Suppose that an object travels from one point in space to anoth+-r rws p70lrzer. Make a comparison berwlz+0spr -r7tween the displacement and the distance traveled.

  When is the average velocity of an object eqnve):ky s7s-p(t- zqs ual to the instantaneous velocity?

  A new car manufacturer advertises that their xkr qc(tpob(*f(n i9yv/yf+. car can go "from zero to sixty in 8 s". Thir(f+vqnxy*bc/.kot( i 9p f (ys is a description of

  An object moving in toe4)tsni15d4ya-w :w yjm g /lhe +x axis 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 as xqisuets/ :im8ezk3h.h)-do j i/ o1 7it approaches a traffic lit e7 h:j8zx/s1i)iohmo e.dikus q/ -3ght. Make a statement concerning its acceleration.

  Suppose that a car traveling to the West (-x dirdl 5jo+u:j2 keection) begins to slow down as it approaches a traffic light. Make a statemjeku dj+25l:oent concerning its acceleration.

  Suppose that an object is moving with a constant velocit fwp0u 6c p7f;6f/bxgjy. Make a statement concerning its accfgf0b/7;uw66ppfx j c eleration.

  If the velocity of an object is zero, does it mean that the acc9/ic(l d /txhheleration is zero? Support your h//lxt( i d9chanswer with an example.

  Can an object's velocity change di: v3w*u7cix fdrection when its acceleration is constant? Support your answer withxv: 37d cf*uwi an example.

  Suppose that an object is moving with constant acceleratilk2d hij w8.. 3sdy:cqon. Make a statement concerning .ldy8sh .2qwk ci:dj3its motion with respect to time.

  Can an object have increasing speed whil m: k.ky:c*z.j /xk8 dsrgp9vde its acceleration is decreasing? Support your zmx d/9k :d y.kjvkcgs rp.:8*answer with an example.

  Suppose a can, after an initial ;w/it l8gxe b*eh3:pqkick, moves up along a smooth hill of ice. Make a statement concerning its acceleration.*iqpbt w;83xe :e/glh

  Under what condition is a/xc0):i8ggmnc t l5giverage velocity equal to the average of the object's initial and finc:)gxmggc i8t0/ li 5nal velocity?

  Objects A and B both start at rest. They both accelerate at the same rate. udt: k xdh4-lus- v+1(5fe7lk6 onreu However, object A accelera5u+1k:er4l( vntd d xkeuh ol-7-6 usftes 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 acceleratx:kj:f+qr:qc8xj(cusu 0g2e e at the same rate. However, object A accelerates for twice the time as object B fjk(su08uc:g:q r2jx :qxe+c. What is the distance traveled by object A compared to that of object B?

  When an object is releasedjtofu :x3x .)+o;bqm k from rest and falls in the absence of friction, which of j3txbx;ufk.: qm o)o+the following is true concerning its motion?

  When an object is released frd,i :0g 5gwgh j w:lh98dxb(mqcv0i)com rest and falls in the absence of friction, which of the following is true concerning it5g90d wbhcvgi(c,): dx: hwgm8i 0jl qs motion?

  Suppose a ball is thrown straight up. Make a statalo(nr)s;)x xw6y1f tement about the velocity and the acceleration when the ball reaches the highestl w)a xr yso6nxtf();1 point.

  Suppose a ball is thrown straight up. igu c)8/.ic0x y aky5u What is its acceleration just before it reac/y85u y0c)auxgick .ihes its highest point?

  Suppose a ball is thrown straight up, reaches a maximum heidi uh)w-pbs7 )ght, then falls to its initial height. Make a statement about the direction of the velocity and acceleration as the ball-i)h u 7dpsb)w is going up.

  A ball is thrown straight up, reaches a m *ups qwx8vp0 (3ulbh8aximum height, then falls to its initial height. Make a statement about the direction of the velocity and accelewplx bup3s hv8u*0 q8(ration as the ball is coming down.

  Suppose a ball is thrown downward in the absence o))h2fxl.4jtq1sk x q wf air resistance. Make a statementxx4.)l k2)jh qs wtf1q concerning its acceleration.

