Suppose that an object travels fr 5muhqj/tok (04std (som one point in space to another. Make a comparison between the displacement and the distance tro htsmu 0k5(s/t4j(qdaveled.

  When is the average velocity of an object equal to the instantaneous veloqzucx* i -f1vo9fazxft 6o3*(city?

  A new car manufacturer advertises that their car can go "from zero to sixty dgji0.ln;op( in 8 s". This is a descr g.jp l;(i0doniption of

  An object moving in the +x axis experiences an accelerationt0o)qmu+yl/zmq -gjtsa* ; c9 of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to the East (+x directno td* -,(n ur8dm;6k vhqnw*uion) begins to slow down as it approaches a traffic light. Make a stat , r6*ud(k qmd-unotnhn v*w;8ement concerning its acceleration.

  Suppose that a car traveling bpj9/a7ev;,8;faf6xdey.je h x;e3ubim:l v to the West (-x direction) begins to slow down as it approachejf6;b8b3a9. xel e/fi ev;ax;7ym:ejhdpu ,vs a traffic light. Make a statement concerning its acceleration.

  Suppose that an objeksy; rjudn8ok1o) *+*cs asc*h 2ghe* ct is moving with a constant velocity. Make a statement concehs c*g;8 k 1o+d re2 cus*kyjns**ah)orning its acceleration.

  If the velocity of an object is zero, doey 5:+bwo2 lvsas it mean that the acceleration is zero? Support your ansa2v:wl5+ y boswer with an example.

  Can an object's velocity change direction when its acceleracz61j ix5aqb 2tion is constant? Support your ans5 zjx1ac26ib qwer with an example.

  Suppose that an objec /2gsfdsz bm-/m+ c;5sczqtx 1t is moving with constant acceleration. Make a statement con bg c2fm/5z sstz-+ qdxcs1m/;cerning its motion with respect to time.

  Can an object have inux *a:sua u52ccreasing speed while its acceleration is decreasing? Support your answer with an e5u* aauu:2x csxample.

  Suppose a can, after an initial kick, moves up along a smooth hkn.z- rnygaslr2 899m ill of ice. Make a statement concerning its accelerati-9kang8 zn msl29r.ryon.

  Under what condition is average velocity equal to the average of the obdt v0zog.ve :.)qjiew*vbm g+ ,6zvb9ject's initial and final 6 gd*tegvv:b .vijz+qe,) .m zbw09ovvelocity?

  Objects A and B both start at rest. b5ea x 7jw(5nt +ve4su They both accelerate at the same rate. However, object A accelerates for twice the time as object B. What is the final speed of object A comparb(v+txje4 sn5 aeuw57ed to that of object B?

  Objects A and B both start from restsramrzl b(jh-rtf (j;bw +/d.f0 4f4g. They both accelerate at the same rate. However, object A accelerates for twice the time as object B. What is the distance traveled by object A comparejwa /4fl;( rzm+0gb .rrf-f4jth(s bdd to that of object B?

  When an object is released from rest and falls in the abse vcg3 gax n79,qpu)ow3nce of friction, which of the following is true concerning its movc)qpg xu9wn o,g73 a3tion?

  When an object is released from re (jsfo-019o08wl u d1ybllyf,sjvqx4st and falls in the absence of friction, which of ou 9q(l0-,s1 4xyyfl jf8ldob w0vjs1the following is true concerning its motion?

  Suppose a ball is thrown straigl. :3 m)9*wo fv rujw*py-tgs 0z-urh) febx,nht up. Make a statement about the velocity and the acceleration when the ball reaches the hi*z.p,y0r :s9u-vu ))xw3jgfrltmhown*b e-fghest point.

  Suppose a ball is thrown straight up. What is its acceleration just joaacfn .v1:6 before it reaches its hioj av.:6cafn1 ghest point?

  Suppose a ball is thrown straight up, z -agdaj:m1-e ae-b-p:k fqk2 reaches a maximum height, then falls to its initial height. Mak ae1-qkbe-mga-kpzd - f 2ja::e 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, then falls k3(f mrngce*t h/c4o+ to its initial height. Make a statement about the direc3cce*r+gn th( kfom/ 4tion of the velocity and acceleration as the ball is coming down.

