Suppose that an object travels from one point in sp1ezds)iu jy0va1an*q)pbgv+9 63u u t ace to another. Make a compariu +j1ydv v utbq0nsae69)* 3 pa1uigz)son between the displacement and the distance traveled.

  When is the average velocity of .l1 2v bzccpgo7cux(- an object equal to the instantaneous velocity?

  A new car manufacturer advertises that their car can go "from zero to sixtjk i52ttx7xwbji*g 4 7y in 8 s".ibi 7 t752gtx4jkx *jw This is a description of

  An object moving in the +xh5h,tct9 xa p1 axis experiences an acceleration of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to the East (+x direction) ;p;dbi p8h4 jxgx8w:pbegins to slow down as it appip wp8x;;pj :48gbxhdroaches a traffic light. Make a statement concerning its acceleration.

  Suppose that a car traveling to the West (-x direction) begins to slow down as aeb+2bse/h6i it ap62+shae/eb bi proaches a traffic light. Make a statement concerning its acceleration.

  Suppose that an object is moving with a constant velocity. +,jb2zijd2 brjqvto97y +qq8 Make a statement concerning its accelerativ8i+br+bj o2d 927 t,qyzjjqqon.

  If the velocity of an object is zero, does it mean that the acce ro w:ib9jgxe :o0gd,(;;zfckleration is zero? wi;r 9:f g(0, c:dobxz;koe gj Support your answer with an example.

  Can an object's velocity change direction when its acceleration is const: ee- 0ao9et21g21ftlupdzr yant? Support yourr2ptfetlad 10e9eug z o1- 2:y answer with an example.

  Suppose that an object is moving with constant acceleration. Make a d9p:di*e x. nv statement concerning its motion with respe. p edvnx:9d*ict to time.

  Can an object have increasing speed while it 7quf1.4r/ ujt8py4ebp m. vrus acceleration is decreasing? Support your answer with an exampleb48jvp m. qeut r4up 7yru/.f1.

  Suppose a can, after an initial kick, m*5v/xub-v/5lmp yttokoue0 8 oves up along a smooth hill of ice. Make a statement concerning im t toxvv u/o8*p50-y l5/beukts acceleration.

  Under what condition is average velocity equal to the average of the object'cqsvw ji.-d52, nc tf3s initial and final3icjn ,c5 .-vsw 2tdqf velocity?

  Objects A and B both stadnoq:7ljin bw4/ x t d/o95ht.rt at rest. They both accelerate at the same rate. However, object A accelerates/9: lwh7q nd. no ottib/5dxj4 for 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 6v+ v5b32p ,zv; n3jv 50dpyzlzjdy oerate. However, object A accev +5y z5bdv2 ,zzlo;e jv6nv3y03ppdjlerates 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 a :8x tmrae(qkbn-/(b csj+rp;nd falls in the absence of friction, which of tpkm nx cj ((qb-;esrtabr:+/8he following is true concerning its motion?

  When an object is released from rest and falls *ria. py(oz f4,/ o jajm3yo*tin the absence of friction, which of the following is true concerning its motion/ *mj oa3ot.*fy,( oyaizr4jp?

  Suppose a ball is thrown straight up. Make a statement about the velle*fbxu hs-id90b9 unist l f) .q)u,+ocity and t.fsuq09ufhisltu+*b ) b xn)i9,l de-he acceleration when the ball reaches the highest point.

  Suppose a ball is thrqhqy29r4 q d:rown straight up. What is its acceleration just before it reachq ry4hd:qrq29 es its highest point?

  Suppose a ball is thrown straight up, reaches a maximum height, then faljhqz+ ee* x4og9.js)ols to its initial height. Make a statement about the direction of the v+ ehj4g xo9.*eosz)qjelocity and acceleration as the ball is going up.

  A ball is thrown straight up, reaches mj;0jv p +m ob* ykzyy;ub8e)g *ry9c1a maximum height, then falls to its initial height. Make a smgjzk yvyj )+ub*m19c8 0*;e oybpr;ytatement about the direction of the velocity and acceleration as the ball is coming down.

