Suppose that an object travels from one point in space to anot/f:ewdhn(x; (ijege.her. Make a comparison bf:ie d(w.n;j/x(ge ehetween the displacement and the distance traveled.

  When is the average velocity of an object equal to the instantanezaano4 89vmwr0 9dnl8 ji0k)rous velocity?

  A new car manufacturer advertises that the 2.j*83mv j9 7acgpk,)1n ucubotf cpvir car can go "from zero to sixty in 8 s". This is 9 cjv *f8p bjup7.vgc3,12 m)acntuo ka description of

  An object moving in the +x axis experiences an a ql2kego1m 9ttv;47 wxcceleration of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to the4 a04-z*be5sg. bh2rf2 xhtwkni 5tk q East (+x direction) begins to slow down as it approaches a traffic light. Make a statement concerning its acceleration.ift khh4x2t5 q w n*r40kesb5-zb. g2a

  Suppose that a car traveling to thkp 8vdib 47xe7 pt6y(75edfm be West (-x direction) begins to slow down as it approaches a traffic light. Make t bf48pm7eex7vy6 p7dkbd i(5a statement concerning its acceleration.

  Suppose that an object is moving with a constant velocity. Ma/.jfqh3l lo tife ,cxfed. 2)4ke a statement concerning its accelc,qto fe2.ji) dxlhf3l/4.e f eration.

  If the velocity of an object is zero, does it me ytu,5.jt r350rxk (8ljckyz lx.n)s oan that the acceleration is zero? Support youo3y0rxnc8 (kr )l5.zx, u tjtkysl5j. r answer with an example.

  Can an object's velocity change direction when its acceleration is 0badtb8wp0z uuy31jlq2qi gh 01 /3 cpconstant? Support your answi jlq0b0/tzpc182yu31ghbwa03 dqpu er with an example.

  Suppose that an object is moving with c t*vdhj 3ez 0-vyiae+i0 y/t:zonstant acceleration. Make a statement concerning its motion with respect toe 0av+tije dzz-0yh:tv /*yi3 time.

  Can an object have increasing speed while its acceleration iceg mqc8gf7; 2s decreasing? Supportqg78;fme c 2gc your answer with an example.

  Suppose a can, after3otey (2ch:jgste+ 9o an initial kick, moves up along a smooth hill of ice. Make a statement concerning iteo +yhe cot9(2t3g s:js acceleration.

  Under what condition is average velocity equal to the ,8dpze6 u- imtaverage of the object's initial and 6u-etp d m,zi8final velocity?

  Objects A and B both s)zn 0hk+ g x.ma3wmcz7tart at rest. They both accelerate at the same rate. Howe7z acmwh3z)mn g .0k+xver, object A accelerates 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 stv ;mh/35fr 8ow7 h9jhi3ro swmart from rest. 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 mi9h38frs w m3ro;v/h 7oj5whcompared to that of object B?

  When an object is relea0iqg4sy3* g. -bitx lko j2ry+*a;srzsed from rest and falls in the absence of friction, which of the following qgz .2bs4t+x;s3glo*j*- ri0yikrayis true concerning its motion?

  When an object is released from rest and falls in the absence of frib-ni e2b1 ee(k.pxqyns00( z wction, which of the following is true concernisebn(iwe 2.1 k0yx-zn p qbe0(ng its motion?

  Suppose a ball is thrown straight up. Make a statemeno26mtkggc*)ke(3 r ml t about the velocity and the acceleration when the ballegc l3gor (6)mmkk*2t reaches the highest point.

  Suppose a ball is thrown straight up. What is its accelerat; jxitb (/ 5r0jjjn/kwion just before it reaches its highest point?kjb;n r 5 (i/xj/j0jtw

  Suppose a ball is thrown straight up, reaches a maximum heigh7,v t q, xlm5:ho jkcn5owq2b/t, then falls to its initial height. Make a statement about the directiont ,j5ooklbq/m2 57qh :vcw x,n of the velocity and acceleration as the ball is going up.

  A ball is thrown straight up, reaches a maximum height, then falls to t-j3 ujgod 45eits initial height. Make a statement about the direction of the velocity and acceleration as the ball io3d5gut4ej j- s coming down.