  Suppose a ball is thrown downward i 5xw)wx /f3uj ie5mz zjn0gx8q 8r+lk(n the absence of air resistance. Make a statement 8mlj85rn)x zwkx5wg i(/+u jxzf0qe3concerning its acceleration.

  Suppose a skydiver jumps from a high-flyinqpfcj.4u/b 5wg plane. What is her acceleration when she she r bc.wp54j/q fueaches terminal velocity?

  A ball is thrown verax 715kzo sdrd1p 2b-dtically upward 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 the first ball? (x7r 2o akd-1zdpdsb1 5How many times higher does the second ball go than the first ball?)

  Ball A is dropped from the top of a buil3 lf3 7r;ii5wfjx o(10murz jkding. One second later, ball B is dropped from the same buil;jjilmf7 1r 3u5 3ir0fozkw x(ding. As time progresses, the distance between them

  Ball A is dropped from the top of a buildi,adzx-( k9sjg tv(5gong. One second later, ball B is dropped fromoa((dgv-tjg 5,k s zx9 the same building. As time progresses, the difference in their speeds

  Two objects are thrown from the:m5 -is m k9edxj*;pjp top of a tall building. One is thrown up, and the other is thrown down, both with the same initial speed. What-*p j5 dj9: mkpsxe;im are their speeds when they hit the street?

  A brick is dropped from the top of a buildiy q57 ktu9l/rfng. A second brick is thrown straight down from the same building. They are released at the same time. Neglect air resistance. Compa 5k uq7lfrty/9re the accelerations of the two bricks.

  An object is moving with constanaq3;a8op o nmnxg3k 21t non-zero velocity in the +x axis. The position versus time graph of this ob3;8 naq xkp 3gon2oa1mject is

  An object is moving with constant non-zero acceleration in the +x axis. The prk 5rzs+xr-dxy:(t *tosition versus time graph of this o5 ytrs-rxz(rdk +*t :xbject is

  An object is moving with constant non-zero velocity in the +x axizd8f- h npeuoxd7a9b 63.-oh qs. The velocity versus time graph of t 3o7hxd -9aed.bo-pquzn8 fh6his object is

  An object is moving with constant non-sm1w33yzwj+o zero acceleration in the +x axis. The velocity versus time graph of this object i3o1zywm sw+3j s

  The slope of a position versus timer: x+i)6a ywj u94ain sb)8fy7tyl el) graph gives

  The slope of a velocity versus time graph givbu y1 hb8-3 *96myp/kekc9 iz*nxim okes

  The area under a curve in an acceleration versus time grw)e sfijgwze +6 slt;f,xz ;./aph gives

  The area under a curve in a velocity veo6- s9c4 m jl.cogxfg*qp,rl-rsus time graph gives

  If the position versus time graph of an,1 p6iq spztw/ object is a horizontal line, the object i / si61ptqz,wps

  If the position versus time graph of an object is a verticalkry33clliy ( (rp/)h z line, the object isz)phyl((3kyr /r3lc i

  If the velocity versus time graph of an obf d nku*cqp)u7n3t )e8ject is a horizontal line, the object isq*)pnedu nc )8 fk3ut7

  If the velocity versus time graa7lm obz;*q zh+pbi2 7ph of an object is a straight line making an angle of 30 degrees with th 2p7haimqob 7+*; zbzle time axis, the object is

  An object moves 15.0 m north and then 1r4. 5g enxxb+hn2cq,k 1.0 m south. Find both the distance traveled and the magnitude of g .hceq2 xnrk,x5n+4bthe displacement vector.

  A boat can move at 30 k-z0f9yqh5 tiu: uc4xbm/h in still water. How long will it take to move 12 km upstream in ay -9u5chi0xtf :uq b4z river flowing 6.0 km/h?

