Suppose that an object travels from one point in space u2swu3, :voix to another. Make a comparison betwes3ox uuwi2,: ven the displacement and the distance traveled.

  When is the average velocity of an object equal to the instantam4w+o2r* *lmkcz uf(dneous velocity?

  A new car manufacturer advertises that their car can go "from zero to sixty in 8tflmcm x(i0qj-d8 zk2:7wd6a s". q:di-70 w 8djxaztlmf(mc2k6 This is a description of

  An object moving in the +x axis experience r/)l0v cpzt3o4tv2xgs an acceleration of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to the East uxfrt6o-v vtx)m *r 1kog-ap319+ jtn(+x direction) begins to slow down as it approaches a traffic light. Make a statement concern1 vfnx3k6pora j gtu o-xmr 9v-t)t1+*ing its acceleration.

  Suppose that a car traveling to the West (-x directiy 7x.cx2 9losmon) begins to slow down as it approaches a traffic light. Make a statementol.c79xyx 2sm concerning its acceleration.

  Suppose that an object is moving with a constant velocity. Make a pnu ndxb:b2be :+wq,q;i5o4mstatement concnm 5n qb e:qb 4,oxwuib2d:;p+erning its acceleration.

  If the velocity of an object is zero, does it mean that the acce-8vobda+a :d 67k mdxhleration is zero? Support your answer with an examplab:-d76h+d8dxvm ko ae.

  Can an object's velocity change direction when ;xw bvd d5/ng,72*lno ,xxe btits acceleration is constant? Support yourdn5 d bx7,*/eogbxxvw,2 ;tln answer with an example.

  Suppose that an object is moving with constant acceleration. Mabrd.n ahp9biqz( 0z;/ ke a statement concerning its motion with respect to( .bz0zpbrh i anqd/;9 time.

  Can an object have increasing speed while its acw 8 m/qwl9ztshsz)h / d**5vhwceleration is decreasing? Support your answerwhs9 )qzs/m5/lz8wvd*w th *h with an example.

  Suppose a can, after an initial nwi+.+m+rivf kick, moves up along a smooth hill of ice. Make a statemeiiw +m+ +rnv.fnt concerning its acceleration.

  Under what condition is average velocity equal to the average of uf -hiy l .b.5,aafc rtj7xz9;the object's initial and final velocitt7-9 fhbzau;jyc5.f lr a ,xi.y?

  Objects A and B both start at rest. Thw d( p3q0t)nm)aooh-dg.3e yley both accelerate at the same rate. However, object A accelerates for twice the ti) n3-y)3dtqho w0a pmlog. (deme as object B. What is the final speed of object A compared to that of object B?

  Objects A and B both staros3 2kje 0d/ctt from rest. They both accelerate at the same rate. However0j/t3d2ek o sc, object A accelerates for twice the time as object B. What is the distance traveled by object A compared to that of object B?

  When an object is released from rest and fallshzo;g* jd l)ad5:j1gl in the absence of friction, which of the ;jga*1 odld )5jlz:ghfollowing is true concerning its motion?

  When an object is rek/kf.) :+m6p1 xfnjc)n gcefxleased from rest and falls in the absence of friction, which of the following is true concerning its mokc xpf:gm) nk n.cff)+e/x16jtion?

  Suppose a ball is thrown straight up. Make a statement about the velocity and2 0l* b6p9exvg cse.96pspczv the acceleration when the e*z 6e 9 cs0 v9s6px.vpl2gcpbball reaches the highest point.

  Suppose a ball is thrown stmwqbpu9y0*rw e:wt3(raight up. What is its acceleration just before it reaches its hbepwuq(0 *t yr 3wmw9:ighest point?

  Suppose a ball is thrown straight up, reaches a maximum height, then falci 2n8q;w2n bjls to its initial height. Make a statement about the direction of the velocity and acceleration n82cw;2nbq jias the ball is going up.

