Suppose that an object travels from on04qgp/dhrzi b9 xwl0 n.p :t7fe point in space to another. Make a compariso 0hl0if/pz 9twd :rx.p74qbngn between the displacement and the distance traveled.

  When is the average velocity of an ob( tos,pt) m9lwject equal to the instantaneous velocity?

  A new car manufacturer advertises that their car can u,;n dw88a 78itoo efjgo "from zero to sixty in 8 s". This is a description of uae ofo d8;j8w78itn,

  An object moving in the +x axiscsb*0q ehgbv0r 0 q *b3o1gq. ptn1,lr experiences an acceleration of $2.0 \; m/s^2$. This means the object is

  Suppose that a car travelimfgx7 p8u:tx7 ng to the East (+x direction) begins to slow down as it apprp7 txu:f7m gx8oaches a traffic light. Make a statement concerning its acceleration.

  Suppose that a car traveling to the West (-c iueg, e1t3mb-nv 0h.pkg(n9x direction) begins to slow down as it approaches a traffic light. Make a stath-kuniee m,cgv png (. 9013btement concerning its acceleration.

  Suppose that an object is moving with a constant velocity. Make a statb/pkd9 c3, mhtzp / :tb6i2vzwement concerning its a: itzb6 tkd/h3,p /v2bw9zm cpcceleration.

  If the velocity of an object is zero, dj)(w*/6 ,t jag:ksesj nbu,wp oes it mean that the acceleration is zero? Support your answ,t s g)ejj ps a*,w/j:6knw(uber with an example.

  Can an object's velocity change direction when itst .lr do7y;ys+ acceleration is constant? Support your answer with an exy.7 ly tsodr;+ample.

  Suppose that an object is moving with constant acceleration. Make a e+ w 7ama71sjz statement concerninwm7 1aj7szae+ g its motion with respect to time.

  Can an object have increasing speed while its qs61ts f b 9nva0:mvg5acceleration is decreasing? Support your answ ms gf0 vbnaqts516:v9er with an example.

  Suppose a can, after an initial kick, moves up along a smoot)k k2a5 cqqctnu0p7 26pz4rgmh hill of ice. Make a statement concerning tpma4k )r kc52q0q 6nug7pz2cits acceleration.

  Under what condition dr:f+ n /ilanklo/ kt;hc3 iat170*il is average velocity equal to the average of the object's initial and final veloca rki7 l+ 01k/hfo tltl/ca*indi3n:;ity?

  Objects A and B both start at rest. They both accelerate serd9.h5zpifp8;a2ckj-ck ,6wrw e ( at the same rate. However, object A accelerates for twice efa6p(c 5j29wi;p 8dzk sr wh.cer-,k 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 atncuriwlv.: fh 77mh,zr4y :)p the same rate. However, object A accelerates for twice the time as object B. What is the distance traveled by object A compared to that o h.lzu4):,fcm :7viywr hr7npf object B?

  When an object is released from rest and falls i g*9 pl 2+yvhzp8(lznz(y j4aqn the absence of friction, which of the following is true concerningy*p ygazh4 j8 9(pqz2+vlz( ln its motion?

  When an object is released from rest and falls in the absenceg kqykc-l7l4p/ 3sw z+ of friction, which of the following is true concernqsplg yz4-wclk+k /3 7ing its motion?

  Suppose a ball is thrown straight 34 trtpjqxea0;y+gl 3up. Make a statement about the velocity and the acceleration when a3t g+t0qj3 y l;4xrpethe ball reaches the highest point.

  Suppose a ball is thrown straight up. What is its ar 3ag68m nd p7wak-o)mcceleration just before it reaches its highest point?mpm 6)8akga- nod7w3r

  Suppose a ball is thrown straight up, 4,6:4/j vp njez,poiv*oex d nreaches a maximum height, then falls to its initial height. Make a statement about the dinxdo 4v46 ezn/,j*:opp jv,i erection of the velocity and acceleration as the ball is going up.

  A ball is thrown straight up, reaches a maximum height, then falls to its i 3 h9,twdcou*7.joun wnitial height. Make a statement about the o*.cjwdu,nht7uw9o3 direction of the velocity and acceleration as the ball is coming down.

