Suppose that an object travels from one point in space to anotheqy- ,nrz8b /xar. Make a comparison between thb q-xn,a/yz8r e displacement and the distance traveled.

  When is the average velocity ofdf(5ay(0bqr6;p2tzbk(s 2 vfff7ucx8hf/e k an object equal to the instantaneous velocity?

  A new car manufacturer advertises that thl n b:zlaf o18we*m5s4eir car can go "from zero to sixty in 8 s". Thisbaz5f84no e lwls: m*1 is a description of

  An object moving in the +x axis experiences an accelera7 )b3ad .qgv/vh*jeygtion of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling je23:us ;jfw:w .ld zuto the East (+x direction) begins to slow down as it approache :uzwjfldu ej;.3:2wss a traffic light. Make a statement concerning its acceleration.

  Suppose that a car traveling to the West (-x direction) begins to sgpjf8x5 s,ke f-y0ye1z,h h5 vlow down as it approaches a traffic light. Make a statement concerning its acce50kfj evse yz 15yhfxp,gh-8,leration.

  Suppose that an object is moving with a constant velocity. Make a statemeesy 1/i he/vr5pj 9203* *owsf dhrefwnt concerning its acceleratifj 21/ios5*rh/3rwy e*se dh9epvf0 won.

  If the velocity of an object is zero, does it mean that tv :e*7dbs ro0j8s5neahe acceleration is zero? Support your ae bn05ar7*d8s s: ejovnswer with an example.

  Can an object's velocity change dir svcm+dd+v0;a4e4b,kt ld/fg ection when its acceleration is constant? Supporebdcvgdvl f ;kt04+4sad/m+, t your answer with an example.

  Suppose that an object -aya0d 5aj8q nis moving with constant acceleration. Make a statement concerning its motion with respect to tj0n-dya a q8a5ime.

  Can an object have incremx ge ;a t*sz;ckq0,7vasing speed while its acceleration is decreasing? Support your answx;vckq0 7;t*m,z gase er with an example.

  Suppose a can, after an initial kick, moves up along a s9q/k*h/b 5h q yqaxztw.dz vly2;7p*lmooth hill of ice. Make axpy; 9 dqk.a5*lb hv /lz*tq zq2/h7wy statement concerning its acceleration.

  Under what condition is avyqdt21a5 dd2 bfqi) i;erage velocity equal to the average of the object's initial and finaf;a 2bt1)ddydqq2 i5il velocity?

  Objects A and B both start at rest. They both accelera(fg:t1ntd rt(4d3 t 7ek200p xldgfoj te at the same rate. However, object A accelerates for twice the time as object B. What is the final speed of object A compared to that of object B d:e(1ntl(0dtg347od ft kjtgr2pfx 0?

  Objects A and B both start from rest. They both ac)o mmniiv k8acw 6tg(0q;9o:zcelerate at the same rate. However, object A accelerates for twice the time as object B. Whaig im) ;mc9:q8zkv(6tan0 w oot is the distance traveled by object A compared to that of object B?

  When an object is released from rest zzqe y zm1h lj:4qq16+and falls in the absence of friction, which of the following is true concerning its mo q4q+1h myjqlezz16z :tion?

  When an object is rele ,jxny ;1p3e v:hh7skvased from rest and falls in the absence of friction, which of the fsp1 3 7,h ey:;xnvjhkvollowing is true concerning its motion?

  Suppose a ball is thrown straight up. Make a statement fxp4af:f k(v/ about the velocity and the acceleration whenfaf :fkv4xp /( the ball reaches the highest point.

  Suppose a ball is thrown straight up. What is its acceleration just o b,/ 9qmn4xkd hcv3b9before it reaches its higodm, 3b/vn b4xhqk9c9 hest point?

  Suppose a ball is thrown dws3r-/r+k kj straight up, reaches a maximum height, then falls to its initial height. Make a statement about the direction of the velocity and acceleration as the ball is going uw j-rk+/k drs3p.

  A ball is thrown straight up, reaches a maximum height,;i7vtg s*y4ji then falls to its initial height. Make a statement about the direction of the v *47y iis;vjtgelocity and acceleration as the ball is coming down.

