decreasing? Support your answer withcyp yi fi;8xm g.n48g0 an example.

  Suppose a can, after anf)r.q:c7;xjgw: lwb:yg 6qo j initial kick, moves up along a smooth hill of ice. Make a statement concerning itrwb.ly ; qg)f:j: oc7x 6g:wqjs acceleration.

  Under what condition is averaghfp 531 +rq1luiefyo8/ iv;zde velocity equal to the average of the object's initialp;fq3 1u5i+ ivdyle r/o1fhz8 and final velocity?

  Objects A and B both y8,svx8 ferb +;oqys;*g gt6c start at rest. They both accelerate at the same rate. However, object A accelerates for twice the time as oy bqo vy,g+t; 8s6rsg*8; fexcbject B. What is the final speed of object A compared to that of object B?

  Objects A and B both start from 0l-bjs*l5c x inc:nv*/5inqa19gvic rest. They both accelerate at the same rate. However, object A accelerates for twice the time as object B. What is the dis5 xcv1-jncniicg*:b9il0v*s nla /5 qtance traveled by object A compared to that of object B?

  When an object is released from rest and falls in the absenkn (. g0m0kpfhce of friction, which of the follow 00(knmp hkfg.ing is true concerning its motion?

  When an object is released from rest and falls in the absence of friction, whic3-fj tnz/igb;h of the following is true concerning t;-/ 3nif gjzbits motion?

  Suppose a ball is thrown straigoz/pul 6av76s)c i6xpht up. Make a statement about the velocity and the acceleration when the ball reaches the /7liopc 6zs6v )axp6uhighest point.

  Suppose a ball is thrown straight up. Whakt+l)xrz1;qt, u/ d vxt is its acceleration just before it reaches its highest po /,z1xlvtxdk+) utq ;rint?

  Suppose a ball is thrown straight up, reaches +*u3o b :xloera maximum height, then falls to its initial height*:+ b 3urooxel. Make a statement about the direction of the velocity and acceleration as the ball is going up.

  A ball is thrown strai-oil4kwlav ,n 847ag3de2 gu f p;qs1pght up, reaches a maximum height, then falls to its initial height. Make a statement about the direction of the velocity and acceleration as the ball is cominq2png ao 48flwgedlp3;vs u 7,4 -a1kig down.

  Suppose a ball is thrown downward in the absence of air resistance. Make08 h/kg v8ikr3k auqw. a statement concerning itsq kvkru 8hi38w/g0ka. acceleration.

  Suppose a skydiver jumps from a high-flying pl/snmrm8gw( d5ru(m6 m 8aeq0 lane. What is her acceleration when she she reaches temn wgu mq(l8a0er/dr(8 smm65rminal velocity?

  A ball is thrown vertically upward with a speed v. An identical second bc3)m8aiu nx x:all 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 seman xi:xc )u83cond ball go than the first ball?)

  Ball A is dropped from the top of a buf:l ufo t. ++0(nsziksilding. One second later, ball B is dropped from the same building. As time progresses, the distance betwee l:k0u+stio(.+z fsn fn them

  Ball A is dropped from the top;l+m8zin9 jh n of a building. One second later, ball B is dropped from the same building. As time progresses, the di9l 8j;mnh n+zifference in their speeds

  Two objects are thrown frofg)u-5sud ye6b 9gz2rm the top of a tall building. One is thrown up, and the other is thrown down, both fz-u6u s d9e)bg25gyr 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 brickwvp 0/y-u,lm-. xg(yl2ie vz w is thrown straight down from the same building. They are released at the same time. Neglect air resistance. Cwiymzpylxvu(,/ -0 le-.vgw 2 ompare the accelerations of the two bricks.

  An object is moving with constant ev ; p t.fnlxtanwx) .8o29g5q0tbg+lnon-zero velocity in the +x axis. The position versus ti28f5n g.);eato9.lxpg b w l0vq+t tnxme graph of this object is

  An object is moving with constant non-zero acceleration in the +x asew3er/8t.dwb * 2m fes2l*c bxis. The position versus time gra ceew*sbb2r3 8/d*stme lf2.wph of this object is

  An object is moving with constant non-zerh h4/1o );v2 x (asuhix0*d,byntdxhoo velocity in the +x axis. The velocity versus time graph of t,; h2sd4hnxhhi)xo (t1v/ *ub ayx 0odhis object is

  An object is moving with consta2pgcdb5ux 6m )q -*z;5)co(hisj:qcikyjj p :nt non-zero acceleration in the +x axis. The velocity versus time graph og6jkbxppoz): ;j su c):c5 qc2q-dyhjim5 *( if this object is

  The slope of a position ve2-ttc ooueg72rsus time graph gives

  The slope of a velocity versus si;aviene6j-urjubt)t22i2fw1p 8ic az1 15 time graph gives

