Suppose that an object travels from one point in spa9ij e.x0:dss;i2csld*i mq+ fce to another. Make a comparison betwi;x dmes*jl0ds 9iqs.cf+i:2een the displacement and the distance traveled.

  When is the average velocity of an object equal to the instantanwip kf)5m :* (fxogz)9ydlz y/eous velocity?

  A new car manufacturer advertises that their car can go "fr(5sv r okg16,hjf(tx uom zero to sixty in 8 s". Th j(kth,o6(xr1us v g5fis is a description of

  An object moving in the +x axis experienceukig 1 l:n/df9s an acceleration of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to the East (+x dirk0f ov 7o6fqp l3oj*6mection) begins to slow down as it approaches a traffic light. Make a statement concerning its acceleratifo7pf 6koom 6lj3q0*von.

  Suppose that a car travelin / suejsm2,rx-g to the West (-x direction) begins to slow down as it approaches a traffic light. Make a statement ex u ,2sm/rs-jconcerning its acceleration.

  Suppose that an object is moving with a constant velocity. Make a fyvig9k8rs;cdu ;t4o 2-kqd,statement concerniq9, d v 24-ydfg uks;8ktoi;rcng its acceleration.

  If the velocity of an object is zero, does it ) v6ogn h;+mjgmean that the acceleration is zero? Support your answer with an example.nm+vog) jhg;6

  Can an object's velocity change direction when its accelerat dv/2zibxm;osu /l k7w)o5u t;ion is constant? Support your answer with an exam2 d/mul57bz ;/xukitwovso; )ple.

  Suppose that an object is moving with constant acceleration. Make a vpdj9 -)m tccd b+ mr9og7hpi0p(uxa7 d..8wrstatement concerning its motion with respect to 9m p)vpdxdo.mi-+r97g8d(7c 0pwc. hrb tuja time.

  Can an object have increasing speed while its acceleration is decio7)39i mzbarxt8 s*e reasing? Support your ansx9t8mz a3* 7)oiersi bwer with an example.

  Suppose a can, after an initial kick, moves up al7 * x6:4ky5strpukrj 0 -lrgdtong a smooth hill of ice. Make a statement concern -p jr:6xkg 7r40ysrk 5td*luting its acceleration.

  Under what condition is average velocity equt9 dg/b7kchh,al to the average of the object's initial and finalcbd,/t 7gh 9kh velocity?

  Objects A and B both start at rest. Theel0rs)gw4ra8+2(2; v e f4atyir vdcoy both accelerate at the same rate. However, object A accelerates for tw 2e;4i erfs+ogv2tcr8ayv 4 rda0()wlice 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 bbc oak,a( o,,qoth accelerate at the same rate. However, object A accelerates for twice the time as object B. What is the distance travele,,,oabqc (oka d by object A compared to that of object B?

  When an object is released from rest and falls in the absence of friction, wreywk v+4i v-yr95 y(dhich of deir(k9 5+yr 4wyvvy-the following is true concerning its motion?

  When an object is released from rest and falls in the absence of f4(*gac nkvg:a riction, which of the following is true concerni4n g*vc(k:ag ang its motion?

  Suppose a ball is thrown straight up. Make mq9fn *x mm8*m0jal5h a statement about the velocity and the acceleration when the ball reaches hm5* fmj m08amqnl*x9 the highest point.

  Suppose a ball is thrown straight up. re;vqh r6 zhg64c/wd-0v ot f+What is its acceleration just before it reachesrhge6 d4 vt+rw-h6oc0 q;vz/f its highest point?

  Suppose a ball is thrown straight up, reaches a mautc: +(vd/ xiv zu;z;iximum height, then falls to its initial height. Make a statement about the direction of the velocity and acceleration as the ball isiuit:v d(vx;+ ;uzc/ z going up.

  A ball is thrown straight up, reaches a maximum heigh fb6 w7.m5du jks9ni7zt, then falls to its initial height. Make a statem9576nms.kwuzdbij f 7ent about the direction of the velocity and acceleration as the ball is coming down.

