Suppose that an object travels frp:e.0( nqxdg1lyog td5 , jy*gom one point in space to another. Make a comparison between the displacement and the distance 5py.,o:(y1tj* qgengldd 0 x gtraveled.

  When is the average velocity of an object equal to the insxj;p4dan osza4uq y+ 7-. mbucd-8lj5 tantaneous velocity?

  A new car manufacturer advertises that their car can go "from zero tu(;rf y9u a39fw2z wnvo sixty in 8 s". This is a descriprf39 u9av n;wz( 2wfyution of

  An object moving in the +x axis experiencjt+gk5 5emu 1ses an acceleration of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to the East (+x direction) begins t+*x,(bzk+ ,5i-o wck qybkos (se mmb60sop e*o slow down as it approaches a traffic light. Make a statemen z o6bekkk-i*w5*, obm(+eo0 +my s csx(qsb,pt concerning its acceleration.

  Suppose that a car traveling to the West (-x direction) begins to slo3ovl;:cxz4r8db q 2sfw down as it approaches a traffic light. Make a statement concerning its acceleratfrx8 dco3;2 l zvb4:qsion.

  Suppose that an object is *8 w- by 2rg5,sofq/gtifnsoby8*3 vh moving with a constant velocity. Make a statement concerning its acceleration8o3 sb *s,8yggh/t2vfnfr iy5-w bqo* .

  If the velocity of an object is zero, doehv+1az sh/vt8- g 5hyws it mean that the acceleration is zero? Support your answer with an example. haygsh tz+v58/-v1hw

  Can an object's velocity change direction whepzqk3 s*0yjhz6em+l;o( ka n-n its acceleration is constant? Support your answer with an exam6lkjm+0 ;* -zsohp ye3(zkn qaple.

  Suppose that an object isqa, vo-k/h n,n moving with constant acceleration. Make a statement concerning its motioko,h -v/na,qn n with respect to time.

  Can an object have increasing speed while its acceleration is decreasing? Smpc8 rjt4xsl,1bv64 o upport your answer with an example.p1b m,vorj 4684cxtl s

  Suppose a can, after an initial kick, moves up along a smooth hill of izv wk o7(mmr3r1q2 uc wxo0m7*ce. Make a statement cor0wr o* xm72vc7wq(uzmkm 1 3oncerning its acceleration.

  Under what condition is a.1 n2 fjxsgazr1 gt5d*verage velocity equal to the average of the object's initial and final velfj51r ntdgs1zxg*a .2ocity?

  Objects A and B both start at rest. They both ac n,+qc5na; suscelerate at the same rate. However, object A accelerates for twasn,s nqu;+5c ice 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 6wh(ji(3vvg s7 t ,ehvboth accelerate at the same rate. However, object A accelerates for twice the time as object B. What is the distance traveled by obj6gjvetv7vhw hs (i 3,(ect A compared to that of object B?

  When an object is released froj (i qzuc+tjy/*-i.u /udl; hhm rest and falls in the absence of friction, which of the following is true conq+/uzuj/iuh;yjt i( -* d .chlcerning its motion?

  When an object is released from rest and falls in the absenc1pokfwtzzf,zcruro3-d 5r ;6(,adv4 e of friction, which of the following is true concerning its motion?6,43zzc1-z; (,u r5prowa tfdkfdv r o

  Suppose a ball is thrown straight up. Make a statement*r /0z4:u;afic 7rcl y9 l ;hrwlguyj. about the velocity and the acceleration when the ball reaches the lzauc. ;yc9rfr0/wlgl ;:h uyijr 74*highest point.

  Suppose a ball is thrown straight up. What is its acceleratih5:y w1vavof6f 4(*v+ c,v0snij oh gaon just before it reaches its highest point4awcvvvi(6s a1 o:n*g 0hv+5fyjf,oh?

  Suppose a ball is thrown straig5; za8-l5fwod cnhe+yht 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 goi5elycd f5h ow+;-a8z nng up.

  A ball is thrown straight up, reaches a mnib6rfx/bg 55,,ezo maximum height, then falls to its initial height. Make a statement about the directix, 5berofi g6n 5zm,/bon of the velocity and acceleration as the ball is coming down.