  Suppose a ball is thrown downward in the absence of air o/pbohy(xonpb7m0, 2 resistance. Make a statement concerning its acceleration.,m/ p20oohnb(y7bop x

  Suppose a skydiver ju: le)gf oj6o7vmps from a high-flying plane. What is her acceleration whenv:)j el oo7f6g she she reaches terminal velocity?

  A ball is thrown vertically upward with a speed v. An identical second bal b. ho2b jwv;g5y2v/un0ks:azl is thrown upward with a speed 2v (twice as fast). What is the ratio of the maximum height of the second b 22 zuv0 awv.5ngb;jo/:ybkhs all 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 building. One second later, ball B q/ 4bpaenxz(+pi.tf7 is droppx+ e(if ppazq/bt n7.4ed from the same building. As time progresses, the distance between them

  Ball A is dropped from the top of a building. One second later, ball B is drg4v)z1 sgx:t isahj/4l+ f;nqopped from the same building. As time progresses, the difference in )4hi f/na +:j gg lz1vs4qxts;their speeds

  Two objects are thrown from the top of a tall building. One c3wm,,sburt1 is thrown up, and the other is thrown down, both with the same initial speed. What are their speeds when t,urb3 cw,t 1smhey hit the street?

  A brick is dropped from the top of a building. A sec ui .az.cm34ouond brick is thrown straight zuim 4c 3uoa..down from the same building. They are released at the same time. Neglect air resistance. Compare the accelerations of the two bricks.

  An object is moving with constant non-zero velocity i xt. n8fphgnre8m1+-in the +x axis. The position versus time gramnt1g+88pe rhi.nfx - ph of this object is

  An object is moving with coig99q 2 -wxu-lr fc0oia1on1onstant non-zero acceleration in the +x axis. The position versus tim- ior2cnfu-1a9 wool 19x q0gie graph of this object is

  An object is moving with constant non-zero velocity in the +x azdsg op)res020:) owz xis. The velocity versus time graph of this o2wp: 0go )0sz )zesdrobject is

  An object is moving with constant non-zero acceleration in the +x axis. Thep 5cu m87mg,qb velocity7mcp5,ugqb 8 m versus time graph of this object is

  The slope of a position(-bqlhia;ryq9 7 fvz1 versus time graph gives

  The slope of a velocity versus tp am/vpwka f.1n8f h7-ime graph gives

  The area under a curve in an acceleration versus time graph wvkyj0xf;tq 6i55x8 / zd48hw:j rate gives

  The area under a curve in a velocity7;ywk 6t/ oazd8d tcd, versus time graph gives

  If the position versus time graph of an object is a horizontal line, the ob0fiip4nmi9z2)1m 0le fp6z rzject 0ilpf)mripn0 9z4izzef m26 1is

  If the position versus time graph of an object isi -.oql dw/sb4ny 6g1q a vertical line, the object is6-.wbl1qod/ ng4s qiy

  If the velocity versus time graph of an object is a horizontal lcx grkrrr qln5)41::ulckf5 u-) 6pi line, the object i5) kkrf c:c5u)nl rulpgl r-4q x61r:is

  If the velocity versus time graph of an obje8i+pai 8 cjiqbp:e:9n ct is a straight line making an angle of 30 degrees with the time axis, th9n ::p aipiicje8q +b8e object is

  An object moves 15.0 m north and then 11.0 m south. Find both tc x24+vi*-cu tg)loc8qqbyh l;a)4oohe distance traveled and the magnitu4+al*bc 4qvlo2g) ;- qxco8cuh )yt oide of the displacement vector.

  A boat can move at 30 km/h in still water. How long willw+ zuneal2lu(p+/y uv:e ze55 it take to move 12 km upstream in a river fyw+z 2:p 5eu/(uz5enlvau e+l lowing 6.0 km/h?

  55 mi/h is how many m/s? (1 mi 0j,;xw1swo s l= 1609 m)

  What must be your average speed in or;48kc ezxfqr3 der to travel 350 km in 5.15 h?

  A runner ran the marathon (approximately 42.0 km) in 2 hours and 57 min. What .cvt;14rbke.tp nzg, is the average speed of the runv. ;zttr,g4n .pk1e bcner in m/s?

