Suppose that an object travels fro;nxi k3 )/b5u ig0ct,jaqv (ghgqg,2im one point in space to another. Make a comparison between the dispbqa5/u3 2ig( kn)xjgih,,vtqc 0gi;glacement and the distance traveled.

  When is the average velocity of an 9puvm.19 4pmbok v*vl object equal to the instantaneous velocity?

  A new car manufacturer advertises that their car can go "from zero to sixt)tb5hq1jsg68aa fd)f/vo 0 thy in 8 1sgt0 va)doah6f / bj)5hf8qts". This is a description of

  An object moving in the +x axis fn4ep2kp11t m dj8ev +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 dowr+zb vhum46-oh+hq t1n as itq+b4mhz1 rh +t-ouhv6 approaches a traffic light. Make a statement concerning its acceleration.

  Suppose that a car traveling to the West (-x direction) begins to 6u zhs/+ rdqx*slow down as it approach*+rd / sx6zquhes a traffic light. Make a statement concerning its acceleration.

  Suppose that an object is moving with a constant velocity. Make ayvdi jfo88j/qj pmk 9ah,-gw1nm/9a 2 statement concerning its acceleraj o/j1mh kyap89iw9, nqmfg2vjd-/a 8tion.

  If the velocity of an object is zero, does iuo m9,x(5vh8i+mex/ ;k nha jgt mean that the acceleration is zero? Supi5( ke+ ;xmg 9uvha jnx,8mho/port your answer with an example.

  Can an object's velocily)b w*b :mrd;ha2qd, .aqq g/ty change direction when its acceleration is constant? Supporalwb:q2y d,) ga bh;dqm q*./rt your answer with an example.

  Suppose that an object is movvue l3+wwv/xcm3rc+.c5auutj o .,c0 ing with constant acceleration. Make a statement concerning its motion wicwue3uv t vcwcm+c5.0/u.a+ j xl, r3oth respect to time.

  Can an object have increasing speed while its acceleration is de 26/bti8i(oro, n.e o+xi dpyycreasing? Support your answyrey, o p2 (6tbini8/o.i +xoder with an example.

  Suppose a can, after an initial kick, moves up ros2w .dd31to*3 iw cialong a smooth hill of ice. Make a statement concerning its acceleration.o3ww* ri s21d.3oi dct

  Under what conditionk db8. eag;g.taurc1 + is average velocity equal to the average of the object's initial and final ab1. +g;rk .adt cge8uvelocity?

  Objects A and B both start atvxxh0q,b a3/l rest. They both accelerate at the same rate. However, object A accelera 03vxh/ql a,bxtes for twice the time as object B. What is the final speed of object A compared to that of object B?

  Objects A and B both start from rest. They both accelerate at the same rate. Hzg9p5;o l6u ejpen.8jowever, object A accelerates for twice the time as object B. What is the distance travenp ;o85j ul6p9ze.ejgled by object A compared to that of object B?

  When an object is released from rest and falls in the absence of friction, which 8zq q.m:yxu5m of the followinguz ymqq m8:x.5 is true concerning its motion?

  When an object is rev0u-aae5w y8ivg 9hj*leased from rest and falls in the absence of friction, which of t08 wvghau-yv *ji9ae5he following is true concerning its motion?

  Suppose a ball is throwku)iovfq0td ,p*/ edm0s1 ji(n straight up. Make a statement about the velocity and the acceleration when the ball reaches the highest point.pfj)0s (i *v ,imqddu t0k/e1o

  Suppose a ball is thrown straight up. What is its acceler m(fa*v9+tf xdswq;o -ation just before it reaches its highes9- (w tofq*;fvda m+xst point?

  Suppose a ball is thrown straight up, reaches a maximum height, then falls toy4hp ;ktu6olk 5 ;guh2 its initial height. Make a statement about the direcyg4u5t l;khh6 opu k2;tion of the velocity and acceleration as the ball is going up.

  A ball is thrown straight up, remj8e(;2nip*.o ge2t hc hqxc1 4sk.jyaches a maximum height, then falls to its initialei48e .1c n.hpj;*2 (xy tqmsgo2kchj height. Make a statement about the direction of the velocity and acceleration as the ball is coming down.

