Suppose that an object travels from one point in space to another. su (1be7nc;beakw:vrf/ ,xc( Make a comparison between the displacement and the distanck:ewf1(;r/s(,bvu cnxbac e7e traveled.

  When is the average velocity of an object equal to the instantaneous velo zby d -e68+dig:ls4yvcity?

  A new car manufacturer advertises that their car can go "from zero to sixty in ngsn4 fs-1/:vfz/ nle8 s". This is a des1nfge-vnl/4nzs : /f scription of

  An object moving in the +x axis experiences an accelerata tif;5v wofhjibq 64k*. 2(hxion of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to the East (+x dircuis8*h 70)*lpexwomection) begins to slow down as it approaches a trafeh*)u *0io cxslm7p w8fic light. Make a statement concerning its acceleration.

  Suppose that a car traveling to the West (-x dire+ fz25l rn+pt)-xqyak ction) begins to slow down as it approaches a traffic light. Make a statement concerning its accelern2 ) arp+fz+lt5y-qk xation.

  Suppose that an object is moving with a constant velocity. Make a l*z ga h*c/ )/fm+3xjwodpr 2ystatement concerning its acceleratio/a/w)gl h +orzxp2cd3m* y fj*n.

  If the velocity of an object is zero, does it mean that the acceleration is zer9.nsq( ey1hk;)pbmyx ahmf9+o? Support your answe yhb+snh(km9 m yx91q)p af;.er with an example.

  Can an object's velocity change direction when its acceleration is constant? lauhwdr+s 4-j /nw i*/Support y4+-h/nai * wu/sd wrjlour answer with an example.

  Suppose that an object is moving with constant acceleration. Make a stateme oseoz5u+ +t8p af)nv0nt c5onf av so)++ez8ut0p oncerning its motion with respect to time.

  Can an object have increasing uyd4cv67f h1 qhgd+t;speed while its acceleration is decreasing? Support your answer with an examp7h1+tvf qgh ;4u dd6ycle.

  Suppose a can, after an initial kick, moves up alonnmynl 0tk 69/svxmn7-g a smooth hill of ice. Make a statnnlm /0 yxntvk9ms-76ement concerning its acceleration.

  Under what condition is average velocity equal to the average of thf fl -04:ythdwv(y 7qse object's initial and final velocity:-7 qdv sfyhlft(40wy?

  Objects A and B both start at rest. They both accelerate at the same ratomz)v exk1;c2e. However, object A accelerate1e2)kc; mx ozvs 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 tocb*1fr 60xil kopu )0 y6:eob 5iizm5he same rate. However, object A accelerates for twice the time as object B. What is the distance t uim f5pc0:xy*i5o 6b1) ozb 0iole6krraveled by object A compared to that of object B?

  When an object is released from rest and falls in the aefchpwu yo5ofh -:sc1iv crp2w9 95 .-bsence of friction, which of the following is true concerning its mo5ph - -1powco:csyv eff.rc29h95uw ition?

  When an object is released from rest and falls in the absence 2*u) e r.pipw4,q9phhh+tyb 0uutui5of friction, which of the following is t,pyu950bp r.+tqhe uh4u)hi*2w ut pi rue concerning its motion?

  Suppose a ball is thrown straight up. Mak0ydq )* qti0e1qmcgwr6*-ml bh) fzx 5e a statement about the velocity and the acceleratio*w d-qq zm) c g5yxt6imhb0e)qr1fl*0 n when the ball reaches the highest point.

  Suppose a ball is thrown straight up. What is its acceleration just before imp9sh/b. xfe7 t reaches its hi.7pfe9mh/ bs xghest point?

  Suppose a ball is thrown straight up, reaches a maximum hengxs)up p)cl:ov. qv,:* mh +; jxszv6ight, then falls to its initial height. Make a statement about the directi6np+ *cms v;sv :hj,uxlq: )v .)xopzgon of the velocity and acceleration as the ball is going up.

  A ball is thrown straight up, reaches a maximum height, then f2 5gaaf87.wumfyo, n),lbjtm 6oj+rzalls to its initial height. Make a statement about the direction of the velocity and acceleration as the ball is 5 a6jg a2ofb ml twf7y),+zmn.r,8ou jcoming down.