  A ball is thrown straight up, reaches a maximum height(bw 9)40rkbu51 nfc bknp;ei c, then falls to its initial height. Make a statement about the direction of b 9p;4 er5c1k0kufinwb nb) c(the velocity and acceleration as the ball is coming down.

  Suppose a ball is thrown downkc 6 7yv8mui5wward in the absence of air resistance. Make a statement concerning its accelerationicv678k wmy 5u.

  Suppose a skydiver jumps from a high-flying plane. What89d22txskdr ((c n3 xswkrqqfm5( u,a is her acceleration when s(( d25f,9 qrsrcwm kax(2x3 8tnds qkuhe she reaches terminal velocity?

  A ball is thrown vertically upward with a speed v. An identi/uf o:cfg 19dwcal second ball is thrown upward with a speed 2v (twice as fast). 1/9 fgu:fcwdo 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 than the first ball?)

  Ball A is dropped from the top of a bu-3asi l-lgimc k6t:j/ilding. One second later, ball B is dropped from the same building. As time progresses, the dista:jclailk3- 6t g/-m since between them

  Ball A is dropped from the top.:dhy t, :s5su t,s w6mvmx4ab of a building. One second later, ball B is dropped from the same building. As,b 4tshav :s5s: tm,yu6.xdmw time progresses, the difference in their speeds

  Two objects are thrown fqyybtf; 05/ sohlu28hsc7sd0rom the top of a tall building. One is thrown up, and the other is thrown down, both with the same initial speed. What are their sphl/0hs outb0y7 qfcs8sd5; 2 yeeds when they hit the street?

  A brick is dropped from the ta-le km),as1b op 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 the accelerations of the two bric1mabae-s, lk )ks.

  An object is moving wbb1zp+;.dl7wtig * s fith constant non-zero velocity in the +x axis. The position versus time gra7 +*itdgf; wp1 blsz.bph of this object is

  An object is moving with constant non-n-h3 v m4uebc(z4 .jkizero acceleration in the +x axis. The posi. vumi(ncb4h4j 3e-kztion versus time graph of this object is

  An object is moving with constant non-zero velocity in the +x axicf e:qj0 (auc7s. The velocity a:ce qj(fc0u7 versus time graph of this object is

  An object is moving with constant non-zero acceleration in the +x axis u7/boxls:i)d . The velocity versus tim iux/b7)ld:ose graph of this object is

  The slope of a position versus time g.zkoje+s9hj .zih 9w(w g3 b9xraph gives

  The slope of a velocity versus f fslt,j 1/84gmebgr5e7or+w time graph gives

  The area under a curve in an acceleration versus time graph lmw xqe462go.gives

  The area under a curve in a velocity vea+a+(fm7 efqkdp d 0-jrsus time graph gives

  If the position versus time graph of an object is a horizonkr0s z bow.26htal line, the object is0.orshbw62zk

  If the position versus time graph of an object is a rq+4zbbvp7 t)d*g l.ii)muq*vertical line, the object is7)zid*g b* tm i4u).qrp+bqvl

  If the velocity versus time graph of an object is a horizontal line, the owi;ak5himd6 w 5sn*l:bject imw* a k i5d6ln5hwi;s:s

  If the velocity versus time graph of an object is a straight line making an angl+k5tg / yp gy12t (zdko9.qlqgey2ttyoz+p19lgk.d 5/ggq(k q of 30 degrees with the time axis, the object is

  An object moves 15.0 m north ;zo.qh.a rg (tu ;nc:eand then 11.0 m south. Find both the distance traveled and the magnitude of the displacement vectorc(.g;rhqae. o;nt: u z.

  A boat can move at 30 kmi s +tjd,5wal1j8do l;/h in still water. How long will it take to move 12 km upstream in a river floj do;wd,sta+j i1l85 lwing 6.0 km/h?

  55 mi/h is how many m/s? (1 md k3di jk(c1t.zp7g7z i = 1609 m)

  What must be your average speed in order to t k1f)mk*omin)y i7ak ,ravel 350 km in 5.15 h?

