Suppose that an object travels frozabp. kxmu)+x/g)3z cx th-;bm one point in space to another. Make a comparison between the displacem3) .-b pu/k)xz x;cxzhba +tgment and the distance traveled.

  When is the average velocity of an object equal to the pzg pi 9;+bw 4hfqtk+(instantaneous velocity?

  A new car manufacturer advs u)e j)3n :b9vzziv+wertises that their car can go "from zero to sixty in 8 s". This is a deuis n3) j vwz:+)vzb9escription of

  An object moving in the +x axis experiences an acceleration c w4ofzp-dk/t.9qym ,1u8csf of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to the East (+x 23knti zo9dp9o: drv: b5+ azzdirection) begins to slow down as it approaches a traffic light. Make a statement concerning its acceleratio zo:d253rdz9nbki: pto +9avz n.

  Suppose that a car traveling to the West (-x direction) begins to s(xxpre 449kyh )b/le udm;1iolow down as it approaches a traffic light. Make a statement concerning its 9yp id()1e4rm;xkxe uhb 4ol/ acceleration.

  Suppose that an object is moving with a constant ve*yxi8k98lsxu zx(7 r xrp.l1ilocity. Make a statement concerning rzrp 881 x(7isxixly.*kux9 lits acceleration.

  If the velocity of an obzfzb6fbkm1 xkir -2.5, 2 izlaject is zero, does it mean that the acceleration is zero -21.52fkr6 zibx,zzba lmfk i? Support your answer with an example.

  Can an object's velocity change direction when its acceleration is constantbd,dkom0 dlmc ; .2th0? Support your 0mk.,dlb 0o cdd;h 2tmanswer with an example.

  Suppose that an object is moving ww p)p)wl)m+o hith constant acceleration. Make a statement concerningw w)lp )o)+hpm its motion with respect to time.

  Can an object have incq w/k;19r+pwzd s jwhsv6z:1hreasing speed while its acceleration is decreasing? Support your answer withqsjww 1wdpvh /z ;6k1:+ zh9rs an example.

  Suppose a can, afterd+.,p( v 9e7:)olhqt fys xn,8j xtmlf an initial kick, moves up along a smooth hill of ice. Make a ss,dv.:+ m9 hleyfptjtxf(on ,)7x l 8qtatement concerning its acceleration.

  Under what condition is averaigryoq9xt gl9m0k6m.qn)*((q; aue 06 ncrajge velocity equal to the average of the object's initial and final v0x*qnm6 9i(rm6 )j(r g.otyn l0a9uaq;g ckqeelocity?

  Objects A and B both start at rest. Th59 zc 7kuywh9iss204 qs,prahey both accelerate at the same rate. However, object A accelerates for twice us4027qkz ,p5cirhyas s 9wh 9the 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 j,- :ifpvjx*e*wq kp7 the same rate. However, object A accelerates for twice the time as object B. What is the distance traveled by object f*7pxk,p-ei: vwqjj*A compared to that of object B?

  When an object is released from rest and falls in the absenci; k c al5*nwenxp,k or42.lz6e of friction, which of the following isx65kl.w 4i ronkc ne;a2z, *lp true concerning its motion?

  When an object is released from reifj:3qt2oqgvpi 0p vf 6r-q541+mg gzst and falls in the absence of friction, which of the following is true concerningq-f f64o p:vp31qgv jtgi0 2+ ziqm5rg its motion?

  Suppose a ball is thrown straight up. Make a stateq z ;3mcq-*kf a+p5 kfg0xwtl(ment about the velocity and the acceleration when the b;mp l+gq- 0zkffkcatwq 3*(x5all reaches the highest point.

  Suppose a ball is thrown xbhm2d ;i; +hcx wz/1kf4i0ac straight up. What is its acceleration just before it reaches0di h aixwzh/cx f;21c+4mkb ; its highest point?

  Suppose a ball is thrown straight up, reaches ajtih2gp ,)y ;e maximum height, then falls to its initial height. Make a statement about tpi ,h;tej2g )yhe direction of the velocity and acceleration as the ball is going up.

  A ball is thrown straight j9lxno5g;w + zup, reaches a maximum height, then falls to its initial height. Make a statement about the direction of the velocity and acceleratio zn x5ow9+ljg;n as the ball is coming down.

