Suppose that an object travels from one point in space to another. Make a comuzplv;)f +1crgtb y:-parison between the displacemzlrvcypbu1 - t; f+g):ent and the distance traveled.

  When is the average velocity of an objecac +i)x/i 6 xd,ihl5fnhm2w8qak8v,a t equal to the instantaneous velocity?

  A new car manufacturer advertises thate0a hdr*ly h x;u89ny; their car can go "from zero to sixty in 8 s". Th nu d09ely ha8xr*y;h;is is a description of

  An object moving in tha*6t7fvt yq o03mhnwt. w5m0g e +x axis experiences an acceleration of $2.0 \; m/s^2$. This means the object is

  Suppose that a car trav2 pgso wcts mg-),5og/eling to the East (+x direction) begins to slow down as it approaches a traffic light. Make a statgt)m5,/ow-ss cgp og2 ement concerning its acceleration.

  Suppose that a car traveling to the West (-x direction) begins to slow downnf zq)y l9(-lf65p owb as it approaches a traffic light9nof pzfb-(yql)5w 6l. Make a statement concerning its acceleration.

  Suppose that an object is moving wrj86:zwk - sbjith a constant velocity. Make a statement concerning its a:rwjs b-j8k6z cceleration.

  If the velocity of an object isgjb lb28 mrfk .9 l:dps)72+yq dchbz, zero, does it mean that the acceleration is zero? Supp:yqj) b7mpl 8c,dr g2+k2fs zb bhl9.dort your answer with an example.

  Can an object's velocity change direction when its acceleration is constantrooay6b y+o mj9/3x /p? Support roxbpoa// y+o jmy36 9your answer with an example.

  Suppose that an object 3yr l5b /ek( dwye78n/d sgh5sis moving with constant acceleration. Make a statement concerning its motion with rd nyr (75/3kws 5elhd/g8b esyespect to time.

  Can an object have increasing speed while its acceleration is decreasing? Supp(elidv/8 e a 9xu20s)o/fvqjuort your answer with an example.o a du9vfv/ejl0)u/2 e(s8xi q

  Suppose a can, after an initial kick, moves up along a smooth hdzd y4t1/r x0bill of ice. Make a statement concerning its acc4z1 tdx0r bdy/eleration.

  Under what condition is average velocity equal to the average of the objeci54t*fy)3r wazxaa s.t's initial and final3z4iyx).*5 wfa atsar velocity?

  Objects A and B both start at reex ta2s zp8v38st. They both accelerate at the same rate. However, object A accelerates for twice the time as object B. What is the final e83azvp tsx82speed of object A compared to that of object B?

  Objects A and B both start from respok9)e t7 0xscino,)8zw:gqc t. 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 co nzcoq 9se7 cko0w)ig )xt8,p:mpared to that of object B?

  When an object is released from rest and falls in the absence of frictio.2nehgq9*3/ 5 4 rswv ajfkmaan, which of the following is true concerning its g5/ 32aqfs 4v9.a e*rw kahnjmmotion?

  When an object is released from rest antls9fu5) ru7d d falls in the absence of friction, which of the following is true cod)s5 rl ut7f9uncerning its motion?

  Suppose a ball is thf:z (y yovp06erown straight up. Make a statement about the velocity and the acceleration when the ball reaches the e6fv ozy0 :yp(highest point.

  Suppose a ball is thrown straight up. What is its acceleration justz xqgvj4 tb(*6hjjj; 2 before it reaches its hig (z;vj qxt2jbgj6 j4*hhest point?

  Suppose a ball is thrown straight up, reaches a maximum height, thenejl -,/:m lc7 *ishlld falls to its initism*l7hc lj- d: /el,lial height. Make a statement about the direction of the velocity and acceleration as the ball is going up.

  A ball is thrown straight up, reaches a maxi ryrl3 9bp +,rim4b)zjmum height, then falls to its initial height. Make a statement about the direction of the velo4ybm3j zp irr ,)+lbr9city and acceleration as the ball is coming down.

  Suppose a ball is thri/ly xd8*ho)no 2m/a aown downward in the absence of air resistance. Make a stateiaoda)//ym *hxlo8 n2ment concerning its acceleration.

