Suppose that an object travels from one point inbpae 3ma p/(v8 space to another. Make a comparison between the dia/(mp3 e8 bpavsplacement and the distance traveled.

  When is the average velocity of an object equal to the in(.cgels at/r -m2 :vcfstantaneous velocity?

  A new car manufacturer advertises tha6;,2t fq yb /8g2xjrblkmf8a2bp ybp3t their car can go "from zero to sixty in 8 s". This is a des38mjbt/,l gf;kqa 222b6fybppbxry8 cription of

  An object moving in the +x axis exper +kznx hbl :)*hjd9x,yiences an acceleration of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling q ie.**hoev5ko:5h i mto the East (+x direction) begins to slow down as it approaches a traffic light. M.mq 5:ii* 5vooeh kh*eake a statement concerning its acceleration.

  Suppose that a car traveling to the West (-x dire+d*k c *sawbki *kdt15ction) begins to slow down as it approaches a traffic light.bak5 tiwd***s kkc d1+ Make a statement concerning its acceleration.

  Suppose that an object is moving with a constant velocity. 6 y 7j)za3aq cb qh)mp4/wogu(Make a statement concerning its acpwb q643mayoqc7 /(jg uza)) hceleration.

  If the velocity of an object , *7gp:oedgsb is zero, does it mean that the acceleration is zero? ps7eg*: dgb o,Support your answer with an example.

  Can an object's velocity change direcm qoz50gcb3 9ftion when its acceleration is constant? Supm 93qgbo 5z0fcport your answer with an example.

  Suppose that an object is movinm ouqp;n,695j q+vezpg with constant acceleration. Make a statement concerning its motion with respectv ;5q9,p upo zqj+ne6m to time.

  Can an object have increasing speed while its acceleration is dec72l54o xrtljk reasing? Support your answer with an ex o7rlx5tlj 4k2ample.

  Suppose a can, after an initial kick, mo/w6y 4n- tsu++r2qsgk7 wdymt ves up along a smooth hill of ice. Make a statement concerning its acceleration 7tqkw6ts2u+wsr+mdg /-y4 yn.

  Under what condition is average va9daf:8h9r32nzmc4 gp g .f fjelocity equal to the average of the object's initzma :2n9 far.43 8gfpcg h9djfial and final velocity?

  Objects A and B both start at rest. They both accelerate atqw74s 9+ c+f/hhnevmy the same rate. However, object Ayh+hesqw+ /49 c7fvn m accelerates for 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 4n.6hqhdgb /lne3 ;kn same rate. Hd/3n h ghn.ek6qb nl;4owever, object A accelerates for twice the time as object B. What is the distance traveled by object A compared to that of object B?

  When an object is released from rest and falls in ad /.cjlz5zo+the absence of friction, which of the following is true c zj/dzoc a.5l+oncerning its motion?

  When an object is released from rest and falls in s 4 :rsde*zzl0the absence of friction, which of the following is true concerning its re04s dlz*zs: motion?

  Suppose a ball is thrown straight up. Make a statement about 7da.txpt 1xw 1the velocity and the acceleration wd1 7wt.x tpx1ahen the ball reaches the highest point.

  Suppose a ball is thrown straight up. What is its accelerakgfah +e 26x,ltion just before it reaches it ,hkg6a 2ef+lxs highest point?

  Suppose a ball is thrown straight up, reaches a maximum heigcuk+6 8gwl7xdzx)wk* ht, then falls to its initial height. Mak8z7 6lkwx+dwuk*gxc )e a statement about the direction of the velocity and acceleration as the ball is going up.

  A ball is thrown straight i k,7yh mtc(h7up, reaches a maximum height, then falls to its initial height. Makek 7i,h7(ctyh m a statement about the direction of the velocity and acceleration as the ball is coming down.

  Suppose a ball is thrown downward in the absencz,w-f jax *de*e of air resistance. Make a statement concernin,**wdfjxe za -g its acceleration.

  Suppose a skydiver jumps from a high-flying plam r62h)jdf o u5ibe*j-zi(k)sne. What is her acceleration when she she iibh 6f*jo()ez dsm )uk52j-r reaches terminal velocity?

