Suppose that an object tsf*7)a7n . p8dx:xwb,e gkwt qravels from one point in space to another. Make a comparison between the displacemenke*q wt:d ga pn,sx.fxw787)bt and the distance traveled.

  When is the average velocity of an objecv6d: y6 adh(uot equal to the instantaneous velocity?

  A new car manufacturer advertises that their otoi8m;8 w. jmcar can go "from zero to sixty in 8 s". This is a descri.t;jmi8owo m8 ption of

  An object moving in the +x axis experiences an acceler k579u7rwqt)f)wi uiox5nrr 3ation 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 +nqq;ui2tg ,tas it approaches a traffic light. ,g uqtnt2i +q;Make a statement concerning its acceleration.

  Suppose that a car traveling to the West:gwg4c*d (j r jn1jvw0s.2nm h (-x direction) begins to slow down as it approaches a traffic light. Make a stateme*: . 4jjh(wnv2g1wsc0dr jngm nt concerning its acceleration.

  Suppose that an object is movinghep(0fd.+abc*7q)a 2y ypea g with a constant velocity. Make a statement concerning i7heepc *a+da.)byg y2 f q(0apts acceleration.

  If the velocity of an object is zero, does i6 s)hdnan6;er 8aep t8h7 o+5(qmffk at mean that the acceleration is zero? Support your answee;n+nqaem fa5( )d a7ps68hf6h rkot 8r with an example.

  Can an object's velocity change direction wh36vxcec h +9e:xd:n:ad px e)nen its acceleration is constant? Supp6+nd3 ) e9en:xa x:ecvhp:dxcort your answer with an example.

  Suppose that an objes2zqvvd2 n, odhvein 3g c53 w4040gjmct is moving with constant acceleration. Make a statement concerning its motion with respect,02s3e5 02vdj 4hwd i 34zv cnoggvqmn to time.

  Can an object have increrax67qko s /v37 uava*asing speed while its acceleration is decreasing? Support your answer wit6o u7* vakra/v axqs37h an example.

  Suppose a can, after ann9 hgvg 1.xz(iqgxu 4jb864e f initial kick, moves up along a smooth hill of ice. Make a statement concernie4izu h4(fgx8qjv x 9gg6.n1b ng its acceleration.

  Under what condition is average veloci v xr6z y7r0l7*zuxiv;ty equal to the average of the object's initial and final velocilz rxxy v;u7zv 6r07*ity?

  Objects A and B both x : cv5x(sysn s6(qoe2start at rest. They both accelerate at the same rate. However, object A accelerates for twice the time as object q (5xs :vxeyso6( cs2nB. 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 a6oy55qb nsb.qt the same rate. However, object A accelerates for twice the time as obyon.5qb 6 5sbqject 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 of friction, wh+ ,ti:mv cs0p6ja zwx,ich of the following is trc+, p6sm:t0 w vj,ixazue concerning its motion?

  When an object is released fromi o q-3*muqlwq a8-fwdlj;3s8 rest and falls in the absence of friction, which of the following is true concerning its motion?l ma;* los83qqwj uw-38id -fq

  Suppose a ball is thrown straight up. Make a sta1pk0;nhpph5k ps -d p(tx,ov-tement about the velocity and the acceler5nx1(- pp0 hk-ops vkpdp,ht;ation when the ball reaches the highest point.

  Suppose a ball is thek m+z tgs qx244 cm/jsuw*.s:rown straight up. What is its acceleration just before it reaches its highem. z s:4j+cs uwt* sg2q/e4mxkst point?

  Suppose a ball is thwawqo)d.ub66ws0 j.od whxq-:5m h s,rown straight up, reaches a maximum height, then falls to its initial hei,5-a .6s. h:s)hd 0bwxjdo wuq o6wwqmght. Make a statement about the direction of the velocity and acceleration as the ball is going up.

  A ball is thrown straight up, reaches a maximum height,b4k y1dqgs5mjn0/3 7v:lgcksj(rew 9 then falls to its initial height. Make a statement about the direction of the velocity and acceleration as the ball is co e0 cvn:g bqjg9(dlss k7rj km4yw351/ming down.