  Suppose a skydiver jumps from a high-flying plane. What i9 (0tu oae:iw ;(wbjxis her acceleration wheo9 0;ew b(uwit:j (xain she she reaches terminal velocity?

  A ball is thrown vertically upward with a speed v. An identical secc:dd9v1 +urz53qw adgond 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 timv1 d+9qzcug3wd5dr :aes 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 i+-i8rk; oqcyvoytzy.kcp q6x 4c +6 q,s dropped from the y-cqok y +cqt,opc;yz.qv4k+6irx 68same building. As time progresses, the distance between them

  Ball A is dropped from the top of a building. One second later, blj7 v ;imb2*zball B is dropped from the sal*; ib7 mjz2vbme building. As time progresses, the difference in their speeds

  Two objects are thrown from the top of a 6nsmr 0 2a hny-mpw5a.w8q25- wyb noctall building. One is thrown up, and the other is thrown down, both with the same initial speed. What are their speeds when they hit the sqnp.n o652-2hwbmanwas wmy c5y 8r 0-treet?

  A brick is dropped from the top of a building. A second brick isj 4o1win.yu;a thrown straight down from the same building. They are released at the same time. Neglect air resistance. Compare the accelerations of the two bnw jo4a.uiy1;ricks.

  An object is moving with constant non-zero velocity idr;/ rl:mr3) ls6 76muk aiugsn the +x axis. The position versus tim7il)r url/ k ;ga 3ssr:6ud6mme graph of this object is

  An object is moving withtj(++ 9 oxsv)2yj.gp sdxz 2lq constant non-zero acceleration in the +x axis. The position versus time graph of this objy+ os pqvtsl+jz( x. )gx2dj92ect is

  An object is moving gi 4t3me i1r0-9jas3w wzcqq/ with constant non-zero velocity in the +x axis. The velocity ver3wr0itj w/4 1emsq39aiq z- cgsus time graph of this object is

  An object is moving with constant non-zero acceleration in the +x axis.ufgp- ; abaw/2 The velocity versus time graph aw-;u /p b2afgof this object is

  The slope of a position versus time gre :ef8qv v;6flq 3r-vpaph gives

  The slope of a veloc cim:08zs*ey j-5 bp3y :ykcnyity versus time graph gives

  The area under a curve in an acceleratio 0,zmhsv +*wvin versus time graph gives

  The area under a curnkxknkg+ chf+./tw ibi+8 3aa*d-ul) ve in a velocity versus time graph gives

  If the position versus time g zr; s/a/hmlmaai0 *-vraph of an object is a horizontal line, the object am-aih;m0v z* r//alsis

  If the position versus time graph of an j,v-t -imv9w/,m mqs,l6 uvgsobject is a vertical line, the object iss,qv m-mvu, /ltj,9 mwv 6-sig

  If the velocity versus time gr:wo (zxhd1 /;cb-bi bws**mslaph of an object is a horizontal line, the object is mlh1bc/ swsd ( xbb*;o-z*:iw

  If the velocity versus time graph of an object is a straight line makinq8x);rtgvaada((0 pjl xto (7g an angle of 30 degre( joat g;q(xax(lra8p v0)td7es with the time axis, the object is

  An object moves 15.0 m norobg. omi:sh9 c dkiqws5g9y so w9/642th and then 11.0 m south. Find both the distance traveled and the magnitude of the displ/bh m6 d. g:9wo q4g9iywc95osssk2oiacement vector.

  A boat can move at 30 km/h in still water. How long will it take to move 12 km on3oejmg6i2qs, mls*l 4:: nl upstream in a river fls l:o*4 in smg2l6qo,m :3lejnowing 6.0 km/h?

  55 mi/h is how many m/s? (1 mi = 1ve zlqk;;hqa;vfpsh v+ c2ak (5a.. p3609 m)

  What must be your average speed in order to tra/lat87;xajhv +-k kqk j5-qjs vel 350 km in 5.15 h?

  A runner ran the mar,uv7p m(93irw 5xzuorathon (approximately 42.0 km) in 2 hours and 57 min. What is the averagwuv9( i, rrmpxzu7 53oe speed of the runner in m/s?