  A runner ran the marathon (approximately 42.0 km) in 2 ho ihunb 3s4;.+vre7ey+le6uzb 7( plefurs and 57 min. What is the average speed of b7uy7en+zse63 e+ (l4vp i .ruh;belfthe runner in m/s?

  A car travels 90 km/h.6 b7avp kke/v9/0va wj How long does it take for it to travel 400 km?

  A ly (light year) is the distance that lighsi0).zpilf o un+m((q t travels in one year. The speed of light is u(+ l isq(0)i.mnopzf$3.00 \times 10^8 \; m/s$. 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(u ha4sd9l6zli (q* 5*fzd bgt side for 4.0 s, how far do you travel during this inattenti 6*d5*ti l4szb(fqlu(9 zad hgve period?

  If you run a complete loop aro6png5u iey/u :und an outdoor track (400 m), in 100 s, your average velocity inp :iegu u5y/6s

  A polar bear starts at the North Pole. It travels 1.0 km south, then 1.0 km ,yj7h-2kakcu 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's2hkajky-u 7 ,c average speed?

  A polar bear starts at the Nornhu8 o j;-8xsrth Pole. It travels 1.0 km south, then 1.0 km east, then 1.0 km north, then 1.0 kh;rjx88u - osnm west to return to its starting point. This trip takes 45 min. What was the bear's average velocity?

  You are driving home on a weekend from school at 55 mi/h for 110 miles)js *xo k:gb2xr2l 3-z wekr1r. It then starw:2jr )lxxerskbz rg31 k *-o2ts 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 km at 80 km/h and 160 km at u vuxzj 6fo5n35p 1s6f100 km/h. What is the average speed of the motorist forfpu 1 jf6 u5o5xn3svz6 this trip?

  A motorist travels for 3.0 h at 80 km/h and 2.0 h at 100 km/h. Whatlaggf enf3840 is her average speed for thfng4ga8 l3f 0ee trip?

  An airplane travels at 300 mi/h south for 2.00 h and +ns/;:zb nasokqxv2 3lrm),;b pgh9qthen at 250 mi/h north for 75q:p sm;b rn g+)bol9,;qnxzakv3/2 hs0 miles. What is the average speed for the trip?

  In a 400-m relay race the anchorman (the2 :ruk,nbj( sbo.ti.8w uxav- person who runs the 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 ruvu jbixnuk.8, bar(: -sw2o.tnner 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 9 lubfb3ex8+ fn s23vs-s. The car's average velocity during deceleration was 73 km/h. What was the car's deceleration while 3nlbb2 3s8fes u-fxv+slowing down?

  An airplane increases its speed from 100 m/s to 160 m/* 6hd bai) - jr:keodff5kc)c6s, at the average rate of ca*dfkf)eo- 6i6rb:c )h5 j kd$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h accedl zqe(dz6u : 9;k8upqlerates 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 apprvyp h0fblit2ilcj -4 5lg. b *(24accelerates 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 wi vir vidfe l46.cg+kv; p. -g5hs-b9osth a constant acceleration oh;r+5vgics es-p 4v v -k9b.i6fd o.lgf $2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial velocity of 1.4 m/s experiences a constant acceler -e 2mvbkm)xa hs-l tujnwxsp,-9:7z7ation osbx 2x--7vtla ,nw: 7hzpmjs e9)-ukmf $4.5 \; m/s^2$. What is the cart's displacement during the first 9.4 s of its motion?

  A bullet moving horizontally to the right (+x dio a:8x:,tqo 7mj sjck5rection) with a speed of 209 m/s strikes a sandbag and penetrates a distance of 83.58 cm. What is the average accelerationtja8 k c:qj,5moox: s7, in $m/s^2$, of the bullet?

  A jet fighter plane is lau5 0 rzapc)vt+w;u6fmoj, 3zutnched 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 i+jw,t)a6m50uo v u z3;p zfrtcs the length of the catapult?

  A car starting from rest moves wit l/5sc7nhnwy dzk3zo539zoja8 j8;goh 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 average acgqgn c b4/-yc* 2au4aicig4 gau4/c yabn -cq2*eleration?