  Suppose a ball is thrown downward in the absence of air resistance. M.rism 1q pj cd1gh;.eoa0)z3vake a statement concerning its acceleratiocvhe.3ap; gijz) sd rmoq110 .n.

  Suppose a skydiver jumps from a high-flying plane. Wesjpz50k8 1ah hat is her acceleration when she she reaches terminal ve01phjz s85kea locity?

  A ball is thrown vertically upward)bx 3z,9nvmoq b,y p.w with a speed v. An identical second ball is thrown upward with a speed 2v (twice as fast). bpx) v93zy q ownb.,m, 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 building. One second later, ball b.3pyiygw.p,e .cm)kB is dropped from the same building. As time progresses, the distance betwewmei,3pb kycg .p).y.en them

  Ball A is dropped from the top of a builcv.:s9. k;vbxk s c6rj/prkq:ding. One second later, ball B is dropped from the same building. As time progrr c pk6: .ksrjx .qc/v;bs9vk:esses, the difference in their speeds

  Two objects are throwf*vdr8;3ey(,6 xuf7t; vpm rbe rb,jan from the top of a tall building. One is thrown up, and the other is thro;frme ,8 e ;v7pxv,( 36b jutbr*dfarywn down, both with the same initial speed. What are their speeds when they hit the street?

  A brick is dropped from the top of a building. Aydk 4i pqk)sb,xe x) 6ej-;yc0)lw5sv second brick is thrown straight down from the same building. They are released at the same time. Neglect air resistance. Compare the accelerations of byi)sx-0k)5c ,vd xsqlw;je4 )pey k6 the two bricks.

  An object is moving with constant non-zero velocity in the +x axis. The p s;90lof0- mis/:p wpdgxn7twosition versusofsd7p9n0gmsw:lx-w ;p 0t/i time graph of this object is

  An object is moving with constant non-zero acceleration in the;2lan7w :tk8r75 qrldjdh 0u 5ev;rnn +x axis. The position versus time graph of this object dwklln5u;; 2rr8hean57:7 jtnr0qvdis

  An object is moving with constant non-zero velocity in the +x axi-a-xin,u b3sss. The velocity versus timex -susi- n,3ab graph of this object is

  An object is moving with constant non-zero acceleration in the +dnm 68v 1 f*:9qjmwjdwx axis. The velocity versus time graph of tm *vmj8f9dn wjq:w6 1dhis object is

  The slope of a position versus time graph fm( ezxieuweam1a/4+cz: 2 h7 gives

  The slope of a velocity versus tb1wgj t,bnwz3wv6kwt-; 61 jtime graph gives

  The area under a curve in an acj-2ngs1 lsl 6qceleration versus time graph gives

  The area under a curve in a velocity versus time graph ;+hr v hw+hfp/qv 8o8kgives

  If the position versus time graph of an object is a horizontal line,ea;e6nztcx/ -i;-r 1wjv1m b8fmui :f the object isie1 wmtr m;ef6ba-u:zv1n c/jfx -8i;

  If the position versus time graph objd(b+c j3- ncf an object is a vertical line, the object is+cdb n3( jb-cj

  If the velocity versus time grz tai(ml:r;5 baph of an object is a horizontal line, the object is5mi; alz:rb(t

  If the velocity versus timeo0 ,46s jwhdtb graph of an object is a straight line making an angle od0ws jb ,4h6tof 30 degrees with the time axis, the object is

  An object moves 15.0 m north and then z7;f xpm9 u/x2t.2whi ixpxpsdj.h9/11.0 m south. Find both the distance traveled and the magnitude of th /j/f9 mi2pws2 ;iut. .9pxzxhx x7pdhe displacement vector.

  A boat can move at 30 km/h in still water. How long will83bd ct+d9 gul it take to move 12 km upstream in a river flowing 6dutb g+9c3l8 d.0 km/h?

  55 mi/h is how many m/s? (1 mi vrp:u62z vv irgw0n.:ty6a w9= 1609 m)

  What must be your averagjx)yf1d jmqf j+gv+ il-46j ro9j.fg6e speed in order to travel 350 km in 5.15 h?

  A runner ran the marathon (approximately 42.0 km) in 2 hours and 57 min. Whadk l9q;o. )saot is the average so ;q.dok9sal) peed of the runner in m/s?

