Suppose that an object travels from one point in space to another. l(h47v+o rwux Make a comparison between the displacement and the di7x+ o4rvhu l(wstance traveled.

  When is the average velocity of kvo-3zdcw j+qm+7)dm, d oz5u an object equal to the instantaneous velocity?

  A new car manufacturer advertises that their car can go "from zero to siuxxfj 06mj :/d w,z k2n.(cwufxty in 8 s". This is a description of2nw z/:jdxf mw60kc(j.u,xfu

  An object moving in the +x axvsw l92*t;:j tqqr7 a4lxe -qdoxo0 .lis experiences an acceleration of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to the: jvhy/*p ry mpzd-az(iuf*/f0he- o ;f st,6x East (+x direction) begins to slow down as it approaches a traffic light. Make a s6fjt(;yei -y z v/ph r0-/s *xdm*fpfa,uh:oztatement concerning its acceleration.

  Suppose that a car traveling to cg3r, jv, v1tgthe West (-x direction) begins to slow down as it approctjvg1v,gr3 ,aches a traffic light. Make a statement concerning its acceleration.

  Suppose that an object is moving witha bqa3/y64rrd a constant velocity. Make a statement concerning itsr3brdqaa4 6y/ acceleration.

  If the velocity of an object is zero, does it mean that the acceleo lqvbl:4 3fx0ration is zero? Support your answer with an exampxll:0f b3 ovq4le.

  Can an object's velocity change direction when its acceleration is constant? Suyim b+k8mcim.a2)4 mrpport your answ+m i mk8ya2 br4cmim.)er with an example.

  Suppose that an object is moving with constant acceleratia8s 3- uuf)(f gera: gjr9zdl:on. Make a statement concerning its motion with respecru (8g)a :djz-: e usfrlfga39t to time.

  Can an object have increasing speed while its accelerati.4rkqg7y h j ccf+jw5l7d* -pyon is decreasing? Support q7+gjc.*4d-f5 h kywrcpy7lj your answer with an example.

  Suppose a can, after an initial kick, movex3 9r ysqp4kdbj(wg3exo:k9-ti k(iye: 2*cds up along a smooth hill of ice. Make a statementqip-xk k (ee(j dd939s4g:k 2xyo: i3wt*byrc concerning its acceleration.

  Under what condition is average velocity equa8xdf;a )bgi z5l to the average of the object's initial and finfd b8xg;a)iz 5al velocity?

  Objects A and B both star3h g .-/7avxpou )vmk; ar 2jp/yc(drst at rest. They both accelerate at the same rate. However, object A accelerates for twice the time as object B. What is 3ya;cu.vk v/7d o)/ 2xmjhr rp(ap-sg the final speed of object A compared to that of object B?

  Objects A and B both 6kox1)mx r:yaznb g2mw+ d5 7ustart from rest. They both accelerate at the same rate. However, object A accelerates for twice the time as object B. 1x+ymm rdx57) a6 :ngowbuk 2z What is the distance traveled by object A compared to that of object B?

  When an object is released from rest and mu9373cs+:bj loip7 4o uh piffalls in the absence of friction, which of the following iso39olfbs47c pumiui j:+ 73h p true concerning its motion?

  When an object is reletpxvhy8o0 540pgy* sy ased from rest and falls in the absence of friction, which of the following is true con*00s y 5o4htypyp 8xgvcerning its motion?

  Suppose a ball is thrown straight up. Make a statement about the velt+0a7nh(qoavjt egtiy;9 : ;u ocity and the acceleration j+qyn0;(viu :7 atteahg;t o9 when the ball reaches the highest point.

  Suppose a ball is thrown straight up. What is itsd+ch9epbd2qq 7+cqc l k1a0* i acceleration just before it r i+c qae1 9p2* cdhkdb70qlc+qeaches its highest point?

  Suppose a ball is thrown straight up, r1*:agnr ugs a(8.ttrxeaches a maximum height, then falls to its initial height. Make a statement about the directigtnr( t sua1ga8: *r.xon of the velocity and acceleration as the ball is going up.