  A car travels 90 km/h. How long does it take for it to trav+1jjuaa r2w0favh0 m -el 400 km?

  A ly (light year) is the distance that light travels in one yeare x*6fhp ,zw,h. The speed of light isx,,fwp6eh* z h $3.00 \times 10^8 \; m/s$. 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 side foioku yk+b0 x93r 4.0 s, how far do you travel during this inattentiveb9o+0xyik u3 k period?

  If you run a complete loop around an outdoor tv6t w-la.id /;yw qiz-rack (400 m), in 100 s, your average velocity isz.-lt a/ivywd;i6w q -

  A polar bear starts at the Norvt xg* j1t0d :y,mk7qrth Pole. It travels 1.0 km south, then 1.0 km east, then 1.0 km north, then 1.0 km west to return to itqtxgy :rm1d* 7k ,0vtjs starting 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 south,.jo6jqkj+r; f then 1.0 km east, then 1.0 r6kqjo j; f+.jkm north, then 1.0 km west to return to its starting point. This trip takes 45 min. What was the bear's average velocity?

  You are driving home on /sa 7aib 51tq:og*,aenm3sv h a weekend from school at 55 mi/h for 110 miles. It then stas 3ia:/1,5tq* aao7 mhgnves brts 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 a ( myo0 4s)*mmrx.imbqj rl99mten)l2nd 160 km at 100 km/h. What is the average speed of the motorist for this rqm90mn.m lex r sjm)(o4t bm9l*y)i 2trip?

  A motorist travels for 3.0 h at 80 km/h and 2.0 h at 100 km/h. What is her averx3m- jrgef1+* rcqc6 da*rjcmf 3x -e qdr6c+1gge speed for the trip?

  An airplane travels at 300 mi/h south for 2.00 h and then at 250 mi/h x 5bt.r5z,zs/8y a)r nn vg;lqnorth for 7g8r5z t,y;n/a s5q) vb.xnl zr50 miles. What is the average speed for the trip?

  In a 400-m relay race the anchorman (the person who runs the la mgle: wyjd. hd*- ,1r)8yrr *a1phewzst 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 the race, in orz.rmjd *:,g har*p-ewy18hry ld w)1e der that the team A runner not lose the race?

  A car decelerates uniformly and comes to a stop after 8 s. The car's average c fmsv,;p8wu)velocity during deceleration was 67 km/h. What was the car's deceleratiouscp,;8fw mv) n while slowing down?

  An airplane increases its speed from 100 m d5a 7xgpy(kxm*1 ke6c/s to 160 m/s, at the average rate of g*e y m56pkxax(kc7 d1$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h accelerates at the rajy7/ dt)hwj ggxlw,6r54x h e;te 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 ane;lf f+*gsr)4 8uxw o8(afqdfd 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)a/emqbvk -x8/s for 10 s. It then speeds up with a constant acceleration ofx-a/k b) 8mevq $2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial velocity of 6.3 m/s experiences a const.w bx)kld9 of emw38 r+p6 hyowi/;cn3ant acceleration of o+3l /fwm;webhc d8p nwik6.3r)x9 yo$3.6 \; m/s^2$. What is the cart's displacement during the first 8.2 s of its motion?

  A bullet moving horizontally to the right (+x direct/3 5f i po+yp:-;pv w zwv(h/s5rtcyokion) with a speed of 319 m/s strikes a sandbag and iozwf ych/+tv5 : ws(rp5-p;o v3ky/p penetrates a distance of 56.31 cm. What is the average acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is launched from a catapult on an aircraft carrier. It eap0qk k*9ne8reaches a speed of 42 m/s at the end of the catapultaepe0q8knk9 * , and this requires 2.0 s. Assuming the acceleration is constant, what is the length of the catapult?

  A car starting from rest movjt0g z u80h0. ;pnuqahes with 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 rz:/lbotq34p; ek,d y/s in a distance of 200 m. What is its average accep:y/;kdt,bolz4q er3 leration?

  An object starts from rest and undergoes uniform acceleration. During the firs0dy 0i1vm*w al;7qnv gt second it travels 4.9 m. How far will it travel during the thir7qw1vgn;i* 0ma0 dvlyd second?