  An object starts from rest and underg2rtt3,m6c)c7- e5ob7b/ib /am y/ zvdwkl m lcoes uniform acceleration. During the first secobm/lkcb 7/c -7 rtz /)oce3mvwytmd 2,bl ia56nd it travels 6.4 m. How far will it travel during the third second?

  An object is moving in a straight line with constant accelerati :3 5uqwtmwypq tb;k80on. Initially it is traveling at 16 m/s. Three second q;b8tp5:mwywk0t3 qus later it is traveling at 10 m/s. How far does it move during this time?

  A car starts from rest and acceleratesse v 7e (03bn+zkw3gnu 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 atna 3 ,qk/b3 ekqeki6:r (yq8rhdw4e n8 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 ligh9vn-ay) +a0lbe gzjv)d - ,fzwt turns green, a car that has been waiting at the intea+zvdfgza yl)-jn-v09w )b ,ersection 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 wivffvp 8ov, bznq32* 2cth a speed of 12 m/s on the surface of planet X where thev,2*fpv8f 3nz bvqc2o acceleration due to gravity is $1.5 \; m/s^2$. What is the maximum height reached by the object?

  An object is thrown upward w(y gxwk8e.4 tyith a speed of 12 m/s on the surface of planet X where th.wte gy 4yk8x(e 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 dzicun7o9v/juk.ybr/ +57kam1 u : ntspeed of 15 m/s on the surface of planet X whereikmnc u 9k75/1dbunzvjo u7tr:./a y+ 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 of 14 m/s on the surface of planet Xsldq63ix q 4-b.jtzn , where tq.4di jxt3z ,6s l-bqnhe acceleration 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 friend holds a rh/g/ lgk 6d)yg53mz ctuler between your fingers and releases it without warning, how far can you expect the ruler to fall before you ckt)y56 dlg//3zgmh gc atch it?

  A ball is thrown upward at a velocity of 19.6 m/s. What is ex 7dzsn,o u00its velocity after 3.zx0en ds,7o0 u00 s?

  A bullet shot straight up returns to its startin pk6q qm0bs+r8g point in 13 s. What is the init+6 s8pq0k rmbqial speed of the bullet?

  A ball is thrown straight up with a speed of 36.0 m/s.7vxczqdrh1 )mj l:, 5ujy/t0z How long does it take to return to its sl7d:0j qz51 h/,z vj)m urxtyctarting point?

  A ball is thrown downward from the top of a building with an initial speed of ,uun c6ou4j10k.n wyw13 m/s. It strikes the ground after 3j,uouu6nyk 4n.wc w 01.6 s. How high is the building?

  A ball is thrown straight up with a speed orjp *k9 lggo 34h-hr-qf 30 m/s. (only fill in numerical value in the blp* k 93j rgrohhq-l-g4anks)
(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 speed of 23.8 m/sc0 r xq+/f+ q1vlv(wxs. (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 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 ve95fmt7pecnyiuc2d w , / y85uzlxh4:klocity at t = 1.0 s?

  In Fig. below, what ijywq)02l gl3n uc0t i:s the velocity at t = 2.5 s?

  In Fig. below, what is the velocity a+ 6l8 n n(erv,6hy xwp5bo9gnht t = 4.0 s?

  In Fig. below, what is the velocity at t = 5.5 s? ;6;htc3.dj wteqrteyyq..4n

  In Fig. below, what is the average velocity from 0 to 4.0 swce83g xoa: m)?

  In Fig. below, what is the avera0fso-mz7w: o yge velocity from 0 to 6.0 s?

  In Fig. below, what 3m3 gymy wgq-6rff 317zq0kjdj, fnt*is the acceleration at 1.0 s?

  In Fig. below, what is the ajl9u f/h:j- ajcceleration at 3.0 s?

  In Fig. below, what is the avzdmf l8wu6t 8m7z:xi. fg7(fy0yir;u t9pr) aerage acceleration from 0 to 5.0 s?