  Suppose a ball is thrown downward in the absence of air resistances x-w nmsq1 wcc.:t24d. Make a statement concerning its accelerat sd tw4c.w2:sq1-nxc mion.

  Suppose a skydiver jumps fr. k1: 0xdcsrhwom a high-flying plane. What is her acceleration when she she reaches terminal velocitx1w.d0crs :khy?

  A ball is thrown vertically upward with a speed v. An identical seli63rb/m 8 rw*j*f5iuol t2o xcond 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 firstf2umb8r*lj i5x/o r6ot*lw3 i 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 laji,z p/ 61ozlvter, ball B is dropped from the same building. As time progresses, the distance between thep /izlj6z1vo ,m

  Ball A is dropped from the top of a building. One second later.i 8x81tyhy)0fpazg t, ball B is dropped from the sam t.t8xy8yg1f iz0hp)ae building. As time progresses, the difference in their speeds

  Two objects are thrown from the top of a t p*pof7nn,dg.meh7hrd/9ci + all 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 hf97hc. drmengpp+ /i7n*,o dstreet?

  A brick is dropped from l;0gp;aiin 8d the top of a building. A second brick is thrown straight down from the same building. They 80npild ; a;giare released at the same time. Neglect air resistance. Compare the accelerations of the two bricks.

  An object is moving with constant non-y5x2q.xo zspp sd-h40 zero velocity in the +x axis. The position versus time graph of this object xs5-4yqx p. 0hdzpso2is

  An object is moving with constant non-zero acceleration in the +x axis. Thbk*e 5f0o:hl4kqnj t 9gq4b0 ee position versus time graph of this *9f 4j 5enqbtb:0ehkl0gokq4object is

  An object is moving with constant non-zero velocity in87 ou9g)mxfy y the +x axis. The velocity versus time gra )yg9x7mouf8yph of this object is

  An object is moving with cocx46i k/.1uwu 1 dpm)i6hbbp bnstant non-zero acceleration in the +x axis. The velocity versus time graph obk uib iuc 6141)6mwbph./xdpf this object is

  The slope of a position vers x2pw)a)p ze8. v.ubdsus time graph gives

  The slope of a velocis tmkdz;r*)pipt6* q9ty versus time graph gives

  The area under a curve in an accele)y 74dyjbq4 vc ,t3-hqlmcn7f ration versus time graph gives

  The area under a curve inh ot4 wqis;qys69g3pc* *f7o l a velocity versus time graph gives

  If the position versus time graph of an object is a horizontal line, tvr+q3b a2iy5c*wo/mq8eox 8jhe object is j 8ycmv8o*a ib5e2rx/q+3oqw

  If the position versus time graph of an object is2c6f9zhu2f z c a vertical line, the object is9zz2ch2u fcf6

  If the velocity versus time graph of an object4z)mnbiub4jf7xbtk-:vh2o;e ::sm y :h 5p zh is a horizontal line, the object y) v:i h4 hmfnou-tm4xp:sjb7::25zh; ekz bbis

  If the velocity versus time graph ofy:l*4d ; wcs p(iq36crlky jh. an object is a straight line making an angli.d6;clq4yspk j ly 3crw*:(he of 30 degrees with the time axis, the object is

  An object moves 15.0 m north and then 11.0 m south. Find both the disy;6psse,u xb ;9kcpg16 p-0 5tickepx 5jtem 1tance traveled and the magnitude of the displacement vectop9 jyxt s,p5k1 tbc p e5;e;-xgecump166si0kr.

  A boat can move at 30 km/h in still water. How long will it take t2n c 8a5om yow04y1zuwo move 12 km upstream in a river flowing 6.0 km/w zc 1yuo0w84on ma5y2h?

  55 mi/h is how many m/s? (1 mi = 1)doq qnq6h 8h,609 m)

  What must be your average speed in order to toq/59nd/imb travel 350 km in 5.15 h?

  A runner ran the marathon (app v9. yhb4*bh(bzpp +nyroximately 42.0 km) in 2 hours and 57 min. What is the average speedbnbv p4b +zphy(h9*.y of the runner in m/s?

