Suppose that an object travels from one po -*6g/ gg65vgp nqbfapint in space to another. Make a comparison between the displacement p5gf g*/pgnvqg6ba-6and the distance traveled.

  When is the average velocity of an object equal to the instantaneous /qckrc) psw+ (velocity?

  A new car manufacturer advertises that their car can go "fro 2swmnlus +.81r0pxf -)ai wtlc/.frim zero to sixty in 8 w2lsfnlr0)txr a.- f i18/smipw+cu. s". This is a description of

  An object moving in thfr*cq*o/ wxh7 e +x axis experiences an acceleration of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to th,d5 s 3 (lxcjoqhx4s+mzd kdsn 81c5c;e East (+x direction) begins to slow down as it approaches a traffic light. Make a statement concerni; z8dk5x5dcon ds s(hjm13x +l,ccsq4ng its acceleration.

  Suppose that a car traveling h;/lkrea f d,gl/y44yto the West (-x direction) begins to slow down as it approaches a traffic light. Make a statement concerning iya 4 edylhl;4r k,f/g/ts acceleration.

  Suppose that an object is moving with a constant vel8x7tjw:7wa y p ftpr*,ocity. Make a statement concerning its tt*r:pwj ,8a7xwf yp7acceleration.

  If the velocity of an object is zero, does it t2ua (14oi wjfmean that the acceleration is zero? Support your41wf( i2jta ou answer with an example.

  Can an object's velocity change direction when if+lkca2m7p 0 16nl szy7c, rtrs-8n dwts acceleration is constant? Support your answer with an examps,ncpad 7rk0tm f8l76 1-2wylnzs r+cle.

  Suppose that an object is moving with constant acceleration. Mak (kyptk*m,l, iwm1o72s f3tms e a statement concerningl2,3p(swo,m f71*kt im tm ksy its motion with respect to time.

  Can an object have increasing speed while its acceleration is decreqr)e o);s-k+j:qv:vfb bb5suasing? Support yo):o sbbqf j-q;ve)5:v kubr+s ur answer with an example.

  Suppose a can, after an u;g 2n6 -1gf-herex. ukymw)uakw61minitial kick, moves up along a smooth hill of ice. Make a statement concerning i)eawu 1 km 1kwr -;geg-xhu266nf. myuts acceleration.

  Under what condition is average velocity equal to t n61d1bzp/ouh.+ieut )p y1uphe average of the object's initial an)eu z/p61t.hbd +pyn1o1up iu d final velocity?

  Objects A and B both start at rest. They both accelerate at the same rate. Howxaf,u eb5k3-h ever, object A accelerates for twice the time as object B. What is the final speed of object A compared to that of object B?h,k ua-3x5e fb

  Objects A and B both start from rest. They/ugijeeqokjcs pt d/n :,06 )+ both accelerate at the same rate. However, object A accelerateseioku) jsg /qecjt :0,p n6/+d 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 the absence ofsg /67qnxn)xgw6wxt5 friction, which of the following is true concerninxw6 5/t7nnx ) sqgxwg6g its motion?

  When an object is released from rest and falls in the absence of fricun 672ja+r- / tdqv-+dfjlcn)ku fx n-tion, which of the following kcv2-flfnxun u/td j6+ rqd+a-7)n-j is true concerning its motion?

  Suppose a ball is thrown straoh ptzw2al- (6oq5/xm ight up. Make a statement about the velocity and the acceleration az qh6t-x/ lwm25(poowhen the ball reaches the highest point.

  Suppose a ball is thrown straightkf 93y7; hqu)wu:v rqk up. What is its acceleration just before it reaches its :hfry9;uq73kuk qvw ) highest point?

  Suppose a ball is thrown straight up, reacheseaj1aom*v af5 0.8bup a maximum height, then falls to its initial height. Make a statement about the direction of the velocity and acceleration aa*uae0m bp 5f v.oj18as the ball is going up.

  A ball is thrown straight up, reaches a maximum height, then dl 1za,iat. 8u cx5v2hfalls to its initial height. Make a statement about the direction of the velocity an.2u5 18at ,acxlz divhd acceleration as the ball is coming down.

