Suppose that an object travels from ox uw va::z8zy:ne point in space to another. Make a comparison between the displacement and the zw: 8zxuyva:: distance traveled.

  When is the average velocity of an object equal to the ij 40ipzsrlf *4nstantaneous velocity?

  A new car manufacturer advertises that thwnkc ,5 x hlj95i,dm6qeir car can go "from zero to sixty in 8 s". This is a description ow h5 xnqij,5lc9d 6km,f

  An object moving in tslkcp78f)cp1ff e(+f he +x axis 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 thwt *2z0u kfo vbi74*uo slow down as it approaches a traffic light. Make a statement concerning its acceleratiot*k z*4hwf 7bv0 u2uoin.

  Suppose that a car traveling to the West (-x direction) begins utm0)yd1r8juto slow down as it approaches a traffic light. Muyj0m8 td1r)uake a statement concerning its acceleration.

  Suppose that an object is mo; *x+oh-sr h pxemq0.fving with a constant velocity. Make a statement concer+.sqhrh;pe-x x*ofm0ning its acceleration.

  If the velocity of an object is zero, does it mean that the acceleration is t3nikpk dmu6 p24 s 5sg7y9z4szero? Suppk yi6sn79p kgmd2 p 4su4z3t5sort your answer with an example.

  Can an object's velocity change direction when its accelerat9xr p-:ef+pj( pje(kdion is constant? Support your an k(j( 9 jppd+exep-:rfswer with an example.

  Suppose that an object is moving with cons1:p m,xexj frrg/z9r- (veo ou4os(/ztant acceleration. Make a statement concerning its motion with re 9re o(fr/ x, -z supvg/zeoj4:rxo(1mspect to time.

  Can an object have increasing speed while its accelera,ivi7 lmz , hnyaw+.1ttion is decreasing? Support your answer with an exa w,z vn1yh+,iai7lm t.mple.

  Suppose a can, after an initial kick, moves k2 lhc (u(9m xwb;ieu8up along a smooth hill of ice. Make a statement concerning its accelerk(blwxm(u9 i2c8;ue hation.

  Under what condition is average velocity equal to the average of th:pfwvub5rj3ncc6srg s ( .5 1me object's initial and vw:s5 c(m5fpru r631g jcb. snfinal velocity?

  Objects A and B both start at rest. Theyu z/,am+w uwh.6y;nz y 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 compared to that +m/hwaz uwy;.z, 6n yuof object B?

  Objects A and B both start from res smq6 lh;-kz6d4r g erw8d5 vgbn:u.1pt. 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 compared to -e 1z;685. bg6nldhwq4k :usrpvdrmgthat of object B?

  When an object is released from rest and falls in the absenccivqkzx4 24.oe of friction, which of the following is true conc2c44zoxvi .qkerning its motion?

  When an object is released from rest and falls in the abs6d,.fbq dnjn m0 -u9zzence of friction, which of the following is true con.9-ubd6n jqdf0zm,nz cerning its motion?

  Suppose a ball is thz9pb+ fte6-yu rown straight up. Make a statement about the velocity and the acceleration when the ball reaches the hz+u-9 eybptf 6ighest point.

  Suppose a ball is thrown straight up. What is its acceleration just before i )bbf. :hrxjzwkh:.2mt reaches its highestr2 bw :hxhz:j.). mbfk point?

  Suppose a ball is thrown straight up,c8kmds wp 4+iukj/j*/ reaches a maximum height, then falls to its initial height. Make a statement j*wkj/dsm+/4pck8i u about the direction of the velocity and acceleration as the ball is going up.

  A ball is thrown straight up, reaches a maximum heb3vc jr-d2d n0ight, then falls to its initial height. Make a state0vjc2nrbdd 3 -ment about the direction of the velocity and acceleration as the ball is coming down.

  Suppose a ball is thrown downward in the absence of air resistance. Make a stat07)eozd,1sv0zfmk d yement concerning 0esdo 1mzkv,y d0) f7zits acceleration.