  55 mi/h is how many m/s? (1 mi = 160c7)sq ,ma-(bu2) gv71uutoe;e xx wph9 m)

  What must be your average speed in order to travel 350 km in 5.1 hi 9w3wnwtyl4lf;; h.5 h?

  A runner ran the marathon (approximately 42.0 km) in 2 hours and 57 m -pvhbo+ +fyg 5s7j45+pcxbiu in. What is the average speed of the ru 5f ipyvj+h x7bspbc4 o-u5+g+nner in m/s?

  A car travels 90 km/h. How long does it take foyjqf3 2gne1h3.ed1ti r it to travel 400 km?

  A ly (light year) is the distance that light travels in one year. The*rgz7(m e-/pztsk7wn speed of ligpz/77w*te rzm (g-nksht 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 dxuq,-nkelwu a6, *dnv4z5q 1side for 4.0 s, how far do you travel during this inattentive nel uda*415,x,duqqz wv- k n6period?

  If you run a complete loop around aneayj -4 1a)*qkej f6ldep.c, xfrz -/u outdoor track (400 m), in 100 s, your averagez l jxkuf/, 6 .e-e*pcard1e-j4fa)q y velocity is

  A polar bear starts at the North Pole. It travels 1/u7mhde4ec v5 y5 ,ntt4y7b.klyf .t):sp duo.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 ttmey 5/y4p7l so:7c.5 tuf, dnv).ut4ykbedh rip 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 eas 68)d0brwk+t o4ubpq ft, then 1.0 km north, then 1.0 km west to return to its starting point. Thqu 4d+ )8r6tfbob0k pwis trip takes 45 min. What was the bear's average velocity?

  You are driving home on a weekend from scwd - oava0o4l3;r-)ij3c lcvq hool at 55 mi/h for 110 miles. It then sqiwr3- o ja430vcvoc-a;l dl)tarts to snow and you slow to 35 mi/h. You arrive home after driving 4 hours and 15 minutes. How far is your hometown from school?

  A motorist travels 1rze 9r.9yhf ) )zteqld 40ddj.60 km at 80 km/h and 160 km at 100 km/h. What is the average speed of the motorist for this9d) zrz.yed qljeh f.)d 0rt49 trip?

  A motorist travels for 3.0 h at 80 km/h and 2.0 h at 100 km/h. What is her av)it vt 4+ b v5wlcmqzf,sg.42perage speed fftpv2tq ivm 54cz+.4 gsb, )wlor the trip?

  An airplane travels at 300 mi/h sw mc142tg9kem03qc tx3yz5f louth for 2.00 h and then at 250 mi/h north for 750 milestwf2tml3gkyczcqm3x e 5490 1. What is the average speed for the trip?

  In a 400-m relay race the anchorman (the person who runs the last 100 m) fop ;0*;8bwpqfmtan3 xgdc d5 0sr team A can run 100 m in 9.8 s. His rival, the anchorman for team B, can cover 100fm 3t8a;x dcsqdp;w5n b0*pg0 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 k8y +3;oaj p4syzq k p)dkt6 09tkvnu6and comes to a stop after 9 s. The car's average velocity duringsdtz) q8p3 typ6a+j0kk6; 9yn4uo v kk deceleration was 40 km/h. What was the car's deceleration while slowing down?

  An airplane increases itnggwm3* 0tu i/k6ifa)s speed from 100 m/s to 160 m/s, at the average rate of 3aw*ut iggk0fi/ m6)n$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km:ko1no2rp up;ud;d/m 9x b bg6/h 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 and acceler l sf31n(xto5) yp( t8+jlsah7zrf j(. +yvljgates 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 m0,:oy f (tzkbs. It then speeds up with a constant acceleratio,of zty 0bkm(:n of $2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial velocity of 1.6 m/s experiences a constant a n5*fcbv*f pp ume97d1cceleration on5dp f*c7ve9uf 1m* pbf $2.5 \; m/s^2$. What is the cart's displacement during the first 5.5 s of its motion?