  Suppose a ball is thrown downward in the abjnbg gt71qa4vg;1 l9gsence of air resistance. Make a statement concerning its acceleratg;1vj7n bagt 4lqgg1 9ion.

  Suppose a skydiver jumps from a high-flying plane. What is her accelera;nyiu :tg06x 6gq* fpption when she she reaches terminal velocity0x gpf qgu6y;6tp*i:n?

  A ball is thrown vertically upward with a speed v. An identical second ballw* 3a 2*0s;:akcb eonp g/bvdg is thrown upward with a speed 2v (twice as fast). What is the ratio of the maximum height of the second ball to that of the first ball? (How many times higher does the second ball go than the first:ngv/*3bc0*db; waeapgk2s o ball?)

  Ball A is dropped from the top of a building. One second later, ball B is drop m.k 0l,;ma+bic0 cheu370nr4 pp emwgped from the same building. As time progresses, the distance between 0gwm7u,4b +per k3 h;. lcmma0cp n0iethem

  Ball A is dropped from the top of a building. Oneer).:yk2 jlx;m1 dbvkuv/ o1zc h6 v:w second later, ball B is dropped from the same building. As time progresses, the differenceb6 c1o) mzvkr;v2:wxvhjd/k1: .elu y in their speeds

  Two objects are thrown from the top of a tall building.iv: o(v7h vk*yahw 5o:j rv/6p One is thrown up, and the other is thrown down, both with h5jk:orio/ w vhvpa(vvy 76:*the same initial speed. What are their speeds when they hit the street?

  A brick is dropped from theyl(vs kl6qa+ , top of a building. A second brick is thrown straight down from the same building. They are released at the same time. Neglect air resistance. Cov, 6 qsyalkl+(mpare the accelerations of the two bricks.

  An object is moving with constant non-zero velocity in t +cvs -zx7ji8khe +x axis. The position versus tixk8 +7czji sv-me graph of this object is

  An object is moving with constant non-zerosl.itr 1h+:9fc: hnsc acceleration in the +x axis. The positc1nh i. :h:sf9+ slcrtion versus time graph of this object is

  An object is moving with constant nonw*ko+cv9rlc p -bd-2,,hxahr -zero velocity in the +x axis. The velocity versus time graph of hv dporc9x,hb+ a-l,-* wcrk2this object is

  An object is moving with constant non-zero acceleration in the +x axic1 5mx q:bcnczp/k4 u6s. The velocity versus x:cu kn6bq /c5pm41z ctime graph of this object is

  The slope of a position versus time v3ytm781r06kic3naf8 a)zxg mes hq5graph gives

  The slope of a velocity versus time ,m cu4k;83nntmv:,lulv 7*f vhlekp)graph gives

  The area under a curve in an ac k(yjy i/h(jnch5*t3vmu5 o- aceleration versus time graph gives

  The area under a curve in a velociv+.e) duvg.ebty versus time graph gives

  If the position versus timeq31xn lv7 aops/mf8l, graph of an object is a horizontal line, the object 3p781mlnl af/xs o,qvis

  If the position versus time graph of an object is a vertuo1 e,be ( mrtxlr+.7zical line, the object isuex( reob71 t zlm,+.r

  If the velocity versus time graph of an object is a horizontalq 6miov1w-* sj line, the object isvqi* wm oj-s16

  If the velocity versus time graph of an object is a s:vie lo/hv x.f p9+2)zpb*c.ka( pziptraight line making an angle of 30 degrees withc /ep zv xhkfiz.p9 ).opaip:b(l v*2+ the time axis, the object is

  An object moves 15.0 m north and then 11.0 m south. Fi kqa)4 awx)aqb :bye3 k8f.b6ind both the distance traveled and the magnitude of tfb ybaq )abw k:ia843 k.eq6)xhe displacement vector.

  A boat can move at 30 km/h in still water. How long i,. kcu y;zm *xaa)nl2will it take to move 12 km upstream in a river flowing ,nx;*.ma)2 yi cakzlu6.0 km/h?

  55 mi/h is how many m/s? (1 mi = 16fyqts r7oy r/)59mw2n 09 m)

  What must be your average speed in order to travel 350 km in 5l+ qwh2)y q5m2 ep9kuk.15 h?