  The area under a curve in an accelery p (4lbb-s9ohb4ox m;ation versus time graph gives

  The area under a curve in a velocigirnmm- +sxu+/z h.y7 ty versus time graph gives

  If the position versus time graph of an objeczr 4iwx2h :2nvp5f o-st is a horizontal line, the object i:ir 252vph sxfz4w-nos

  If the position versus t3wc cffcbt6 2+t kz go:o31ty6ime graph of an object is a vertical line, the object is+3g btc2tf1 6 3w6 ctc:ozkyof

  If the velocity versus time graph of an obhba5m/ i+ 4od5j/xr4ti/ xot kject is a horizontal line, the object isx5 5 id/motioak4/h +rtxj/b4

  If the velocity versus time graph of vu2 nwb2d6a1recxm 35 an object is a straight line making an angle of 30 degrees xuvr3a51b2dne62 m cwwith the time axis, the object is

  An object moves 15.0 m nort.qymw-0c15-zjw otn j h and then 11.0 m south. Find both the distance traveled and the magnitude of the displacement qt c -wz0-onwm51j.jy vector.

  A boat can move at 30 km/h in still water.wo teao. ,.1vjcr2h-rnvr/x-p1,qjm How long will it take to move 12 km upstr ejhp,xmq2 a 1 r,.cvno.w--/1j rvtoream in a river flowing 6.0 km/h?

  55 mi/h is how many m/s? (bw e mq*zcyj r61*kg0mx:l 5m81 mi = 1609 m)

  What must be your average speed in order to travel 350 km in 5zv1 +7pz iq48biy y j;*olfyx/.15 h?

  A runner ran the marathon (approximately 42.0 km) in 2 hours and 51) h/uw5 + k8ywcgjib)g*rj pc7 min. What is the average speej5 hu*c)p +b1g/8rigw yjkw)c d of the runner in m/s?

  A car travels 90 km/h. How long does it take for it to t//ckqnw tqm0n0s ;k :nravel 400 km?

  A ly (light year) is the d -amxa h-eh/4ristance that light travels in one year. The speed of lihmha-er/a- 4x ght 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 for 4g9q dw2 xrov +l/or7,j.0 s, ho7jl,2q vow/go9x rrd +w far do you travel during this inattentive period?

  If you run a complete loop aro: hk uvj:7h189jkf 6bmqspk2ibgo k( 5und an outdoor track (400 m), in 100 s, your average velocity qfv kkm 5o8::i2 sujbk19(jhp7k6hg b is

  A polar bear starts at the North Pole. It travels 1.0 km south, then 1.0 k2ezpfdp,gt z7*1nn /wm 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 p 1*df gew2n/pzz,tn7average speed?

  A polar bear starts at the North Pomw*cl qk.x))mle. It travels 1.0 km south, then 1.0 km east, then 1m) w)l .k*mqxc.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 velocity?

  You are driving home on a weekend from school at 55 mi/h for 110 miles. ws +fol.x pw,jx;rg( * It then starts to snow and you slow to 35 ,pw wf*xro;gjxl. s+(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 g0bx)(9ovdk cis the average speed of the motorist for this tok(bx 0dvcg9 )rip?

  A motorist travels for 3.0 h at 80 km/h and 2.0 h at 10hz)6 j5*1 b0jp3;uqn6troru5isjk j a0 km/h. What is her average speed3 ;ras6jhju j 6*jz5n5 k)b0t1iuqp or for the trip?

  An airplane travels at 300 mi/xa g;bpy :fa-t/e5g (j 8h4 kxkxi+o,uh south for 2.00 h and then at 250 mi/h north for 750 miy,xp /5ae tgohkkf8(gxj:4uib-a+ ;xles. What is the average speed for the trip?

  In a 400-m relay race thbtu-b i )f1 ntq4cp)lxv .sj-6e anchorman (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 10.1ij l-t xvn-t)cf6 1 b)squ4bp. 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 ad j*w-m 5ns7vxkgy pm9x a)4)j stop after 14 s. The car's average velocd a*xm7s5)y j np)gwvk9m-4xjity during deceleration was 79 km/h. What was the car's deceleration while slowing down?

  An airplane increases its speed from 100 m/s to 160 sr wm x(8po2(cm/s, at the average rate of 2rx( 8mo cpws($15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 kmj(edu j ia3a4ac+brbq15 -,qo/h accelerates 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 aikoa*;p* )nux nd 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/s for 10 s. It then speeds up with a constant acc81)yz/ 7d wzrrqv:vcn eleration :vq 7yrvc/z) 8r dw1nzof $2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial velocity of 6.3 m/s expgtf5in 8h.vzn3ty *;dw pp0ancc+a37eriences a constant acceleration of 3gfcw +tyn7z * cp8i;atn.dnvp03h5a$4.9 \; m/s^2$. What is the cart's displacement during the first 4.4 s of its motion?