  Suppose a ball is thrown dov(cf(n55 wnfv -6 ajn,vt/plv wnward in the absence of air resistance. Make a statement concer( 5a/ft6vw5njfn - v cvl,nv(pning its acceleration.

  Suppose a skydiver jumps from a high-flying plane. What is her accelerfl(zsn v3z.q )ation when she she reaches terminal velocity? vsz ()lnzfq3.

  A ball is thrown vertically upq 9*j5xahdm/l:x b1oyward 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 to that of m/a1hxj*5 bl:9oxqyd the first ball? (How many times higher does the second ball go than the first ball?)

  Ball A is dropped frabv ;h0aze6n-1uf 1 g4to (pvuom the top of a building. One second later, ball B is dropped from the same 40vzv1 ;gh6 1-banopeut auf(building. As time progresses, the distance between them

  Ball A is dropped from the top of a buildin5ara;+2 ti sx)7czgryk4 ta.hg. One second later, ball B is dropped from the same building. As time progresses, the di;gy)axsi5tt4h. a2a 7c+rrzk fference in their speeds

  Two objects are thrown from the top of a tf (tbi90gnzrd(r h7 v4all building. One is thrown up, and the other is thrown down, both with the same initial speed. W0g rhv(nrzif9 d(7t b4hat are their speeds when they hit the street?

  A brick is dropped from the top of a building. A second brick is thr-2 ( f aravad(swz/f6it g.ar+own straight down from the same building. They are released at the same time. Neglect air -v. dr gtaaf(a/iz6(wr+ fsa2resistance. Compare the accelerations of the two bricks.

  An object is moving with constant non-zero 2c m;h.o6.hqq msxz1evelocity in the +x axis. The position vehc m62 eh;zomsx.1q .qrsus time graph of this object is

  An object is moving wiywf f0n+n4yb 0e.yywm60b w 1tjf(tj 9th constant non-zero acceleration in the +x axis. The position versy j401m fff+n9ywtt 0b06yj(.b wwyenus time graph of this object is

  An object is moving with constant non-z fi;ozl 4lo74mero velocity in the +x axis. The velocity versus time graph of this o74mof4;l iozl bject is

  An object is moving with constant non-zero acceleration in thewj4goui;6 sn:x f x,5e +x axis. The velocity versus time grapxi5 o,4e6fsgjuxn: w; h of this object is

  The slope of a positionthjt o0jgn2 oc*q+v4j.,zj *v versus time graph gives

  The slope of a velocity versus time 2t a10r)bulw7a( zulk graph gives

  The area under a curve in am)2 yedo- nbfjxi:(4 zn acceleration versus time graph gives

  The area under a curve in a velocity versus tim+pfwyo vc0;st3h p *;pe graph gives

  If the position versus tim ehksdl 79wd 5olw1n9(e graph of an object is a horizontal line, the object d9wlo(wkd1sl 7hn 5e 9is

  If the position versus time graph of an object is a verxnu e71 +ce(ottical line, the object is (x1e7o+en utc

  If the velocity versus time graphvkm.vh ;z;8,zdy6 bidq ou)) * n2ofyy of an object is a horizontal line, the object isk vyoz nyb,*dvy6u.od2i) h) ;qzm;8f

  If the velocity versus time graph 2w:oi *hn9k(ybrjs9bs) 0seo of an object is a straight line making an angle of ihyke o2obs9wb:s90(js*)r n30 degrees with the time axis, the object is

  An object moves 15.0 m north and then 11.0aoz7*2h8 w jtu m south. Find both the distance traveled and t7z*t2w h8uaojhe magnitude of the displacement vector.

  A boat can move at 30 km/h in still water. How long will it take to move 12 km p 1* ez.5jtf3z- 3e 8s-m swh9vdbd rhwm+nl6mups95 wfn-v1.ebhwjrdm dzze3- + s68m *hlmt3 pstream in a river flowing 6.0 km/h?

  55 mi/h is how many m/s? (1 mi = 1609 mv/;b-h: bkx k tvaz..a)

  What must be your average speed in order to travel 350 s 2o +yk fq4zs*wp(t9fkm in 5.15 h?