  Suppose a ball is thrown;n0qyz xa5:du w0y4p55rxu0rpq ot otf m:87 k downward in the absence of air resistance. Make a statemep n 0y0z8tou4557;q y wa rxr:qpod:0t5muxkfnt concerning its acceleration.

  Suppose a skydiver jumps from a high-flyi4zhtz1lijp4o8qrel. k+ . 5fl)f wqy11pez3q ng plane. What is her acceleration when she she reaches terminal velf ry+pz kltjz18hiqqef4.35 14el.1qlp )zow ocity?

  A ball is thrown vertically upward with a speed v. An identical second ball wr 8 b7m*dwjgfi4g+x1(uktm 5 is thrown upward with a speed 2v (twice as fast)d75m b4ku1gj8gwx*tfw+r m (i . What is the ratio of the maximum height of the second ball to that of the first ball? (How many times higher does the second ball go than the first ball?)

  Ball A is dropped from the top of a i x 7ed v:)g4xz6hj;rvla)w4ubuilding. One second later, ball B is dropped from the same building. :hx zruv44g) j xew;d6lv) ai7As time progresses, the distance between them

  Ball A is dropped from the top of a building. One second later, 6i-p(c azil/p z+9jyt ball B is dropped from the same building. As time progresses, the differencezz9a ipc6iplj/+(y -t in their speeds

  Two objects are thrown from the top of a *rgxtq6 1/pt mz(yu d8dnv5z6tall building. One is thrown up, and the other is thrown down, both with the same initial speed. What axdt8vtp 5ry(m6 1z/* dz uqg6nre their speeds when they hit the street?

  A brick is dropped from the top of a building. A second brick is thrown st(mgd3i0io.. w wr ;rwm7 nu5yeraight down from the same building. They are released at the same time. Neglect air resistance. Compare tmod5emyr.rw7inw0 ; w3 g.ui (he accelerations of the two bricks.

  An object is moving with constant non-zero veloci 9brzkwio58nyo ez,h/btr 483rc 5jl7 ty in the +x axis. The position versus time 8h8 z473i c rb9lb oz tr/5wn,oyke5jrgraph of this object is

  An object is moving with const3uby8vfd3d;fao ev( 0ant non-zero acceleration in the +x axis. The position versus time033ed fadyvu8fvb (; o graph of this object is

  An object is moving with conslfj7 v9 r;rv y(cfgg8/tant non-zero velocity in the +x axis. The velocity versus time graph of this object isf /79 (g8vyjr cgrlv;f

  An object is moving with constant non-zero acceleration in the +x axis. Thg3 b.uo7awsi0e velocity versus.3so uwigb7a0 time graph of this object is

  The slope of a position versus time graph g r/zpwoe;g d-s615te nives

  The slope of a velocity versus time graph givesds7 gt ;-iker nhl-2gd-+l jq.

  The area under a curve in an accelern:z 9e1 k7;xgqq q4ndzxu / vksa9*v0eation versus time graph gives

  The area under a curve in a velocity versus time grvn4u*nz6r /7cf8e4)c4r 0f loobb tliaph gives

  If the position versus time graph of an object is a hori qj3ryawc knj1w227 u)/h8qyfzontal line, the object is rhf3q jn w1 )y2uc82ja7ywqk/

  If the position versus time graph of an object is a vertical lipw0 8l:taowi(ne, the object ist8pi:wwol 0 a(

  If the velocity versus time graph of an object is a horizontbf3 l y bnc1.n2.*mxmhal line, the object is2 fxm.1*n bly m.c3hnb

  If the velocity versus time graph of y4waj.r* +qdemt7fs6 an object is a straight line making an angle of 30 degrees with the time axisjetywrs6a7*q4. +dfm , the object is

  An object moves 15.0 m north j:or :i dx21byed u.-omdy-c2 j(il*t and then 11.0 m south. Find both the distance travelbx1yre.:j ljcyioi m-d:*dt2u-2 do(ed and the magnitude of the displacement vector.

  A boat can move at 30 km/h in still water. H.inudp0i 7( xkow long will it take to move 12 km upstream in a r k.x i(dpi70univer flowing 6.0 km/h?

  55 mi/h is how many m/ e x2w)pry0*6 0qlnpltrux +s3s? (1 mi = 1609 m)

  What must be your average speed in order to travel 350bvm3 a8n) zxj 31irlbcu5g;q)+tf l6a km in 5.15 h?