  In Fig. below, what is the average acceleration fronlc0z b77d3qom 0 to 8.0 s?

  In Fig. below, what is the displacement fr(3hl8hpemu a( om 0 to 8.0 s?

Does a car speedometer meahk 5/ x(gkc iq00j s:+oufaew6sure speed, velocity? {speed|velocity}

  An object can have a varying speed if its velo5 ca04hh0. 7.kniridpv sg)m lcity is constant.

  The velocity of an object can bea;huf.ua0 rih;0j76ef854 zajwq klx negative when its acceleration is positive.

  If one object has a greater speed than a second object, the first must have a gdy.a+6o* ++5 lp3rgtm9b 0a7hi bmvk7xqiy orreat5k ob+xoabg7*+ 0dmayr vm+qtihi 3p 96yrl7.er acceleration.

  Two cars emerge side by sidc tt-dg8 zyb36e from a 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 accelzf,wwda9ux1 m9dbi-2o0 m t0 teration decreases.

  A baseball player hits a foul ball straight up into the air. It leaves tdiyb1- 0 qbn49rcny 5mhe bat with a speed ofi1rbmy 4c9-nb 5 qyn0d $120 \; km/h$. 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 qh(uhuz0 hm 5) y/;if:fzrv n)speeds up, what is happening to its acceleration, how does it change if air fz) rnhiuf z/:m05f q);vy(uh hriction is ignored?

  As a freely falling object speeds up, what is happening to its acceleration, hom8(g9 u5jg .b 4qlmezaw does it change if airz 4(.ejmmqb 5ugag8l 9 friction CAN NOT be ignored?

  An object that is thrown vertically upward will return to its original positiolr 1g4sgb z;yz(e.tt 1n with the same speed as it had initiallyg11; zegy 4sltt. bz(r 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 7 ds( 6w:pbm8*ba eyghthe same time.

  An object can have nonzero veallu8jzyq+ qhjh7mb. kj3lz 65:98cq locity and zero acceleration at the same time.

  An elevator moving from th7ucm :p.ofz 3 i-q,vv)9pj:ru tufq-ne second floor to the fifth floor making no stops along the way has zero acpu qu7,9uoz n)p- q:v.-tirfj vc:m3fceleration all the time.

  A rolling ball moves from4z; p7y at-zr0v(wpi p $x_1=3.4 \mathrm{~cm}$ to $x_2=-7.6 \mathrm{~cm}$ during the time from $t_1=2.0 \mathrm{~s}$ to $t_2=5.0 \mathrm{~s}$. What is its average velocity?  (数值)  $cm/s$ (only fill in numerical value please)

  A particle at $t_1=-2.3 \mathrm{~s}$ is at $x_1=3.0 \mathrm{~cm}$ and at $t_2=3.2 \mathrm{~s}$ is at $x_2=7.5 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete laps around a quarterft m3a qtuobdaolw*to :i 96f+84p; +k+/sjwo-mile ($1 \; mile = 1609 \; m$) track in a total time of 11.3 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 88 m away in 9.:(al zvp4:xer 7 s. It then turns abruptly and gallops halfway back in 4.5 s:e( :zxra p4vl. 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 from k:a-j mu1)yxt $12 \; m/s$ to $22 \; m/s$ 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 from q a7ttzf-(y,o$18 \; m/s$ to rest in a distance of 79 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reach a s m2* kdqv /xocg/aqv2)peed of $32 \; m/s$ 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 tbwxt+v0n5. g qhe blocks to essentially top speed about bx g 5vt+wnq0.$11.4 \; m/s$ 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 unifomk/g 4 nrv0ex5 *gyr-frmly from a speed of $17 \; m/s$ to rest in 4.68 s. How far did it travel in that time?  (数值)  $m$

  In coming to a stop, a car leaves skid markswfr ka5*gv v+/ 92 m long on the highway. Assuming a deceleration*krgf5v+a w v/ of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck20qqy lc6 ekzxwq0r(qz7 (gk / 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).    $m$