  Suppose a skydiver jumps from a high-flying plane. What is her akgbo,6xznx1+pn t5(3q dl3 pdcceleration when she she reaches terminal velocipkt3qndn+ o gl(xd,p5bzx6 13ty?

  A ball is thrown vertically up:z-g): sw hotpward with 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? (How many timesw:z) hgo -tps: higher does the second ball go than the first ball?)

  Ball A is dropped from the top of azepm zpfc v;g* .2y0f: building. One second later, ball B is dropped from the same building. As time progresses, the distance between them2 :pe ; *gp0zvfmzycf.

  Ball A is dropped from the top of a building. One second li :/bkzqf+2)pt siw 5zater, ball B is dropped from the same building. As time progresses, the dtk s:/pizqi z2 w5)+bfifference in their speeds

  Two objects are thrown 5-kk cb x8y5ld0j.dbbfrom the top of a tall building. One is thrown up, and the other is throlbdx8bb kc 50-ykj5d .wn down, both with the same initial speed. What are their speeds when they hit the street?

  A brick is dropped from the top of a building. A second brick is thro9r2+a lryq, qqcu+6-x0 rgvpj wn straight down from the same building. They are released at the same time. Neglect air resistance. Compare the accelerapyra,j g6lrrv q 9cqqx2 0+-u+tions of the two bricks.

  An object is moving with constant non-zero velocity in the +x axis. The pos5am tvyqu:4 7qition versus time grap74 uqtqva:m 5yh of this object is

  An object is moving with constant non-zero ah /m l/k3ix o1i/plkvaca 24n.cceleration in the +x axis. The position versus time graph of this objec2ain//polxk hv c4im./ ka31lt is

  An object is moving with constant yjryo*c4fhcg5d 3frc8-cnxk w6+t7l 6 (ha7 o non-zero velocity in the +x axis. The velocity versus time graph of this objeco7ykh( d+-ca 6wr4 5tfxcjc 37yn8rco*f l6hgt is

  An object is moving with constant je5x*y6 wnxcajuh0:)non-zero acceleration in the +x axis. The velo5ch6uxwe 0 jn*jay x:)city versus time graph of this object is

  The slope of a position versus tnjt9id(:v 2z hf9 ygx;yrtz3 *z3k0vg ime graph gives

  The slope of a velocitluqqw ;/8uct 6ubkrdzxop.y+k0 r/s -;f 8z1y y versus time graph gives

  The area under a curz3 : z8pjbo9cyve in an acceleration versus time graph gives

  The area under a curve in a vel+ub 1 v7opl(yuocity versus time graph gives

  If the position versus time graph of an object is a horizontal line, the objec;fvb04 flmy 5sifgx.ux0x5y (t imfs;4f l iyu0y5gxb05(vxxf. s

  If the position versus time gra q1bq7oxu/np(.07)jkvr d n2t;9xv ifazo, g lph of an object is a vertical line, the object is;,1 a. j20(xtkni7znr d/qgpoq) lob xu7vf 9v

  If the velocity versus time graph of an object is sjxq 6aoll.i.z2 ex k3;(o1efa horizontal line, the object is;2sxoje(6.ekl13ilx .az qof

  If the velocity versus time graph of an object is a str1)1ym ig (cbtkaight line making an angle of 30 degrees with the time axis, the objectmy1)kc(gt 1i b is

  An object moves 15.0 m north and then 11.0 m south.9 f s.i,it o2pxe-ypc* Find both the distance traveled and the magnitude of the displacement v*syp2e i if,x.-ot pc9ector.

  A boat can move at 30 km/h in still bm, *3e/xwx oxwater. How long will it take to move 12 km upstream in a river flowing 6.0 km/hx m o3*be/,xwx?

  55 mi/h is how many m/s? (1 mi = 1609 m)*s j+)k6 7yq(ncxgnkr

  What must be your average speed in ordddxvn,)b+e;dwl2j nw* c23 pzer to travel 350 km in 5.15 h?