  A car travels 90 km/h. Hob9bn1:k nuh: tw long does it take for it to travel 400 km?

  A ly (light year) is the distance that light travels in one y8 8lus,nl(/oixi(y e eear. The speed of l nl88y u(es x(iil/e,oight 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 (,a k/w. vutgdjz;om4km/h along a straight road and you look to the side for 4.0 s, how far do you travel during this inwa (jzugt./ , m4ovdk;attentive period?

  If you run a complete loop around an out* v12ie zbpm6hnhi28ddoor track (400 m), in 100 s, your average velocity* i dhihenvz2pm8b 612 is

  A polar bear starts at the North Pole. It travels 1.0 km south, then 1.0 km eay2ywp,zc6*vc- u :lhest, then 1.0 km north, then 1.0 km west to return to its starting point. This trip takes 45 min. Whah cw*ev p-zc2yylu6 :,t was the bear's average speed?

  A polar bear starts at the North Pole. It travels 1.0 km soutv39kk) su r4ylh, then 1.0 km east, then 1.0 km north, then 1.0 km west 94vk3rulsyk) to return to its starting point. This trip takes 45 min. What was the bear's average velocity?

  You are driving home .xzepc3 3opol,ax3-kymb8e e( n*x/u on a weekend from school at 55 mi/h for 110 miles. It then starts 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 schoo3mxyulo-e pnc ./px8a3beokz3*e x(, l?

  A motorist travels 160 kmjs 5 )1q2itmux at 80 km/h and 160 km at 100 km/h. What is the average speed of the motor1 m2sjxtiq 5u)ist for this trip?

  A motorist travels for 3.0 h at 80 km/h and 2.0 h at 100 fl3+ru;+iu jskd +v+k4f/co,y4 oqgj w x 1je7km/h. What is her average speed for the tripj+3uok1f++gy ekqvcwls o j+uf4 xjd;4/ i7r ,?

  An airplane travels at 300 mi/h south for 2.00 h and then at 250 mi/h nxv sa . syb.+2+)ejjcce9ty z1orth for 750 miy)te+eb z.+ c9jssax1. c2j yvles. What is the average speed for the trip?

  In a 400-m relay race the anch:tcgz 6)7c t 48.lpmqeotvf1 db9iut3orman (the 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 runner can have when the team A runner starts the final leg of the race, in order that the team A runner not lole6o4t 7g 1fctu3pb9qm cid)8zt t.:vse the race?

  A car decelerates uniformly and comes to a stop a+q0 mi-o3wenn a.b5f ,0tjttv fter 9 s. The car's average velocity during deceleration was 55 km/h. What was the car's deceleration while slowingm.v3 tt q oe+,nafn0jiw0tb-5 down?

  An airplane increases it1w pli9-1f)mgn t.xnj(q4vjp s speed from 100 m/s to 160 m/s, at the average rate of 9 vpf11iw tnpm.ljnj -4()xg q$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h accelerates at the rate ofm,x-3as*n 9 x a5khqxj $2.0 \; m/s^2$. How much time is required for the car to reach a speed of 90 km/h?

  A cart starts from rest ancnoo1j /8 2wn:8b2 unno8g ayid 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/s for 10 s. It then s j*;z3d:syebspeeds up with a constant acceleration ofjdz:ys*3se; b $2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial velocity of 4.4 m/s experi2n/ajq7x *)tvf r)x qxences a constant acceleration o)xxq)j2rxn fv*qa 7t/f $3.8 \; m/s^2$. What is the cart's displacement during the first 6.1 s of its motion?

  A bullet moving horizontally to the right (+x direction) with a speed of 58,thsb(f i*d x-;7buztqo)ga-tmmd 4 33 m/s strikes a sandbag and penetrates a dzd bm,tf h(*touis 8 t7mb; qd4-axg-)istance of 12.71 cm. What is the average acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is launched from a catapult on an aircrafhq,8h q7do2jgep1* gdt 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 cons8d,*qph1e 2ghgjd7 oq tant, what is the length of the catapult?

  A car starting from rest moves with constant acceleration 8 u1 g9h4pj1oznbnq a3of $2.0 \; m/s^2$ 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 m7tffe. hwtrzb 1vn -)mq8e2m7. What is its average accwvmm-rnt 8f1b f)7tez .2q eh7eleration?