  A bullet moving horizontally to the right (+x direction) w :-r s,ji-tx: jhhzlm(ith a speed of 373 m/s strikes a sandbag and penetrates a d t(h:j,x-:msr h-zjilistance of 91.63 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. Id) aa7dxie8d) t reaches a speed of 42 m/s at the end of the catapai)dx 7dd)ae 8ult, 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 co5nmx7)c k 8d*vhk9g1u0,vo3c potcvonstant 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. What is its ave,g wlog c5x) 4g3ldt*xrage acceleration ,g c5)xg lgod4l3xw*t?

  An object starts from rest an37 (g8k*:br pnfalem fd undergoes uniform acceleration. During the first second it travels 8.3 m. How far will it travel during the third secob 7n p kmf:38fragel(*nd?

  An object is moving in a straight lc 0ar3vh9q0- elk0x tvine with 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 durivv-9 c aq0e0 xkrth0l3ng this time?

  A car starts from re3ewfg -ji /o/ist and 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 decelerat*e )vyq 38 gijct)av+se 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 thag5xlcldl 587pp*bcx* 2j 6ne p 1gbed5t has been waiting at the intersection starts ahead with a 7lp*ebc*l 5p8 dexn l cd6p15ggx5b2jconstant 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 th qp4j+ 0vvd/ cqog:h:dr*1bh qe surface of planet X where the acceleratio1gdqov0:p : qbcd* vq +4jhhr/n due to gravity is $1.5 \; m/s^2$. What is the maximum height reached by the object?

  An object is thrown gs v;fc7: gpn+upward with a speed of 12 m/s on the surface of planet X where fng +;7c :vgspthe 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 speed of 15 m/s on the surface of pla :,w mwnzvzy*kuue9zdi0 q+4)net X where the acceleration due to grz9u 0d4qmyww v )+ :u,znik*zeavity 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 surface2e4uyb6qw gu2em* 5syc1. why of planet X where the acceleration due to gravi1h62wu.w*ey4s5 g umeyby q2cty is $3.5 \; m/s^2$. What is the speed of the object after 8.0 s?

  Human reaction time is usually greater than y mlv:eq*d*n*0.10 s. If your friend holds a ruler ben*d:yql m* *vetween 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 19.6 m/s. What isa + 7,zorm* xhgbvx9 /pqc;*ju its velocity after 3.07hgo,/+xm*v* prb ua c;9zqj x0 s?

  A bullet shot straight urn;p3fylw 7 t9nb6e4hp returns to its starting point in 9 s. What is the initefy3 b97hpw ;r tnn64lial speed of the bullet?

  A ball is thrown straight up with a speed of 36.0 m/s. Howm4z7z7xyh 05 6soxpvc long does it take to retmx7zp4 syoh5zc v70 6xurn to its starting point?

  A ball is thrown downward from the tst4qqc /(27hn e p1(hwf7z4( owrn67 oreiworop of a building with an initial speed of 21 m/s. It strikes the ground after 4.4 s. How high is the building? wh( c /7(z461pnhre(n eo 74iowsf72wrqrtoq

  A ball is thrown straight up with a speed of 30 m/s.d hl ) mcjna(11p4eat7 (only fill in numerical value in the ac7n)1m1dpa he4tlj( 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 30.2 m/s;l pbf kv6pvd mt0 cv7m(x3v+4. (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 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 the velocity at t = 1.0 j1 um+ b(hug3ng uscz;i.x4 c7s?

  In Fig. below, what is the velocity at t =)wmgg220xba t rxijx zj w9588 2.5 s?

  In Fig. below, what iev* 9 1upv4u8e nwgmo7s the velocity at t = 4.0 s?

  In Fig. below, what is the velocity atgts6f u00vn wy8 . s-ipxoq.,p t = 5.5 s?

  In Fig. below, what is the average velocity from 0;nr9(ta;e6kv,v*qh kx i .ij l to 4.0 s?

  In Fig. below, what is the average velocity from 0 to /n)*sq(k ;d/ndg;ck g fxlsp26.0 s?

  In Fig. below, what is the accelerax(l e47qvy7 sxtion at 1.0 s?