  Suppose a ball is thrown downward in the absenc16cndv/ w9s lee of air resistance. Make a statement concerning its accel/n6 9lvesd1wc eration.

  Suppose a skydiver jumpspq g l9sf4 il6q)x)f1d from a high-flying plane. What is her acceleration when she she re1 ) q)i4s9plf6 fdxlgqaches terminal velocity?

  A ball is thrown verticallypu ytps2 c13;y( ra8rm upward with a speed v. An identical second ball is thrown upward with a speed 2v (twice as fastyrp81m ap2t3cusr ;( y). 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 building. One second later, ball B is drspf2dezx p/h3 -bwws 6g1w+v2 opped fx d 22ps-6ph g1wzww/b+vef3srom the same building. As time progresses, the distance between them

  Ball A is dropped from the top of a building5buwjgpy2ep b bdec ,g9.x 45*. One second later, ball B is dropped from the same building. As time progresses, the difference in their 9gg,dw bb4eb. y *j5ppx2c5eu speeds

  Two objects are thrown from the top of a tall building. One is thr,a x9 ho a/g-phgup1x8vit -x9own up, and the other is thrown down, both with the same initial speed. What89/1o uvi ggxa-9 x a,tppx-hh are their speeds when they hit the street?

  A brick is dropped from the top of a building. A second bwthatr2ah , ez5, s1g1kh 1xi1rick is thrown straight down from the shitkz,r2 s,awat1 1e gh1h5x 1ame building. They are released at the same time. Neglect air resistance. Compare the accelerations of the two bricks.

  An object is moving with constant non-zerx- ze9daef7k- o velocity in the +x axis. The position versus time graph of this obked-x 9-ef za7ject is

  An object is moving with constant non-zero acceleration in txjjq (h24e(b- h9 crkehe +x axis. The position versus time graph of this objecj e khc4hr(j(qxb2-e9t is

  An object is moving with constant non8 en;vj:uh n/n-zero velocity in the +x axis. The velocity versus tiuvj /nhn8 ;:neme graph of this object is

  An object is moving with constant non-zero acceleration in the +x axis. Thp: ny7+)1c 0rmszcegsg si4w)e velocity versus time graph of c:0 )z)yr p1 im4ncssges gw+7this object is

  The slope of a position versu u10n,3 vwt1zfrbts+ cs time graph gives

  The slope of a velocity versus time 4,4wttn*c5o)m,xws ys8 poid 5jsat2 graph gives

  The area under a curve in an acceleration versus time graph giv .*i4ltcmffdz zn8 fd, tg;u:8es

  The area under a curve in a velocity versus time gykk t)a:d98b iu7h.zu raph gives

  If the position versus time graph of an object is a horizoxju, d6pes0xdq*/o9y ntal line, the object /dojd, *ps6x0uyxe q 9is

  If the position versus time graph of tq-e b )bey0+man object is a vertical line, the object isby+mte) 0b q-e

  If the velocity versus time graph of an object is a horizontal line, the ob 4a*rzhhc4f riw14u 7iplwg; 1ject isazrwwip r c* 1 hl;fh4i1744gu

  If the velocity versus time graph of an:;d soq ;x;xxp object is a straight line making an angle of 30 degrees with the :o;sdp x;x;xq time axis, the object is

  An object moves 15.0 m north and then 11.0 m south. Find both the distance trvg)0c p9/tj dndj2v g7v1sde1aveled and thedj11g9v 2c gjvv pts7e0)n/dd magnitude of the displacement vector.

  A boat can move at 30 km/h in stillwh j+ ehh7*q5v;p kkv3 water. How long will it take to move 12 km upstream in a river flowing 6.0 km*+pjk 5 hvhqh3;wvk7e/h?

  55 mi/h is how many m/ 8cii(;49 rs,gsu zijts? (1 mi = 1609 m)

  What must be your average speed in ouh+ zw0v8 (jxerder to travel 350 km in 5.15 h?

  A runner ran the marathon (approximately 42.0 0, +0mmqi/. 9l9owwy2yx) jkbkqcrfxkm) in 2 hours and 57 min. What is the average speed of them 0q9ilw rx j0+.29c ykx/)omkbfwy,q runner in m/s?