  A ball is thrown straight up, reaches a maximum height, then falls tosca s;:b3trb rf1j;ya5w ic+1 its initial height. Make a statement about the direction of tsr1tc1b by swc i 5jaa+3rf;:;he velocity and acceleration as the ball is coming down.

  Suppose a ball is thrown downward in the absence of air resistance. Make a jo 0x0xy4j4n estatement xy40j xej0n4o concerning its acceleration.

  Suppose a skydiver jumps from a high-flying plane. What is her acceleration wmvtd u-0-da 9dhen she she reaches terminal velocia9vd -t0ud-dm ty?

  A ball is thrown vertically upward with a speed v.n g/e40mt dkqs167 fp(4rzut;0 dhf av 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 z7ea/sf46rg0f tm;hv0 d u1 4nkq(tpd 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 *py kf;oi-2 sb2v2 lzza building. One second later, ball B is dropped 2sfb;2z loky*pv i 2-zfrom the same building. As time progresses, the distance between them

  Ball A is dropped from thzkcp9us)3w : ve top of a building. One second later, ball B is dropped from the same b3 kvp:zwu9sc)uilding. As time progresses, the difference in their speeds

  Two objects are thrown from the top of a tall buil p)mh -p*-j.*dd ecxtsding. One is thrown up, and the other is thrown down, bdhx )pc- sep**j d.-tmoth with the same initial speed. What are their speeds when they hit the street?

  A brick is dropped from the top oft:(e f(n-cz uc a building. A second brick is thrown straight down from the same building. They are released at the same time. Neglect air resistance. Compare tzc(n uc-:t(fehe accelerations of the two bricks.

  An object is moving with constant non-zero velocity in the +x axis. The pos:ij0rv ,jp5tkztg88u ition vergp 0vtzui8r5t:jjk8,sus time graph of this object is

  An object is moving with constant non-zero acceleration in the +x axi5n g 7z8ggnol8 ;eu5vcs. The position versus time grap 7 nv ;5o8gzucgn5lg8eh of this object is

  An object is moving with constant non-zero velocity in the +x axis. The velocitk1ldgxz j2c+:bwd63 yy versus time graph of thisjg dl+1k2b6 z3 wyxd:c object is

  An object is moving with constant non-zer v:rpp q n*4kx,3g.wfwo acceleration in the +x axis. The velocity versus time gr3kqpx,wv.gw4r *nf p :aph of this object is

  The slope of a position versus time graph giv3 neljja0e 3 zhl sakp)i9,3.mes

  The slope of a velocit.a4f 6iwzq db,y versus time graph gives

  The area under a curve in a)8d1aywpi b hjlvv.p7 / ,urh2n acceleration versus time graph gives

  The area under a curve in a velocity versus time graph givesa69 d9desrhxt6 z 3+mfxl5hmvw.g; 7 g

  If the position versus time graph of an objec,orp t-/otr4jt is a horizontal line, the object / po4t r,-tjoris

  If the position versus ti9w(jsupml qlg:l/ 39 ame graph of an object is a vertical line, the object is gl3pau(q9/wsl l: 9jm

  If the velocity versus time graph of an object is a horizontal line, the oq 2m(3bom5i.u x;ulkgbject is x3im;.l oqm(kgu5u b2

  If the velocity versus ti2rvjes nn; 5ewtdnj+: p/:q/qme graph of an object is a straight line making an angle of 30 degrees with +2n v etn ndp w;q/:qe/s5:jrjthe time axis, the object is

  An object moves 15.0 m not dasuli-.k( v:qq0ky u6pj8;rth and then 11.0 m south. Find both the distance traveled anu t ;sk86 ydikl: qqj-ua0v.p(d the magnitude of the displacement vector.

  A boat can move at 30 km/h in still water. 2mo53 *kgczj: 17/zn1vejscn;b yx ay. jm-ycHow long will it take to move 12 km upstream in a riv m nn yg jkv7 bsc.;y1mxz:j32jazy*-c5c/eo1er flowing 6.0 km/h?