  Suppose a ball is thrown downward in the absence yx0)/rln( w6aywc+te of air resistance. Make a statement concerning its accelerayc6l)w+wn (ey x0at /rtion.

  Suppose a skydiver jumps from a high-flying plane. What is her acceleration whgb-q cs5 nm;r p;/)6 g+f 8dnu*lpvtdien she /g qtpdr ;lc;ug) bspdn6fm+ -ni8v 5*she reaches terminal velocity?

  A ball is thrown vertically upward with a speed v. An identical s qpk0 c43d0mk sdj;s(it(t3dkecond ball is thrown upward with a speed 2v (twice as fast). What is the ratio of the maximum height of the m d;t0 pd(k0ti k(dcjss3qk43 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 building. e (h wy lehi0. n92hch/)red y)o8z:va One second later, ball B is dropped from the same v aeon idh(h8z / y2y:)wle9)ec.hh0rbuilding. As time progresses, the distance between them

  Ball A is dropped from the top of a building. One second later, ball yh:;ag .beu0 rd(i 0baB is dropped from the same building. As time progre;rh (0ygue.b aib:d a0sses, the difference in their speeds

  Two objects are thrown from the top of a tall building. One imx -9 ky8vm 7v8 e/+nrydzg/phs thrown up, and the other is thrown down, both with the same initial speed. What are their speeds when they hit the kv 7 d y/ 9gmhpr8nm+zye/-v8xstreet?

  A brick is dropped from the top of a building.u9 s, to6;ze7p pxo4mf A second brick is thrown straight down from the same building. Thm f upo,p6 4xezot9s;7ey 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 in the +xl ey 0v)33gu) 9yihb2rgnfsx + axis. The position versus time graph of ehyxi32n g b9+u3)r0gsyvlf)this object is

  An object is moving with constant non-zes23 ulth;n*z xt1qxe:yu+n; cro acceleration in the +x axis. The position versus time graph of tx;uuyx zc+: lnshn;tte*1q3 2 his object is

  An object is moving 7(il hou2b 21nca lsp+ p0ziw:with constant non-zero velocity in the +x axis. The velocity versus time graph of this ob7w u p1ls+ilpo(:2bhnc0ai 2z ject is

  An object is moving with constant n63fv z +ml*jy(z;ex7 xifpa+ f(y; yzoon-zero acceleration in the +x axis. The velocity versus time grapxy*7(yfj(oz x;6fa z;pl vz3mf+y+ eih of this object is

  The slope of a position versus time graph qkidbcx p152bl/ug-+2dlos10b an r / gives

  The slope of a velocity versus tv 2n ie30 mn9;s2x0thnttd4liime graph gives

  The area under a curve in an accel;+z5qn ( wev,ur/fg+vw lw(queration versus time graph gives

  The area under a curve in a velocity versus time graph5)3b+mi7 y :w3df5elgmxb 9.3kidgy ksn ta7 n gives

  If the position versus time graph of an object is a horizontal line, ,k(hs /+sz) y uk5khy64rigd wthe object iy6h5i/yu(4 w) sk shk+zdg,rks

  If the position versus time graph of an ob9dva q-ireb4 w: qdiqyzi3e48rl0g7 7ject is a vertical line, the object is73qy-:za7 igq44wvi dqdr9el b r i08e

  If the velocity versus time graph of an object is a horizontal line, the ob +3v jl l,i.nmq6te/wxject i v+let j.i,wlnx63/q ms

  If the velocity versus time graph of anm;y:x7zgzm, -rc9s , igvv d5a object is a straight line making an angle of 30vd miyz9r;g a:-c,mvg5,s7 zx degrees with the time axis, the object is

  An object moves 15.0 m north and then 11.0 m south. Find both the distance tratov, /w qsol: v q;.lbo*b+.xeveled and the magnitu o,o/qls ;eox .+.: vvwbql*tbde of the displacement vector.

  A boat can move at 30 km/h in still water. How long will it t o;/.ebia8prfq7j 8y,z7v rg fake to move 12 km upstream in a river flowinggbyf7;7pj8a/z.rqfer, v i 8o 6.0 km/h?