  A runner ran the marathon (approximately 42.0 km(bvvl 5zxtbvuu , hd 8a9+yuacd5+3:x92wcpq) in 2 hours and 57 min. What is the average speed of the xabwd h+ v2uuua:v(9zpbc55c8yl3tx+d9 q,vrunner in m/s?

  A car travels 90 km/h. How long does*nv +w5c8nog2p*w i: 1p9qjun(vazlj it take for it to travel 400 km?

  A ly (light year) is the distance that light tranz*3bt3veq uonp.6 )xmn- * ilvels in one year. The speed of lighetnvx3zn 3* 6noim*-b qu.p l)t 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 straigo4/wmt645 7ot xyxqezt92d;ck dg 0i*mtz*p aht road and you look to the side for 4.0 s, how q4dzmtok twxa2t ;dy 5 zt e 7x90c/*g4o*mpi6far do you travel during this inattentive period?

  If you run a complete loop around an o( pbc.h c-+/jewkck;iutdoor track (400 m), in 100 s, your average velocity (cc- /k. pie+khwb j;cis

  A polar bear starts at the North P 3o8f 456z7k c8ipbu6j zdnytoole. 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. This trip tako87juz54t3ikbycn8 oz6 6fd pes 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 kv3c6wjcqs3 3km east, then 1.0 km north, then 1.0 km west to return to its starting point. This trip takes 45 min. What was the be33w3 qc cksvj6ar's average velocity?

  You are driving home on a weekend from school at 55 t 9g6yxvuifk70 2dt(mmi/h for 110 miles. It then starts to snow and you slow to 35 mi/h. You arrive h2u7gy i(mfx t9k60dv tome 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 100 km/h. What is z6d 9 .b29(fwk pnmkswthe averagw2s(z9 bn.k df6pmwk 9e speed of the motorist for this trip?

  A motorist travels for 3.z )ka/7g4 bg:upozpc ,0 h at 80 km/h and 2.0 h at 100 km/h. What is her average speed for tgpb4c zu) a: 7g/kpzo,he trip?

  An airplane travels at 300 mi/h south for tun7m v29la n9p mv,7v2.00 h and then at 250 mi/h north for 750 milmvv7nplun2 7t v99am,es. What is the average speed for the trip?

  In a 400-m relay race the anchorman (the personhic9hkh t06c 1wd,8eh who runs the last 100 m) for team A can run 100 m in 9.8 s. His rival, the anchorman for team B, can cover 100 m in 10.1 s. What is the largest lead the team B runner can have when the team A runner starts the final leg of the race, in order that the team A runnerhdhwh9 ch ,iekc1 860t not lose the race?

  A car decelerates uniformly and comes to a stop after 12 s. The car's avera*q*0l k 1)f2ss clecpbge velocity during deceleration wap1ccs* e*ql2kfl s0) bs 53 km/h. What was the car's deceleration while slowing down?

  An airplane increases its speed from 100 m/s to 1erak9 f+bi.lelwgn7l;t y4(.60 m/s, at the average rate of l97a(el 4 .iblketgyrwf + .;n$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h ac*2 :lmysyk +yzcelerates 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 j0;upmg6;*iktm(1ly j34gn 8dyzls y accelerates at $4.0 \; m/s^2$ for 5.0 s, then maintain that velocity for 10 s, and then decelerates at the rate of $2.0 \; m/s^2$ for 4.0 s. What is the final speed of the car?

  A car travels at 15 m/s foru ozdm*w 7-8qlim97o7vk(du i 10 s. It then speeds up with a constant acceleration l8*dud7ii( 9ok 7zvqm7- muwo 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 5.4 m/s experiences a yb:;.h01os6 8ycnw6 com ca jyconstant acceleration oj 6ywh:c6noc bcys8 1mayo.;0f $1.3 \; m/s^2$. What is the cart's displacement during the first 9.1 s of its motion?

  A bullet moving horizontally to rnkkfok kt8v8-d/2oyn 9 1dw 2the right (+x direction) with a speed of 328 m/s strikes a sandbag and penetrates a distance of 11.41 cm. What is the average acceledn1 - n8yk kd2wk29fvo/r8ot kration, in $m/s^2$, of the bullet?

