Suppose that an object travels from one point in 90hd-ms)mfl ;hab.u p space to another. Make a comparison between the displacement and the distance traveled..mp hd0;sua-lm hf )b9

  When is the average velocity of an object equal to the instantaneous v) cg8i142n5io0 amd jdlg ooe0elocity?

  A new car manufacturer advertises th d*r5 /:rxv*xovk9 .byv(hvmx)h/toy at their car can go "from zero to sixty in 8 s:/t r/vbmyk . (v*ohy)dx xrx9o5vhv *". This is a description of

  An object moving in the +x axib):k5v822z 8k g 6uvkaxquqx4/le djo s experiences an acceleration of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traxxzf 7ohy:( 9 cmtb52sveling to the East (+x direction) begins to slow down as it approaches a traffic light. Make a statement concerning its accelerf9zb 57xco t:yms( xh2ation.

  Suppose that a car traveling to ttkbp7/v n4y 9uhe West (-x direction) begins to slow down as it approaches a traffic light. Make a statement concernintu b/4pv k7y9ng its acceleration.

  Suppose that an object is moving with a constant velocity. Make a statehb0qw2 66 xwuwment concerning its acceleratioq6hwu w 0bw6x2n.

  If the velocity of an object is zero, does it g.x28z j i4cdr / fl1u)b.dfv20dg 6lvxcd-gymean that the acceleration is zero? Support your answer with a8ydflcc0ug2z..-j gx 4vg/xi 2vdrb1 d6dl)fn example.

  Can an object's velocity change direction when its accelea+ e7zgm; cvh0ration is constant? Support y+0 a ;gmzvch7eour answer with an example.

  Suppose that an object is moving with constant acceleration. m4+yk5xgkv)+dxum 5y Make a statement concerni xk5y54dvkmuxg +)+ myng its motion with respect to time.

  Can an object have increasje jj-6gc:7v 6bt ee+ning speed while its acceleration is decreasing? Suppor -76 jbcgn+jet j:ve6et your answer with an example.

  Suppose a can, after an initr u r.f7w3wgc9bttw :ybvbk- 0s-4y) cial kick, moves up along a smooth hill of ice. Make a statement concerning its acceleration.-kcy b9 ygu .f w 4w0:)-rvsrcb3b7twt

  Under what condition is average veloc;iiw1bj860 vfyy juoknv3/j 8ity equal to the average of the object's initial and final velocity?8 6fji3y;ybijv8k u1/j now v0

  Objects A and B both start at 2l5n4ep9ffqv.q- p/1 uy7vu zfc6 z ejrest. They both accelerate at the same rate. However, object A accelerates fppz4f9-lv 2 .yjcqf7/u1fv5q6 nez euor 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 r.90a7fk5fthpl g w /fiate. However, object A accelerates for twice the time as object B. What is the distance traveled by object Afilfghkf0 p/5 .7t9w a compared to that of object B?

  When an object is released from rest and fallsdtmqi (r e2s)7 in the absence of friction, which of the following is true concedimt7 2q er()srning its motion?

  When an object is released from rest and falls in t nn/dndh3d;-efgovt- +d 3 9rlhe absence of friction, which of the following is true concerning its motio h-dfn3n te 9dn3;/gd dvr-+lon?

  Suppose a ball is thrown straight up. Make a statement abog/ g0cgno/p msp/x oc/x) lq5(ut the velocity and the acceleration when the ball reachemn/lo(soppc/) //xg0 cg gq5xs the highest point.

  Suppose a ball is thrown straighttmx -ip)m- *wvna*sk, up. What is its acceleration just before it reachekv)ia -wmt,p x-s**nm s its highest point?

  Suppose a ball is thrown straight up, reaches a maximuq+9u9imxpk r,v5l tb:m height, then falls to its initial height. Make a statement about the direction of the velocity and acceleration as the ball is going up.iqm,x+l5vpbu9t9kr :

  A ball is thrown straight up, reaches a maximum ivsd 7mhp m,ct.l 88h7height, then falls to its initial height. Make a statement about the direction of t.l87vc8 phtdm ,m7i shhe velocity and acceleration as the ball is coming down.