  55 mi/h is how many m/s? (1 mraq;s 6brt.+ fi = 1609 m)

  What must be your average speed in ordsk+fbq-rb/un o.v / ( :vdmmnyc6we3. er to travel 350 km in 5.15 h?

  A runner ran the marathon (approximately 42.0 km) in 2 hours and 57 min. Wrrb.1pisd8q01nwd0 hy ;f u,qhat isqd10;f1dr 0 ,r8 .qyibhunpsw the average speed of the runner in m/s?

  A car travels 90 km/h. How long dru jjj8c1b+u 4va:(yaoes it take for it to travel 400 km?

  A ly (light year) is the distance that light travels i,hco k0v4x pggo +rz(6n one year. The speed of light p4 v+kh,zo(og g0rx c6is $3.00 \times 10^8 \; m/s$. 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 vppc0 b,rlr,v4nmt 2,for 4.0 s, how far do you travel dtb4v p 0,,l r2mvcnr,puring this inattentive period?

  If you run a complete loopms81 xwhq+2qstq ),ww around an outdoor track (400 m), in 100 s, your average velocityq+)xw s2qtw ms8q,1 wh is

  A polar bear starts at the North Pole. It tra 6wbl/4 gs7hmja7, mqtvels 1.0 km south, then 1.0 km east, then 1.0 km north, then 1.0 km we bms7 wqgtjh6 mal,47/st to return to its 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.tjxd7 cmy4+szs6m 21l 0 km south, then 1.0 km east, then 1.0 km north, then 1.0 km westj cs7+y6tl 2x1 smd4zm 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 sc kxh1jcqjg)5/hool at 55 mi/h for 110 miles. It then starts to snow and you slow to 35 mi/h. You arrive home after 15 )cqgjx/jhk 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 100 km05ucgivj*6 c8mqa , vt/h. What is the average speed of the mvv*ga i0u 6qmj8c5,tcotorist for this trip?

  A motorist travels for 3.0 h at 80 km/h and 2.0 h at 100 km/h. -m rp1cnemg0 i+p-7dgWhat is her average speed10p7 -r +gpndicemm g- for the trip?

  An airplane travels at 300 mi/h south for 2.00 h and then at 250 mi/h nory (+bgm 4dd/mrth for 750 miles. What isd+(m/r4dgy bm the average speed for the trip?

  In a 400-m relay race the anchorman (the person who runs the last 100 mwe peqa;av+9 b. .u6ut) 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 large 9+wqat u.ab6p;eu .evst 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 11 s. Thal 4 2o5tn-1e fqh5++t*ps6s/sfne c 6rbwnihe car's average velocity during deceleration was 67p5fa +srnit 15h s4ol6e enh q/fs*b2nct6- +w km/h. What was the car's deceleration while slowing down?

  An airplane increases its speed from 100cepj;a2ix4j1 f 3i v)b m/s to 160 m/s, at the average rate of xj4e bi)va ;if2j31 cp$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h a0wi1stm8ejed9z. 9j 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 accelerateg3fly u+bot -/s 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 with a constap (:+6p.wuegk aua6f jnt acceleration of .a j 6ugf (+ape6kpuw:$2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial velocity of 1.1 m/s e pgs qvb+;,s r0ea9st1xperiences a constant acceleration of 1 9,qsbsg +ae 0sprv;t$1.8 \; m/s^2$. What is the cart's displacement during the first 5.8 s of its motion?

  A bullet moving horizontally to the right (+x direction) with a sxw7s*nhjnb6*wqs : 0c.ue,qs peed of 303 m/s strikes a sandbag and penetrates a distance of 62.23 cm. 7w sneq*6cs0* wnb :h xus.q,jWhat is the average acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is la1jz,mq )zij9m0sjam -unched 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, w)1,9azm0j jijmqm -z shat is the length of the catapult?

  A car starting from rest moves with constant acceleratps,7t;f c0n 6crkc6 rt4s4ir a/9ggtvion 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 distanccm(fmr ( tu9 ih/ qdzvk.fr0)+6g/f vwe of 200 m. What is its average accewvr+dq) u /c tm(mf vhfrig9(z06./kfleration?