  Suppose a ball is thrown downward in the absencq/z mrzp,b7gg0 )czs.e of air resistance. Make a statement concerning p z.gcz/z sq r7m0b)g,its acceleration.

  Suppose a skydiver j9 jacg.ve*d3s0ji eb,umps from a high-flying plane. What is her acceleration when she s0c9j.b 3sadvjg*,i ee he reaches terminal velocity?

  A ball is thrown vertically upward with a speed v. An identical second ball is lg/ gw /tqjjuqfq+b6 *t2/ ri0throwb0tuqqj/*2+f lg/ wig6q/ tr jn 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 than the first ball?)

  Ball A is dropped from the tq auyclg6q 8 qf89a5:9zrf1fnfv.4m lop of a building. One second later, ball B is dropped from the same building. A cfa 68 9 nq:va1fuygz9q8.m5fq4lrfl s time progresses, the distance between them

  Ball A is dropped from the top of 3a -wfz(k y/bo;4*8 ekaww9rjmncqi-a building. One second later, ball B is dropped from the same building. As ti/9; w eij(mbf ao-a3ky4c8w- kr znw*qme progresses, the difference in their speeds

  Two objects are thrown from the top of a tall building. One is thrown up, dd-gdkx52c 9qand the other is thrown down, both with the same initial speed. What 5 c9d-x gqkd2dare their speeds when they hit the street?

  A brick is dropped from the top of a building. A second brick is o0(b9qimg c;cs3ar)lthrown straight down from the same building. They are released at the same time. Neglect air resistance. Compare the accelerations of the two brickm asg;o)3 lcbri0 (c9qs.

  An object is moving with constant non-zero velocity inkavug:;lxpcm8(),p l the +x axis. The position versus time grup pl;c 8:kax(mlg)v,aph of this object is

  An object is moving with constant non-zero acceleration in the +x l ):j:kono oj8axis. The positio jookj :8nl):on versus time graph of this object is

  An object is moving with constant non-zetwz u -gnhb+*;m.1 mtl6ees4rro velocity in the +x axis. The velocity verh16 g+s t.*ewme- nuz 4bmrtl;sus time graph of this object is

  An object is moving with constant non-zero acceleration in the i62/ydbg wfsfobyms, wb, y, + 9gr4m6+x axis. The velocity versus time graph of 6y b+s,fwmmfibygo,dwbg2 s946r, / y this object is

  The slope of a position versus time grapd r))zej ct4: ve+v c(m1xa7rah gives

  The slope of a velocityb3 sfs ds+hj o6q38b(c7m3ya b versus time graph gives

  The area under a curve in an acceleration versus timhl2r 4 g9csgo3t5q0ye6xy -g se graph gives

  The area under a curve inj7u, (.p ps 4x5*aibmq4in4c pyw.mvy a velocity versus time graph gives

  If the position vers5v;0lua5hvip v.rra-us time graph of an object is a horizontal line, the object is. p v;5ralhvr05vu ia-

  If the position versus time graph of an object is a vertical line, the objec yd(4xg ww6 r s;7w9/xnw2ofk( nan1rnt isd o;4w2(fykn n17ww 6 x/9( nwxsnrgar

  If the velocity versus time graph of an object is a horizontal line,22 nz*dijtf msz(3 n;d the object is*;d2 3 ndtim2 nfzs(zj

  If the velocity versusbw qkk(0(f xxgyr) 73h time graph of an object is a straight line making an angle of 30 degrees w )yxf0(hg7 k rbw3(xkqith the time axis, the object is

  An object moves 15.0 m north and then 11.0 m southy82..jhmo vx b. Find both the distance travele8. o 2vhbjmxy.d and the magnitude of the displacement vector.

  A boat can move at 30 km/h in still water. How long r9h5s d gk1dlqj+)0xyhp8 i5w 0nfdk1will it take to move 12 km upstream in a river flowing 6.0 pds5h9xirkl1ddk w10f+5n8 ) 0 j yghqkm/h?