  An object starts from rest and un)t j. ;1wixggdxn fz-vgn7s 2:dergoes uniform acceleration. During the first second it travels 3.7 m. How g 7g gi1xvj:n).-s;fxnzwt2d far will it travel during the third second?

  An object is moving in a straight line with constant acceleration. Ini n*pdt,xdwsxv33q u,:tially it is traveling at 16 m/s. Th vs3udx d:3,qtn,xw *pree seconds later it is traveling at 10 m/s. How far does it move during this time?

  A car starts from rest and accelerates 3uyrno s0 /sq.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 lisbx rk-*:g(t -rsj;a dry 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 traffi.spuhvlt8duu w a6 +(9c light turns green, a car that has been waiting at the intersection starts ahead with a constan.wlsuuud a8+vh 9t6 (pt 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 witsuh*+.snahh vp8 ii. x6+agh 3h a speed of 12 m/s on the surface of planet X where the acceleration3 hs 8pa6.s ginvxuh ai.h*h++ 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 speed of 17 bzw .qn)ep/u2 m/s on the surface of planet X where /nzbew .u7 qp)the 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 sp yzk.ul83l kc bvfka*;j*rhs 6b+( 26qmr gi6xeed of 15 m/s on the surface of planet X where the accelerationqxc (6ia+zh ;.ljk* 28g63 yv k6ukbr *lfrsmb 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 bnukb8lsm6t*fi k*jv)ri77 , of planet X where the acceleration due to gravit7jlr*bi u)fn6 7iv 8m ktk*sb,y is $3.5 \; m/s^2$. What is the speed of the object after 8.0 s?

  Human reaction time is usually greaterv) +b5mds(07krutz2fqw xjdn2 z u))f than 0.10 s. If your friend holds a ruler betwewd)m2zszk20 x)tur f f jvbd+5nqu7()en 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 a30wf q 6.c2o ,wbcioaof 19.6 m/s. What is its velocity after 3.00 ,qib cwoo3. a2wc6fa0 s?

  A bullet shot straight up returns to its starting point in 8 s.dlg49sjeft jd;9; rt 35g iv4z What is the initial sp jt5dg;ti 99vj4 ;3se4frzdgleed of the bullet?

  A ball is thrown straight up with a speed of 36.0 m/s. How long does ew9om )tzbaw5z.iz( ;it take to return to its sbw t e.o5)m(9zzzwai;tarting point?

  A ball is thrown downward from the top of a buildiv4l9+-ry ) zfkwy.wnf ng with an initial speed of 23 m/s. It strikes the ground after 1.9 s. How high is the b9 wfwyfl.z)nyk-+rv 4 uilding?

  A ball is thrown straight up with a speed of 30 m/su4. 5smtvx mi lt+sj28ul6bl). (only fill in numerical value in the v)s6 u8xi5l4tllj mt. bmsu2+ 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 tkjy : du 4(,6c(nc/haul0jwrjhe air with a speed of 38.6 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 2 seconds later.  (数值)  $m/s$
(e.) Determine the time at which the ball pass a point 15 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 15.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what is the vel hzz,r2-nx. mhocity at t = 1.0 s?

  In Fig. below, what is the velocity i 9 pharjh5p+ iqce1+ vbhh6cgy(u520 at t = 2.5 s?

  In Fig. below, what is the velocity at t = *4 vzyt nd)qzf4 4o7mu4.0 s?

  In Fig. below, what 6 fst q3l/+ncuis the velocity at t = 5.5 s?

  In Fig. below, what is the average velocity k t73wxnayf 2d ut-2.) ymew*dfrom 0 to 4.0 s?

  In Fig. below, what 6gp q3i8ajf0zv( o7k mis the average velocity from 0 to 6.0 s?

  In Fig. below, what is the acceler fy2iby13bl8c ation at 1.0 s?

  In Fig. below, what is the acxk4).a v1-3hbgv + pl; wejnjiat+2acceleration at 3.0 s?

  In Fig. below, what is t;zyz el/,t0 tfhe average acceleration from 0 to 5.0 s?