  Suppose a ball is thrown downward in)hlqggb :d1l) the absence of air resistance. Make a statement concerni1:gl )b lq)hgdng its acceleration.

  Suppose a skydiver jumps from a high-flyinv4gsvsvkdaf 7 k6/i8v a,x29 /hwmo0ng plane. What is her acceleration when she she reaches 2 , 0 imxaov 6s7/h8dsv9nvk4vwgfa/kterminal velocity?

  A ball is thrown vertically upward with a speb9 qd qxii,6i(ed 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 ballxqi d6iq,( 9ib to that of the first ball? (How many times higher does the second ball go than the first ball?)

  Ball A is dropped fry3ft+ta53 xpy om the top of a building. One second later, ball B is dropped from the same building. 3+yp 35xyttfa As time progresses, the distance between them

  Ball A is dropped from the top of a building. One seg9/:a3 ax bioicond later, ball B is dropped from the same building. As time progresses, the diffe9 :aibia/gox3 rence in their speeds

  Two objects are thrown from the top of a tall building. One is thrown up, an qww: r i:26 u9wl5zc.a.bgfmtd the other is thrown down, both with the same initial speed. What are t6 iwt2:wu:qbm .5.fagwcl r9 zheir speeds when they hit the street?

  A brick is dropped from the top of a building. A secl x+ho12uj) ic3 /jignond brick is thrown straight down from the same building. They are released at the same uc2iij)hj/g 1+lox n3time. Neglect air resistance. Compare the accelerations of the two bricks.

  An object is moving with constant non-zero velocity in the +x axdloh1 jk)- i*j(3 stfpis. The position vef1-hj (3t)l sko dpj*irsus time graph of this object is

  An object is moving with.c spv8f)tm (x constant non-zero acceleration in the +x axis. The position versus time graph of this ) 8xvmt(s.cfpobject is

  An object is moving w9jj5b8 ig + 2(ie4tqyqzf;x edith constant non-zero velocity in the +x axis. The velocity versus time graph of this5 feti+i;j2xqy q9dbg ez 4(j8 object is

  An object is moving with constant non-zero acceleration in the +x axis j1jaz:2qr0yp. The vely zaq1:p0jj 2rocity versus time graph of this object is

  The slope of a position versus time graph gives vd1f1xd nxym1 +pj0h,

  The slope of a velocity versus timhsc09t2 mm ml4e graph gives

  The area under a curve in anb 1bovdg a/l2zf- o/r*vl1 vr7vl7q8k acceleration versus time graph gives

  The area under a curve in a velocity versus timet c1 ux 50dyqq.g)v6iq graph gives

  If the position versus time graph of an objec im3s* owhor*5t is a horizontal line, the object ir3 h*i* mosw5os

  If the position vers:j;:k n4 cc (cuwdqhm:qhxu--us time graph of an object is a vertical line, the object ism :x n(qc;c-d w:c kuhuhqj:4-

  If the velocity versi2zsxz0p h +a:g*0wn0qx,s btus time graph of an object is a horizontal line, the object ispi0qw n,gsxb *x zs00t2a+:zh

  If the velocity versus time graph of an objec38mt guk(euj kwt.(r -t is a straight line making an angle of 30 degrees wi twk((e jut8g rk3-m.uth the time axis, the object is

  An object moves 15.0 m north and then 11.0 m south. Fijiu fny oq w2k;*3/ y+foh-e(hnd both the distance traveled and the magnitude of the jy2q 3- yf /;hooiuf*( +nekwhdisplacement vector.

  A boat can move at 30 km/h in still water. How long will it take to move 12 ky5p). ya0vcj/g,6 hyf6 av arjm upstream in a river flowing 6.0 km/h?./ jya6a, p6fcvryv0 )hg5yaj

  55 mi/h is how many m/s? (1 mi = 1609 m)+ld/ c)w/f 8s yvc;ope

  What must be your average speed in order to travel 350 di*(p. fbam1fkm in 5.15 h?