  Suppose a ball is thrown downward in the absence of air resistance. Make tkt45(a fnp8 aa statement concerning its acceleration4p5 8fnk( ttaa.

  Suppose a skydiver jumps from34asg,4kvi k k a high-flying plane. What is her acceleration when she she reaches ig,4sv3 kakk4terminal velocity?

  A ball is thrown vertically upwardge2iwoj j3h77 with 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 3 ejwi7 j7hg2oto 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 r) z2qg0.5 fkfb)nragtv3uh0dropped from the sr q050zvn )ubg32tg.f)akhr fame building. As time progresses, the distance between them

  Ball A is dropped from the top /eqx;ma+so5 jof a building. One second later, ball B is dropped from the same building. As time progresses, the difference in their speedm;+osx/5qeaj s

  Two objects are thrown from the top of a tall building.nso,rl g+/l*fh::ur e One is thrown up, and the other is thrown down, both with the l:e us/lfgrh *,ro+ :nsame initial speed. What are their speeds when they hit the street?

  A brick is dropped from the top of a building. A second brick is thrownr a5h9 hl5yc-n straight down from the same building. They are released at the same time. Neglect air resistance. Compare the accelerations a9-5nl5 hhrcyof the two bricks.

  An object is moving with constant non-zero d;w yfeza2d0q ;-hr 5.fu :ctlvelocity in the +x axis. The position vwe . hduz5:-l 2 ;qcar0ft;dfyersus time graph of this object is

  An object is moving with constant non-zero acceleration in th19dznsfhdfc*a pb)8 rxt9 v3/ e +x axis. The positrf9h9 18d/ p sfbxtdn*3vcaz )ion versus time graph of this object is

  An object is moving with constant n:qyo ,89 pwcyeon-zero velocity in the +x axis. The velocity versus time graph of this object iwq8o 9ey:p cy,s

  An object is moving with conp(fd lq6z7 ue7stant non-zero acceleration in the +x axis. The velocity versus time graph of this objectq 6 7e(lpudfz7 is

  The slope of a positlo6 w7spxe.1eion versus time graph gives

  The slope of a velocity versus time graph(n9m/ fn ..k0tilfkwc gives

  The area under a curve in an acceleratu i v,micv.;v0ion versus time graph gives

  The area under a curve in a velo u tz6e2l.p5pccity versus time graph gives

  If the position versus time graphzm zr l*s*u ah;x82 2zlfis:2w of an object is a horizontal line, the object iss z *w2mizzh:l2lr;2u8xs*a f

  If the position versus time graph of an object is a vertical line, thdrf5taxcut3 uch/n2d cbk (gi7 ;n0;8e object is;d(tngak n/buc2uic 0t x;f7ch 5d3r 8

  If the velocity versus time graph of an ob8 scpapda: ,yi657 bhrjeer(e7 .uue 2ject is a horizontal line, the object er,i srda8 p 72.e6ca5u7u:e eh(pbjyis

  If the velocity versus time graph of an object is a straight line ma gnsthx (6 f(p/yutbhi*1bl0;king an angle tx/f p *lt g h0b1y;(6sin(uhbof 30 degrees with the time axis, the object is

  An object moves 15.0 m north and then 11.0 ms bz 7 l5z.fuji(+xi:c south. Find both the distance traveled and the magnitude of the diic s7(lbu+jzx.5z if: splacement vector.

  A boat can move at 30 km/h i wclb(n64(el jn still water. How long will it take to move 12 km upstream in a river flowing 6.0 (lej64bwcnl( km/h?

  55 mi/h is how many m/s? (1 mi =kx )epgg7 :bt2 1609 m)

  What must be your average speed in order to trav +ke+vf ei:tq3el 350 km in 5.15 h?

  A runner ran the marathon (approsg:2 8m ta5rc 1r/nmxxximately 42.0 km) in 2 hours and 57 min. What is the average 1 a2rtmg /xs5cmr: nx8speed of the runner in m/s?

  A car travels 90 km/h. How long does it ta6n k*; zl vej(fm.ez9lke for it to travel 400 km?