  Suppose a ball is thrown downward in the absence of air resistance. M89mx6q pi0:f (rlsbblake a statement conm psl 8lr6(qxi0bf:b9cerning its acceleration.

  Suppose a skydiver jumps from a high-flying plane. Wh27exb e23uw1ygck5kh2h gl5 fat is her acceleration when she she reaches terminx 7 2ghcb3y k2f5l5w2uhekeg1 al velocity?

  A ball is thrown vertically upward with a speedcwdl 9teom(v )) b38uc 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? (How many times higher does the second ball go tha oum(89 3dlvcc)wbt) en the first ball?)

  Ball A is dropped fro+skx83fcab,sxx 01fmm the top of a building. One second later, ball B is dropped from the same building. As time progresses, the distance betweenx03 csxxfmf b1a ,sk+8 them

  Ball A is dropped from the top of a building. One secondk)g bjh:h2yc38kq q,u later, ball B is dropped from the same building. As time progresses, the difference ing,)2by k8uq:q h jh3ck their speeds

  Two objects are thrown from tt1 gv4 yvbu9p hp5h6et;dh;m *he top of a tall building. One is thrown up, and the other is thrown down, both with the same initial speed. What are their speeds when they hit bph4hvvttmd5*uh; y 6gp 9e;1the street?

  A brick is dropped from the top of a building. A s6+geg 8(a yeqgecond brick is thrown straight down from the same building. They are released at the same time. Neglect air resistance. Compare the accelerations of the two brickseagqy6eg+g 8(.

  An object is moving with constant non-zero velof:sgx:s. frq bhk +g/b:bj nib.* fm)3city in the +x axis. The position versus time graph of this obje.x.ksfr: jf :q+min )b:b/gfs *b3hgbct is

  An object is moving with constant non-zero acceleration in the +x axis. The pfq dj3;q8p. pl u ttau)z,)tj:osition versus time grapht) q)8;.tudpj,fjplq:3z aut of this object is

  An object is moving with cons.ldf0f5b3:j it3yartq ) iccmm4 f9c ,tant non-zero velocity in the +x axis. The velocity versus time graphf9 0c)3 5 ,4tr :i.3cdfyjiqambmftlc of this object is

  An object is moving with constant non-g) ; e s*n5n2nis9lcggzero acceleration in the +x axis. The velocity 9c)sn*2nnegi g5; glsversus time graph of this object is

  The slope of a position versus time graph g+zs-*siv qsx5ives

  The slope of a velocfiek).8ta x8 gv6;ke iity versus time graph gives

  The area under a curve in an acceleration versus time graph *vhfk/*5 vh ozgives

  The area under a curve in a velocity v56 -6flmdi0dqem rt+wersus time graph gives

  If the position versus time grapht xw14 9pybx,qc4taa) of an object is a horizontal line, the object x4ywt )pb4ct ,19axa qis

  If the position versus time graph of an object is a vertical line, the objectq mah9c-w9w1z ism9 a9zhwwc-q 1

  If the velocity versus time graph of an obr3oa; l gd7-/wh :ow*igavwq4+vcsd9ject is a horizontal line, the object igsviw/*; :v4 -ood7d+qw l wr93agcahs

  If the velocity versus time graph of an object is a straight line making an xl4 zrah3dp )l28w r3rangle of 30 dw8azlrrlp4 ) r 3h23xdegrees with the time axis, the object is

  An object moves 15.0 m north and then 11.0 m south. Find both thd3( 5 qoj:uy1;tr4pitan sqo)e distance traveled and the magni:ju 4o;)1odr 3 sqytta(niqp 5tude of the displacement vector.

  A boat can move at 30 km/h in still waa4(oolxw0,xo * sl ,8 an8gipxter. How long will it take to move 12 km upstg * (,iolx8s0lwx8p anxo,oa4 ream in a river flowing 6.0 km/h?

  55 mi/h is how many m/s? (1 mi = 1609 m) zswc19b kl+-dcp; 73bjd j/xk

  What must be your average speed in order to travel 350 kmepw9ki 8fum :;9 fym*n in 5.15 h?