  An object starts from rest and unde8pmhl6/v7w jnrgoes uniform acceleration. During the first second it travels 2.0 m. How far will it travel during the third seconhp6l jn8 /mwv7d?

  An object is moving in a straight line with constant acceleratioo/: l0q ,usr1;m wahkrn. Initially it is traveling at 16 m/s. Three seconds 0oh l/u w;m,1rsqkar:later it is traveling at 10 m/s. How far does it move during this time?

  A car starts from rest and accelerates uin-p+l9 q+a(tkc/ayfniformly 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 r gjse p2ym: v+h.a-6mhoad 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 light turns green, a car that has been wait2)m dl ,vaqhe*ing at the intersection starts a),ed*lhaq2v mhead 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/kd7j49iz,pgd -g9 o+fuz5yigs on the surface of planet X where the acceleration due+yo7z4 df-pjgi9 g,9kdzg 5iu to gravity is $1.5 \; m/s^2$. What is the maximum height reached by the object?

  An object is thrown up-szldh. ;fnu z8:l 4syward with a speed of 12 m/s on the surface of planet X where the acceleration due to gravity i :hs-f l8ynl.zsz ud;4s $1.5 \; m/s^2$. How long does it take for the object to reach the maximum height?

  An object is thrown upward with a spee0;v myire: .zxd of 15 m/s on the surface of planet X where the acceleration due to .:yv exz im;r0gravity 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 :o-c kya+6 gkkspeed of 14 m/s on the surface of planet X where the acceleration due to gyok+6 cka:g-kravity is $3.5 \; m/s^2$. What is the speed of the object after 8.0 s?

  Human reaction time is usually greater-xvt-;1a (cqj.s j cxx than 0.10 s. If your friend holds a ruler betwexca-(1.jxcxv ;t q -sjen your fingers and releases it without warning, how far can you expect the ruler to fall before you catch it?

  A ball is thrown upward at a velocity of 19.6 m/s. What is its velocity afterzysg2-2oc c enc0rx j(y1mf 1, 3.y2cfcm(gc xr z,ejn0-1 o 21sy00 s?

  A bullet shot straight up returns to its starting point in 8 s. What is the inioum h4ojy 773m.vrr c8tial speed of the myjo7 8cv ohmr 4r37.ubullet?

  A ball is thrown straight upvf4k)7pwpo0: h ubh0l with a speed of 36.0 m/s. How long does it take to return to its startinh :pupv407 w lfh0k)obg point?

  A ball is thrown downward from the v p(0hv5 ms.mhtop of a building with an initial speed of 24 m/s. It strike (ps5v0vmh hm.s the ground after 6.5 s. How high is the building?

  A ball is thrown straight up with a speed of 30 sk3ecx f2 -bq/m/s. (only fill in numerical valu qec/ 2k-x3sfbe in the 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 sdatzv tx)d ;-.c: /ghctraight up into the air with a speed of 43.6 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 1 seconds later.  (数值)  $m/s$
(e.) Determine the time at which the ball pass a point 7 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 7.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what uh597gwzz uts y sm:16is the velocity at t = 1.0 s?

  In Fig. below, what is the velocxjo:/yr9mt oe0o(f pw:i, mr.v403lllv0ilc ity at t = 2.5 s?

  In Fig. below, what is the ve,xlk30ofiiky 1haw * 4locity at t = 4.0 s?

  In Fig. below, what is the velocirlgj57pd;e a6 xyr;/qty at t = 5.5 s?

  In Fig. below, what is the average velocr gesfjx :px.r0v )kz+( 4rb)dity from 0 to 4.0 s?

  In Fig. below, what is the agzk(hiq(z1le qvu373y ejq:9verage velocity from 0 to 6.0 s?

  In Fig. below, what is the acceleration 7(w(*k ww;bjt*x gutq at 1.0 s?

  In Fig. below, what is the acceleratiz3q +8x eoxrmhoy6qw;k+0qrd*x. +mmon at 3.0 s?

  In Fig. below, what is t/f yz(f;:ixq81rt/ njzf aw .qhe average acceleration from 0 to 5.0 s?