  A car travels 90 km/h. How long does it take for it to travel 400 k 5)rd- tn zkjkdc5xr0d-n1av9m?

  A ly (light year) is the mnt/gb8 dgviz5a-,3 6ukla7 edistance that light travels in one year. The speed of light isba/gv tld g68e,7k3ua-m 5 izn $3.00 \times 10^8 \; m/s$. 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 roa0wyzn t2)**w pmioo5xlah(bo66g5 t rd and you look to the side for 4.0 s, how far do you tr opw6 lot2 5nga*rm oh5w0xby zi6(t*)avel during this inattentive period?

  If you run a complete loop around an outdoor track (400 m), in9d3li+c4p ha(tgjcg 8:ns ,rf 100 s, your average velocity iscani p g3ljc : r8,sfg+4(9hdt

  A polar bear starts at the North Pole. It travels 1.0 km south, then 1.0 km e3 nou gq9 b-nj+wr+9hcast, then 1.0 km north, then 1.0 km west to return to its starting poin r+g+uo9j3 hq ncnb-9wt. This trip takes 45 min. What was the bear's average speed?

  A polar bear starts at the North Pole. It travels 1;x. zxc91d opr;j 3wcg.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 o1 gpw9cc;. x;rxz3 djaverage velocity?

  You are driving home on a weekend from school at 55 mi/h for 110 miles. I3i;law4yxvj vrgnx :33b;s,r t then starts to snow and you slow to 35 mi/h. You arrive home after driving 4 hours and 15 minutes. How far is sy,:xn;bwvrgj 4xar3 v3l i ;3your hometown from school?

  A motorist travels 160 km at 9v44t 2p;8vh : 6nxwmgdvd gpi80 km/h and 160 km at 100 km/h. What is the average speed of the motorist fohdi :t nd g8m42p vv4;gx69wpvr this trip?

  A motorist travels for 3.0 h at 80 km/h and 2.0(wx e*zolef-).zy6 )s*hr nsqv91qkc h at 100 km/h. What is her averaglqqx)n*6(w er k)zov. z9h cys*fes1- e speed for the trip?

  An airplane travels at 300 mi/h south f:d ;z f8g*i7sq(lzqtcor 2.00 h and then at 250 mi/h north for 750 :z* l gz8tfcqd;7 iqs(miles. What is the average speed for the trip?

  In a 400-m relay race the anchorman b:b --ij*ndtm4d.dtq(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 wid4b. bdt*d:q jn-tm- hen 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 u,gx,lj odq0c qa8*r/l p5a.rto a stop after 13 s. The car's average velocity during deceleration was 75 km/h. What cu5l.*8qr pdq/ a0o,ga,lxrj was the car's deceleration while slowing down?

  An airplane increases its speed from 10nip(ns hy/2byoqv0pm9x;s7 / 0 m/s to 160 m/s, at the average rate of vms7s(x/bhpn 0p /qoi29 yn;y$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h acy opqds/h bu-qmx x./7z9;n4xcelerates 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 restxujn;,,v2(v7ruvypcu z-v/ f 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/s for 10 s. j p hsfno/zg98s3zz*ip7di -4It then speeds up with a constant acceleration of 8n/*o 4s3izz7jsgpp-i hd9 fz $2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial velocity of 1.5 m/s experiences a constant acce f iqzj:c/-iemgcg),:leration of/imq i) fc:-zje:cg,g $1.2 \; m/s^2$. What is the cart's displacement during the first 4.8 s of its motion?

  A bullet moving horizontally to the right (+x direction) wit b3+lq vbh3cas*s, ev8h a speed of 464 m/s sb8svq v3b*h +sel a,c3trikes a sandbag and penetrates a distance of 74.49 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. .40j nr*x b 6peld3ugn 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 thlb6*3xdp un04.engj r e catapult?

  A car starting from remkvg y51wvegg y* -k0v3 (+lrkst moves with 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 20j*ecf*2jeg;a r)fwa zef*a2+ 0 m. What is its average accelerati2f a)e** *jzafc; eagre+2jfwon?