  A bullet moving horizontally to the right (+x direction) 7oz-06ys ogjpym y 39f-qxh4jwith a speed of 340 m/s stri6s0h-m - x34gyfy7jpy oj9oqzkes a sandbag and penetrates a distance of 20.80 cm. What is the average acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is launched from a catapult on an aircraf u b0thvc53zbbv -*-ppt carrier. It reaches a speed of 42 m/s at the end of the catapult, and this requires 2.0 s. Assuming the acceleration i0 pvt u*pcb35z-bvbh-s constant, what is the length of the catapult?

  A car starting from rest moves with constant acceleration ofju6)* 3zu vq1 jtzvu0ygt* o:i $2.0 \; m/s^2$ 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 is its average ah mm;h -v9qie8ccelerat-8mh; ehiqv m9ion?

  An object starts from rest and undergoes uniform ad+qm2t yu. aywj-:2nosq )*pacceleration. During the first second it travels 5.0 m. How far will it travel+oaq):ymd.-a2qst *ynu j 2wp during the third second?

  An object is moving in a straight line with constant accele dy3/ +ppsv5mwration. Initially it is traveling at 16 m/s. Three seconds later iw/3vpmyspd+ 5 t is traveling at 10 m/s. How far does it move during this time?

  A car starts from rest and accelerates uniformly atsep30kv-re 2v $3.0 \; m/s^2$. 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 0z tdxizv7f70em4-ru 2 oj pfqp0,9mt 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 car that has beenw,yv*cc:1c48 s/szkpxa6 ks u waiting at the intersection starts ahead with a constant acceleratc 8 4 v6zsu/kc1px:ycss,ak w*ion 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 11t-;hg htv43zbi,quk2 m/s on the surface of planet X where the acceleration due to gravity isig 31v k uhhb-tq;zt4, $1.5 \; m/s^2$. What is the maximum height reached by the object?

  An object is thrown upward with a speed of 12 m/s on the su0msz o3yt7yp :,b2w ylrface of planet X where the zt s:03 byopm 7y2lyw,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 pqvl rbrtss-;aeq5 *z+jm ,2j/lanet X where the acceleration a qlbrr2jm*q ;s+e5/vz ,jst-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 oi,ice dd;o72;sa9okd xgr:x :f 14 m/s on the surface of planet X where the acceleration due to gravity ,ad7d; i e: ;:gkio2x sxdcro9is $3.5 \; m/s^2$. What is the speed of the object after 8.0 s?

  Human reaction time is usually greater than 0.10 s. If ,/nm)rx 8fk3bii24k ceul 7yd your friend holds a ruler between your fingers and releases it without warnk)4kb7ur f,/ mn2y83eicxi dling, how far can you expect the ruler to fall before you catch it?

  A ball is thrown upward at a velodzpxa,kytl 5t4/y xt7gp60 o.city of 19.6 m/s. What is its velocity after 3.0,0tg py6a4l dkytoxt/.x pz750 s?

  A bullet shot straight up returns to its starting point in 8 /rmwc4ax*m 5hvye(0;r:b muls. What is the initia0v(m*;ha 4:y/c meubl 5xwrm rl speed of the bullet?

  A ball is thrown straight up with aj+)-mjx; txdz speed of 36.0 m/s. How long does it take to)jjtz mx-d;x+ return to its starting point?

  A ball is thrown downwarmcnukk8 / ycx5l1 anvap3+7w88ovj9nd from the top of a building with an initial speed of 18 m/s. It strikes t 8n v9nxmuvlnpcc5k w k/j+83871oayahe ground after 3.3 s. How high is the building?

  A ball is thrown straight up with a speed of 30 m/s. (only fill in numerical ve5m6,y hlsy iyp4ik *7alue in the blanks)4*y6hp7ikey li y5,ms
(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 o8mt+2t+nlw :4s jkq9r cnrha 8f 49.3 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 7 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 7.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what is the velocity at 7e k/wjcsp- ffa/cev5x.l u/9:j lo 1kt = 1.0 s?

  In Fig. below, what is the veloci7gz+n3 e*o )gb oor:mzty at t = 2.5 s?

  In Fig. below, what is the velocity k ka+:jm*th g 4;bgd6uat t = 4.0 s?

  In Fig. below, what is the velocity at t = 5.rx9p mdcz9x,n 4j87g+fw5k oe5 s?

  In Fig. below, what is the average velocity from 0 to 4.0 se+f wb5fu+3 kcqzw1+ t?