  Suppose a skydiver jumps from a,zaxthhnqif: fr000 - high-flying plane. What is her acceleration when she shez hha, - 0qix:t0ffrn0 reaches terminal velocity?

  A ball is thrown vertically upward wit8bgjnufif-nmh,9m,/go 6c ;n h 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? -j n,b, g8c;mhn gm u/ffni96o(How many times higher does the second ball go than the first ball?)

  Ball A is dropped from the top of a c+84cybxry+ u/ntw n6building. One second later, ball B is dropped from the same ycr 6bwt+x+/ yn8nu4cbuilding. As time progresses, the distance between them

  Ball A is dropped from the top of a buiy*ut.zs dak ; ;pim-,(f t1mbllding. One second later, ball B is dropped from the same building. As time progresses k,i;(.;p*1fyldsutmb zm t-a , the difference in their speeds

  Two objects are thrown from the top of a tall building. .e4/v+ c:c +ujnm*o,1y jp7rfsbmvx pOne is thrown up, and the other is thrown down, both with the same initial speed. What are their speeds when they hit the7no,mbj+ 1x*yrs v+/pu.:fevjc4p c m street?

  A brick is dropped from t+f.i+bhmu ht/he 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. Compare+f tmiu/+h.hb the accelerations of the two bricks.

  An object is moving with constant non-zero velocity in the +x axiwk:lfpw0 //njzo5 k y:s. The position versus time grow:pk /j:n/ w5ylz0 fkaph of this object is

  An object is moving with constant nwcf q7vev;2-non-zero acceleration in the +x axis. The position versus 72-enqfvw vc ;time graph of this object is

  An object is moving with c4zav xt0b(vy30wt pb*na: rp)onstant non-zero velocity in the +x axis. The velocity ver4 03 zpaa vnrywbpbt :t(vx0)*sus time graph of this object is

  An object is moving with constant non-zero acceleration in the +x axisj m)e)xurt:x(o 5u)ov. The velocity versus time graph of this uo5j mr)xxe:v) t)u(o object is

  The slope of a position verq9y2wr/b6vtp1bp+ywqo u 6)ab r; r t(sus time graph gives

  The slope of a velocity versush kvd:6nvcsmx 55fb5-n-g mw3 time graph gives

  The area under a curve in an acceleration versakh 2o-+ wngm3n:hv1w us time graph gives

  The area under a curve in a velocity ver1kct;alyx 1wm oij41 6sus time graph gives

  If the position versus time graph of an object is a horizontal line.dpf2l2r 0afs wk5( cm, the object imp5 d0 w(acksf2 .2rfls

  If the position versus time graph of an object is a vertical line, the obfs gq-0 lre:x vo2,m;4kr7frnject is-m qv:f xn40kgs2fl,oe;rr7 r

  If the velocity versus time graph of an object is a horizo5l/9ei 3krffkt rzfyr8g. :9 ,fyzkq*ntal line, the object ff .r rk9 y3/ ir,*e8z5qg :zlkf9yftkis

  If the velocity versus time g axy)sd a:s9j *lrt;jb3j2vk.raph of an object is a straight line making an angle of 30 degrees with the time a b .r xv3k*) :ytsa2jdslj;aj9xis, the object is

  An object moves 15.0 m north a eoc:l n),sdcrhg-)h5.td m3and then 11.0 m south. Find both the distance travele nc)m hrtd)hs:dac-go e,l5 3.d and the magnitude of the displacement vector.

  A boat can move at 30 km/h in still wate4qgj+ht3c0 e g))r74lswg t e myhp;e:r. How long will it take to move 12 km upstream in a river flowing 6.0 km/h?e 4w 0m;lrgh 7+ehgc) stqy:) j4tgep3

  55 mi/h is how many m/s; w9vlam9ku hq(t9 ncf2gq2(o? (1 mi = 1609 m)

  What must be your average speed in order to travel 350 km it6o6rnn54+ a wu ;pgth7j(nxcn 5.15 h?

  A runner ran the marathon (approximately e7ae2a)ob;g3 uviif/; m ,rbv42.0 km) in 2 hours and 57 min. What is theg /;vov ib7;f 3iu2)eae,bmra average speed of the runner in m/s?