  A ly (light year) is the distance that light travels in one year. Thepwa*woz3 *o2tdrjc: 3 speed of ligdprcazo: 3*3 o*wjt2w 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 u0siar);;m/da1hrcj5(ukqs8 h f m.s side for 4.0 s, how far/;(ud. ahmhu f5q01s mcasrkj8s;) ir do you travel during this inattentive period?

  If you run a complete loop around an outdoor track (400 m), in 100 :.p:n9tnd wd /;eno.:nldym js, your average velocity ;.wn nn j/n e::yt.l:9dmpdo dis

  A polar bear starts ah4sz3dr)z1x97 zrj 6o+puxatd t;y 2ukl*ow0t the North 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 45 min.tu drhzzw ja9dzryo 6;24*t 1k0o)ls+p3xx7 u What was the bear's average speed?

  A polar bear starts at the North Pole. It travels 1x11w hvhlc/ 3ajfy27z n7t,gz.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 45 min. What was the bear's avl/tg af3xzz yh1 17cw7,vh jn2erage velocity?

  You are driving home on a weekend from school at 55 mi/h for 110 miles. 6c.joo o t-zn4c,zg/9(ff zezIt then starts to snow and you slow to 35 mi/h. You arrive home after driving 4 jg.o-e6/z(ozzf4oc 9fntcz ,hours and 15 minutes. How far is your hometown from school?

  A motorist travels 160 kmb2g;7u)ppg+py st*ys at 80 km/h and 160 km at 100 km/h. What is the average speed of thesy7) y+ ggu2b*p;ppts motorist for this trip?

  A motorist travels for 3.0 h at 80 km/h a jj*gj mr)g5ph 384 pq reb)+cntzzh8(nd 2.0 h at 100 km/h. What is her average speed for mj3brc5z)q*+8)rjhp h entgg (84z pj the trip?

  An airplane travels at 300 mi/h sout39j.n.ur k,ipw1ypgbw+gok 6h for 2.00 h and then at 250 mi/h north for 750 milw+9g.1b , 3kwojunpk6ry.gpi es. What is the average speed for the trip?

  In a 400-m relay race the anchormb 7k.4epzzq2*r. b5gwwp4 xq ian (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 10.1 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 q44qg.zkpri*ebw572.x w bpzorder that the team A runner not lose the race?

  A car decelerates uniformly and comes to a stop after 10 s. i1 zn:r1-difw0ml /lwThe car's average velocity duri01dl/-w lfr :1nzimi wng deceleration was 60 km/h. What was the car's deceleration while slowing down?

  An airplane increases its speed from 100 m/s to 160 m/s, at the average rath)luv5z ,su80og : dv5 c;lwjwe of sw),c ldo;0hlu8 5uwg 5:vjzv$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/pvl; 9el dc 1e k42r-fj9i8(olid4mr gh 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 anv;8pr(fp 3bf ed 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 sp :0(i5 druv3mhs kyl)beeds up with a constant acceleration of 30:il(r)dyu5hkm vsb $2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial velocik1mo /kn8*ver ty of 1.6 m/s experiences a constant acceleration of1/m*no 8rkkve $3.4 \; m/s^2$. What is the cart's displacement during the first 7.5 s of its motion?

  A bullet moving horizontally to the right (+x direct0wmdzh l*./lpion) with a speed of 384 m/s strikes a sandbag and penetrat/*0dhp lmwl.zes a distance of 36.51 cm. What is the average acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane w udo.t97 izhjs0 2iw6is launched from a catapult on an aircraft carrier. It reach9h6dsu 0wt w2ji.i7z oes 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 length of the catapult?

  A car starting from rest moves with constantg/ umzn3k+7fjv7lu:dfr + y )v 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. W nq)x,ubl8nr2 o5qdl 5hat is its average acceleratioqqn5dull 8xb 2,)nr5 on?

  An object starts from rest and undergoes uniform acceleration. During the y7 bap.e *b-g2u,j0i6h uelaa first second it travels 8.3 uyaiagh6ae ju7p 0 *l2,-bbe.m. How far will it travel during the third second?