  55 mi/h is how many m/s? (1 mi = 1yjert9yg0ivn 2mkga c +u(jk/0z28 y,609 m)

  What must be your average speed in order to travel 350 km in 5.q ddbl9(f,p ,o15 h?

  A runner ran the marathon (approximately 42.0 km) g 6fdht*jys(d(ge58pin 2 hours and 57 min. What is the averad fyt 5hdg egp(s*j8(6ge speed of the runner in m/s?

  A car travels 90 km/h. 673c4 vuh+/7o qya0bah+q n mo3crzlfHow long does it take for it to travel 400 km?

  A ly (light year) is the distance that light travels in one year. The spuftfb3 2 n j)(kq5p6rpeed of light fp) j t nprk65q(bf32uis $3.00 \times 10^8 \; m/s$. 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 /7)2neha5 gigkf kw1land you look to the side for 4.0 s, how far do you travel during this inattentive peri)5 i1a72kkf /hgwg lenod?

  If you run a complete loop around an outdoor track (400 m), in n 3vjk2apz*/h q1qet( 100 s, your averag(kn3hazeptq2 1 *vq /je velocity is

  A polar bear starts at the North Pole. It travels 1.0 km south, then 1.0 km easp qd3dc: +7uo/ls- 9bkxwf-okt, then 1.0 km north, then 1.0 km west to return to its startingb -k w oqp:-7 /ldo+df9u3xskc point. This trip takes 45 min. What was the bear's average speed?

  A polar bear starts at the North Pole. It travels 1.0 km soe( 4 nd1vefsq;uth, then 1.0 km east, then 1.0 km north, then 1.0 f(q4 de1en v;skm 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 11 ( bp0t;7 svigc4jgf8g0 miles. It then starts to snow an 04j (ggs8b;ftg cpvi7d 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 10-z y 1 fao+f:.zpgra4d09kqlp0 km/h. What is the average speed of the motorist 0:kd9 -fpzq.4+l1fgroaz pa y for this trip?

  A motorist travels for 3.0 h at 80 km/h and 2.0 h at 100 (c ss.x:,un((wuejqd 5f9dfj1 zd,4f lgcux3 km/h. What is her average spe: .34xfl(fescujng w (jdd (z u9,cud 1x,q5sfed for the trip?

  An airplane travels at 300 mi//9lb poh6 43qpjyk,d(yzg ne4h south for 2.00 h and then at 250 mi/h north for 750 miles. What is the average speed for the trip?kj e4 ydo4qh(6 zgl9 ppy,3bn/

  In a 400-m relay race the anchorman (the person who runs the last 100 m) for fz itpv71(yi-.bsu 7fh+ n3d iteam 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 the race, in order that the team A runner not loseiif+yz 1n7(d7s-ivfbptu . h3 the race?

  A car decelerates uniformly and comes to a stop after 10 s. The car's aveac /(ge*y hta(f6-msl rage velocity during deceleration was 51 km/h. What was the car's deceleration while (t /flsecam g(y*ah6-slowing down?

  An airplane increases its speedeg) ;15,z ewb maai-exf;of*r from 100 m/s to 160 m/s, at the average rate of -xwa ezmge;i;ea1)bo , * fr5f$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 kma lg6dm :j3 4nxdxwaj//mj//r/h 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 acceleratey8evjr1 gcwg42z. py1s 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 spee rib+5 j gz -+y8-3 xlef-3wvwdtonb+zds up with a constant acceleration of g---+ +n+ ret wzyxl8fwdib ov 53bzj3$2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial velocity of 6.6 m/s experiences a constan av k3s06whrug pl8. vno73t8st acceleration o3ar3 l7h t0nswk8sv u6g. pv8of $3.0 \; m/s^2$. What is the cart's displacement during the first 7.9 s of its motion?

  A bullet moving horizontally to the rid,1vrc ((cd1fbe0 ds shqk0 t0ght (+x direction) with a speed of 577 m/s strikes a sandbag and pen tkc( d,vfhs(sc1bed 10qd00 retrates a distance of 53.16 cm. What is the average acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is launched from a catapult on an aircwrxi-id l/o7h z7+p6 qraft carrier. It reaches a speed of 42 m/s at the end of the catapult, and this requires 2.0 s. As76+rd -i/ p7oxliqzhw suming the acceleration is constant, what is the length of the catapult?