  A car travels 90 km/h.ggdw ; ov4k(co5q ,ww. How long does it take for it to travel 400 km?

  A ly (light year) is the distance that light travelsl ov;lod8cdmb8ju8 ni+x4 -7 b in one year. The speed of light iso 8lomv+j dbxidn b;c 8l78u-4 $3.00 \times 10^8 \; m/s$. 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 +sq g,8mr)auf+fuse/p7r3ie side for 4.0 s, how far do you travel during u7qe+/f pess3 ,gru )ifm+8rathis inattentive period?

  If you run a complete loom g dsp (oc0ehoezr+jxr(3e5(f.3zy (p around an outdoor track (400 m), in 100 s, your average velocityhd(0o zzp+( gr5r(y3efjoescx(3em . is

  A polar bear starts at the North Pole. It travels 1.0 km south,qxh7vo-lt0 3 s then 1.0 km east, then 1.0 km north, then 1.0 km west to return to its starting point. This trip takes 45h v0-x7oqs tl3 min. What was the bear's average speed?

  A polar bear starts at the North Pole. It travels 1.0 km south, then 1.04 w*ir:; jry2wsjx s1m km east, then 1.0 km north, then 1.0 km west to return to its startiys j;srww1i*m: 4xjr2ng point. This trip takes 45 min. What was the bear's average velocity?

  You are driving home on a weekend f lrp..a:rgg *jd7cw/kea j i-1rom school at 55 mi/h for 110 miles. It then starts gwrc*pgrajk/ai1 7.e lj.d:-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 - 1 +d ulmaft2tzq)hg,if 6b-fkm at 80 km/h and 160 km at 100 km/h. What is the average speed t-df)g6f+l b,mqauhi 1-f 2ztof the motorist for this trip?

  A motorist travels for 3.0 h at 80 km/h and 2.0 h at 100 km/h. Whaoo0q g237h nkgt is her avera 03n7gq o2hokgge speed for the trip?

  An airplane travels at 300 mi/h south for 2.00 h and then at 250 mi/h nortd uv +so6tf0fb)f 63uz6*qa qkh for 750 miles. What is the averaf o6 q*ufft6aubdz3v )s0q6k +ge speed for the trip?

  In a 400-m relay race the anchorman (the person who runs thef9 (qii g86weww9*vtd 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 runneq 9dv8eg* 9ww t(6wiifr starts the final leg of the race, in order that the team A runner not lose the race?

  A car decelerates uniformlytxieuzk./ s6 n 6wnp:y8may)i/ :zt5a and comes to a stop after 9 s. The car's average velocity during deceleration was 66 km/h. What 6i6 / x/tut:yymz8sw: k.zna ni)5paewas the car's deceleration while slowing down?

  An airplane increases its speed from 100 m/s to 160 m/s, at the averk(,d,liu mz0z age rate of i,z mdu lzk0,($15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/8nc0t k il(,nzh 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 acceleray99djb6 - vs7bdzzsr m,rvd*c0(uut:5 s+jp z tes 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 constan er,;1-wihp5ynxr 1m kt acceleration,y1-xr1 e w;mrn pih5k 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 6.7 m/s experiencel:)waa vfm //at2 -fwls a constant acceleration o v/wa-2wat amffl/:)lf $4.5 \; m/s^2$. What is the cart's displacement during the first 5.7 s of its motion?

  A bullet moving horizontally to the r ez:tb6 (vc2nhight (+x direction) with a speed of 428 m/s strikes a sanvec:t(b6n2h z dbag and penetrates a distance of 39.60 cm. What is the average acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is launched from a catapult on an aircrafkx ,fo-ack.e5na69g2aqo /gi rjyh84t carrier. It reaches a speed of 42 m/s at the end of the catapult, and this requires 2.0a g9o-8a.,kh r4agfqo2 icx65k/ jnye s. Assuming the acceleration is constant, what is the length of the catapult?