  An object is moving in a straight l .f7qyojb(lm q7l9 e,gine with constant acceleration. Initially it is traveling at 16 m/s. Three seconds later it is traveling at 1 77e,bjmqyqll go(f.90 m/s. How far does it move during this time?

  A car starts from rest and accelerates uniformly 0pck7wzs m,* xat $3.0 \; m/s^2$. 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 vs j26wdafz-* /0 irixa dry road 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 car that has been waiti3abr-4d.d (h.qck l gsng at the intersectionrahb..kdcgq-4 l 3 d(s 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 speedbt ufmekor ).;p4+w/b of 12 m/s on the surface of planet X where the acceleration due to gravr).e4 fobp+t kb;/umw ity is $1.5 \; m/s^2$. What is the maximum height reached by the object?

  An object is thrown upward with kn(-a ( l:pg ba27krnna speed of 12 m/s on the surface of planet X where the acceleration dann l k(-g7kpr: (nba2ue 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 1 6+rn ymctwi8wrfj;ll / f sq2+*9yqlon the surface of planet X where the acceleratiqq mcrfns+ + flwti1j8wll; r9/y26 *yon 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 t bybey(57ijr;8x*t+bg 8j oiphe surface of planet X where the acceleration due to bi bx(ejyopr5+7bi j8gty8*; gravity is $3.5 \; m/s^2$. What is the speed of the object after 8.0 s?

  Human reaction time is usually greater than 0.10 s.t7klmxfd() oz9q8h c)c x kvo )nb3b5, If your friend holds a ruler between your fingers and releases it without warning, howto )of( vzmk3)5lkxbn dx7qb89c )ch, far can you expect the ruler to fall before you catch it?

  A ball is thrown upward f/2bsclai,kf)*gui e8++ h*enh+lo f at a velocity of 19.6 m/s. What is its velocity after 3.00 skoa chl*+gie + 8 f,if2) fb+ln/*hesu?

  A bullet shot straight 4,e :y;x0 b 1hvhh)hd*jrvtmvup returns to its starting point in 16 s. What is the initial speed of rv v)*:xhh0y,be hm tjvd1;h4the bullet?

  A ball is thrown straight up with a spee1eefq -uy.b 0id of 36.0 m/s. How long does it take to ret ye -fi1.ube0qurn to its starting point?

  A ball is thrown downward from the t 7))b5d tx)iyeizd ,usu5asu2 op of a building with an initial speed of 21 m/s. It strikes thesdu)) ) y 7suu,iidbetz5 5a2x ground after 5.7 s. How high is the building?

  A ball is thrown straight up with a speed of 30 p ,mr5rcw q wkhm7j7 lct0;1rz,ezm(;m/s. (only fill in numerical value in the blw cmk,qr m,(jlm;cw5p10z7z r; reth7anks)
(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 straigh1.giya .,vve ib)9vn st up into the air with a speed of 37.9 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 6 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 6.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what cekp gx:+q.wbp +40q .fja/teis the velocity at t = 1.0 s?

  In Fig. below, what is thw b *tnhl,z2tf7dv4*ie velocity at t = 2.5 s?

  In Fig. below, what isay.i3-k1r u*ad i dk0h the velocity at t = 4.0 s?

  In Fig. below, what is th hppydn1 l.j02.ntm *re velocity at t = 5.5 s?

  In Fig. below, what is the average velof tf/uqhkxo83dov h6bz3. +n3city from 0 to 4.0 s?

  In Fig. below, what is the avj q-qp 2uq nlcd5/;p:verage velocity from 0 to 6.0 s?

  In Fig. below, what is the acceler-u3skm;*f6w t9rfu: /ocfwhta wzl62 ation at 1.0 s?

  In Fig. below, what is thc; ) )/+c(cca qni py6 1gb3xxinh)w(5rrcatve acceleration at 3.0 s?

  In Fig. below, what is the average acceleration 7hkalf z817uqk1cjb 3o 6oy z5from 0 to 5.0 s?

  In Fig. below, what is the average acceleration from zigb;s7 uy5 p80 to 8.0 s?

  In Fig. below, what iwkvd 4;fd(sr so*2a8 *z 1fzwef5ct:ws the displacement from 0 to 8.0 s?