  A runner ran the marathon (approximat(g+b-ci lqq;gely 42.0 km) in 2 hours and 57 min. What is the gq-q l;(bc +igaverage speed of the runner in m/s?

  A car travels 90 km/h. How lq.v .c ykw y6;7)oowtjong does it take for it to travel 400 km?

  A ly (light year) is the distance that lightzn*0 my19tke* sflp; qbcf 02y travels in one year. The speed of light iytn10e sm;b 02f9z **plqcfy ks $3.00 \times 10^8 \; m/s$. How many miles are there in a light year? (1 mi = 1609 m, 1 yr = 365 d.)

  If you are driving 72 kzlbo /;fbg g:1m/h along a straight road and you look to the side for 4.0 s, how far do you travel during this inattentive period?fz ;1g: gobbl/

  If you run a complete loop around an outdoor track (400 m), in 100 s, you9hjima r9 o*.g9tw p;6ecot/rr average velo gte;j/r99a.9*ct moporhi 6w city is

  A polar bear starts at thecvb mewwlfd 7)t-* 55co, c ek4qh/ok5 North Pole. It travels 1.0 km south, then 1.0 km east, then 1.0 km ck)to4,w/5 o wcdbf57eleqh5 c-*v kmnorth, then 1.0 km west to return to its starting point. This trip takes 45 min. What was the bear's average speed?

  A polar bear starts at the North Pole. It travels 1.uq1l :jgod , rm-p odw81:j5xq0 km south, then 1.0 km east, then 1.0 km north, thenpqum,5d 1-jlj:o gdo 81w:rq x 1.0 km west to return to its starting point. This trip takes 45 min. What was the bear's average velocity?

  You are driving home on a weekend from scho0iu4rwto hjz0a ilc 1i( /an19ol at 55 mi/h for 110 miles. It then i i0114ti o/al0hj rn9cw(azustarts 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 160 km at 80 km/h and 160 km at 1m0y lly,s+6y b00 km/h. What is the average speed of the motorist for thi0s6 +y lbyy,mls trip?

  A motorist travels for 3.0 h at 80;i)lj5 riy9r al-gcp/v;xyj - km/h and 2.0 h at 100 km/h. What is her average9ca ljjy r -xv)yr;;5i l-ig/p speed for the trip?

  An airplane travels at 300 mi/h sout/9lv aqcco) p4f rh2t p/.cr-ih for 2.00 h and then at 250 mi/h north for 750 miles. What is the apfv./rot 2pc/)ql9 charic -4verage speed for the trip?

  In a 400-m relay race the anchorman (the person who runs the lan ab.2pwhd9l :st 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 thelbhp2 dn9a .:w 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 uni 8p vq2 j;nlen;o34mtqformly and comes to a stop after 10 s. The car's average velocity during deceleration wn 3jn;v2lompqt e84q;as 31 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 the 0 lwq8pq *otq:gfk4/8rq rz.z average rate of lrq*wp8 ./0fzq g :z48korq tq$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 kmdx9dumwng;/ it i2c.3 ay. .pr/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 accelerates )0x9lnu+shx c 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 constant accgbc6te;.xo :b eleration be :go6;bc.tx of $2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial velocitdl *x. uu)vj1;0wg bely of 3.5 m/s experiences a constant acceleration of*.uv xldeljb u;)g0 1w $4.5 \; m/s^2$. What is the cart's displacement during the first 6.0 s of its motion?

  A bullet moving horic/fx kr 8b,/sszontally to the right (+x direction) with a speed of 383 m/s sr/8/ xc kbs,sftrikes a sandbag and penetrates a distance of 22.08 cm. What is the average acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is launched from a catapus 4dqf4h35n cf bd (dawneni7-t2n6. wlt on an aircraft carrier. It reaches a speed of 42 m/s at the end of the c b c .5wfdn4(qstwnhef2 dn37a di4n-6atapult, 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 constant acceleration atw 7odz+2 nple z82z3of $2.0 \; m/s^2$ 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/hq0si(itwp5db go g,+.9rl i7s in a distance of 200 m. What is its average acce. psiho9d7+qtg(5r0b l ig iw,leration?