  55 mi/h is how many m/s? (168lge/4bgon ktpg7n ) mi = 1609 m)

  What must be your av(y p0wc zii1f-erage speed in order to travel 350 km in 5.15 h?

  A runner ran the marathon (approximateljdqp** *x(di jy 42.0 km) in 2 hours and 57 min. What is the average speed of txp**jd(jdq*i he runner in m/s?

  A car travels 90 km/h. How 7ar fre zd7vt9+nze54 -imj7rlong does it take for it to travel 400 km?

  A ly (light year) is the distance that light travels in one 2w xhlzy te)(*year. The speed of lighx2 yl )hwt*(zet 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 h kng5,efhuv89(;xuw look to the side for 4.0 s, how far do you travel during this inu9ehh8u5wgvk f ;,nx (attentive period?

  If you run a complete loop around an outdoor tra(l+h;xbi bap0 ck (400 m), in 100 s, your averageb+l;bh aip( 0x velocity is

  A polar bear starts at the North Pole. It travels 1.0 km south, then 1.0 km easq) w(oj9s3ude t, then 1.0 km north, then 1.0 km west to return to its starting point. This trip takes 45 min. What wq u() jd3s9woeas the bear's average speed?

  A polar bear starts at the North Pole. Itv,do m5,2la z 1h)mw-clym.ee 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 min. What was the bear's average vel ovw)mmeemc1 y-dz2.,a,l5hlocity?

  You are driving home on a weekend fvxha-pfz /b(* rom school at 55 mi/h for 110 miles. It then starts to snow andfab- pv*/( xhz 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 160cmtl-*ei: wl8 km at 100 km/h. What is the averag 8lm iet-wc:l*e speed of the motorist for this trip?

  A motorist travels for 3.0 h at 80 kmw-bd3 u+y d0p0b1wnedm/)gm k/h and 2.0 h at 100 km/h. What is her average speed for the y wbmd n+ke-)db0/d0m 1ug3pw trip?

  An airplane travels at 300 mi/h south for 2.00 h and then at 250 m- 8 qk3:gsuctky rahs9j53 ynwq9i0,pi/h north for 750 miles. What is the average speed fow0qk - t y8u9khqgics,5y:s93arn3 jpr the trip?

  In a 400-m relay race the anchormanmtfidd:6dnj5*qd:s + st 5mz 8 (the person who runs the last 100 m) for team A can run 100 m in 9.8 s. His rival, the anchorman for tea8j6mz d:sm5+sdq*:i dtt 5dnfm 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 the race, in order that the team A runner not lose the race?

  A car decelerates uniformly and comes to a stop after 1hk-dhne a 8b8)4 s. The car's average velocity during deceleration was 51 km/h. What was the car's deceleration while sloa8khd)h- e n8bwing down?

  An airplane increases its speed from 100 m/s to 160 m/s, at the a5o.ak+ry k7q5uk sg n8verage rate of kks5 k+g87o ra5uy.nq$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h accelerates mkfp 9me xle9qbi:x(, g1x+/ pat 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 accelerates at ,z w4gcy6fh:ayu)wqp 2 g6b( z$4.0 \; m/s^2$ 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 hfmq:h.8ygf e)owlz7 .t)9q racceleration of:f) g)hl rzfhywot89.qm7 .eq $2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial velocity o+.q l;(t :teq .xbhsdwf 4.5 m/s experiences a constant acceleration ox;e.d q.tbhltq: s w(+f $2.4 \; m/s^2$. What is the cart's displacement during the first 6.8 s of its motion?

  A bullet moving horizontb*ylani,/u (v ally to the right (+x direction) with a speed of 487 m/s strikes a sandbag and penetrates a distance oai v y,nub*/(lf 26.15 cm. What is the average acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is launched from a catapu2ni r3lv ;g0 x5gm-k w.kjiyw8lt on an aircraft carrier. It reaches a speed of 42 m/s at the end of the catapult, and this requires k rg8myl5vx -gwkin 32jwi; .02.0 s. Assuming the acceleration is constant, what is the length of the catapult?