  A runner ran the marathod9j(i:flhq(fjzi- (l p.nig42v g 8j an (approximately 42.0 km) in 2 hours and 57 min. What is the average sp9 iz(ilql8d2v(jpj:j (gf g-f i.a hn4eed of the runner in m/s?

  A car travels 90 km/h. How long does it take fr/mca 0q.cm,q9d v9+na 5fmsouds6p6or it to travel 400 km?

  A ly (light year) is the distance that light travels in oq3 89cvpq,mp 4i,w hqpne year. The speed of lipp8 4q,9wpich3v mq,q ght 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 t td uaww3sw9-o1* m9jnv* gd(phe side for 4.0 s, how far do you travel during this -o *su*gdvwmptw1a9nd39jw( inattentive period?

  If you run a complete loop around an outdoor track (400 m), in 100 s, your avemto+wma , 5hc6rage velo a6m5 hw+tm,occity is

  A polar bear starts at the North Pole. It travels 1.0 km south, then 1.0 1qvzxh g6muyt/ g4e 94km east, then 1.0 km north, then 1.0 km west to return to its starting point. This trip takes 45 min. /ztg6h xq4y 1m9gv 4ueWhat was the bear's average speed?

  A polar bear starts at the North Pole. It travels 1.0 km south, then 1.0 km hgy/)p,ttiu1 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 bear's average velou/,tt hy)1gipcity?

  You are driving home on a weekend from school at 55h+w (7djn :3vju*t6ihwflebk;7 fmh a i8l.k/ 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 mi+j77f e:tl/kjw36 ahwilh ;f(n*um d ki8hvb.nutes. How far is your hometown from school?

  A motorist travels 160 km at 80 km/h and 160 km at 100 km/hmh:;;xv a) tx5j+-eeqp: sjxm. What is the averag-+q je5m:;sa)x: ;hmextpvxje speed of the motorist for this trip?

  A motorist travels for 3.0 h at 80 km/h and 2.0 h at 100 kmaj5sj1kqi4y 8 /h. What is her average sqj 48ay51ks jipeed for the trip?

  An airplane travels at 300 mi/h south for 2g)fq ) c jj+k,q.xi1ah.00 h and then at 250 mi/h north for 750 miles. What is the c ji)fh+ag jq,).1xqkaverage speed for the trip?

  In a 400-m relay race the anchorman (the person who runs the last 100 e7 : qpeni4lv8m) 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 selviqn:8 7 4eptarts the final leg of the race, in order that the team A runner not lose the race?

  A car decelerates uni2f;nw j pwa1 f3-zb8qyformly and comes to a stop after 8 s. The car's average velocity during deceleration was 78 km/h. What was the car's 3-w281; w qj yzpnbfafdeceleration while slowing down?

  An airplane increases its speed from 100 m/8tww f0m 0yiy;s to 160 m/s, at the average rate of yiw m0yw 80f;t$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h accelerates at the rati* jch*r:x 1i u.ulr0ye 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 accel. ngvo3*j vmz05l r;laerates 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. mug ;wv(74ulw xuvwz3h8.j(x It then speeds up with a constant acceleration (ug; w4xj8wv3vuxu(. lz mwh7of $2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial.mbet-w +)iwnh7:yf w velocity of 2.5 m/s experiences a constant acceleration of )e:wbtw - wmnhiy f.7+$4.3 \; m/s^2$. What is the cart's displacement during the first 5.4 s of its motion?

  A bullet moving horizontally to the right (+x direction) with a speed of 473 e 8he19q*no6bxdg; bo2c( z1g mf lu6vm/s strikes a sandbag and ph12e(*m fb;uce dxl9q 6von1o 6bgzg8enetrates a distance of 77.50 cm. What is the average acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is launched from a catp ;,r 7kgx,ylh6(pz,p1rhpixapult 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 acceleratio,grppz l (r1,7x;i6hkhpp ,yxn is constant, what is the length of the catapult?

  A car starting from rest moves with constant acceleration b9q u0hem)5 p )xbb80nsh/nv/f h4z /db2frfbof $2.0 \; m/s^2$ 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 distmhkkp9 +7e qr/gm89 wcance of 200 m. What is its average accep/km9w h7 gr kemcq8+9leration?