  A car travels 90 km/h. How eg *rsse11 1tskef,gx.ro/u1 long does it take for it to travel 400 km?

  A ly (light year) is the distance that ligh m/1/cwimzva q1b w+:gw9c-myt travels in one year. The speed of wa1/-bqw1:+zmcgcmyi9m v w/light 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 4.j ah( ad 6q0vug-i(u1s0 s, how far do you travel during thga s-1ud6hi0ua((vj q is inattentive period?

  If you run a complete loop around an outdoor ti;gna/l - p1*jyxica /rack (400 m), in 100 s, your averalji/iya gc-ax/1*n p; ge velocity is

  A polar bear starts at theppg/ vk.e*ps8l .2bwyla 2ju1 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. uw8e / kp*. pbaspy2v.l jgl12 This trip takes 45 min. What was the bear's average speed?

  A polar bear starts at the North h9qy1nq5 4 ,p)tpdxpePole. It travels 1.0 km south, then 1.0 km east,14dpe q, qh 5)nytp9xp 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 average velocity?

  You are driving home on a wee xllzj3hdks; 0 :hgoyn09zy76kend from school at 55 mi/h for 110 miles. It then starts to snow and you slow to 35 mi/h. Yohd;gjz3 xz97s h0:6kln0olyyu arrive home after driving 4 hours and 15 minutes. How far is your hometown from school?

  A motorist travels 1kyv *f,mskm. o/ )xy0c60 km at 80 km/h and 160 km at 100 km/h. What is the average speed of the motorist)ko.cmmx/f ys ,y*k 0v for this trip?

  A motorist travels for 3.0 h at 80 km/h and 2.0 h at 100 km/h. What is her aveco--x((kwd hmrage spee-x( wdc(ohm-k d for the trip?

  An airplane travels at 300 mi/h south for 2.00 h and then at 250 mi/h 4yen9iz bjd 7nq2-e n+3mx8 rvnorth for bi7 md+4 veqzxn-3yr2j ne 9n8750 miles. What is the average speed for the trip?

  In a 400-m relay race t9 s2;kscw ;x/ /.oessb 1k3tuilfjg( che anchorman (the person who runs the last 100 m) for team A can run 100 m in 9.8 s. His rival, the cu91 ke ist/jcwbxg 2s;/( k3;.sflso 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 uniformly anj-p/7(j hoo fpd comes to a stop after 8 s. The car's average velocity during decel7(hfjpojop/- eration was 73 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 th kgf o179m+a, mzmsc0le average rate of 1m km zc9s+g7m ,0lfoa$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h accelerates at the rd1m o a(zl4,kiate 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 accelerates at u)zxjab0ez76 $4.0 \; m/s^2$ 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 constan de2ua8d4c6zt t acceleration o4 ctuad6 de8z2f $2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial velocity of 3.7 m/s experiences a const6 lh +forx;in. yg/ 5glwwdq7iczi. 54ant acceleration o.c.odw7 nx qyrl5iz;h iiw 645 g/fg+lf $2.1 \; m/s^2$. What is the cart's displacement during the first 4.2 s of its motion?

  A bullet moving horizontally to the right (+1x, ttw w 1afgdzz)( :ltu2ay/x direction) with a speed of 252 m/s strikes a sandbag and penetrates a distance of 99.81 cm. What is the averag/tu1(zyftlw 2z)at1:,x w gad e acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is launched from a catapulqezo(- v(lg rxli ;mg8* gdx--t on an aircraft carrier. It reaches a speed of 42 m/s at the end of the catapult, and thgeq*io x l8r ggm(;-(vdl-z-x is requires 2.0 s. Assuming the acceleration is constant, what is the length of the catapult?

  A car starting from res+ 5s6g bnf5ythp5jfg:,pq *e st 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 ofdz9of w wc /4o)e/x4lq 200 m. What is its average accelerc oq/e/4) wf4wxodlz9ation?

  An object starts from rest and undergoes uniform acceleration. During the fir+rishn *vd4c ch); sk)st second i)k;v*cihc s +rsd)h4nt travels 5.3 m. How far will it travel during the third second?