  A car starting from dbxct(; 5w ygz2x55nyrest moves with 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 averagfrb80zvh9x* hk5 0/h tye nqe.e acceleratq*fhh0bykex /t0 v89 5nrezh. ion?

  An object starts from rest and undergoes uniform acceleration. During i7+ud8di7tc h the first second it travelsuih7 7d t8cd+i 9.6 m. How far will it travel during the third second?

  An object is moving in a straight line with constant acceleration. Initibuv k ( r(fws80vr6s5wccw9u* ally it is traveling at 16 m/s. Three secondsvb(cu 9urw8k 5*ss (r06cvw fw later it is traveling at 10 m/s. How far does it move during this time?

  A car starts from restqy n/e(-8hw 0vvy4hb w 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 decelerate at jcz t91dq.m1s 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 a+ cdfyd+c;:euqmhoq 9.g*wn .t the intersection st+oehc .q*fwn;. :uq+md9ycdg arts 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 speedj)yz7:jf ga sw8.3 he*w l9exe*alow8 of 12 m/s on the surface of planet X where the acceleration da y7l ljwse98):f3 wex.a o *ewhjg*z8ue 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 sh1qsugc.i:)hb w5 (psurface of planet X where the acceleration due to g(ssu1 wc:.i )hb5gp hqravity 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 t:46sd y85h ey0qbwg)+e)v nottb klc 3he surface of planet X where the acceleration bs y4 )n8o+hbt6lq5w :etecdy k )g0v3due 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 e4gljs8; 0.;+qebcrwu::u abpz0kycd 6ok o+ surface of planet X where the acceleratskl 60brqc;j. : dz ogao y+buuk+e:80e w4pc;ion 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 your frienqypfk. g j9o::d holds a ruler between your fingers and releases it wg kq:j yof:p9.ithout 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 is its velocity aduwh40. azhi9fter 34a dwh0i z.9uh.00 s?

  A bullet shot straight up returns to vf 2 lmcaa:601g )qtv-jke7oi its starting point in 9 s. What is the initial speedg)60 fm - :vj2caqkae7v1 toli of the bullet?

  A ball is thrown straight up with a speedqc .itc :7xt8o of 36.0 m/s. How long does it take to returtx 8 o.c7ic:qtn to its starting point?

  A ball is thrown downward from t dv2)*ot5clv)tcy r /hhe top of a building with an initial speed of 12 m/s. It strikes the ground after 2.7 s. How h*ctv)5tvyl/o)r hcd2 igh is the building?

  A ball is thrown straight up wi 17/ptu5 z/a zd67ymgchinx*cbc7. veth a speed of 30 m/s. (only fill in numerical value in the bl5ptz*zn.hy ud677i7/ gbmx1cac v/ec anks)
(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 straiim 41a kr9pi.bght up into the air with a speed of 48.6 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 3 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 the velocity at t = 1-,pn*h-cy4axpy0d nw .0 s?

  In Fig. below, what is the velocity at t = 5a4o/5elf cfj 2.5 s?

  In Fig. below, what is the velocity at t = 4.0 h5x ;dr ey9wm+s?

  In Fig. below, what is the e-l z bi 3msb*-5aqf:uvelocity at t = 5.5 s?

  In Fig. below, what is the averjf:r) ,qlna vlp:) 8laage velocity from 0 to 4.0 s?

  In Fig. below, what is the average velocity from 0 to m lrp0b nn h8:np60tolx96e+b 6.0 s?

  In Fig. below, what is the acceleration at.5* xs v/wsqu 8on/zl f-sauj4 1.0 s?

  In Fig. below, what itdopk u t-p+1g*b,fhp4 1:xdc s the acceleration at 3.0 s?

  In Fig. below, what is the l0b 808dim izhaverage acceleration from 0 to 5.0 s?

  In Fig. below, what is the average acceleration from 0 to )6b o 3xm:pkre8.0 s?

  In Fig. below, what is the displacement from 0 to 8.0ihu2lfx )no/ 181 phat s?