  An object starts from rest and undergoes uniform acceleration. gn k8dqx35 c)91x 6 o 4wfo/qtraki2msDuring the first second it travels 3.1 m. How f/sk 3 oqwa q5mdi9t f1c r24xog)kn8x6ar will it travel during the third second?

  An object is moving in a straight line with constant acceleration. Initially itupd4a;r .,zpm fv8/ z6/pd)e6eirg qo is traveling at r66u.r z;8 o4 ae)vzq/pig ddpfp,e/m16 m/s. Three seconds later it is traveling at 10 m/s. How far does it move during this time?

  A car starts from rest and acvemelyjio. 5o;n, g .z/q24c ycelerates 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 road cabcr4;dqf-ccr 5jq 0s2 n 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 lige us2qusdhlmvd-z0t;308. c tht turns green, a car that has been waiting at the intersection starts a el3 t8sd hv; u2m.-0u0dcstqzhead 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 4+mc) svp8 vnt)vo/oe surface of planet X where the acceleration + vpo)ms enc8) t4vvo/due to gravity is $1.5 \; m/s^2$. What is the maximum height reached by the object?

  An object is thrown uxnc x6/q.u*x.ewkcgcs3 iu-k(2v 2q *ebuqq2 pward with a speed of 12 m/s on the surface of planet X where txqgk6 e w3/u2q-xxc 2eciu .vbq * nq.cu(2k*she 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 s b(/js(wgk. ynpeed of 15 m/s on the surface of planet X where thnw(s/b g.(j kye 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 upward with a speed a:d6/af ivp3 (g/eq*cvtbo c +of 14 m/s on the surface of planet X where the acceleration due to gravab v*c:+v/fcqdoe 6/3(aptigity 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. Ifz8/ ( wuu,)h)mgxga rntti8/(t9r xbmw af70m your friend holds a ruler between your fingers and releases it without warning, how far can you expect the ruler t /mxuwzwfba ntmui8t /r)ga)(( m,790r8ght xo fall before you catch it?

  A ball is thrown upward at a no(z 24p7tvctlmb wx1uh +5)s velocity of 19.6 m/s. What is its velocity after 3.00 s?bpzhmcv7)o4w st x t2( 1ln+5u

  A bullet shot straight up returns to its starting point in 14 s. What is n8l8 c(vsd3ks the initial speed dns8l(3 cvs8kof the bullet?

  A ball is thrown straight up with a speed of 36.0 m/s.vvyfa y) )aic. i(ycslld .ufc8)*f7; How long does it take to ret vf*fc .y;lcu.(syfca yv) 8 )aid)il7urn to its starting point?

  A ball is thrown downward from the top of a building with3m zqr9j,x-es an initial speed of 21 m/s. It strikes the ground after 4.qj em3-,x9z sr5 s. How high is the building?

  A ball is thrown straight uu+ojsyo;hzzlq / ; dis/:w7h0p with a speed of 30 m/s. (only fill in numerical value in th;/wdj /z i7uqosoly;+s0 : hzhe 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 with a speed of 22.9 m/soj r biee 3y/sr(of1*r9 xo(.u. (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 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 is t;)h )g*9xyudlg 9ull ehe velocity at t = 1.0 s?

  In Fig. below, what is the velocity at t = 2.5 yx .5.h) 6iapeer iru*jl,rv8 s?

  In Fig. below, what is the velocity at t = 4.0 c oq+cn*ri9x 6s?

  In Fig. below, what is the velocity at t = 5.w8, ifk8dw3b o5 s?

  In Fig. below, what is the average velocity froidop3c-:/ifc m 0 to 4.0 s?

  In Fig. below, what is the average velocity from 0 to 6.0+v rg 38ko,6hzmucnqh9c x/n6 s?

  In Fig. below, what is the acce)z y h(vm4g6vds yc8z,leration at 1.0 s?

  In Fig. below, what is the acceleration at 3.0 sn+pxih 8ab pckh :33)b?

  In Fig. below, what is the average acceleration from 0 to 5.0 s:aw( oww9)z t h+xg()ry4dva u?

  In Fig. below, what is the averapp mgqs1:n-q9 ge acceleration from 0 to 8.0 s?

  In Fig. below, what i)5f;nj 7p0g hte hl+fbs the displacement from 0 to 8.0 s?