  A car starting from rest moves withe; xsyrlk spbt08rr :qq/y4/y8)l q, k 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 averagdb)3bjxf3he )e accelxbe jfh b33))deration?

  An object starts from rest and undergoes.g*g0e(+c dnh3ef b7 :/akr i rmxji9s uniform acceleration. During the first secorx:ad f g0+hmknb ie7 ci. 3*jgs9/er(nd it travels 2.7 m. How far will it travel during the third second?

  An object is moving in a straight li:(2foim7fd tu 8ozor4 ne with constant acceleration. Initially it is traveling at 16 m/s. Three seconds later it is trave2zfiu(romf7 o o:84dtling at 10 m/s. How far does it move during this time?

  A car starts from rest and acce+ce5x ,8nvk tmlerates 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.:.4jjsyrkeb 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 li*rnds+:b ;is tght turns green, a car that has been waiting at the intersection starts *+b:t;s nrdsi 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 surfa z.jlw:w1z;z +noo2obd c0d a-ce of planet X where th:a wjc2b d0zoodw;z.z ol1+n-e 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,z(qtbt60bgw) gsh c6 speed of 12 m/s on the surface of planet X where the ac6wt(g)b ,h6bgzs t0 cqceleration 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 mqc:m7 1cdm;dq b w:e/c/s on the surface of planet X where the md:c; 1db/eq mw7:ccqacceleration 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 upwardnp3k-o1n:ads5s:tk i with a speed of 14 m/s on the surface of planet X where the acc pd:stnan5:1 s-o 3kkieleration 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.txxg mlw/m.hde;jj6a*1ei1wo0 e 3. x If your friend holds a ruler between your fingers and releases it without warning, how far can you expect the ruler to fall .jx3t1dx1.je egai 0hmw*oe/ x m6l;wbefore you catch it?

  A ball is thrown upward at a velocity of 19.6 m/s. What is its velocity aftere1*zsakl2 qq j c9)z7r3u t1lg 3.00 s?31asltrqe7)1g z*k2q9 jc ul z

  A bullet shot straight up returns to its starting point i(az+q -fq.da gxx )+s/ i esrbcut*-y)n 14 s. What is the initial speed of the bul.xq) sg* b+xc-zut- eya adf)sq+i/ r(let?

  A ball is thrown straight up with a speed of 36.0 m/s. How l/f:qn1n-jig4 f/ lijw,f p1blong does it take to return to its s/b1i/1 j:il q4pgnjlff -nfw, tarting point?

  A ball is thrown downward from the top of a building with an inygbtt 99d.1f p ;ww lgjl.1bq5itial speed of 15 m/s. It strikes the ground after 6.7 s. How jwl lg1yg;bd1.qw9. 9pfb 5tthigh is the building?

  A ball is thrown straigr kze:/8eibj) ht up with a speed of 30 m/s. (only fill in numerical value in t:e)ez kbri /j8he blanks)
(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 sk tot8nmgnk,n-d.ebn;c q+ ::peed of 34.1 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 9 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 9.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what is the velocido0 hpuh1(n 8uty at t = 1.0 s?

  In Fig. below, what is the velzad,6lkxrw :+ocity at t = 2.5 s?

  In Fig. below, what is the veku hjs ju/fhr3cg 29+zd j;::llocity at t = 4.0 s?

  In Fig. below, what ia.9bpkexb :j+s the velocity at t = 5.5 s?

  In Fig. below, what is the aven,*ih(lbu ul-rage velocity from 0 to 4.0 s?

  In Fig. below, what is the average veloc ,x.1gk9i 9)a o/cp6zx f j5otswinl(nity from 0 to 6.0 s?

  In Fig. below, what is the4nk2*gh na iuue7 )5zk acceleration at 1.0 s?

  In Fig. below, what is the acceleration at 3.0 g3omo; +pn,dq+m y4ufs?