  A car travels 90 km/h. How long does it take fxc b awrdjq-v6)-;l .oe )8dwgor it to travel 400 km?

  A ly (light year) is the distance that ligs2 xf c,0li7zeht travels in one year. The speed of light, slcf2i 0e7xz 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 p80)5o6b+d fjdi/ rdtlc6s g*fn)g jkyou look to the side for 4.0 s, how st8j dglg5ro6f c0 d*+bk))fd 6i/nj pfar do you travel during this inattentive period?

  If you run a complete loop around an outdoor track (g: tk./9jlcgw 400 m), in 100 s, your average velocit/ w9gl:gkj.tc y is

  A polar bear starts a ; u4w3ie5h9blay ujn959 mb78coeovyt the North Pole. It travels 1.0 km south, then 1.0 km east, then 1.0 km n4 wu;7io398abvelnjuc5 o 5h y9myb9eorth, 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 1.0 km south, ws6;4m0bf2 r kmopkcv-(u: mzthen 1.0 km east, then 1.0cu-24m o z;swmrbk mf:(06 kvp 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 weekend from t47jg9 owna6 d 9mdv34mvbkcf1 0y gk9school at 55 mi/h for 110 miles. It then starts to snow agnf4 7kd k1j4t by69a0cg9wm9m vov3dnd 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 100 km/h. What is the aveav suwzwf59po,j0 93xrage speed of the mot o9fap3wu0vxj s9z5,worist for this trip?

  A motorist travels for 3.0 gw(4ghd2:w ,os/pf qna0g,y ;pp9jzkh at 80 km/h and 2.0 h at 100 km/h. What is her average speed for the trip?w2kgzg9 fwp yhj/pa0q; (n ,s,:d pgo4

  An airplane travels at 300 mi/h south for 2.00 h and then at 250 mi/h north f8t82sh +,+ vwruqdrtp or 750 miles. What is the a 88v2, pdt sq+rthwr+uverage speed for the trip?

  In a 400-m relay race the anchorman (the m1mczx66i7 ymsg2a(l person 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. magi1xms (c6ly7 2m6zWhat 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 and comes to a stop afte;jjvv8 e; cfseo 9tq;(r 9 s. The car's average velocity during deceleration was 55 km/h. What was the car's deceleratt;cqvo8v ;9(s; je efjion while slowing down?

  An airplane increases its speed from 10vx ;nefe(1gd+g/ m qu30 m/s to 160 m/s, at the average rate of g1v/ neuq+(;exmf gd3$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h accelerates at the juj.ur,i.cm8m. t g(k 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 acceleratehyle*ze2f7jn6w p-o:f 9va/ t;iu e.ps 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. u9g)w2)tohxph5 9tyl6t3 yqc It then speeds up with a constant acceleration lyh h wqy359utt)o26)t gcxp 9of $2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial velocity of 6.7 m/s ex2:;od(aog f5a mv c;cl qubl3;z5gd jbl.3e:s periences a constant acceleration ofce(5;d 23jbbv .dl:lzqg;3c;: us5aogam l o f $3.5 \; m/s^2$. What is the cart's displacement during the first 4.6 s of its motion?

  A bullet moving horizontally ,ag bvvod6d:8ajw bnw(i: 1 9bop+4doto the right (+x direction) with a speed of 261 m/s strikes a sandbag and penetrates a distance of 62.81 cm. What is the average accelerawvv,:wo+9o1b :4b6 oiagdap(n8j bddtion, in $m/s^2$, of the bullet?

  A jet fighter plane is launched f9q+m ;.kl)tj3tbo;ve(g z g /ld iy/pnrom a catapult on an aircraft carrier. It reaches a speed of 42 m/s at the end of the catapu);/z(d;g tb k.nmp9/qe3y vo+i t gljllt, and this requires 2.0 s. Assuming the acceleration is constant, what is the length of the catapult?

  A car starting from rest moves w(wil g 9w.iegblyxe8yn.4 3)v0e.u o hith 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 of 200 m. What is its average z0ammxvr;g fh2s 7-+v,jge j7acceleratav exz 27s;7vr-h, gmj+g mfj0ion?