Does a car speedometer measure speed, velocity? ciao2re l5; k0{speed|velocity}

  An object can have a varying speed if its velocity i9kzp9y,ni8w5gq7ce.-hy bq os constant.

  The velocity of an object can be negative when its acceleration is positivs.i-tua5 )nd se.

  If one object has a great)uqn555 k+8egjp 2 xo9tjwgz9x/ akc her speed than a second object, the first must have a gre/aenkx59kg28+ p) 5xq w zgj5jo9chut ater acceleration.

  Two cars emerge side by side from a tunnel. Car A is travel c/t-;d ugw; svdxjz..ing 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 increa)rz*5 cj ve0rvsing in speed as its acceleration decreases.

  A baseball player hits a foul ball straight up into the air. 0z/*x yt zv/9gj.oaa3r nf3u2pwu:rg It leaves the bat wi9gz3*gtayvuaf/:/ 0r. wn3 o rz j2xputh 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, what is happeni :2hdss)4kznzn(q(p hng to its acceleration, how does it change if airh)ksp4dn:nz2hqz ( s ( friction is ignored?

  As a freely falling object speeds up, what is happeqbz9 94m:1x3 onz irfhning to its acceleration, how do z14rhmnbzo39 x :qif9es it change if air friction CAN NOT be ignored?

  An object that is thrown ve ej16;n1qzpqr rtically upward will return to its original position with the same speed as it q1n;6j e rz1qphad initially if air resistance is negligible. If air resistance is appreciable, how will this result be altered?

  An object can have zero velocity and nonzero acceleration at the same ticl,s7x6bbf .ame.

  An object can have nonhxr2h(i r 1isc.o0:zszero velocity and zero acceleration at the same time.

  An elevator moving from the second floor to the fifth floor map*( v l2e doi/wf fufkb6jn e/nan,h65a1t:0xking no stops along the way has zero acceleration0:tued1/,2 ak* (xn e/f6f nofpj aiw n65hlbv all the time.

  A rolling ball moves8ur+fgep xb nq* 7g:/bor5e0g from $x_1=2.9 \mathrm{~cm}$ to $x_2=-4.5 \mathrm{~cm}$ during the time from $t_1=1.8 \mathrm{~s}$ to $t_2=6.1 \mathrm{~s}$. What is its average velocity?  (数值)  $cm/s$ (only fill in numerical value please)

  A particle at $t_1=-4.7 \mathrm{~s}$ is at $x_1=2.1 \mathrm{~cm}$ and at $t_2=3.7 \mathrm{~s}$ is at $x_2=8.0 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete laps arounds vm55j1:z og.fwzjt- a quarter-mile ($1 \; mile = 1609 \; m$) track in a total time of 12.2 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 89 m am qti v74vx,pio+w g-/zj,fh (mv8; ycway in 10.2 s. It then turns abr ;f4jivty8imv /c(h, po+xw7m z,q v-guptly and gallops halfway back in 4.6 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 fromlzd:*li *gp obn3xx- pwezf-89-p nx2 $12 \; m/s$ to $25 \; m/s$ in 4.8 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 fro--9 .+miwc)2pkt)aszt*m d nkk c(puhm $20 \; m/s$ 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 speed o9gy4 a(-hf+aioyu 4g h0 ln;eaf $33 \; m/s$ 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 burst ofe,78cf+k znso yhs/ ec69cj( ut of the blocks to essentially top speed aboutosy(9c7 fee8j/+hfs c 6z, cnk $10.4 \; m/s$ in the first 13.9 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 a speed of;y wdafm2m u3y wq(bdc),y j23 $19 \; m/s$ to rest in 5.68 s. How far did it travel in that time?  (数值)  $m$

  In coming to a stop, a car leaves ski;17 acasfhiq s.:d7l bd marks 92 m long on the highway. Assuming a dif;7b1h 7ad:qs csal.eceleration of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck g2cbntn tn)4nn,l /qll1r 0+ hnoing $25 \; m/s$ 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 than 30.0 min. Ajuvwxua g5h oh 4;r0;3fter exactly 27.0 w0;ouh ;uhx54gvjra3 min, 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?    $s$