  A runner ran the marathon (approximately 42.0 km) in 2 hours and 57 min. tz-v7 *kwawxo o)x-v9 What is thewx7 - 9x kzw-ov*t)avo average speed of the runner in m/s?

  A car travels 90 km/h. Ho1ugm:, w ph*6ab;v idow long does it take for it to travel 400 km?

  A ly (light year) is the distance that light travels /nhobe los3f.w6,9e5z dzaw1in one year. The speed of lightzewa6n 9w3, /sf 5o. bozehdl1 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 th.:.nn+cawllsg qw6qavp) *8 le side for 4.0 s, how far do you travel during this inattentive perillq lq:) 6+ 8w vwancsg.*ap.nod?

  If you run a complete l) g.f b.yu7w kfs8pu0ez+e/uvoop around an outdoor track (400 m), in 100 s, your average veloc)uu.kz7v gfsf+8u pee by0/.wity is

  A polar bear starts at9jlx kqa3d ev(p96r/ gycp;.wp2n (hv the North Pole. It travels 1.0 km south, then 1.0 km east, then 1.0 km north, then 1.0 km west to return to its starting point. This trik9gxdy9 qn;av. ljp3v6pc (/h2 rwep( p takes 45 min. What was the bear's average speed?

  A polar bear starts at the North Pole. It travels 1.0 kmobg7n+s wft9 + south, then 1.0 km 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 bt 7f wn+9+gobsear's average velocity?

  You are driving home on a we0c:eguy7/z+ a,y ds sqekend from school at 55 mi/h for 110 miles. It then starts 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 scgq0y/s+c yez:,ud a7shool?

  A motorist travels 160 km at mj)h/ qee-kucg f( s:)80 km/h and 160 km at 100 km/h. What is the average speed of the motogce(fq /kejh:-m u))srist for this trip?

  A motorist travels for 3.0 h at5:/w t,fn-o 7 2qzl 7aazydd.4xjhkh c 80 km/h and 2.0 h at 100 km/h. What is her average speed fo:ach wq7-n2lk /dzd7f t zxyha,jo4. 5r the trip?

  An airplane travels at 300 mi/h south for 2.00 h and then at 250 mi/h north0; 5- exon2uypy)bk qjemeq. nr(tt -0 for 750 miles. What is the average 0tpk . yqy5eoeb)n-n;tx ruqem j(20- speed for the trip?

  In a 400-m relay race the anchorman (the person who runs the lao37ox1xzo, n ast 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 tzo, ox3 1xan7ohe 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 s*wuszw7d e e4w/k93kxs*u.qctop after 9 s. The car's average velocity during deceleration was 73 km/h. What was the car's deceleration while slowiwe w/q uxwsk3kzce7* 9us4*d. ng down?

  An airplane increases its speed from 100 m/s to 160 m/s, at thec -/20 nydog :xb1ltfrh(jwksm2 tt9/ average rate of xgt-r/o0 ljbfhtkdt / 9 2wmn:2sy(c1$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/f8fdvonc 7-6)*kr xr;o0yx qth 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 accelerates4k oyk, q y rb*7u(jry)jbf;n; 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 acceleratjd+ul+7+ qrba 4zofq4ion4abd olqu f++jr 47zq+ 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 2.9 m/s experiences a conrgwizwl 5m-0,8 7yvsastant acceleration o7r smiy ,w ag8zw5-lv0f $1.0 \; m/s^2$. What is the cart's displacement during the first 8.1 s of its motion?

  A bullet moving horizontally to the right (+x direction) with a a m*q 36l 7*t0plisylmspeed of 259 m/s strikes a sandbag and penetrates a distance of 21.58 cm. What is the ave7 m a*3sltmy6l p*0iqlrage acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is launched ,v+z)kiv3v8dfg*d/p tf+ cs g from a catapult on an aircraft carrier. It reacheck vdg8v+p3ft,/)fs*vi g zd +s a speed of 42 m/s at the end of the catapult, 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 const1zo6 h;ye*jkd ant 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 d2ocozh5hwqwp0 ma/w;nqylp 1h.+:x 7istance of 200 m. What is its average accelera1h;5 poay.hwx0hocpqzw:wnqm 7+ l/ 2 tion?