  An object starts from rest and undergoes uniform acceleration. During the8 oxocgws6f 5: first seo5w8xco gs:f6cond it travels 5.4 m. How far will it travel during the third second?

  An object is moving in a straight 3 jtg8nqm,h5u/whh 87fr)8;lm uccat line with constant acceleration. Initially it is traveling at 16 m/s. Three seconds later it is t ;nrgcm 5qu,7mf 883tu/hcw)l8hj ah traveling at 10 m/s. How far does it move during this time?

  A car starts from rest v8 y0env4; vfl5 odqt*qwk 1-oand 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 rfbn0 u/zz 57oxoad 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-ede0wf sta7r k,c .5w turns green, a car that has been waiting at the intersection starts ahead with a constant acceler, st.rk5fw0eca -wde 7ation 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 surfacua(1d 7 tiasnx70 r-m dd+.lvge of planet X where the acceleration due to gravity isu t.7 ax+-n(d10vddrmg a7sli $1.5 \; m/s^2$. What is the maximum height reached by the object?

  An object is thrown upward9nuv+o+ bfc )g with a speed of 12 m/s on the surface of planet X where the acceleration d+)+v gocf9 unbue 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 3pxd4. px aq /7nvg3vospeed of 15 m/s on the surface of planet X where the acceleration due to gra/o3q3px png7d4 .xa vvvity 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 upjdg-9b.5psk 39jwno jward with a speed of 14 m/s on the surface of planet X where the acceleration due to gravp kob-9jsdjwg3jn9 5.ity is $3.5 \; m/s^2$. What is the speed of the object after 8.0 s?

  Human reaction time is usually greater than 0.10 s. If your friend hold.utj 1iu s c*-j0broh:s a ruler between your fingers and releases it without warning, hor0sb- .huuc*ij1jo: t w 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. Wha+5o e9j. mclbe+phwv x da0jcul(w 83:t is its velocity after 3.0lo b j.:w(hcu l+9ewmx 5vd83 apce+j00 s?

  A bullet shot straight up returns to its starting point in 19 s.sjp(8(epqg ,n*o8 xtd What is the ini8 djteq*((gns p,o8xptial speed of the bullet?

  A ball is thrown straight up with a speed of 36.0 m/s. How long does it tf :5idhrl x b3equf2s)+g9t 4vake to return to its starting pointffs2:5lxe4v+ui9t qbdr3h)g?

  A ball is thrown downward from the t nofkml7)h0-q(ts qhui(2d*0 yrdb+a op of a building with an initial speed of 12 m/s. It strikes the ground after 4.5 s. How hnhua s rq-b)d m02 ky+07d(h* itqflo(igh is the building?

  A ball is thrown straight up with sr j:orrg3zk49,5r lga speed of 30 m/s. (only fill in numerical value g :r 9rz34lsgrkj,or5in 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 speed of 34.8 m/s. (pa ohzh/+.fia jid6.2 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 5 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 5.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what i vuuj7koae1hu 4hd/0/ s the velocity at t = 1.0 s?

  In Fig. below, what is the 8gp o.iumjs*w02hi7.icx y i2velocity at t = 2.5 s?

  In Fig. below, what is the velocity at t = 4.0 s)zurss -0v9fyekai*9 ?

  In Fig. below, what is the ue:*0:it k oplk8jha7velocity at t = 5.5 s?

  In Fig. below, what is the average velocity from 0 8.j:- oj xfz(m 1py m:r)kz *d0kcwiifto 4.0 s?

  In Fig. below, what is the average velocity from 0 to 6.0 bri-/t zdk/ p7s?

  In Fig. below, what is the acceleration at 1.0cpxde 1z8/5k9 o:6kqmu gmj0 a s?

  In Fig. below, what isku2,aadsar foe1izn p 2072s + the acceleration at 3.0 s?

  In Fig. below, what is the a 2q9o0 sctr q74utff:qverage acceleration from 0 to 5.0 s?

  In Fig. below, what is the average acc,1/ xlfiabq/t5 jkh f6eleration from 0 to 8.0 s?

  In Fig. below, what is thm rykzi m8fo0rf-3t +8e displacement from 0 to 8.0 s?