  A ball is thrown vertically upward with +v)sttjnr/ic5 7pp( c 9zlt)za 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 to that of the first ball? (How mantz9 r7/pnjvstzt+c( )pl) i5cy times higher does the second ball go than the first ball?)

  Ball A is dropped from the tsgiiful23k8 +qxw lst,:ujq 9 ap50h: x:f.eb op of a building. One second later, ball B is dropped from the same building. As time progresses, the 8g xx:q jeht qp+.l2blu,ff :0s39:5kiwua isdistance between them

  Ball A is dropped from the top of a building. One second later, ball B k: 2jgh7))yr x:wbmctb tq 3a(is dropped from the same building. As time prog c7(:w 2rg3tk)m a):qj bbhxtyresses, the difference in their speeds

  Two objects are thrown from the top of a tall builjjho, m9o6) (fr/hqo sding. One is thrown up, and the other is thrown do6smf,o)j9ho q h(orj/wn, both with the same initial speed. What are their speeds when they hit the street?

  A brick is dropped from the top of a building.5zwbnz4 se;v . A second brick is thrown straight down from the same building. They are released at the same time. Neglect air resistance. Compare then. zs5ve;4 zwb accelerations of the two bricks.

  An object is moving with constant non-zero velocity in the +x axis. Theyrwxsj, wnv,2 fewwzk aw2(889r 97f i position versus jwwz 7i,9f(,x92 a8v 8yswwern r wfk2time graph of this object is

  An object is moving wk +uqp46y /f i9wsi xhioww2o. d+zfe, 7.oz1vith constant non-zero acceleration in the +x axis. The positioo+zdf o96wov.p 27k,w1uiqwziy4ix h . e fs/+n versus time graph of this object is

  An object is moving with constant non-zero ve3dtphx1c * p:wc wpn(.locity in the +x axis. The velocity versu*1hcp wtc 3.:wdp xp(ns time graph of this object is

  An object is moving with constant non-zero acceleration in theo;lwia7 yo9 z7 +x axis. The velo o7z;alowyi 97city versus time graph of this object is

  The slope of a position versus time graph gij uq7rxg,ru q- lib:)r;g(1cr ves

  The slope of a velocity ve(8r6g gmjhc/x rsus time graph gives

  The area under a curve in an acs,lal (jy4ilp9r,)3ksn tc(ua4+b r:c1 uhzeceleration versus time graph gives

  The area under a curve in a velocity versus time graph givesu tlp03o(t +wh

  If the position versus time graph of an object is a horizontal li :dukat/.(m ;kq 7t wmlc8gyh,ne, the object tk7 (u thcymkm ,8;d /q:agw.lis

  If the position versus time graph of an object is a vertichtx23)nm+lgu:a6on(2u 5 mxhqmsg c tr9;fi0al line, the object ism ;rq25c+mtahm6o( f)9hl x: gitus3nug nx20

  If the velocity versus time graph of an object is a horizontal line, the ;bqhja:7 sd1 nobject ;7d:bajhnsq 1 is

  If the velocity versus time graph of an object is a straight line making an :w .q;,c p-wsi9drokg angle of 30 degrees with the ;kciq-w rwd, .:sg9potime axis, the object is

  An object moves 15.0 m north and then 11.0 m south. Find both the distanceahxln gwzz u6: +r/ws;n/+nf9 traveled and the magnitude of the dinzh9;f6n+/gwz:/ ul+wa r n xssplacement vector.

  A boat can move at 30 km/h in still water. How long will it take -fik ,w wcdydy2+bs8 6to move 12 km upstream in a river flyi8dws ,2d cy-+wkf6bowing 6.0 km/h?

  55 mi/h is how many m/s? (1 mi = 1:m0a wh v.eemu i(6qnktl b3)/609 m)

  What must be your average speed in order to av--wu5z4 xf(up3,fkt z 1m ottravel 350 km in 5.15 h?

  A runner ran the marathon yk /roi9z97wh(approximately 42.0 km) in 2 hours and 57 min. What is the averagoyw/ 9 9hrkiz7e speed of the runner in m/s?