  In Fig. below, what is the average velocity from 02hli45(vb dq v to 6.0 s?

  In Fig. below, what is the acce:g* p +zomkdb:leration at 1.0 s?

  In Fig. below, what is the acceleration :ya nm4j2q.egat 3.0 s?

  In Fig. below, what is the avei.9a6fgu* t dy79h-xb qp -awbrage acceleration from 0 to 5.0 s?

  In Fig. below, what is the average ae9gn ,5 x93tkhshugq153 kk nncceleration from 0 to 8.0 s?

  In Fig. below, what is th8 n kt3+k hpg3scuy/aa+ nm07ne displacement from 0 to 8.0 s?

Does a car speedometer measure sw3 nt3upro 04u avhj 1uq84ip2peed, velocity? {speed|velocity}

  An object can have a varyinu5 5iz0j )sngv0mcc(q6v *xapg speed if its velocity is constant.

  The velocity of an object can be negative wh gr (vjw(5 gfayr :r;7 xw7u:xq3vv8ozen its acceleration is positive.

  If one object has a greater speed than a second object, thv;j /j )/ p5vtediqys(e first must have a greaq/vestd;iy5pj ( v)/ jter acceleration.

  Two cars emerge side by side from a tunnel. Car A7ipw9rwd*6l:ncu)a c2 mqf2 s 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 sp pt8)ee5 :ofp+;dcsk oeed as its acceleration decreases.

  A baseball player hits a foul ball straight up into t-,iw+v 76/ ehumfkzqk he air. It leaves the bat with a speed -/u6wke,k hm ivq+ fz7of $120 \; km/h$. 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 t khya/6ew r,-s(spmwli 8l 1w5o its acceleration, how does iti-w /e(m8 ss6,waryl1hw k lp5 change if air friction is ignored?

  As a freely falling object speeds up, what is happeninblau tkp-n.6/g to its acceleration, how does it change if -ut.n/a pl 6bkair friction CAN NOT be ignored?

  An object that is thrown +q c/ kk)9bp62:egoujhuabb-m(dta4 vertically upward will return to its original position with the same speed as it had initi 4o +)pgc (db6u -ma2u/hke9b :kbatqjally if air resistance is negligible. If air resistance is appreciable, how will this result be altered?

  An object can have zero vello*r jq;ka8mn - dt57nocity and nonzero acceleration at the same time.

  An object can have nonzero velocity and zero acceleration at th t(mq0jc6 fd.we same time.

  An elevator moving from the s k 6jobyoraa; -fg g ood(,(3+cy.hc+pecond floor to the fifth floor making no stops along the way has zero acceleration acr(6od+;cgga,kyp oo +a. ( -yboh3jfll the time.

  A rolling ball moves from uk8or2y ouei 1edwodyn 9o1t+1 7*rp+$x_1=2.8 \mathrm{~cm}$ to $x_2=-6.4 \mathrm{~cm}$ during the time from $t_1=1.7 \mathrm{~s}$ 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 $t_1=-2.9 \mathrm{~s}$ is at $x_1=2.7 \mathrm{~cm}$ and at $t_2=3.1 \mathrm{~s}$ is at $x_2=7.8 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete laps around a quarter-mc(vhc d +lfa b/e:dz*:2mxkff*:erp9 ile ($1 \; mile = 1609 \; m$) track in a total time of 11.5 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 91 m m,0e l0*:jw ak.s lvtxaway in 13.2 s. It then turns abruptly and gallops halfway back in 4.5 s. Calculate (a) its averag*jt e. 0lwm:av xlk0s,e 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 froqx b rlodsoy*-a *4l.6m $13 \; m/s$ to $24 \; m/s$ in 5.8 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,.r phcb/sfm2y4w;j y/w(ngc ;ovdc 1 $23 \; m/s$ to rest in a distance of 60 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reach a spem8u pf62 dxzo /r amd9rr;g+;fed of $26 \; m/s$ 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 can bhx3i74vp 5 6 za0dka ye9q t,oelt;s-xurst out of the blocks to essentially top speed abou-le3a x;otaqxe,ys5k9d6 p 7v4 0tziht $11.2 \; m/s$ 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 uniy;u-o3wgl g;yformly from a speed of $16 \; m/s$ to rest in 5.02 s. How far did it travel in that time?  (数值)  $m$

  In coming to a stop, a car mk)gj ,xlashke8 g9 8lc 4ar q-(teu:+leaves skid marks 92 m long on the highway. Assuming a deceleration of 4ug q9cx:eg)alsk kj a rem 8t(-,8lh+$7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a tr8wi)e lzn -zwg:i2 be.,tkd1f uck 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. Az3 w)6jnr *cglfter exactly 27.0 mic njzlw6)3r*g n, there 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?    $s$