  A car starting from rest moves ux5 ;,cbphffl+u +b q3with 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 o*/clkp 2kb k z)daf(7cf 200 m. What is its average accele(kcpdf* z72/ a)clbkk ration?

  An object starts from rest and undergoes uniform acceleration. r.9 pq itx76ga During the first second it travet6g 9a.7 iqrxpls 3.8 m. How far will it travel during the third second?

  An object is moving in a straight line with constant acceleration4v n,ts).r +s5 fmyfqs. vy5ls. Initially it i )ntvsy.m5 qf.slv 4s5srfy ,+s traveling at 16 m/s. Three seconds later it is traveling at 10 m/s. How far does it move during this time?

  A car starts from rest and accelerateckkm 3,p;op8ws 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 del/zzlt:eocnb2( ):fo celerate 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 been waitingo8oi9 nhw2pc1 at the intersection sop91owi nhc28 tarts 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 speed of 12 m/s on the surface ()mpsw3o9e s nz2f,pqof planet X where s2pe qf3) mzs,wo(9 npthe acceleration due to gravity is $1.5 \; m/s^2$. What is the maximum height reached by the object?

  An object is thrown upward with a speeij n3/m61ko dp:+psitqb o v9+d of 12 m/s on the surface of planet X where the acceleration due idv+p +p1sqn:9b to ji3okm6/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 hab+fnwa9owhl7:y(lj4dsu 69 1v cy)15 m/s on the surface of planet X wherej4hvb7l:l6 yd1h 9+uy9w waoa)(sfcn the acceleration 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 ofww + mb..h89sd d: jltgqd+c6aaw1:tj 14 m/s on the surface of planet X where the acceleration due to gravity is +dh : 8 sd1.t:ljbwjtd6wwa.qg9+cam $3.5 \; m/s^2$. What is the speed of the object after 8.0 s?

  Human reaction time is usually greater than 0.10 2af l 7 7is;fa09pfxjas. 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 a x7f7alfjp2f 9;0ais catch it?

  A ball is thrown upward at a velocity of 17q*c 6syiy7he 9.6 m/s. What is its velocity after 3i7y6cq y *ehs7.00 s?

  A bullet shot straight up returns to its stcwj3-w-f 1 qk9, tcsntarting point in 9 s. What is the initial speed of t3qfcwj,tnw k9st-- c1 he bullet?

  A ball is thrown straight up with a speed of 36.0 m/s. Ht6 uya1bsoo4,ow long does it take to returnu4y ob s,6t1oa to its starting point?

  A ball is thrown downward tby +6dy/ 8aztfrom the top of a building with an initial speed of 16 m/s. It strikes the ground after 3.6 s. How high it6az y yb+/dt8s the building?

  A ball is thrown straight up with a speed of 30 m/s. (only fillosa 64w 2zppr09:y+ckp,ssh(xv5 ig n in numerical value in the blank p ws:kc9x,g0s hy+i5a(4s6p2znpor vs)
(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 straw. . ajoyd w04;odu(iqight up into the air with a speed of 48.3 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 2 seconds later.  (数值)  $m/s$
(e.) Determine the time at which the ball pass a point 12 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 12.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what is the a8hv/: arq v6zti.gzc j-,kd-velocity at t = 1.0 s?

  In Fig. below, what is36 t8rbk+xsfak5:mt a it6j; *k )omvy the velocity at t = 2.5 s?

  In Fig. below, what i.e a9x7; b-vao l-bpfks the velocity at t = 4.0 s?

  In Fig. below, what is the velocity at t = 5.5 f( ueq6d2jq0 us?

  In Fig. below, what is the average velocithc1t/i1a hj t;.g2okay from 0 to 4.0 s?

  In Fig. below, what is the average velocity from 0 to 6xg e* l1ddu9-9nib/i k.0 s?

  In Fig. below, what is the acceleration 95dbh d-hxv* zat 1.0 s?

  In Fig. below, what is i+: ez di b 14xjczf,-xyzq1z+the acceleration at 3.0 s?