  A car travels 90 km/h. How *nhz81 fb9ucmlong does it take for it to travel 400 km?

  A ly (light year) is the distance that light travels in (k )gwu1 xekoyj7 q)n30ry6vo one year. The speed of light wujvg()x3 oyq6)kn1kr 0yo7e 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 4g9t1 l yuns1vthe side for 4.0 s, how far do you travel during this igyt4n9 s1 1vulnattentive period?

  If you run a complete loop around an outdoor track (400 m), in 100 s, your averak5nyn4iu 2/pdcu .0lozi/q;u 45iqpn;0i/oklz/un .c2dy uuge velocity is

  A polar bear starts at the North Pole. It sf i-2 0opz(nu3v0)8mknjxvzu5 1osl travels 1.0 km south, then 1.0 km east, then 1.0 0o5123 izknn m( xvs8spfuj-lo)0 zuv km north, then 1.0 km west to return 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 km south,b6f9bdutz0m) fv q :d6 then 1.0 km east, then 1.0 km0d 9 b6f:z dqvmt6)fub 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. It thed(ptd t:mqfsgc* fl/6;3(a+mt9 7i pxbjza k6n starts to snow and you slow to 35 mi/h. You arrive home after driving 4 hours and 15 minupg(tz djaltmaipq:6+d *ffs36ckm 7 xbt/(; 9tes. How far is your hometown from school?

  A motorist travels 160 km0h az496. tna zvqvg.y at 80 km/h and 160 km at 100 km/h. What is the average speed of the motorist for this trit. .9gv nayh4qv a6z0zp?

  A motorist travels for 3.0 h at 80 km/h and 2.0 h at 100 kmp+-dtc7z j(e ls2 8c r7bzvw3m/h. What is her average spe2tpzmj svccedb 7r8 -l7w+(3 zed for the trip?

  An airplane travels at 300 mi/h southr ,ry3;fwsl 1x:xw+ioe j8i.m ug*6pw for 2.00 h and then at 250 mi/h north for 750 miles. What iss*xrl rju+63i.pw1y o ; ewi w:mxg8,f the average speed for the trip?

  In a 400-m relay race tto t ob.z1xw9r1vzz;f4k 3 ja0he anchorman (the person who runs the last 100 m) for team A can run 100 m in 9.8 s. His rival, th9w4oz0;3b.o1 rvz kf axztjt1e 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 uniformt 1fukpvr4vdq21 2e+3m;xb(il25z fv3 nqcsw ly and comes to a stop after 13 s. The car's average velocity during deceleration was 57 km/h. What was the cwqsvlmi2x f2b(5n z dp2ce+431ku3q vtfvr;1ar's deceleration while slowing down?

  An airplane increases:nc/ph*g*i r z its speed from 100 m/s to 160 m/s, at the average rate of n rgh*p/ic: *z$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h accelerates atu;3 6/ wjiwlm9m83hk x5r yzor3wzwu . 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 accee7-vdng wb/a(a(x9 wy lerates 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. Itsdvp,,7)ypv cl4 on x)kj*yk: then speeds up with a constant acceleration of nd,kppvcy)sxy47k)o: l*v ,j$2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial veloci .:t/h+a4 o: kyxc,6;awp dam4oegch gty of 3.3 m/s experiences a constant acceleration ofh 6ga:ac4.oy4 cgt/ o x;em: ,kph+adw $2.5 \; m/s^2$. What is the cart's displacement during the first 8.1 s of its motion?

  A bullet moving horizontally to the right (+x direction) with a speed of 5(h2gy0cp8rg o30 m/s strikes a s(80c2ry ho ggpandbag and penetrates a distance of 57.65 cm. What is the average acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is launched from a catapultmspu*e6+ol3 ok4k8 uzmd;mvpu24n, l on an aircraft carrier. 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 length of the catapunp6dzol m * klumm43u ,2vo8pe4+ku; slt?

  A car starting from rest moves with constant acceleration os:3asbdlbd* ))bl-l7bgb9ul f $2.0 \; m/s^2$ 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 distancy,t8 r) -jcjnpe of 200 m. What is its average accpt yn- ),8jcrjeleration?