  An object is moving in a straight line with constant accelerationza /tb 5iccy+q05db+ e. Initially it is traveling at 16 m/s. Three seconds later it q+ce a0t c5bdiybz+/5is traveling at 10 m/s. How far does it move during this time?

  A car starts from rest and a5t ; tom7udxb;ccelerates 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 + as)- p tlkcx;6)vimscan 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 been (hw + (ppakw5nwaiting at the intersection starts ahead with a constant ackw + pah(wpn5(celeration 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 of plantq w4q+ qzu* 1tij9mf2et X where the acceleration due to grav9 wzt41q q tjm2+*iuqfity is $1.5 \; m/s^2$. What is the maximum height reached by the object?

  An object is thrown upward with a speed o7 l c1n/jd0j:rgrqtx:f 12 m/s on the surface of planet X where the acceleration due to gravityrg0 c:rjn ldx: j/q71t 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 planet X (lnglw/62 ( gc fa+xfi ev/9srwhere the acceleration due to gravity is wvlrc2(/sealg/ f nf9(x ig+6 $2.5 \; m/s^2$. How long does it take for the object to return to where it is thrown?

  An object is thrown upward with a speed of(gc my;7+3 *ma t joy5n*ommot 14 m/s on the surface of planet X where the acceleration due to gr(mmc yg**o7y3jomo+m5; t tn aavity is $3.5 \; m/s^2$. What is the speed of the object after 8.0 s?

  Human reaction time ,ivxb/b0 p)wiis usually 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 cati)bvip/,wb0 xch it?

  A ball is thrown upward at a velocity of 19.6 m 30h0 ueg68d(wg7pc ) 2yvx5 wpluu*hcaxty u8/s. What is its velocity after 3.00 s 3p7yw*xvhle2x6)gchw8utu a( 0gd 5u0yup 8c?

  A bullet shot straight up returzl h.hdqeu-jy8e1s-, ns to its starting point in 20 s. What is the initial speed of the bye.e1,--8zjh hudl q sullet?

  A ball is thrown straight uoprz7s7.tu myo pid*jxm, x) 0f:)q*yp with a speed of 36.0 m/s. How long does it take to return to its sjuxp7*omz) ,d:)xpts0*i f y oyr.7 qmtarting point?

  A ball is thrown downward from the top of a builda2 yre-c 31giiyh*rb ,ing with an initial speed of 20 m/s. It strikes the ground after 1.1 s. How high is theyig,ir-*hrby23a ce 1 building?

  A ball is thrown straight up with a spex xtr *+(,88t.hcmeiav0azdl ed of 30 m/s. (only fill in numerical value in the8txzh0i8rmx *( lav ae+c. dt, 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 x;6x 5y.,bt panu xfg8with a speed of 26.7 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 11 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 11.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what is the velocipspc(p /: m9ea x0.fp 0eq-hytty at t = 1.0 s?

  In Fig. below, what is the velocityvzg-9*b61qm hs ma) qc at t = 2.5 s?

  In Fig. below, what is the veloy(tkqki) 2h9 lcity at t = 4.0 s?

  In Fig. below, what is th57qb9fjpmmw, . 4w vjue velocity at t = 5.5 s?

  In Fig. below, what is the avere+dvqz8af f 7)age velocity from 0 to 4.0 s?

  In Fig. below, what ib te* 0s z0ezhottn 2b+27ge)is the average velocity from 0 to 6.0 s?

  In Fig. below, what is the accelerationil5mr zu sggfp40luqa6h m 5 /(o*17ze at 1.0 s?

  In Fig. below, what is the ac1xkkzo: -hbu* ijq 7:3lmp07h h8pcdxceleration at 3.0 s?

  In Fig. below, what isdov(-ayai pi :o, 36ht the average acceleration from 0 to 5.0 s?

  In Fig. below, what is the average acceler*hsm7r jd u6*fation from 0 to 8.0 s?

  In Fig. below, what is the displacement from 0 to 8.0 n. /pk0fn21 7h .qqpjkzigzy2 s?