Does a car speedometer meaun:ngl vv.w/q fs*i /qd(b3l,sure speed, velocity? {speed|velocity}

  An object can have a e5(njq g/y-wr varying speed if its velocity is constant.

  The velocity of an object can be negative when i2e(+qbvzaz/ ymi) a *zts acceleration is positive.

  If one object has a grea.c zv70x2i mc:nznm/vter speed than a second object, the first must have a greater x2/mnnvcc0vz: z.mi 7acceleration.

  Two cars emerge side by side from a tunnel. Car A is traveling wit mrl9 l 0mijs4yib0. bnd)1xkv* y+2nth 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 acp1 qwt3xe3dpjk5 e+ /cceleration decreases.

  A baseball player hits a foul ball straight up in/bk*cq.h; nj8j f7mcy to the air. It leaves the bat with a sm ;cj/bf8yjnhq .c*k 7peed 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 acceleratn6d vjt8tjkb;v33s nadu t/*il o,+o4ion, how does it change if air friud3;obj,d8ks+* nj3t/l6a4v vton it ction is ignored?

  As a freely falling object sppwmhgnx2 g:k,g p 9z+ fjo.i3r)sfz8 *eeds up, what is happening to its acceleration, how does it change if :)+2ir kfpoj p.9 fg *xwn,g3 m8zzshgair friction CAN NOT be ignored?

  An object that is thrown vertically upward will return to its original pos put*sz sk.:5eition with the same speed as it had :ku *s.e5spztinitially if air resistance is negligible. If air resistance is appreciable, how will this result be altered?

  An object can have zero velocity and nonzero accele .l5j8unf0tuf4 jgxa.5b 5yn: hs+n yvration at the same time.

  An object can have nonzero velocity and zero9-n ixk ri: 9li49ctjp acceleration at the same time.

  An elevator moving from the second floor to the fifth f fhs( hnmko9i-4*1svsloor making no stops along the way has zero acceleration amhv * n-fh9sk 1ioss(4ll the time.

  A rolling ball moves from ,sdd.hcp6h*o $x_1=3.3 \mathrm{~cm}$ to $x_2=-4.6 \mathrm{~cm}$ during the time from $t_1=1.3 \mathrm{~s}$ to $t_2=5.7 \mathrm{~s}$. 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 $x_1=3.3 \mathrm{~cm}$ and at $t_2=3.5 \mathrm{~s}$ is at $x_2=7.5 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete laps around a quarter-milen1fv;huswm 5u*i/: w qu-m 4ii ($1 \; mile = 1609 \; m$) track in a total time of 11.0 min. Calculate (a) the average speed  (数值)  $m/s$ and (b) the average velocity    $m/s$

  A horse canters away from its trvvyt2nadsof3) c.0 *ms rp1 o4ainer in a straight line, moving 89 m away in 12.8 s. It then turns abruptly and gallops halfway back 0 31o*am .fryv 2ondsv)ctp4sin 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 frow65f 8 +v xzfn/umff2hm $10 \; m/s$ 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 from7 b/yqno8ttz1;nd* rx $16 \; m/s$ to rest in a distance of 69 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reach a speed ofvl 8pzsl. v1bbji. z2: $28 \; m/s$ 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 bl3jhb* qn(*2pp7a2 vg/ rx(8rxxu uwcwocks to essentially top speed about a x*7*wnpx28pb vqucr(h x3 g2u/wjr( $10.6 \; m/s$ in the first 13.0 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 of ej zx )(4o.fpv$17 \; m/s$ to rest in 4.59 s. How far did it travel in that time?  (数值)  $m$

  In coming to a stop, a car leaves skid marks 92 m 1aremyn*9foxedv1(7 long on the highway. Assuming a deceleea(mev1xo 7yn9*d r 1fration of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck goinren)no87+ npcg $25 \; m/s$ 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. After exactqplvs1c tgym4(44;, g/tj xcply 27.0 min, there are still 1100 m to go. The runner must then accele4sv pg4tj/qp cmc(4 ,1l txgy;rate at $0.20 \; m/s^2$ for how many seconds in order to achieve the desired time?    $s$