  An object starts from rest and undergobi5:3bg wo(hik k g2k*es uniform acceleration. During the first second it travels 1.2 m. How fa i3gbk(:khiwk2 bgo5*r will it travel during the third second?

  An object is moving in a straight line witdv;hsq8 1o7j 3dwnwb-h 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 t dobh;87 w3-j1vd qwsnime?

  A car starts from rest and z/kw1 h8edq 1k1 **rpuirw. mmaccelerates 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 tires6rh /s5g 9 e.rwq8s ulc8ndcx7 on a 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 lighpp(2ary*o7g f at s8a.t turns green, a car that has been waiting at the intersection starts ahead with a constant 82pyg.a(t7s oapar* f 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 surfa3eyd+v k415q;3n4lukxbioo 9l kld *ece of planet X where the acceleration +3kon 154le3 vdl*l4qd xy obk9;ieu kdue to gravity is $1.5 \; m/s^2$. What is the maximum height reached by the object?

  An object is thrown upw,f0 eh (httoz)ard with a speed of 12 m/s on the surface of planet X where the acceleration due to gr0e ),ohhf(tztavity 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 pla4c01qs7rm xufa8.n lsnet X where the acceleration due to gsu10q a4lc7.8xrsmnf ravity 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 then ok-hed26e kyv+v18o surface of planet X where the acceleration due to gravity6d8kk- +ve2voynheo1 is $3.5 \; m/s^2$. What is the speed of the object after 8.0 s?

  Human reaction time is usua1ao-dvt tl(sdl:-kfxip5z,:a a ysr7xnu +)9 lly greater than 0.10 s. If your friend holds a ruler between your fingers and rez9a-pl stu +1)l t:(75xof dvsky-:,rdi na axleases it without warning, how far can you expect the ruler to fall before you catch it?

  A ball is thrown upward at a velocipdmi.5 3vt*x-8 7i/0cc7f tu(xtvfdgk9nbqpty of 19.6 m/s. What is its velocity after 3.q757c 9 t f dtkng3-ipcf/8xvupx(* idbtv.m000 s?

  A bullet shot straight up returns to its starting point in 13 s. Whas612uzugmoidf uh)8 9t is the initial68os h2fiuz1u9)mudg speed of the bullet?

  A ball is thrown straight up with a speed of 36.0 m/s. Howyex h.a7q(o v00o )ns*to7ljp long does it take to retur)l0a 0v*nxy7pse 7 (ohq.jtoon to its starting point?

  A ball is thrown downward fro p v9gqb1up.h-m the top of a building with an initial speed of 6 m/s. It strikes the ground after 5.5 s. How high is the buiuph qvb-g. 19plding?

  A ball is thrown straight up with a speed of 30 m/s. (onlnfc5x6ns2/ycz6dxlo if 78;uy fill in numerical value in the blanks62 fylf xn 5u;8/6znsid7oxcc)
(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 m*m2s7du.wo .zbjxe( ; qlm7kmay; 9b into the air with a speed of 32.9 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 1 seconds later.  (数值)  $m/s$
(e.) Determine the time at which the ball pass a point 12 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 12.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what is the velocity at t = 15t 6 hg 9bbq6sz,jfru*.0 s?

  In Fig. below, what is the velocity at t = 2.5 dam :njtmps;p0 uc 15-s?

  In Fig. below, what is the velocity at t = e+ )h jo11u wz5 bljc1c0)nndu4.0 s?

  In Fig. below, what is the velocity at t = 5.ou/,mwy6hl1aj 9 s6yx5 s?

  In Fig. below, what is the average velocity from 0 tv/s; ad rjmkj/odf++3zb8 xd)o 4.0 s?

  In Fig. below, what is the axp k.cn9:f *vp) ,rxoaverage velocity from 0 to 6.0 s?

  In Fig. below, what is the acceleration at (1fpl2 (gkwk0be ks*e1xsti+ 1.0 s?

  In Fig. below, what is the acceleration at 3.0 sa ax jn1w-t0(y?

  In Fig. below, what is the average acceleration from 0 to 5.0 t( m)kx1912 sl77lbuzr zleyu s?