  An object starts from rest and undergoes uniform acceleration. During the 5d(akh ) /5ibaxktn6m first second it travels 3.6 m. How far will it travel)mda i5akx(5t6/h bnk during the third second?

  An object is moving in a straight line with constant acceleration. Initially iti3v 0lm7kru n+)t-a*e30uw zwf5p xypkfe18u is traveling at 16 m/s. Three seconds later it i)pen3f pkvwi5m00uewu tz3 u aly-1xr k+7f *8s traveling at 10 m/s. How far does it move during this time?

  A car starts from rest and a);b( ol9thqv0wy vhw* ccelerates 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 rayw ;c:3 aky u(55+uv pqu2erjoad 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, a car that has been waiting at fl:;m.x0pp (z:. f(c6 blnkzlja nt*bthe intersec (:l0bzffn*(:;zm.lp jnpcb l.k6a txtion 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 speed of 12 m/s on t4gx1 1z83qrir+ .ewik- xdmzbhe surface of planet X where the acceleration due 84m 3x1 x 1gw zrzdki-rqbi+.eto gravity is $1.5 \; m/s^2$. What is the maximum height reached by the object?

  An object is thrown upward with cca70yj*f k z )/vhn0ra speed of 12 m/s on the surface of planet X where the acceleration due taf/n7zrc) ch v0j*y 0ko 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(f. 1jfuzrq3m 5zexu-/s on the surface of planet X where the accelerat u35rumef (qz.1f-z jxion 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 thp;m-hk)jo/-pzvm5 /l (uem)(daqth q e surface of planet X where the acceleratq(mp;ta(emhd -5/jmqvzuk-ho ) p /)lion 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 b07hc8vp / x0h ipju5 q5u8kssyour friend holds a ruler between your fingers and releases it without warning, how far can you expect the rus j0 p u0q/hx5v8uc8ki7psb5hler to fall before you catch it?

  A ball is thrown upward at a velocity of 19.6 m/s. What is its velocity after 3 b 4lhqy;3oq;qfu)1hx l3 )qh fu4;yxqhob1q;.00 s?

  A bullet shot straight up returns to its starting point in 8 s. Wht *ve*lcus2 +vsetj w4-l4f+3k,j rvtat is the initial speed of tt4+e fcut+r3v-ts,e* jws2vll* k4jv he bullet?

  A ball is thrown straight up wii3-7 fy+kq+j8cduxhb th a speed of 36.0 m/s. How long does it take to return to its starti 8jqfxk 3h-bu c7iy+d+ng point?

  A ball is thrown downward from the top of a building with:isa as fc 3.qz5ui/;e an initial speed of 9 m/s. It strikes the ground after.q iifa scez 35:a/s;u 8.0 s. How high is the building?

  A ball is thrown straight up with a speed of 30 m/s. (only fill i1kzf:u ( bkjb9n numerical value fkk u19bz: bj(in 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 into the air with a s v:g:zp00 cemb2 *) w9sjswjvkpeed of 37.4 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 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 = xvs s..8k.naoceobic4+ / tc1rkc 8 -i1.0 s?

  In Fig. below, what is the velocity;-n/is . t ayq)oj/hijk rot75 at t = 2.5 s?

  In Fig. below, what is the velocita3a754vvi:qcqfv6 (xzgv e1l*za a 4vy at t = 4.0 s?

  In Fig. below, what is the velocity at t = t;:.)py d5piv58vl .fdrbjv s5.5 s?

  In Fig. below, what is the average velocpc 7 60vipq jk4nub3e0ity from 0 to 4.0 s?

  In Fig. below, what is the ave76wjqei46dta. rouu4: oqi( )r u vk7hrage velocity from 0 to 6.0 s?

  In Fig. below, what is the acceleration at 1.0a (b3inf/8-dtu vep(,wkcg7z s?

  In Fig. below, what is n j(/2urut+zfe(tsx xe9 k/ /athe acceleration at 3.0 s?

  In Fig. below, what is the average acceleration from 0zaes v8 :a:(fi to 5.0 s?

  In Fig. below, what qdp / /cg7 onfb-*91 vyvmi5hwis the average acceleration from 0 to 8.0 s?

  In Fig. below, what is the displacement from 0 /):l -fobs:6 pgqr 9 qhy,wxvmto 8.0 s?