  An object starts from rest and undergoes uniform accel;v6. ni9.gn eo i l3qlpzp45kmeration. During the first second it travels 7.7 m. How far will it 9no5mplq 4zgk;.. i6nv e3 ipltravel during the third second?

  An object is moving in a straight line gt:ns.x2 ul)*ang. yj,+g xq igg2jp5 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 durg.ngx*l2:qx5naj. y,g t2gi sjgup +) ing this time?

  A car starts from rest and q:+bla ln.zt-bp.; qaaccelerates 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 roa79kgl u t 8ae;st(-t-u, vjcncd 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 trafe26(. i( 4k xbcqtan6m2lfvksfic light turns green, a car that has been waiting at the int fsn mc 4(a6ql2(k.vkb x2et6iersection 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 speedpfyix 0q,;94g*3 bioy hkngsl9h - v0i of 12 m/s on the surface of planet X where the acceleration due to gravitykn 0* -9q,p xhyio fiy3lsv ;49igb0gh 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 Xkie/o.pr4xn4wt uuo0xv,1 8dpo +c b/ where the acceleration due to gravit/x4dxtppvb o1ku 84/e,onroc. w+iu0y 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 wf pc29twhv dh-rxn4(e ts) ;1a speed of 15 m/s on the surface of planet X where the acceleratiod hv cptw 9t14);we2h r(s-xnfn 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 the su8m*3skfu 49ze6 joyvz rface of planet X where the acceleration due t9z3 4zysev6 * u8ofkmjo 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 your friend holds asy vnng: q. k9 vvx*1dijk0g;6 ruler between your fingers and releases it without warning, how far can you ev*v.j1ks n; g:gx k6 n0y9qvdixpect the ruler to fall before you catch it?

  A ball is thrown upward at a velocity of 19.6 m/s. What is its velocedn4je x:. k1e1mahyp 3i 2hs1ity after 3y:phhe13.es 42k 1ienj d1axm.00 s?

  A bullet shot straight up returns to its starting point in 5 s.wzr;yq.4r0jvkgfx42/ nw 4 c*nxu y :g What is the init y2: gr4zvgn/f.jxn*w4q;4c0ku y x wrial speed of the bullet?

  A ball is thrown straight up with a speed of 36.0 m/s. How long does c55si .lr7v htit take to return5 7.sl ih5rvct to its starting point?

  A ball is thrown downward from the top of a building with an initial /ylze)*edal 1 speed of 7 m/s. It strikes the ground after 5.7 s. How high iee )y/ dlla1z*s the building?

  A ball is thrown straight up with a speed of 30 m/s. (only fill in nume6 e+msiy0swt 3rical value in the bwme3ys6 i +t0slanks)
(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 strai s jk9; n1,y3hqo0nvnbght up into the air with a speed of 34.6 m/s. (use $g=10 \; m/s^2$, only fill in numerical value in the blank)
(a.) Calculate the time required for the ball to rise to its maximum height.  (数值)  $s$
(b.) Calculate the time for the ball to fall back to the height at which it was hit.  (数值)  $s$
(c.) Calculate the maximum height reached by the ball.  (数值)  $m$
(d.) Calculate the ball's speed 1 seconds later.  (数值)  $m/s$
(e.) Determine the time at which the ball pass a point 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 i+2/xrhhboos635nsb s5 dqp e8s the velocity at t = 1.0 s?

  In Fig. below, what is the velocity at t = 2.5 *z5g1i,+yfu i ,rym; c;ev2j nkccp0gs?

  In Fig. below, what 1qiq; g,1 rxvdis the velocity at t = 4.0 s?

  In Fig. below, what is thebp0k.5uex u3yconbx,oc o . r9d5e1b: velocity at t = 5.5 s?

  In Fig. below, what is : q6ohx 7 lx0c e9mcmt*un cx23ws8ao,the average velocity from 0 to 4.0 s?

  In Fig. below, what is the average :v /ue5xf)f . 5ulmgojiw*hb;velocity from 0 to 6.0 s?

  In Fig. below, what is th*tv.;yr;a* l8 fvbc-0fk jxuie acceleration at 1.0 s?