  In Fig. below, what is the average acsmak 3wprg q/.;)i s1yceleration from 0 to 8.0 s?

  In Fig. below, what is th popa2r8av*z; e displacement from 0 to 8.0 s?

Does a car speedometer measnrqpsk)qx0 oqvzi/.j+- 1y3jure speed, velocity? {speed|velocity}

  An object can have a varying speed if its velocitylg q/yvg m0q86 is constant.

  The velocity of an object can be negative when its acceleration iabi 9mzmd 3f5z 90i+fws positive.

  If one object has a greater n*+;j kojt8x6a,j gyhspeed than a second object, the first must have a greater accelerh,8j*y6 a+ t;x jjkongation.

  Two cars emerge side by side from a t1tu6ob u 8xk(yunnel. 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 spe e cner /bmli.fhe9).8ed as its acceleration decreases.

  A baseball player hits a foul ball straight up into the air. It lo 9t en:hejb).eaves the bat with ajhb .n ee9t)o: speed 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, wha m)(,olgc yro5t is happening to its acceleration, how does it change if air frictiomc5 (go,l yo)rn is ignored?

  As a freely falling object l vp6zay4up +7,wev0 mspeeds up, what is happening to its acceleration, how does it change if air friction CAN NOT bel7y6awpe u04vm,zvp+ ignored?

  An object that is thrown vertically upward will return t 6a7xmp*aos-0lto a5r7mri ry n7(ck +o its original position with the same speed as it had initially if air resistance is negligible. If aip7 o7xas(*-mlyacm r0r57no a6 itk+rr resistance is appreciable, how will this result be altered?

  An object can have zero velocity0rs h2v3g 6ytre )r5fp and nonzero acceleration at the same time.

  An object can have nonze+ w6ok gw/xli75a lkx1ro velocity and zero acceleration at the same time.

  An elevator moving from the second floor to the1i *)fo6f9e+opbkguwph+ z7 k1 nuk;g fifth floor making no stops along the way has zero acceleration alb 7woh k1f)uz1k;f6++i np*g9 ep ugokl the time.

  A rolling ball moves frg-y8ul6jft1( /jzq srom $x_1=3.4 \mathrm{~cm}$ to $x_2=-7.4 \mathrm{~cm}$ during the time from $t_1=0.8 \mathrm{~s}$ 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 $t_1=-3.1 \mathrm{~s}$ is at $x_1=2.3 \mathrm{~cm}$ and at $t_2=3.9 \mathrm{~s}$ is at $x_2=8.4 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete laps around apkp0d 9k1k zk, quarter-mile ($1 \; mile = 1609 \; m$) track in a total time of 9.9 min. Calculate (a) the average speed  (数值)  $m/s$ and (b) the average velocity    $m/s$

  A horse canters away from its train(1f01 yptw 18bbeaudmer in a straight line, moving 109 m away in 12.9 s. It then turns abruptly and gallops halfway back in 4.6 s. Calculate (a) its dbu w1ymb11ftp 0a(e 8average 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 fr4oazx9cmunf5un:9e j,h i*0e om $12 \; m/s$ to $25 \; m/s$ in 4.4 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 frok xxqf ;nj2c3:m $21 \; m/s$ to rest in a distance of 71 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reach a spf+y iw3n85 d qfcv*,tap/ncw7eed of $31 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $2.3 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinter can burst out of the bltqnv7i(sja8 h(8vw+ socks to essentially top speed about(7jaqs8 it (s vhw8n+v $11.0 \; m/s$ in the first 14.2 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 speed oq;1j3 opcqm9yf $16 \; m/s$ to rest in 5.98 s. How far did it travel in that time?  (数值)  $m$

  In coming to a stop,tk7 vrk 9w9/s6y)/ic.v azy+ihq x5dc .jxyx3 a car leaves skid marks 92 m long on the highway. Assuming a decelerationarj/6qxvy 5twy37v9).+ c/xsyi.izd9kc kx h of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck g9fx1fhk3xrpz,3 s ph o pr1x;6oing $25 \; m/s$ 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).    $m$