  A runner ran the marathon (approximately 42.0 km) in 2 hour6q ta0z6 ala:bs and 57 min. What is the average speed of the runner in m/s?a :6ab0zl aq6t

  A car travels 90 km/h. Hoxet 5*xf0hh,4fds zj 9w long does it take for it to travel 400 km?

  A ly (light year) is the distance that light travels in one -brtln8yvl 67 year. The speed of b7-l68y v trlnlight 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 /xxrz):+ov q: m0zd qljjrql;7o(y;s you look to the side for 4.0 qvs0ojxqq lyrzl: 7z+o;;/d)mr(j:x s, how far do you travel during this inattentive period?

  If you run a complete loop around an outdoor track (400 m), im(/ *qvxy)tzm7h /c rxn 100 s, your average velocity c(vxzytqm//hm)r* x7is

  A polar bear starts at the North Pole. It travels 1.0 km south, then 1.0 km e9 ;s-bq sb-8 +dbvopvxast, then 1.0 km north, then 1.0 km west to return o xpv- ssqd8b;- bb9+vto its starting point. This trip takes 45 min. What was the bear's average speed?

  A polar bear starts at the North Pole. .aq gb oyfra.s-9 lh.6It 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 takes 45 mas6hb.qofay -9.l .rgin. What was the bear's average velocity?

  You are driving home on a weekend frw6mi yn;2lv f4 ma5-ydom 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 avy dy2n mm;a-4if 5w6lnd 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 p0t3(3 rueyp;a9q efuaverage speed of t0u3fua3e (eyt;q ppr 9he motorist for this trip?

  A motorist travels for 3.0 h at 80 km/h and 2.0 h at 100 km/h. Whas*0 o;knfc, wet is her average speed for thons;*cefk 0w, e trip?

  An airplane travels at 300 mi/h 1.aka /xtik4i south for 2.00 h and then at 250 mi/h north for 750 miles. What is the average speed for the 4ki.t/i1axk a trip?

  In a 400-m relay race the anchorman (the person who runs the last 2uixy;d f ni,9+eaxjr2(*ifu 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 thei njax9iy e22 ufi,ufx+*r;d( race, in order that the team A runner not lose the race?

  A car decelerates uniformly and comes to a stop after 12 s. Tht. f cg4ade(f0e car's average velocity during deceleration was 69 km/h. Whga(4fde0f.tc at was the car's deceleration while slowing down?

  An airplane increases its speed from 100 m/s to 160 m/s, at the ave 94gvb*87kfto v*owgq - hexv -3kww)prage rate of q 94vo3e8wwfvbwp*g- tgo kh -)x k7*v$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h accelerates at the y+ niudsobow4ckz z6:- 2lmx,s,(ok (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 res b src*8 2+cy)sjca 5s4d.irymt and 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 for 10 s. It then speeds up fnjbdx xfe85badb ,iv-gr/41 ,at8l/with a constant acceleration 8x5bgn8 r4-ad,fjte,f1/xal/v d b biof $2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial velocity s5ch38 ri+8cch9vcu iof 1.2 m/s experiences a constant acceleration o3vicr hcch8c9 8+5u sif $1.2 \; m/s^2$. What is the cart's displacement during the first 9.7 s of its motion?

  A bullet moving horizontally to the right (+x directionn5+ sf:1 ki4dwbe,exnal,r9 c ) with a speed of 287 m/s strikes a sandbag and penetrates a dfeaecn5dr, ni :l49 +x wk,1bsistance of 57.94 cm. What is the average acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane - raop; wcqmy1 s(h3.ais launched from a catapult on an aircraft carrier. It reaches 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 cwms( -qo1ca3yp rah ;.atapult?

  A car starting from rest moves with consk+emc7cwqg * d5b7(f o cm w7u)m3:b,9hvevcntant 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 itsp9dz.lyq 5n5 m average accel5m.5qdzln9 yp eration?

  An object starts from rest andcr eqhk3dfwxj5 :6 8l8 undergoes uniform acceleration. During the first second it travels 8.9 m. How far will it trc 5d6:38 w lkhjrf8qxeavel during the third second?