  An object is moving in a straight line with constannt, zmg*;o y38ve0m .n* bcwlbt acceleration. Initially it is traveling at 16 m/s. Three vtlm*gwem c*zyb8 n03 o; .bn,seconds later it is traveling at 10 m/s. How far does it move during this time?

  A car starts from rest ng;, e5:bc:duv4zr evt g1b3hand 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 crizq+f;5l /qkz4oa(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 light turns green, yfl -i hc4+i8uy5lt(8klb n+n a car that has been waiting at the intersection starts ahead with a conn bl ntklu li54+-(8yhf+yc8 istant 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 surface of planet ,hblu j9x m-0(p lyrzx(c-( jzX where the acceleration duexl l9(,jzybr-xcup-h m 0((zj 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 m/s on the sldd .naa ,g6n/urface of planet X where the acceleration due to gd/,gdl6a n.an ravity 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 *i1qdunt jft0ucsm*b+r iu/11 p/jr*speed of 15 m/s on the surface of planet X where the acceleration due j/ ur1bj*di m0tq* 1t+pi1us /cf* nruto 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 planet o*n:2 2,3edvtnz np aq*lm2wmrfuh(kfk0 9 -uX where the acceleration due to gravitynqw k3(n 2:varzd0kt*nm l,292*fheomupu -f is $3.5 \; m/s^2$. What is the speed of the object after 8.0 s?

  Human reaction time is usua 3 8p8ddczebx.lly greater than 0.10 s. If your friend holds a ruler between your fingers and releases it without warning,3zpb8xe 8c d.d how far can you expect the ruler to fall before you catch it?

  A ball is thrown upward at a velocity of 19.6 m/s. What is its velocity afte:9(jr/yp ivww x4 uyt,r 3.ty/:uivj, w9wp ry( 4x00 s?

  A bullet shot straight up returns tdd. pf9qhgo y.e,p6 ;no its starting point in 7 s. What is the initial sp,qdpf 6yndgp;. .9hoeeed of the bullet?

  A ball is thrown straight up with a speed of 36.0 m/s. How long does it t )cll zh kwpo-94vq;obotd+ .4o lnz13ake to return to its starting point) 4z p4z+l3kclv; 1o9l-owtohn .dqob?

  A ball is thrown downward from the top of a building with an i g*3k3 h:zimkby 2pgow* e6ti;nitial speed of 23 m/s. It strikes the ground after 7.5 s. How high isy3:2;mgki p*ebh* o k3tiw6gz the building?

  A ball is thrown straight up with aq j4oq :qf1 jo,n00ofk speed of 30 m/s. (only fill in numerical value i q1ok0:ooffn0qjj, 4qn the 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 ifikjo/4/edw2 u: qp)c nto the air with a speed of 29.9 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 velocityuv h7zs wf;1-*zqd-ae. go6bm at t = 1.0 s?

  In Fig. below, what ,y/p zp+hy:f6 s,q ++ gavadneis the velocity at t = 2.5 s?

  In Fig. below, what is therx qvg+f 9s8 3j e672.lor wuly.b8bre velocity at t = 4.0 s?

  In Fig. below, what is tbwse q: mfyy)sw;.0(m- nyebnr8x 6zdm/66 kwhe velocity at t = 5.5 s?

  In Fig. below, what is the average velocity from 0 t/d h6aonpt/c xm4uq6.gb b3udy1v o(,o 4.0 s?

  In Fig. below, what is the aor0y wz 9*7ayiverage velocity from 0 to 6.0 s?

  In Fig. below, what is the acceleration at 1.0x6sf:7w, 02yxu .j(lnfvsyoh s?

  In Fig. below, what is the p5tdsavj4jcc5 84 o4;1sc nkmnm:j3d acceleration at 3.0 s?

  In Fig. below, what is the average acceleration from 0 to 5.hq 0edjio+,,j.7 ags,y fqwq.0 s?

  In Fig. below, what is the average acceleration from7b9 (tlqawx m0 n7au /hyg81uz 0 to 8.0 s?

  In Fig. below, what is the displaurs(gs )s-2q.bud t1bcement from 0 to 8.0 s?