  A jet fighter plane is launched from a catapult on an aj7 pkt0frn( yp ilu/-in4,7blircraft carrier. It reaches a speed of 42 m/s at the end of the catapultjn/f4( 0bpll y- 7ii,npukr7t, 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 constanth m7oro5rnl1 7 k)p lzp65c-mq 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. Whz.h 8y6ng (utct lz(/.ddl2uoat is its average acceleration? lhn(zlo2g/. t u6u(dz dty.8c

  An object starts from rest and undergos i0l9/yg( i4+cvcacl es uniform acceleration. During the first second it travels 7.9 m. s/c g4cil l9(c+vay0i How far will it travel during the third second?

  An object is moving in a straight line with constant acceleration. Initial +ft5oeu/tc p/ly it is traveling at 16 m/s. Three seconds later it is traveling at 10 m/s. How far does it move during this time5ct+ tupf /o/e?

  A car starts from rest ay *u zw2d7nuw0nd 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 rox,v o+ zen1wxm)jl d ;w ;k:tqluh/i0)ad 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 traffico 9v,5ik0wsi7; c4 oary yk2ex light turns green, a car that has been waiting at the interyvioeki 4x90kc57r ,2wsoay ;section 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 the surface of pqh cs8 py)n/m7lanet X whereh8 pmn)ys 7qc/ the acceleration 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 m/s on the surface of planet kbacy4;t;u;1l yn4tp l dj 2i.wp7 yv:X where the a1t;:yj t7vyl; w.ib 4dulc2yap k;pn4cceleration 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 spa8j8:x7ayis s dbe 6:eeed of 15 m/s on the surface of planet X where the jaeaisy:dex878s : b6acceleration 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 spabstc3a/i a80d614 qsd+w s gxeed of 14 m/s on the surface of planet X where the acceleration due to gravitca 10idw b3s64/+ts 8daagq xsy 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 frie f;ndwa2abm k m4+5udu9x7ct3nd holds a ruler betma3d2n9 wm xda t k;+ufu7b4c5ween your fingers and releases it without warning, how far can you expect the ruler to fall before you catch it?

  A ball is thrown upwld0bmq *rfy*x gp62phbd-(+ mard at a velocity of 19.6 m/s. What is its velocity after 3.0+bbd- fd*6h gp pr0my2l(xmq* 0 s?

  A bullet shot straight up returns to its starting point i 1dgkm1v3an-gnjw c2xl 2t-in ;97v jwn 11 s. What is the initial spee n gi12lgw3-v x9;mv-ntn7 ajk jw21dcd of the bullet?

  A ball is thrown straight up with a speed of 36.0 m/s. How long does it take toroavqaf6ej- f/vb-k:)m 8g;n qxlq. , return to -k6;nqv:lvr)mo /f gqfaqe,xj8ab -.its starting point?

  A ball is thrown downward from the top of a building with an initial speed of 7 ( o*r 3pasgm:xm/s. It strikes the ground aftsa x3 (g:o*pmrer 6.1 s. How high is the building?

  A ball is thrown straight up with a speed of 30 m/s. (6d6r *jxeyew3x- ,rpbonly fill in numerical value in theyb,-xeer6 x r*6dj3p w 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*ebzz:n 9 ossa1voz* 5 a speed of 49.2 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 2 seconds later.  (数值)  $m/s$
(e.) Determine the time at which the ball pass a point 10 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 10.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what is thl l8)hyxd- mhe-*j 5lje velocity at t = 1.0 s?

  In Fig. below, what is n3s;;w-zmsg 8dx1kd cthe velocity at t = 2.5 s?

  In Fig. below, what is the velocity at t = 4.vh1fv cpl 7v /spt0j0m(i6p 0e0 s?

  In Fig. below, what is the velocity mr+3h*3bj(2bmj 6q ymmgqk t8 at t = 5.5 s?

  In Fig. below, what is the average velocity lx5y;t snzeus*t ;6u)from 0 to 4.0 s?

  In Fig. below, what is tzw/n - vv-him,4;:jcc 6q xpxjhe average velocity from 0 to 6.0 s?

  In Fig. below, what is the acceei: c1rg3- j*vps/jrn leration at 1.0 s?

  In Fig. below, what is tzqx ) 0u9vvjn/4m)dpg*tkc9 v he acceleration at 3.0 s?