Does a car speedometer measure speed, vesylnce(f r*q97--zv r locity? {speed|velocity}

  An object can have a varying spee b+mvorgvdin( /+ 1ao/d if its velocity is constant.

  The velocity of an object can be negative when its acceleration i84*nhr 1 *yjmgsfhd520e fi5j tmn-q is positive.

  If one object has a greater speed tha mgmu4+kjd 3d,iag s1.no*td0n a second object, the first must have a gream0 ,td1uags*j.4o +nidk d3gmter acceleration.

  Two cars emerge side by side from a tunnel. Car A is traveling wwl 5m 8hf g63yqe,eviw0s b.l5ith 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 il gv+ey, v(h ab39uvz6ckj )jaw./ m+yn speed as its acceleration decreases.

  A baseball player hits a foul ball straight up into the 41u6h 1al xzv 57tujh:w8rdih air. It leaves the bat with w dz8 hjx6uv57l 1i1a:hurth4a 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 spepklkn9 up 1sn/:;ro /z fk-9sjeds up, what is happening to its acceleration, how does it change if air frknz/p/fn; s-r1k9 9lj ok :uspiction is ignored?

  As a freely falling object speeds up, what is happening to its acceleratiom t efvq+q5spcc+h v)1g.-dc9xz67 gdn, how does it change if air fr+z .mc-vtevfcq h)dcqsxg5 7g6+d1p 9iction CAN NOT be ignored?

  An object that is thrown vertically upward will return to its original po;k)q0ueqz 3ups2fw43x1i7o6b y ak8+ fkqntv sition with the same speed as it had initially if air resistance iv7yq01;+2kbw a4ku83ftnox 6ki e3q fqp u z)ss negligible. If air resistance is appreciable, how will this result be altered?

  An object can have zero velocity and nonzero acceleration at the swj/lbt(5u etl6 rt69y ame time.

  An object can have nonzero velocitveiv m4o1 e/.vy and zero acceleration at the same time.

  An elevator moving from the second floor to the fifth floor making no stop ) 76xcxygl:7e:zylah s along the way haye:llha7xz76: gx cy)s zero acceleration all the time.

  A rolling ball moves fh2 ;e 2k g, cdxpasgfh)sz5u:-rom $x_1=2.3 \mathrm{~cm}$ to $x_2=-5.1 \mathrm{~cm}$ during the time from $t_1=0.9 \mathrm{~s}$ 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 $t_1=-4.4 \mathrm{~s}$ is at $x_1=3.0 \mathrm{~cm}$ and at $t_2=3.3 \mathrm{~s}$ is at $x_2=7.2 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight coacj . 82 wp9jq+gy8td m 9ql8y)mvqqm.mplete laps around a quarter-mile ($1 \; mile = 1609 \; m$) track in a total time of 6.2 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 linx l6/) xty(v 4dn oo;bcjyee))e, moving 95 m away in 8.7 s. It then turns abruptlyo)eb n/ tj) o;e6c()4xd xyvly and gallops halfway back in 4.7 s. 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 fronw* 9(f+g/fedv sp( pam $13 \; m/s$ to $23 \; m/s$ in 4.8 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 iq *l8pe+kjxhj4tu31 $20 \; m/s$ to rest in a distance of 55 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reack7xqt.prp w 7b7n o0gop;ri +/h a speed of $25 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $3.0 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinter can burst out of the blocks to esse- wr 0p lcqdg79/jper+ntially top speed aboutq9g lr 7/cj-d0r+pe wp $11.3 \; m/s$ in the first 12.9 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 uniform v+aab;e0vpf5 ly from a speed of $15 \; m/s$ to rest in 4.43 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.g3u y e ;evdi4fj r*xik*6 5qzeb*n.p) Assuming a deceleration 3 q)xb* fn5d*g ezv.i yp4i;r*jk6eeuof $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck goingzhh4 no7y, y, vjdcz64 $25 \; m/s$ 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 run in less than 30.0 minb80phmz a t-fal+0f /g. After exactly 27.0 min, there are still 1100 m to go. The runner must then accelerate azba ft0/8a m-pglhf0+t $0.20 \; m/s^2$ for how many seconds in order to achieve the desired time?    $s$