  A runner ran the marathon (approximately 42.0 km) in 2 hours and 57 m2uub) bxy4 pci,//zax ;4thenin. What is the averagbuu,x4x 2)yc4znpi; tba/eh/ e speed of the runner in m/s?

  A car travels 90 km/h. How long does it takgdy2.vr ))v1ipq-iqvs e x /t.e for it to travel 400 km?

  A ly (light year) is the distance that light tgp v; 7rw*ubp3ravels in one year. The speed of light isb;3 rwg vpup*7 $3.00 \times 10^8 \; m/s$. 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 roaduusr 55 4vtg hh5so-he5: k7mk and you look to the side for 4.0 s, how far dosr7 5hg4:khk hem5-u5s uvo 5t you travel during this inattentive period?

  If you run a complete loop around an ngk h (z 45ikgu:z3493 wm jwa5bt1fwgoutdoor track (400 m), in 100 s, your averagg z(hwi w j4gnk49 5ufgak5b3t3z:1wme velocity is

  A polar bear starts at the North Pole. I s wvm+r 2:lc+6nf4r lfrc;cr2t travels 1.0 km south, then 1.0 km east, then 1.0 km north, then 1.0 km west to return r cccrlr+6ml nv22sff;rw:4+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, then 1.0 km ei9mz, u c)jc.rast, then 1.0 km north, then 1.0 km west to return to its starting point. This trip takes 4c9u,zci.m j) r5 min. What was the bear's average velocity?

  You are driving home on a weeh622i 6*zf 5sgd jwdqowlw8.ckend from school at 55 mi/h for 110 miles. It then starts to snow and you slow to 35 mi/h. You arrive home after driving 4 hours and 15 minutes. How far is your fw6jwlzh iqd.2 s*c8gdw5o62hometown from school?

  A motorist travels 1 bz/zja92t1j p60 km at 80 km/h and 160 km at 100 km/h. What is the average speed of the mobz p/ 9j12tazjtorist for this trip?

  A motorist travels for 3.0 h at 80 km/h and 2.0 h at 100 km/h. Whab iw (4yjc5e39crvc :yt is her avera4ir93ebvj c5w(cc yy :ge speed for the trip?

  An airplane travels at 300 mi/h south for 2.00 h and i-dk4;ggptg8a5bupyir 5oq0)d ej8/ then at 250 mi/h north for 750 miles. What is the average r 55ea )p/gd8;b uk4q-pyitgd o8ji0gspeed for the trip?

  In a 400-m relay race the anchorman (the person who runs the lasu*+;n/mu2: ryvd fq x pu;q2lwt 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 order that the team A ryn;qw u vlu/d+uf22;q mrx p:*unner not lose the race?

  A car decelerates uniformly and comes to a stop after 11 s. The car's ave*8 bpfeh c8(ntl9pd /crage velocity during deceleration was 38 km/h. What was the car's deceleration while sloc tedb 9hpnplf(88/* cwing down?

  An airplane increases its speed from 100 m/s to 160 m/s- sw rert*/ pz)lze6qn)z7t0c, at the average rate of 07crt-) n*6zq/spl twreze )z$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h accelei+z. bk,:oxdz rates 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 accelemd,4/ab je tj)rates 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 coeurghy+a 27 k,nstant acceleration of ayrh 2ek, gu7+$2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial velocity of 6.2 m/s 7o) chdzejn2gn *e +f1 ,.gtxuexperiences a constant acceleration of c1+e, ex)f hzg2tgndnj.u7o* $2.1 \; m/s^2$. What is the cart's displacement during the first 9.9 s of its motion?

  A bullet moving horizontally to the eq 5nar g)*gx1right (+x direction) with a speed of 386 m/s striga*e)r x ng5q1kes a sandbag and penetrates a distance of 95.15 cm. What is the average acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is launched from a catapult:i d(9g,mcw,pm htm 3i on an aircraft carrier. It reaches a speed of 42 m/s at the end of the catapult, and this requires 2.0 s.ii:mcm p, wht9(m, gd3 Assuming the acceleration is constant, what is the length of the catapult?