  In Fig. below, what is th;ul /tnmv ;r0pe average acceleration from 0 to 8.0 s?

  In Fig. below, what is the dd7v (h,gdq/wh wy1a u,isplacement from 0 to 8.0 s?

Does a car speedometer ys bu+7fotg( )measure speed, velocity? {speed|velocity}

  An object can have a varyin2 rlkxy;a :y6 f*iuge0g speed if its velocity is constant.

  The velocity of an object can be negative when0och+b8 k,w i;3 nrtyjgcfs49 its acceleration is positive.

  If one object has a greater speed than a second object, the first must hu /xt97x+ b*h butb7ab6z ujl3ave a greater accej7u*bt/htl9b xxa bu367+ubzleration.

  Two cars emerge side by side from ;f ;.m ez/9f jxhqfxy1a 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 it k+ vhlp+*qass1 9mnf-1s t+w;pvx:gis acceleration decreases.

  A baseball player hits a foul ball -4sfklb - 5*ssk d*fkbstraight up into the air. It leaves the bat with a spee-d*f bkk5s -s f4*kbsld 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 acceled6 gh ji2 oy3gil/; qlv,8ph:jration, how does it change if air frict8 lo 3hij:d/ qlp g26gjihy,;vion is ignored?

  As a freely falling object)y*0wum3g k4p:ekc u o speeds up, what is happening to its acceleration, how dom3 upokyu w)kecg:0 4*es it change if air friction CAN NOT be ignored?

  An object that is thrown vertically upward will return to its original position g/2w4wizu 8 dowith the same speed as it had initially i uzw /i248ogdwf air resistance is negligible. If air resistance is appreciable, how will this result be altered?

  An object can have zero velocity and nonzero acceleration tybo2xzl 0go7 b7,n(wat the same time.

  An object can have nonzero velocity and ldl.j7 f by+c;zero acceleration at the same time.

  An elevator moving from the second floor to the fifth floor makingai1;q af h5kn9 no stops along the way has zero acceleration all the t n1;ihkaf9qa5ime.

  A rolling ball moves fro /e+vpc 5g+1matq vqffn :80flm $x_1=2.5 \mathrm{~cm}$ to $x_2=-6.4 \mathrm{~cm}$ during the time from $t_1=2.3 \mathrm{~s}$ to $t_2=6.0 \mathrm{~s}$. What is its average velocity?  (数值)  $cm/s$ (only fill in numerical value please)

  A particle at $t_1=-4.7 \mathrm{~s}$ is at $x_1=2.9 \mathrm{~cm}$ and at $t_2=3.9 \mathrm{~s}$ is at $x_2=8.0 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight compi3 xgekee7q6 kf2nf :xu6j-.klete laps around a quarter-mile ($1 \; mile = 1609 \; m$) track in a total time of 10.8 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 apx6n0et ni b3:tdb.e6 straight line, moving 100 m away in 8.3 s. It then turns abruptly and gallops halfway back in 4.6 s. Cal.nb x0t 66pni 3ed:ebtculate (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 froyep1:u ccf+0zm $12 \; m/s$ to $24 \; m/s$ in 5.7 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 /1ef 4qimpikrm-7 s1r $20 \; m/s$ to rest in a distance of 62 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reach a speed om(mek a540g9gg6 u, a1rutckrf $32 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $2.6 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinter can8qp -0bt.l eus burst out of the blocks to essentially top speed about80e.t- lbsuqp $10.9 \; m/s$ in the first 12.6 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 uni.6 .tkwh1/ wxs+ cfeaoformly from a speed of $17 \; m/s$ to rest in 4.24 s. How far did it travel in that time?  (数值)  $m$

  In coming to a stop, a c +u5ag9ajsl.* zh sx)aar leaves skid marks 92 m long on the highway. Assuming a decla+ gxa.*)u h9zj5 ssaeleration of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck going6+a)1 6 bkrcucgh8hil ovhg 7+ $25 \; m/s$ 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 cofi6r:)xhcse 9 mplete the 10,000-m run in less than 30.0 min. After exactly 2:)ie sx9rc hf67.0 min, there are still 1100 m to go. The runner must then accelerate at $0.20 \; m/s^2$ for how many seconds in order to achieve the desired time?    $s$