  In Fig. below, what is the average acceleration from 0 toigx2z :ti6hsg7 qcklm4(z d4 * 8.0 s?

  In Fig. below, what is the displacemen hmmf+;ze3cxw c6cec,9/)lw lt from 0 to 8.0 s?

Does a car speedometer measure speed, velocity? {sqq;bov,a u/ou 6b tu01peed|velocity}

  An object can have a varying speed if its velocity is conuytx ck. ip(7q j /:*9.xxfasustant.

  The velocity of an object948ob 0fejj ce can be negative when its acceleration is positive.

  If one object has a greater speed than a second object, h33de2 yu mvq*the first must have a greater acceler* 3mqudhv 2ye3ation.

  Two cars emerge side by side from a tunnel. Car A is traveling ae akq/5h/(ag q(joa(ce : bs/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 acceleration decrease4br4bg8 inx4a f-+ dats.

  A baseball player hit 4zlxvc v)l;rfsf5b- .s a foul ball straight up into the air. It leaves the bat with a speedfrv;zb s4f .x-)5cllv 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 to its accelerati-wis)4br vx46xp6 gywon, how does it g-p s xvbwriw)4x6 y64change if air friction is ignored?

  As a freely falling object speeds up, what is happening to it8 1q ggc13scsrpq 9/els acceleration, how does it change if air friction CAN N ec1 pql/39c1g8rsg sqOT be ignored?

  An object that is thrown vertically upward 3 qe,x 8,7rmbe 2kqlhewill return to its original position with the same speed as it had initially if air resistance is negligible. If air resistance is appreciable, how wil8q3,lqx2k h ere,m7ebl this result be altered?

  An object can have zero velocity anrqfxcuq0c+ :c3yof-. d nonzero acceleration at the same time.

  An object can have nonzero ver: h dfbeiypv7 *+1*zclocity and zero acceleration at the same time.

  An elevator moving frogjqdm:0x3 q6w m the second floor to the fifth floor making no stops along the way has zero acceleration all thxg:jdq6w03 qme time.

  A rolling ball moves frommoab(:zuo8ux +t t1*k skjj** $x_1=3.2 \mathrm{~cm}$ to $x_2=-6.4 \mathrm{~cm}$ during the time from $t_1=0.9 \mathrm{~s}$ to $t_2=5.5 \mathrm{~s}$. What is its average velocity?  (数值)  $cm/s$ (only fill in numerical value please)

  A particle at $t_1=-4.6 \mathrm{~s}$ is at $x_1=2.1 \mathrm{~cm}$ and at $t_2=3.1 \mathrm{~s}$ is at $x_2=7.7 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete laps around a quarter-mnkff(0 e8-ydc ile ($1 \; mile = 1609 \; m$) track in a total time of 9.5 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 linet) , t*lun3;frdw6hxk, moving 113 m away in 10.6 s. It then turns abruptly and gallops halfway back in trth),6l k d;3fun *xw4.6 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 from g+q)7crfiuof k- 8j gq p9tv20*mln:uo1e .hh$12 \; m/s$ to $24 \; m/s$ in 5.9 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 a+x g2 bw/2i)comz v8x$18 \; m/s$ to rest in a distance of 69 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reach a speed of kkvtlbr71+yde- -uo je-y0m5 q.f /nj $28 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $2.4 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinter can burst out of the blocks y ,iety6x7qy8xq7 z 5 +xdmvz5to essentially top speed aboui,yt+ 5 7ex6yqzy5qxz7 xmdv8t $11.3 \; m/s$ in the first 14.5 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 f:o;owvpu dsv kq: hdw e5u-md* 031x8a speed of $20 \; m/s$ to rest in 5.27 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. *m g:p*s qfl*hAssuming a:p * *sh*qfmgl deceleration of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck goinr4 6i9 z.4e eijybin0+rxz bk6g $25 \; m/s$ 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 min. q6 b17(klfzbt a03m)3ierrc hAfter exactly 27.0 min, there are still 1100 m to go. The runner must then accelerate at 6bh03m7fl1t qk3(ircre)abz$0.20 \; m/s^2$ for how many seconds in order to achieve the desired time?    $s$