  A car starting from rest moves with cs q0unls;*+v. 01ia(gu, hnihy 7czpa onstant 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 distanukr2zg v(+aa bm+r-z,ce of 200 m. What is its average accel rmg+a( uza b2kr+z,-veration?

  An object starts from rest and undergoes uniform a ;vlu.qd- f9pguo. dd -di7wp5cceleration. During the first second it travels 2.5 m. How far will it travel g p .vd-o 7uqulif;wdp-5d.9dduring the third second?

  An object is moving in a strac3qayz3dw 79ilh9lv 9mydp/ 3ight line with constant acceleration. Initially it is traveling at 16 m/s. d9l hp3 y9iw9vqc z3/37ay mdl Three seconds later it is traveling at 10 m/s. How far does it move during this time?

  A car starts from rest aw)tt ud(gi bt(h(,,hand accelerates 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 can decelera,ey k1oeqz 1 anyjj 995-6casrte 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 cd1 cm i/bjwmkr wi(.2h1nfx7/ ar that has been waiting at the intecr27nx/ kd1iwhbf1w m/ im(.jrsection 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 spk3*h-4hq xmvlfn-ex6e3 1ld r eed of 12 m/s on the surface of planet X where the ac*vxl34efxhk3qnm rd1 e6 --l hceleration due to gravity 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 ( yf;,. 9xftt 91oy mkhhn-voum/s on the surface of planet X where the acceleration due toh ; khfto9 ,nyu( o1.myx9vt-f 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 sc 82o0qnbh5q,n. sma bpeed of 15 m/s on the surface of planet X where the acce2.a,sbnqm5q n8c0hb oleration 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 p5+ij.h;z8ez l j- ;uwqbfs/l planet X where the58-i+jhszeujp lf l;;b/.w qz acceleration due to 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. If your friend h) qg4pziz)* bs,qnva/olds a ruler be, qsbqi4p a/v)n*z )gztween your fingers and releases it without warning, how far can you expect the ruler to fall before you catch it?

  A ball is thrown upward at a velocity of 1gu,s k2q2bxo. 9.6 m/s. What is its velocity after 32qg2k. su,oxb.00 s?

  A bullet shot straight up returns to its starting point in 9 s. wan moksiey,r74 9 ;o6What is the ini74 9isam,wnkooyre;6 tial speed of the bullet?

  A ball is thrown straight up with a speecdm4fq)1to)g)f mio + d of 36.0 m/s. How long does it take to return tmqmf)+4o o dc)f )ti1go its starting point?

  A ball is thrown downward from the top of a bk;nfps k 9;lyin 7 /b*8kxff5ycw. g3quilding with an initial speed of 22 m/s. It strikes the ground after 7.1 s. How high is t*7/l;;q.9 cfk8f s3kfbi5wyxnnk yp g he building?

  A ball is thrown straight up with a speed of 30 m/s. (only fill in numericax 6 dryf(iad95:+p0izhm8x etl value in tha56 ptxm0ri8+fd( h:z9eyd xie 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 t;2mr,cb7 3u cl: sggzqhe air with a speed of 45.2 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 13 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 13.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what is t zp7 -pkv,yc7uhyz-;m he velocity at t = 1.0 s?

  In Fig. below, what is yrz-q ;j( h -m:5alaqdst n. 3+s tqa:j/*qwtgthe velocity at t = 2.5 s?

  In Fig. below, what is the velocity at t = 4.0 s61aq4xre47 ak r5elam+boug , snc 3j8?

  In Fig. below, what 4x5(jx3c9cd.jf0 q zgy s7/brhsxl t:is the velocity at t = 5.5 s?

  In Fig. below, what is the average veloln31)scgx0wc6o1w )u cw; c gycity from 0 to 4.0 s?

  In Fig. below, what is the average velocity from 0 to 6.0 s1i y06nr yhu)/ 9jddyr?

  In Fig. below, what is thec 0zc+g 1net5mg.;y.thev1jx acceleration at 1.0 s?

  In Fig. below, what is thedxr xs3 lqz/ 4*kbt0/vp;kn -t acceleration at 3.0 s?