  In Fig. below, what is the average acceleration froi2gp)7vurn e+2(u/+n 9 yd wsglhfb4sm 0 to 5.0 s?

  In Fig. below, what is the average acceleration k-wibm 0rds/e/54za fhr6c3mfrom 0 to 8.0 s?

  In Fig. below, what is the displacelcfh /fk-k (6gment from 0 to 8.0 s?

Does a car speedometer measure speed, velocity? {speed|velocihm+8 pi-c sf1tpd5( soty}

  An object can have a varyinsx *2yqmz4193drdkff.4z i gdg speed if its velocity is constant.

  The velocity of an object can be negative when its acc)tw ipma77+ fkeleration is positive.

  If one object has a greater speed than a second jrikjyv 5ga* iyz+*(3lcqi*+,sg g u:object, the first must have a gr*yky* rijjq u zi5vas:gcgg+ *( +i3l,eater acceleration.

  Two cars emerge side by side from a q t5 *zfxzqot2e0c0u2 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 acceleratios9:(paajw y9x:0ls eezqo+ (e n decreases.

  A baseball player hits a foul ball straight up into thb ,i-gy (jyfh0e air. It leaves the bat with a speed(,jf gb- yhyi0 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 p9wbv5fzvc8d w/bat stg.8 r) e)c9a:happening to its acceleration, how 8v/:)g.8t9edcb vfw p 9 )szratb5cw adoes it change if air friction is ignored?

  As a freely falling object speeds up, what is happening to its ac1q cptl(,)yla-uv1 w kceleration, howu1 v(cka ltqy)1,l-w p does it change if air friction CAN NOT be ignored?

  An object that is thrown vertically upward will return tc;u 10yzws )lz9k eo7to its original position with the same speed as it had initially if air resistance is ne0y1;okz)wz u7 t9c lsegligible. If air resistance is appreciable, how will this result be altered?

  An object can have zero velocity and nonzero acceleration at the same tim9./titlymk ezh4mv j;0zod+ 8b agr /)e.

  An object can have nonzero velocity and zero ac3f,x g 0sfen)utt9*cuceleration at the same time.

  An elevator moving from the second floor to the fifth k.86ys) eswosggbvc3k(6i 5 84xpvok floor making no stops along the way has zero acceleratik4 e65w(p6 sxi83ko.vg gs c s)y8kbovon all the time.

  A rolling ball moves fraw qr;p rf-y:h*tcw-m 80o8x wom $x_1=2.2 \mathrm{~cm}$ to $x_2=-8.6 \mathrm{~cm}$ during the time from $t_1=1.8 \mathrm{~s}$ 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 $t_1=-2.2 \mathrm{~s}$ is at $x_1=2.5 \mathrm{~cm}$ and at $t_2=4.4 \mathrm{~s}$ is at $x_2=7.6 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete lylhdrn )u z-7dw4fa88 +)zu wpaps around a quarter-mile ($1 \; mile = 1609 \; m$) track in a total time of 6.7 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 114 m axvt5(cku6gm gw;s00 lzw )+zx j) n(htway in 12.3 s. It then turns abruptly and gallops halfway back in 4.7 s. Calculate( 5wulkg( +0nsc gv )z06w)thx xztj;m (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 fr4qw p;vn )dgr aevi+1:om $12 \; m/s$ to $25 \; m/s$ 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 fromjiv+daib0/z+,h 61jg 1r qx ww $21 \; m/s$ to rest in a distance of 59 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reach a spe. n9jlq-4w epg5tfev8ed of $29 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $2.9 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinter can burst out o/; nis*u5 zt 1wwf,ugcf the blocks to essentially top speed aboutt,u*1 fs/ z wcui;n5wg $10.4 \; m/s$ in the first 14.9 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 ov5(msz -ad8afrom a speed of $18 \; m/s$ to rest in 4.65 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 highwae-fcsc6jop4 8y. Assuming a deceleration of cc6feoj84 ps -$7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a trucgdyx;7m,hkn+z cy0-mx h03 wrk 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).    $m$