  An object starts from rest and undergoes uniform acceleration. During poewz q;;3;;b ah/v ;zghj6nt) ne4cpthe first second it travels 6.4 m. How far will it travel during the third eh/e 6w4 3njoh zvq;;pcb;;;npz)atgsecond?

  An object is moving in a straight line with constant acceleratioyh;2 -nnr 4ffxn. Initially it is traveling at 16 m/s. ny fr f4x-2nh; Three seconds later it is traveling at 10 m/s. How far does it move during this time?

  A car starts from rest and accelerates u1dblurb6l;kh :pb6+ mniformly 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;(2w pp+.erb* hz l tqgh0fw2a dry 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 traf(2 f+bvxq g2/8piw3wl o0qaszfic light turns green, a car that has been waiting at the intersection starts ahead with a constant acceleratio (bwip3+28 xvlq0fq oaszw2g/n 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 surfapve s.5i-bn aw 8la7(kce of planet X where the acceleration 7sv5w -8k i.a pb(elnadue 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 oneq-iy-, xwxmh )**w ra the surface of planet X whe)- r*,-qwwxe*y xmai hre the acceleration 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 speed of 15 m/s on the surface of plhd:1aw- qe;:ncx oa8lanet X where the cx wn:; qa:elda- ho18acceleration 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 surface of planexky-/ 36 obmvot X where the acceleration due to gra/6oob m k-xv3yvity is $3.5 \; m/s^2$. What is the speed of the object after 8.0 s?

  Human reaction time is uskyoy osnh8s-h/t p.)0w4 ps; yually greater than 0.10 s. If your friend holds a ruler between your fingers and releases it without warning, how far can you expect the ruler to fall before you cwo-y/ sy0 o h )sksp4h.n8typ;atch it?

  A ball is thrown upward at a velocity of 19.6 m/s. Wharpjo xstmmr1 ru96 )14t is its velocity after 3.00 s?)xo mj11tm9srr6ur 4p

  A bullet shot straight up returns to its startinyvzsj +p -k9.4fogyl irh*n 7(g point in 4 s. What is the initial speed of the bulh+v9kn74pr.-o( ijf y gszy* llet?

  A ball is thrown straigh7ihs3v hlh6y/g ec9 7qt up with a speed of 36.0 m/s. How long does it take to return to its starting /iqhh7yvshe c7 g69l3point?

  A ball is thrown downward from the top of a buildi;ly*phh(.ht b ng with an initial speed of 17 m/s. It strikes the ground after 7.9b.phh(t* hy;l s. How high is the building?

  A ball is thrown straight up witeqy7/1h cnxq: h a speed of 30 m/s. (only fill in numerical value in the bxney q7/1 q:hclanks)
(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 aii/22qv2zyuy* 0 xjv umx3dk7yr with a speed of 46.3 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 6 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 6.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what is the velocity zj o9);bv/ryvq.m.lkymh or3 a1p7x 9 j3uix)at t = 1.0 s?

  In Fig. below, what is the velocity at tb+okf. f lw7-t7(mwgy = 2.5 s?

  In Fig. below, what is the velocity at t = 4.0 qno9lya5 ifg(8f v9vhfr 704x s?

  In Fig. below, what is the vel,m jcdxhe5 v:j9(ymd)ocity at t = 5.5 s?

  In Fig. below, what is the average velocib 4u91u rp)a9mj,ndyqty from 0 to 4.0 s?

  In Fig. below, what is the average velocity from 0 toe zhd gque 9;qtklh:rm1 iw*g*-+,p*c 6.0 s?

  In Fig. below, what is the acceleration at 1.0 s:/b5rsyj5qeqh bh1h -?

  In Fig. below, what is the acceleration yucn3*fw/ o6b mdx:7 qz8o 6bgat 3.0 s?

  In Fig. below, what is the average acceleration from 0 to 5.0 deeb2p,vo p)sls9o9.44 sdmbs?

  In Fig. below, what is the average accelerat- yj703qgv17uza sd bidu m.i0ion from 0 to 8.0 s?