Does a car speedometer measure speed, velocity? {spero9aexmg 96a2 ed|velocity}

  An object can have a v17zr4fs: hyy3oak pz,arying speed if its velocity is constant.

  The velocity of an objejms+9n +oyx3sktm;5c 6hz -lzct can be negative when its acceleration is positive.

  If one object has a grbiz90i *q smt0eater speed than a second object, the first must have a greater acce0z t*0qsib9m ileration.

  Two cars emerge side by smk:a*o, +ccf:l ;;qg mh;yhbjide 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 itsyww) xhh s 7ad+kmqqh+ 5wu+i;( e7l5h acceleration decreases.

  A baseball player hits a foul ball str ;x 2f86kdr1lrc 0kspiaight up into the air. It leaves the bat with a speis x01 cl rkrp2fk;8d6ed 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, 2-rww t*heal9k:* y ehwhat is happening to its acceleration, how does it change if air friction is ignoredye 9kr2h *he:w-lt*aw?

  As a freely falling object speeds up, what is happening to its acceleraz vuru:faxao m( xw5yy /y3722tion, how does it change if air frm fay7(uuy2a 53z rx xov:w/y2iction CAN NOT be ignored?

  An object that is thrown vertically upward w)xg f8s f5dhmy9b. gq.ill return to its original position with the same speed as it had initially if air resistance is neglih89 5fqd.x gs.fg)myb gible. If air resistance is appreciable, how will this result be altered?

  An object can have zero velocity and nonzero acceleration at the same time. zrs/,q9ic )fht jlvw99 6/ibd

  An object can have nonzero velocity and zero acceleratioagy mrn )wf4;4n at the same time.

  An elevator moving from the second floor to the fifth floor macf(fcg7xfb1id *q532u i7zk fking no stops along the way has zero acceleration all the timeqcc*i1(7 fxu2 3fdik7fgf5 bz .

  A rolling ball moves from ic )3f ,yrug;r23 aubx$x_1=2.0 \mathrm{~cm}$ to $x_2=-6.3 \mathrm{~cm}$ during the time from $t_1=1.8 \mathrm{~s}$ to $t_2=6.0 \mathrm{~s}$. What is its average velocity?  (数值)  $cm/s$ (only fill in numerical value please)

  A particle at $t_1=-4.3 \mathrm{~s}$ is at $x_1=2.3 \mathrm{~cm}$ and at $t_2=3.5 \mathrm{~s}$ is at $x_2=8.1 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete laps around a quart *okd;zx 4h)qeer-mile ($1 \; mile = 1609 \; m$) 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 traine3 gjod54yt g(pcgz r qo (/g6d5xk:)ktr in a straight line, moving 106 m away in 12.4 s. It then turns abruptly and gallops halfdgxdj/ygkz g((gt:5k5)trco3 46q op way back in 4.7 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 from3-nis-pjdx7 jcfy 5)w $11 \; m/s$ to $25 \; m/s$ in 5.9 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 fro2 zup9idaz z33/2 tnmvm $19 \; m/s$ 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 oz; 36goaiuigf25yk -w f $30 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $2.4 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinter can burst out of the blocks to esy /g g :n934jzn,bxf4hr0iq gasentially top speed abou43bjz094rhy f:qnnxiga/ g, gt $11.1 \; m/s$ in the first 11.4 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 unifory+ qh;wd.o2) h2vfp 1vuk1zdxmly from a speed of $17 \; m/s$ to rest in 5.08 s. How far did it travel in that time?  (数值)  $m$

  In coming to a stop, a car leaves skid marks 92 m long on the hig6mh)v)wmylxq o8f(pgy ,t0w 7j0;g athway. Assuming a deceleration,(o)w p a60ytqh)jw7vtmgx 0 yg ;mlf8 of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck 9:r4 s0sqofuz orjg6 in;:7kq 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 hd5ny oyap+yf07i,/kfb , *rf min. After exactly 27.0 min, there are still 1100 mbd/nh7*y5ip r,yaf +,yff ko0 to go. The runner must then accelerate at $0.20 \; m/s^2$ for how many seconds in order to achieve the desired time?    $s$