  In Fig. below, what is thax:hp,*+ jdt qe acceleration at 3.0 s?

  In Fig. below, what is the averageqslfn: pk+.e8 acceleration from 0 to 5.0 s?

  In Fig. below, what is the average acceleration from 0 to 8.0 2ch(/jki 9qwv9p8 sbt s?

  In Fig. below, what is the dispf,;i7xepf 3 uulacement from 0 to 8.0 s?

Does a car speedometer measure speed, velocity? {speed|ve2.0dypy3qx k elocity}

  An object can have a varying speed if its velsde2lofyl**3q /kg/,sr+ in2 j7szy eocity is constant.

  The velocity of an object can be negative when its acceleration is px,t:3p8 eppxy ositive.

  If one object has a greater speed than a senz h) n-ikjlmyg(.65 vcond object, the first must have a greate.ymi(5n)jg6 z-ln kvhr acceleration.

  Two cars emerge side by side from a tunnel. Car A is traveling with a sq jdc/ 1:b*w0)k wd+sftl )n*uy3oatu peed 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 ity0;q6r0 lpkycgu/ i0ns acceleration decreases.

  A baseball player hits a foul ball straight up into3vy+szm2w4 b c the air. It leaves the bat witw4 yzm 2b3csv+h a 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, rz:7zgf,k 0dowhat is happening to its acceleration, how does it zo:dr07fzkg, change if air friction is ignored?

  As a freely falling object speeds up, ru-r( o0j9m 7p*5enm tpx:be0gux)xo what is happening to its acceleration, how does it change if air friction po-r9 05xb 0(xereomj)*utun gpx :7mCAN NOT be ignored?

  An object that is thrown vertically upward will return to its0gjuvym:y)ptdb(h5pv: un:* dlt4 2a 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 alterey:v (0uda*m:g25 ybtut jphlnd:)vp4 d?

  An object can have zero velocity and nonzero6 pj6dvab4ez6 acceleration at the same time.

  An object can have nonzero vel1/s v( d1h(yy;of:fnn u9founocity and zero acceleration at the same time.

  An elevator moving from the second floor to the bt9r/tb65a xyfifth floor making no stops along the way has zero acceleration all they6/abbx5t r9 t time.

  A rolling ball moves f4l wqzvl t k8.d)8gy caf4q)f0rom $x_1=2.6 \mathrm{~cm}$ to $x_2=-6.6 \mathrm{~cm}$ during the time from $t_1=1.0 \mathrm{~s}$ to $t_2=5.8 \mathrm{~s}$. 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 $x_1=3.0 \mathrm{~cm}$ and at $t_2=3.5 \mathrm{~s}$ is at $x_2=8.2 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight completeq.6q+/v lt7fq:kf/p +n itakt laps around a quarter-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 itst.(jb3z6v vkfn(zo g; trainer in a straight line, moving 97 m away in 11.2 s. It then turns abruptly and gallops halfway back in 4.6 s. Calculate (a) its average s6g (( ozjb tfn;kv.3zvpeed  (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 qowk9bq6s0y5i k2.y q$12 \; m/s$ 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 frocwfud,+l l94t, ojm3vm $21 \; m/s$ to rest in a distance of 76 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reach wn1uznech9us 9j; m07a speed of $29 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $2.8 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinter can burpq(dpjp gqv7.w;fh;m2 s ob ;(st out of the blocks to essentially top speed about opqs vp;2. wm gfb(jq; pd(;7h$10.8 \; m/s$ in the first 14.7 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 uniform -+ly xaizx*9:qbo zk3ly from a speed of $17 \; m/s$ to rest in 5.25 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 highway. Ac/8 jwquikqed 7t/jt-sr4 +6a ssuming a d ci 76/uj8sjewa-rqqt d +/4kteceleration of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck goio1 (6bq,d;a8mf xnyn zng $25 \; m/s$ 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 .wz(hq ob1u9e the 10,000-m run in less than 30.0 min. After exactly 27.0 min,buw.zo h e91q( there 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?    $s$