  An object is moving in a straight line with constant acceleration. Initially itigq 8g; *3gamc is traveling at 16 m/s. Three seconds later it is traveling at 10 m/s. How far does it move duri ggg8mci; 3*aqng this time?

  A car starts from rest and accelerates uniformlpj- uyu,oewi7i(5h aw2( +azgmxa 33 ey 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/fh s; t/aee:o road 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 k84wgyza6. cgbeen waiting at the intersection stzaygk 4g6.c8w 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 witx (q 4zrk0c): ob0;yp dazem/fh a speed of 12 m/s on the surface of planet X where the acceleratioxz4:e d)r;/pmack0 fozqb 0y(n due to gravity is $1.5 \; m/s^2$. What is the maximum height reached by the object?

  An object is thrown upwar ,lut vpb i,hnn43,6bed with a speed of 12 m/s on the surface of planet X where the accelerationntp,6ubbv,h4i l 3n e, 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 spey :5r;l2oa lsmz hv4(8su(8 kep upuz9ed of 15 m/s on the surface of planet X where the acceleration duvahpu5 zl2up 9;s8 :yzrk4 uo(lsem8(e 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 wi o(d;ok il3r)/anhz2 fth a speed of 14 m/s on the surface of planet X where the acceleration due t 3hkaldri2 /nof z)o;(o 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 holdzmgmw:w*m. q1s a ruler between your fingers and releases it without w wwq.*z:m1mg marning, 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 af86 .h pgim xa286b6sqwg f5;/cok rmwzter 3.00 qr6 h.gb2i5 a/6om wczx6wspfm8 k;g8s?

  A bullet shot straight up vd6e) zql6/sb returns to its starting point in 19 s. What is the initial spees)ldqb z66v/ed of the bullet?

  A ball is thrown strai0ii2c yf1z4uy9 kqrm((t ukm: ght up with a speed of 36.0 m/s. How long does it take to return to its starting poi9kik(z u iyy02fm1(4u: cm rtqnt?

  A ball is thrown downward ci.atwjen((x+ b8v mnat d6)6from the top of a building with an initial speed of 12 m/s. It strikes the ground after 3.2 s. How high is the(t n v +atnaci)j 8.bd(6xw6me building?

  A ball is thrown straight up with a speed of 30 m/s. (only fill in num+l:qfflv t( 4vxq6v4i erical value in the blankslv( f+v4qiq:f x vl46t)
(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 s4 l-zezt kazwhw571 vlvgr x*k1( 7uy.peed of 20.4 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 1 seconds later.  (数值)  $m/s$
(e.) Determine the time at which the ball pass a point 8 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 8.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what is the veloc .(e p*cyp 5jxcrr5+1*uyllx;wk ,ntvity at t = 1.0 s?

  In Fig. below, what is the veloci )y4y3o+br t a6)kxrzjy,4ju bty at t = 2.5 s?

  In Fig. below, what is thexk bdidh v5 c*xo048m*xvn 7e4 velocity at t = 4.0 s?

  In Fig. below, what is t*0mkdvd ,p auz0d4xo 6he velocity at t = 5.5 s?

  In Fig. below, what is the averagez 20r t)4ql vwn 7mta5fnp.7ej velocity from 0 to 4.0 s?

  In Fig. below, what dqw/. tbtwex9hx/na7-n .pc9 is the average velocity from 0 to 6.0 s?

  In Fig. below, what isqterg 7- :7 )+ a5vrmktgiwwv9 the acceleration at 1.0 s?

  In Fig. below, what is the acce;9lsov+m1(v uld:c h:oyow u mvw(oq :ue-5k4leration at 3.0 s?

  In Fig. below, what is the average accelesp ;he z/wke64ration from 0 to 5.0 s?

  In Fig. below, what is the average acceleration from 0 to 8.0yw,s*evlq: zypi+wkr0sy, p x1 3m nq7o54qq0 s?

  In Fig. below, what is txl43 lsy3n-qu he displacement from 0 to 8.0 s?