  In Fig. below, what is the ave,3 /zbxv 7gk- rrfl:garage acceleration from 0 to 5.0 s?

  In Fig. below, what is the df3rfd,ws 0 .aaverage acceleration from 0 to 8.0 s?

  In Fig. below, what d, 0 jpli qrlx6 ,5.o:svyve,clo8g :7hsyr-l is the displacement from 0 to 8.0 s?

Does a car speedometer -s5 xj5i3xp nj ebw.a-f3-rupmeasure speed, velocity? {speed|velocity}

  An object can have a varying speed if its velocity is cons2 b)3xi)mmutatant.

  The velocity of an object can be negative when its acceleration is p.pqws1d5: owpositive.

  If one object has a greater speed than a second object, the first must h;ac2:;6 biuvx qd ufc;ave a greater acc6;d:xu a;;u ccfqb2v ieleration.

  Two cars emerge side by side from a tunnel.a yoz3m5 9.cb6)kfbsp 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 itsb(3qb1ev cfch3*yel; orz7:h acceleration decreases.

  A baseball player hits a foul ball stk)ylob,/ 7drl+o9/scluj7 v b)c g(hcraight up into the air. It leaves the bat with a speed of ) /bksg,h/co) +yjloldc cbul(r7v 79$120 \; km/h$. 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 accele/xl ui*c*p/rqration, how does xu*q // lcp*irit change if air friction is ignored?

  As a freely falling object speeds up, what is happening to its acceleration,3r * 5bk wmaap6v x41o6oppi;h how does it change if air friction CAN NOT bexkivohwpm 1a ;b65apr 3o6 p4* ignored?

  An object that is thrown vertically upward will return to its original positiomyaaa;+ neo912q 5wgcn with the same speed as it had initially if air resistance is neglig gn5oy wam a1;eq2+c9aible. If air resistance is appreciable, how will this result be altered?

  An object can have zero vepf; aoa .31wqwlocity and nonzero acceleration at the same time.

  An object can have nonzero ve r.;ijd0 ir,vonvd:3dlocity and zero acceleration at the same time.

  An elevator moving from the seu;bkwc 61maa vl/6li r2nso;ut51 s x,cond floor to the fifth floor making no stops along the way has zero acceleration all the s ; i uc1l2wrkanu6tolx b1mv;,s65a/ time.

  A rolling ball moves f2h0 sus ;pgfznp1gf2.rom $x_1=2.6 \mathrm{~cm}$ to $x_2=-7.3 \mathrm{~cm}$ during the time from $t_1=2.6 \mathrm{~s}$ 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 $t_1=-4.7 \mathrm{~s}$ is at $x_1=2.8 \mathrm{~cm}$ and at $t_2=3.0 \mathrm{~s}$ is at $x_2=7.2 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete laps around a q0lkr 32a9-n *oarihf klsf 24yuarter-mile ($1 \; mile = 1609 \; m$) track in a total time of 8.5 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, movi npur6yjfq8/,ng 88 m away in 13.5 s. It then/jnq8,pr u6y f turns abruptly and gallops halfway back in 4.6 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 from8w 5r.nxrrx2d $13 \; m/s$ to $24 \; m/s$ 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 from )4il;nieah k5,-pnj rcy -lh:$20 \; m/s$ to rest in a distance of 72 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reach a speed y*3afhh 5-gxsw q(nq2of $27 \; m/s$ 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 oumv .3k wwsipni)ti1 l;sxm /v,+-hct+t of the blocks to essentially top speed about x+v3iik,/nmhpvws i+tsm1t w).l;- c$10.0 \; m/s$ 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 s5z9 64vw+n ,dpjwj-qge,,0r oz znduof $17 \; m/s$ to rest in 4.96 s. How far did it travel in that time?  (数值)  $m$

  In coming to a stop, a car leaves skid marks 92 m mi7w o mo4pue.wvo.0( long on the highway. Assuming a deceeoou.7pm4 .vo i0ww(mleration of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck g- pku1)cqn kz94r qd)xoing $25 \; m/s$ 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. Afal 6+gh.js,ktter exactly 27.0 min, thalh.g6j+ kst, ere 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?    $s$