  In Fig. below, what is the acce b.qpmyp0) ys.:no wt5leration at 3.0 s?

  In Fig. below, what is the average acceleration from 0 to 5.0 sq)z:jsdd m8p/g8i m.g?

  In Fig. below, what is the average accelera u(a+, smj luw8zy. 2pgnl9.xption from 0 to 8.0 s?

  In Fig. below, what is the displacement from 0g,gx2 ncbt 7fb)3dh fg*,mymr2 lg. b; to 8.0 s?

Does a car speedometer measure speed, velocity wcb.+b: v)z um4xty)z? {speed|velocity}

  An object can have a varying spejiedhc:tp -*i:ku 6q-ed if its velocity is constant.

  The velocity of an object can be negative when its :eig; *mi9kl+ 6ohjfa8 mhch)-l+x /d7fsjiaacceleration is positive.

  If one object has a grzydlv1;rs90e eater speed than a second object, the first must have a greater accelerati 1ydr90sl;ez von.

  Two cars emerge side by side from a tunnel. Car A is traveling with a spee mdq :;2(iwb5 aez+5ly5fkcv.3yt1 gry4 kqifd 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 increa ajt)h4s;mj,b;so (d1jm:1 ,yvsz- m .jmdoeysing in speed as its acceleration decreases.

  A baseball player hits a foul ball straigcpj kbw4,;0 hnht up into the air. It leaves the bat with a p4 njkc;,h0w bspeed 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 acb nu+c28/y- qzu+xhktj.k,x lceleration, how does it change if air friction is ignoreux.ylk8u k+, -/b2n xt+hzqcjd?

  As a freely falling obje gk;9:ft: /mx gevss7gct speeds up, what is happening to its acceleration, how does it change if air friction CAN9 /s;kgfxgg tes7::vm NOT be ignored?

  An object that is thrown vertically upward will ik ty)f;t2+4m w.* csfbzwjs9return to its original position with the same speed as it had initially if air resistance is negligible. If air resistance is appreciable, how wi)y *t+bsft kf s;9wimcw42z.jll this result be altered?

  An object can have zero velocity and nonzero abboa g cjirh;,22jc/k z.0eo- cceleration at the same time.

  An object can have nonzero velocity and zero accelera5 ,*fab rx9vl9jkpx)etion at the same time.

  An elevator moving from the second floor to the fifth floor making no st:fifccgt-d f2(9)c xh ops along the way has zero acceleration all tc(dxh ci f-c:29ft) gfhe time.

  A rolling ball moves from 4puji rgu;3dv/s .:aw avw.ywa wb0t9i t;+2i$x_1=1.8 \mathrm{~cm}$ to $x_2=-8.8 \mathrm{~cm}$ during the time from $t_1=2.0 \mathrm{~s}$ 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 $t_1=-2.9 \mathrm{~s}$ is at $x_1=2.1 \mathrm{~cm}$ and at $t_2=3.3 \mathrm{~s}$ is at $x_2=8.1 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete laps around:bcpmw u k;zt6e4ly ,ly ;*fw (1xz5to a quarter-mile ($1 \; mile = 1609 \; m$) track in a total time of 9.6 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 /*7nr8ckwh fwline, moving 87 m away in 10.2 s. It then turns abruptly and gallops halfw*kh8wnw cr 7/fay 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 fromf;o2tbx/,n yr fyf*)m $11 \; m/s$ to $25 \; m/s$ in 4.1 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 mvip-ahs g/*,m $20 \; m/s$ to rest in a distance of 73 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reach a nh-o3*0e1z)h k ktu eg4ku yq1speed of $31 \; m/s$ 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(nuq g/x ;l6ij of the blocks to essentially top speed about i (ulq/xn 6;gj$10.0 \; m/s$ in the first 12.2 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 fro n+(k:u(zr2 s 2j2ff,ollxzttm a speed of $18 \; m/s$ to rest in 5.55 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 k cr4dl 4(kva)m6yzx6 highway. Assuming a decelerkcv4r)z (y6 dx mlk6a4ation of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck goin 9994ivbu 9ywesqixo,4bfj p9g $25 \; m/s$ 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).    $m$