  In Fig. below, what is the average acceleration f2umf8hb,ko) mib2 k.p rom 0 to 5.0 s?

  In Fig. below, what is the av5ic5lqxn7 2a.rwha ( cerage acceleration from 0 to 8.0 s?

  In Fig. below, what is the displav8f oqc43ah2cvla / yg6 yh2gbip6 -1acement from 0 to 8.0 s?

Does a car speedometer measure speed, velocity? -z+ x;jiacw 6z r*idokr o;k60{speed|velocity}

  An object can have a varying speed if its velocity.azsxzpt6 u jt649m;l is constant.

  The velocity of an object can be negatiq;8 vk7nxe q8wve when its acceleration is positive.

  If one object has a greater speed than a second object, the first must have a hzs4 gf,3go: lgreatersfggh ,:oz 3l4 acceleration.

  Two cars emerge side by side from a tunnel. Car A is traveling with a speen*v(kzvf 64 dgd 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-lrcq 6gk3u y0 in speed as its acceleration decreases.

  A baseball player hits a foul ball straight up into l9zhnqv+x)s2 the air. It leaves the bat wsq +h2 xz)lnv9ith 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 happening as;;h72x3t dd qvwl4kto its acceleration, how does it change if air fsqdd2l7 ;hx ;waktv34riction is ignored?

  As a freely falling object speeds up, what is happening to its accelerati*wekcy, vs e r, d5j2ap2gf,7qon, how does it change if air a*2ey ,,c5swq2v , rkpgdf7ejfriction CAN NOT be ignored?

  An object that is thrown verticall 3ucwclk( 1ak6*( vavey upward will return to its original position wia( kca*v3 6kv(1clewuth 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 nonzero rb8 b042r/fdyn.zqh holm(l(acceleration at the same time.

  An object can have nong/x)au77cdaj:m-qep3--nygi e d 0 kezero velocity and zero acceleration at the same time.

  An elevator moving from the second floor to the fifth floor making no stops alon1;3wign bqqw7zi.x emc00; jb g the way has zerj0.1 qen03 q ;7xwwc gbi;zibmo acceleration all the time.

  A rolling ball moves f 1*fk/pa o , f,zyz;1rtcnc o5g2yrqo5rom $x_1=2.0 \mathrm{~cm}$ to $x_2=-4.4 \mathrm{~cm}$ during the time from $t_1=1.0 \mathrm{~s}$ to $t_2=5.7 \mathrm{~s}$. What is its average velocity?  (数值)  $cm/s$ (only fill in numerical value please)

  A particle at $t_1=-3.0 \mathrm{~s}$ is at $x_1=2.8 \mathrm{~cm}$ and at $t_2=3.3 \mathrm{~s}$ is at $x_2=8.4 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete laps around a qu ifjr66,z/ cxjarter-mile ($1 \; mile = 1609 \; m$) track in a total time of 6.0 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 line9v4olobo)u8 x0lrsc9, moving 104 m away in 11.8 s. It then turns abruptly and gallops halfway back in 4.6 s. Calculate (s9vbrxo4)o98 lc 0u loa) 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 e pz)intbf vzqq2g)y ,+/ x*q;$11 \; m/s$ to $24 \; m/s$ in 5.3 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 from ml)0 wvi:hep *vla- 8k$16 \; m/s$ to rest in a distance of 75 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reac/qbn.tz d 9wm y1(pie2h a speed of $25 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $2.7 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinte3i (x89 mhpjd3 *oxqunr can burst out of the blocks to essentially top speed abou o3inp (3dxqh mu8j9x*t $10.9 \; m/s$ in the first 11.2 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 o,ce7e5y sgmg* f $20 \; m/s$ to rest in 5.31 s. How far did it travel in that time?  (数值)  $m$

  In coming to a stop, a car leaves s8 7c-y h4)yurukz, wi0evw0 dukid marks 92 m long on the highway. Assuming a decelerr)0 k 04uu v,dywe8u y7wzihc-ation of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck going nz71pue m: ncu20puq1 $25 \; m/s$ 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).    $m$