Does a car speedometer measure speed, velocity? {speed|velocimsv 6)etrk2 xgf.blbb;z/: c0ty}

  An object can have a varying sp ab-g :tza2p+d /op1rleed if its velocity is constant.

  The velocity of an object can be negative when its accelemg0ot6./1o+yf w u*2 o erkpxsration is positive.

  If one object has a greater speed than a second object, the first mustld ,g84 vcrxchjuz1- ( have a greate,41 rj(cc-l g8du vxhzr acceleration.

  Two cars emerge side by side from ehwyc1y 3 gftbt5+i /h-n(0voa 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 its accelebhs)k :/v grn6nmou e;cyp3+b17tel,ration decreases.

  A baseball player hits a foul ball straight up into;zu2ap7k(r/()pe kap4 qadyw the air. It leaves the bat with a speed of 42;akadep) pkar(z q uy/(p7w$120 \; km/h$. 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 hczq / 47u)d-yp sd6knpxvtca47,te w:appening to its acceleration, how does it change if air friction it z74dysk)e,d/cw - ctp 6qx4u:a p7nvs ignored?

  As a freely falling object speeds up, what is hap9sn bz xm. n0 f+v38k1du-jfnvpening to its acceleration, how does it change id9sfjkzn+.fn0x v13m-8 vbn uf air friction CAN NOT be ignored?

  An object that is thrown vertically upwaru( ,ucib)f9yfd will return to its original position with the same speed as it had initially if air resistance is negligibl,9ucuy ifb) f(e. If air resistance is appreciable, how will this result be altered?

  An object can have zero velsbr m(fi/kikgm *q,2 )ocity and nonzero acceleration at the same time.

  An object can have nonzero velocity and zero acceler kv6qcl )ir)x j,z,-jnation at the same time.

  An elevator moving from the second floor to the fifth fl9zp,bhaxg 2b0 oor making no stops along the way has zero acceleratibb zaxp2hg09,on all the time.

  A rolling ball moves .8 txtxr y76vlfrom $x_1=1.7 \mathrm{~cm}$ to $x_2=-7.2 \mathrm{~cm}$ during the time from $t_1=2.3 \mathrm{~s}$ 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 $t_1=-4.4 \mathrm{~s}$ is at $x_1=3.2 \mathrm{~cm}$ and at $t_2=3.8 \mathrm{~s}$ is at $x_2=7.9 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete laps a4 )gh ilqw9yz9round a quarter-mile ($1 \; mile = 1609 \; m$) track in a total time of 8.3 min. Calculate (a) the average speed  (数值)  $m/s$ and (b) the average velocity    $m/s$

  A horse canters away from its trainea( 2kc1.pp;fq a7ra y;tj6nvinh;6 phkwu; h-r in a straight line, moving 106 m away in 13.3 s. It then turns abruptly ; hhptn6hka;7aapu2y(n;f61 rp;k q . jvcwi-and gallops halfway 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 frd -bmuw8j9,(bo jkam,om $10 \; m/s$ to $22 \; m/s$ 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 froz 63qey5a)a3yfz; mfcy:dgk4 m $20 \; m/s$ to rest in a distance of 84 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reach7pvcf tmm40guuev 7q8 d 5:lu67avx ozz,fs: - a speed of $27 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $2.7 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinter can bursz- z8o jrrjt9*t out of the blocks to essentially top speed abouj-9jzr t8r z*ot $11.2 \; m/s$ 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 mzqn+k218q: ws- 2u nqrd 6piqa speed of $15 \; m/s$ to rest in 4.66 s. How far did it travel in that time?  (数值)  $m$

  In coming to a stop, a car lealkdvp mbiv)x y 1b+,+8 bk.7vkves skid marks 92 m long on the highway. Assuming a bklvx1 +, dv7m).p+byk8ikv b deceleration of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck going dwol-6hy 8r2w $25 \; m/s$ 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 t0*c9/5uz e adt;h *su-ilkxmshan 30.0 min. After exactly 27.0 min, there are still 1100 m to go. The ru /;s c0diztk9 s-h5*uxuemal*nner must then accelerate at $0.20 \; m/s^2$ for how many seconds in order to achieve the desired time?    $s$