Does a car speedometer measure speed, velocity? {speed|ve 2 9ier749tozihs0qa zlocity}

  An object can have a varying speed if its velocity is l k / i.*,taj*hhwt/gscb7 5smconstant.

  The velocity of an object can be nm-)f qed4ej/g egative when its acceleration is positive.

  If one object has a greater speed than a second object, the first must have a i;x9ab56yahrtkf6qt7hn ,b9greatehxyr tbn,95k7 9a; abq66ithfr acceleration.

  Two cars emerge side by side from a tunnnjm)o/l hxc:dzi *56 eel. 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 its acceleration decr;ib72j g88xh 9xkzypckww/( meases.

  A baseball player hits a foul ball straight up into the air. It leaves the bat /wdkfl p as(*bt72r2swith a spee2 kw(btdr/a2s* 7 fpsld 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 objeceo)acku,i f05t speeds up, what is happening to its acceleration, how does it change if air ai0k c,)o5eu ffriction is ignored?

  As a freely falling object speeds up, what is ha q l8glnind /:945k3fd 2dtswsppening to its acceleration, how does it change if air frictiond:8sntfldsi w4 l9nd/q2gk3 5 CAN NOT be ignored?

  An object that is thrown vertic 8 /a-,uqdra)/qo)xmj.jmg tmally upward will return to its original position with the same speed as it had initially if air resistance is negligible. If air resistance is appreciable, how m/uq8gt)a.- / rj)mqdjaxom ,will this result be altered?

  An object can have zero vel vkkev ns5:dloqy05cr;nh yyp+ 2x7)7ocity and nonzero acceleration at the same time.

  An object can have nonzero velocity and zero accelq4z 5(6jsodt. cq +izreration at the same time.

  An elevator moving from the second f +x+1j y xqgu1hzh dxc01u1p(fh5xq4 aloor to the fifth floor making no stops along the way hq yhq chfg d1j4+x0 5x1ha1xzpu +x(1uas zero acceleration all the time.

  A rolling ball moves q1t w z)qd(w,mfrom $x_1=1.7 \mathrm{~cm}$ to $x_2=-4.3 \mathrm{~cm}$ during the time from $t_1=1.1 \mathrm{~s}$ to $t_2=5.2 \mathrm{~s}$. 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 $x_1=2.6 \mathrm{~cm}$ and at $t_2=3.4 \mathrm{~s}$ is at $x_2=8.2 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete laps z+t)t7i- prjxv 5lo:daround a quarter-mile ($1 \; mile = 1609 \; m$) track in a total time of 10.7 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, moving 97 m away 1d27tn2jz 6w;uyf3 mi g6hhiwin 9.1 s. It then turns abruptly and gallops halfway back in 4.5 s.f2dhyti6 7w3;z1 2w i n6mgjuh 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 from fkksdyapn4/ks:b (-2 $12 \; m/s$ to $23 \; m/s$ in 4.2 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 fro*dqco7a( x 3ep3 zokskc7a/8duj68xwm $19 \; m/s$ 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 o4g w/g)h u n4(u xfk17cob3fghf $27 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $2.6 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinter can burst out of the blocks to essentially top s h; fx)kx:-rf; rx,mewpeed abou f-xm):,;xw fhx ker;rt $11.5 \; m/s$ 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 unik2x)tidppn/eaq9 iv 3 i,6n6zformly from a speed of $21 \; m/s$ to rest in 5.13 s. How far did it travel in that time?  (数值)  $m$

  In coming to a stop, a car leaves skid marks 92 m(p0lb : b88v:0ce jli c-jdmwv long on the highway. Assuming a decdccbl-(v ejpwjv0 8bl 80:i:meleration of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck*pu:;yls rnkwp-p86i/2 dg eh 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 compleq 1(jd-xob;7 s+dwdhr c,9uac te the 10,000-m run in less than 30.0 min. After exactly 27.0 min, there are still 1100 m to go. The runner must ,sh(9;d c+-r7 a1qdb doxw jcuthen accelerate at $0.20 \; m/s^2$ for how many seconds in order to achieve the desired time?    $s$

  A stone is dropped from the top of a clxzr eb r 6uescm1c)*q3l7:an,iff. It hits the ground below after $2.96 \; s$. How high is the cliff?  (数值)  $m$