  In Fig. below, what is the displaceme9fr ,epj69cxent from 0 to 8.0 s?

Does a car speedometer measure speed, velocity? {speed|vel 1il 5pq9jl4gdr 40fggfv wo(3ocity}

  An object can have a varying . lpg glbodp9.h.;b+5 hdtm1dspeed if its velocity is constant.

  The velocity of an object can be nega87hrterf) bd2kwqf,8 tive when its acceleration is positive.

  If one object has a greater speed than a sec+lda (: shx,w)z)c0 uzwp t:xfond object, the first must have a greater accelerati,:p0c( h) x+ )w:zwfzdalst uxon.

  Two cars emerge side by side from a tunnel. Car A is ,n3*f/;3jeyfe/ fog3 es ugzr1avx4 mtraveling 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 acceleration1x.a shgde ;t r+d8ed;2hbal 9esw-g3 decreases.

  A baseball player hits a foul ball5is-h);phnb9bo sgm 0 straight up into the air. It leaves the bat with a ih ;5s9 pgbbh nmo0s)-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 happe5k8wvxji xytmph.- n:z7py*.oe4nf *ning to its acceleration, how does it change if air fricti.zeofyny*i4w-xnt h8.x kpmp: *j v57on is ignored?

  As a freely falling object speeds up, what is happening to its acceleratta8 j;qd2fda 8p(:jvya s6 t8sion, how does it change if air friction CAN NOT be i8;tva6dj p2st (s8daa q: y8jfgnored?

  An object that is thrown vertically upw 4(uu0qhek m3 h0i4gfkard will return to its original position with the same speed as it had initially if air resistancuk40( gmhf0 3iqek4hue is negligible. If air resistance is appreciable, how will this result be altered?

  An object can have zero velocity and nonzero acceleration at 5tr.(rl hvl4+bkawb4,/o vwpthe same time.

  An object can have nonzero veocu d2:8 +v,szgta8 rhlocity and zero acceleration at the same time.

  An elevator moving from the second floor to the figez. 3u(uayr; qa. /.-cz rfacfth floor making no stops along the way has zero acceleration all the tim..ezaa;3c .uzrqrcg (- fu/ yae.

  A rolling ball moves fra,hu/o lq+rm 2q:.kyw) ia tpv)(twe5om $x_1=2.3 \mathrm{~cm}$ to $x_2=-8.5 \mathrm{~cm}$ during the time from $t_1=1.1 \mathrm{~s}$ to $t_2=5.4 \mathrm{~s}$. What is its average velocity?  (数值)  $cm/s$ (only fill in numerical value please)

  A particle at $t_1=-4.2 \mathrm{~s}$ is at $x_1=2.8 \mathrm{~cm}$ and at $t_2=4.1 \mathrm{~s}$ is at $x_2=8.3 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete laps aruxig./9a z).g47 rqd: rqj.lt s cqy+kound a quarter-mile ($1 \; mile = 1609 \; m$) track in a total time of 12.4 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 liniz/4+ipfdvb2 e, moving 114 m away in 10.4 s. It then turns abruptly and gallops halfway back in 4.6 s. Calculate (a4/p2izv bi+ fd) 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 fro2n h9.r0oik3hkzcwb . cz+p 4nm $12 \; m/s$ to $22 \; m/s$ in 4.6 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 from nq 8s7ufmkd 2h4smz+74c6 ke c$20 \; m/s$ to rest in a distance of 56 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reach a spe*u kg7ziqds3p4zz /:eed of $27 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $2.8 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinter can burst out of haqs b0kt:3r ux+a8- kthe blocks to essentially top speed about 80k+3q rt-ksabh:uxa $11.2 \; m/s$ 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 a sc4 e7pb3su canr25 -rdpeed of $21 \; m/s$ to rest in 5.29 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. Aqve2gfpembar z4-1rcg;x3z2 +.r0 ct ssuming a decrp;gae4qc zm+cvfz r rg2be3-. 02 x1teleration of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck gois-ufw, -55 fzrf bbpsf*- mc(tng $25 \; m/s$ 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).    $m$