Does a car speedometer measure spet h -,1xa8byqyed, velocity? {speed|velocity}

  An object can have a varying speed if its velocity is consyby7hc tp2.v+ tant.

  The velocity of an object can be negative when its acceleration is positfc rq4en :l7klwn 515sive.

  If one object has a greater speed than a second object, the fi)wlf2.dek .xfrst must have a greater accele d)f2.ke lf.wxration.

  Two cars emerge side by sihlxoq; z90q2 ode 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 au4 4n55f5vkqf9x zh vn(( ghlccceleration decreases.

  A baseball player hits a foul ball straight up into the air.n6k kz s7p 7,mzgsy)i; It leaves the bat with a speek,pymkzsis77n 6 z;)gd 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 it3 h v ;.dkgufjg05cno1s acceleration, how does it change iug0o vj.gh3 ;d 5f1kcnf air friction is ignored?

  As a freely falling object speeds up, what is happening to its z,n6h0b7m+ftq9(xt9n mc h ltw/r 7lpacceleration, how does it change if air friction CAN NOT be i cfrz+nt(mtnhl 7x lhb9t/0 pwm 9q67,gnored?

  An object that is thrown vertically upward will retu99frwbh p0orc 1,l+zirn to its original position with the same speed as it had initially if air resistance is negligible. If air resistance is appreciable, how will this result be a f,0r99pb lhor +1wcziltered?

  An object can have zero velocity and nonzero acceleration atrq o/m v/r3k67xnhll, the same time.

  An object can have nonzero llc8tcy9nsb-,sp4 119 zzwdo velocity and zero acceleration at the same time.

  An elevator moving from the sb16 xure(g6ovecond floor to the fifth floor making no stops along the way has zero ac1r vbx6 gu(oe6celeration all the time.

  A rolling ball moves fromh06csc: ft.bj $x_1=2.4 \mathrm{~cm}$ to $x_2=-6.5 \mathrm{~cm}$ during the time from $t_1=1.8 \mathrm{~s}$ to $t_2=5.2 \mathrm{~s}$. What is its average velocity?  (数值)  $cm/s$ (only fill in numerical value please)

  A particle at $t_1=-4.0 \mathrm{~s}$ is at $x_1=2.6 \mathrm{~cm}$ and at $t_2=3.5 \mathrm{~s}$ is at $x_2=7.9 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete laps around a qua7s -t wvjvs/rmta1zm295och;rter-mile ($1 \; mile = 1609 \; m$) track in a total time of 8.9 min. Calculate (a) the average speed  (数值)  $m/s$ and (b) the average velocity    $m/s$

  A horse canters away from ij .1p dlud-+bwmoz*6ul. 5c : iyo,icets trainer in a straight line, moving 103 m away in 10.1 s. It then turns abruptly and gallops halfway back in 4.6 s. Calculate (a) its average speecj1.:6lid mw z-* ild yu5c .+b,poueod  (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 nm:cs ovj;uwx/co/1 sg4;zi5 $12 \; m/s$ to $25 \; m/s$ in 5.2 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 frocsml2guzuo .; 5-0ch.m v2gsem $17 \; m/s$ to rest in a distance of 78 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reakr2/4wh x9 ezt2 ye5pzch a speed of $30 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $2.6 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinter can burst out of the blocks to essentially t4roh,ozwx46z op speed about 6oho ,z4xwz4 r$10.0 \; m/s$ in the first 12.7 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 from a 02 ppe-k ybbi/;z0z7u +q(lw7;hffwfkvhi.l speed of $16 \; m/s$ to rest in 5.69 s. How far did it travel in that time?  (数值)  $m$

  In coming to a stop, a car leave379x x,mtgg-ri fz4n mhruu* 3s skid marks 92 m long on the highway. Assuming a deceleration of3m34hun,rztxi g*u rx - gfm97 $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck g)vn.j j 4lj;kzbn :o:voing $25 \; m/s$ 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..gaxnm,ck+ 2l After exactly 27.0 min, there are still 1100 m to go. Theg2 +lac.xnm k, runner must then accelerate at $0.20 \; m/s^2$ for how many seconds in order to achieve the desired time?    $s$