  In Fig. below, what is the average acceleration from 0 to ,no 5iv)an;vn 5.0 s?

  In Fig. below, what is the average ac. yaz(4,j jimkceleration from 0 to 8.0 s?

  In Fig. below, what is the displacement fr-c1ac5yyff4, oug 9bk * f)swhom 0 to 8.0 s?

Does a car speedometer measure speed, velocity? {sp3 2sg;+oh)5 tv bqvhuveed|velocity}

  An object can have a varying speed if its rao2) q*b.ptd+ldpu28e+cq k velocity is constant.

  The velocity of an object can be negative when its acceleration is positiv6vms5orqolicm9 qnm5l*rp 3nud /m qc :h6/;.e.

  If one object has a gr(2 pae/ku3gu 2x0 6z2qqugrr qeater speed than a second object, the first must have a greater acceleratiou(2q 62qrxguz que0kp 3/ar2g n.

  Two cars emerge side by side from a tunnel. Car A is travelingf l :g,p yq*9ov.(qlnbq+ 9 epks1sm;q 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 increasni,p1ax,z-ou p4) kvming in speed as its acceleration decreases.

  A baseball player hi)* 8 cl+pkrqqwts a foul ball straight up into the air. It leaves the bat with a sq)wq lp+ck r8*peed of $120 \; km/h$. In the absence of air resistance, how fast will the ball be traveling when the catcher catches it?    $km/h$ (please only fill in numerical value in the blank)

  As a freely falling object speeds up, what is happening to its accelccma*p) 4 8giuvvh9re3,;xo ieration, how does it change if av r xhcii,*opu4v38 m9e)agc;ir friction is ignored?

  As a freely falling object speedf(vac1q nyzryh)h 2v* 32fk 3zs up, what is happening to its acceleration, how does it change if air friction Cy) 3 f2z2hn3(yha1qk*frcv zv AN NOT be ignored?

  An object that is thrown vertically upward will 1 )kg4fvnrnw)return to its original position with the same speed as it had initially if air resistance is negligibl vnrf))4 k1gnwe. If air resistance is appreciable, how will this result be altered?

  An object can have zer6oc0*erdi a n+o velocity and nonzero acceleration at the same time.

  An object can have nonzero velocity and zero acceleration at the same tim w, iqc.s l :)uw1bzt51bk2wlue.

  An elevator moving from the second faxc-- uuk 7b+floor to the fifth floor making no stops along the way has zero acceleau cxu-bk+f-7ration all the time.

  A rolling ball moves 5 zwbm 4zdh*0d/lf2k vfrom $x_1=2.7 \mathrm{~cm}$ to $x_2=-4.9 \mathrm{~cm}$ during the time from $t_1=1.1 \mathrm{~s}$ 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 $t_1=-2.6 \mathrm{~s}$ is at $x_1=3.0 \mathrm{~cm}$ and at $t_2=3.2 \mathrm{~s}$ is at $x_2=8.4 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight comp,(szow3n zdwum( x q*,lete laps around a quarter-mile ($1 \; mile = 1609 \; m$) track in a total time of 6.3 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 114kpo 2ooe 0xd083wa i+n m away in 13.7 s. It then turns abruptly and gallops halfway back in 4.6 s. Calculate (a) 2 08 axnk0iodw+oe3poits 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 from2mqzy..gxwayli.9e 5 $11 \; m/s$ to $23 \; m/s$ in 5.7 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 froqk:8)t keeqgelr: 9 v4m $19 \; m/s$ to rest in a distance of 70 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reach10rn 4pm8jo/ :xdvotr a speed of $28 \; m/s$ 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 out-v:2d 2lwlh xvd.k,c2/u dmwv of the blocks to essentially top speed about v xuc h 2d2-lwmw2/:vld.,vdk$10.6 \; m/s$ in the first 10.4 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 uniformly from anv*srino7lv.e;-ln,b7a w (ih) /c5sru pz9 w speed of $16 \; m/s$ to rest in 5.21 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 thmni05 7chz -8cd :d1btalj-ske highway. Assuming a decelernd8 m1c 7hlta-sk-c0zb :j5 idation of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck u+ls r dd-gl,2r4u m kx.zm(2kgoing $25 \; m/s$ 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).    $m$