Does a car speedometer measure speed, velocity? {speed|velecvx2pd 5/w xhg-w x53ocity}

  An object can have a varying speed ixw1i jigwv; +tbn0( is852acuf its velocity is constant.

  The velocity of an object can b. sab:g .s2a..fakmox2ai jx j q:ge:.e negative when its acceleration is positive.

  If one object has a greater speed than a second object, the 8**h i8t9kxfy fqrw 0xfirst must have a greater acceleratkx* yf90 f xt*hw8qir8ion.

  Two cars emerge side by side from a tunnel. Car A is traveling with a ma6p ,9ow3 vnmspeed 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 a fxd/b-i9 d *te)g)89gwkuq b1u5neu zs its acceleration decreases.

  A baseball player hits a fousss*y0 l30uj8utjjy c -rv4 v:psp7j 9l ball straight up into the air. It leaves the bat with a spee-0u9y4j*vpjup st r7 3j0ys8cjsl:svd 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 accelerabez9l bx :n.dx 2s-/qo.j/ suxtion, how does it change ifssol9 qx2z:d.bb /x -.euj n/x air friction is ignored?

  As a freely falling object speeds up, what is happening to its ac:ul u4c0b14vso,d 7o p:lu jm3u /indiceleration, how doe ,l uco1: o7d3lj b4sm0/inuivdu4:ups it change if air friction CAN NOT be ignored?

  An object that is thrown vertically upward will return to its original posygtovrm1d5/y07p2. ac t;fyb ition wit075 t2/ yd.yr gmtofcy va;pb1h the same speed as it had initially if air resistance is negligible. If air resistance is appreciable, how will this result be altered?

  An object can have zero velocity and nonzertru7ej um44a9o acceleration at the same time.

  An object can have nonzero velxgf l 2oeo,95jocity and zero acceleration at the same time.

  An elevator moving from the second floor to 46hqw 3mj)w n5q* asjjthe fifth floor making no stops along the way has zero acc hjq*wj)wqn 564j3msaeleration all the time.

  A rolling ball moves fromfv25xf-a)2f mf)xrw etsz*, t $x_1=3.2 \mathrm{~cm}$ to $x_2=-8.6 \mathrm{~cm}$ during the time from $t_1=2.9 \mathrm{~s}$ to $t_2=5.5 \mathrm{~s}$. What is its average velocity?  (数值)  $cm/s$ (only fill in numerical value please)

  A particle at $t_1=-3.9 \mathrm{~s}$ is at $x_1=3.2 \mathrm{~cm}$ and at $t_2=3.7 \mathrm{~s}$ is at $x_2=7.9 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete laps around a quarts:x3 6/jtfm:(wqe5.ly ihkmzer-mile ($1 \; mile = 1609 \; m$) track in a total time of 11.7 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 101 m away in s4 2fwbt nnuw*boo +6+9.1 s. It then turns abruptly and gallops halfway back in 4.6 s. Calcul4w t sb+wo+ 2onn*fu6bate (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 from9 rn tmrou n/q.2uq7m2 $13 \; m/s$ to $22 \; m/s$ in 4.3 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 fro9* 0 vx lznrj1u6kg9l9pog 5sbm $16 \; m/s$ to rest in a distance of 56 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reaz/i plafoj *i45 9fi7ich a speed of $28 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $2.2 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinter can burst out of the blocks to ess rq *m3/o3idqoentially top speed about*omr33/ d oqqi $11.1 \; m/s$ in the first 14.3 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 frozc5 (t/26jv, unwwfeom a speed of $20 \; m/s$ to rest in 5.83 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 highway. Assgnt wf/k2jgsok.*ws40 vtx 85uming a decelerwk2t0 8.t54vnsfok* x j/ sgwgation of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a tr fkg zrn(/8mkv 4(pqjrg8f ,6juck 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 complete the 10,000-m runp:t 3/ pyk4 gtqis(pk( in less than 30.0 min. After exactly 27.0 min, there are still 1100 m to go. The runnertk s3 pg iy:t(p(pqk4/ must then accelerate at $0.20 \; m/s^2$ for how many seconds in order to achieve the desired time?    $s$