Suppose that an object travelqyi v5fo o0h1a26v48dtv0su- rjsxr 9s from one point in space to another. Make a comparison between theta-4o265y siq osr8xf vu9v v10hjd 0r displacement and the distance traveled.

  When is the average velocity of an object eqzw n qb75,bczy;c,1 ojual to the instantaneous velocity?

  A new car manufacturer iaqsoel22otd1 tttv ;g) ; z/;advertises that their car can go "from zero to sixty in 8 i t o; e qtz/tl2vd;1s);gaot2s". This is a description of

  An object moving in the +x axis experiencjynm v2 (2jhjr5dt w479fkv4hes an acceleration of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to the East (+x direction) begins to slow down ax x);-.zv .qpwbpmq2r s it approaches a traffic;z q-qw.prvxb2)p .x m light. Make a statement concerning its acceleration.

  Suppose that a car traveling to the West (-x direction) begins to slow vngm8hnsm( 7 ql5e1i6dm3tz; down as it approaches a traffic light. Make a statement concerning its m31me s; 78 vm h5ndit(ln6zqgacceleration.

  Suppose that an object is moving with a constant velocity. Make a statebzlh )5:a9u sdbnw5ka :l4ol0h9 )ewzment concerning its accenk5lw 509:49wabl hb asuo)hlzz e ):dleration.

  If the velocity of an object i4 jrjreil1z o,4yj7x2s zero, does it mean that the acceleration is zero? Support yi71e4 jr2jox, 4 lzyrjour answer with an example.

  Can an object's velocity change direction when its xeyh n4k53r-o:lt+ut acceleration is constant? Support your answer wi k4u3reh-no+lx tty5:th an example.

  Suppose that an object is moving with con4f:xj,fev . naqyn8 +xstant acceleration. Make a statement 4xf8q ny.a:xjfen + ,vconcerning its motion with respect to time.

  Can an object have increasing d9w( pn19cr1jx*1psvln c a(h speed while its acceleration is decreasing? Support you n1lawp dnrp(91j ch1s*9(vxcr answer with an example.

  Suppose a can, after an initial kick, moves up along a smooth hill of ice. Makefb y/f1s.z y1f a statement c1zsf.f by/y1f oncerning its acceleration.

  Under what condition is average velocity equal tx yuvab+ga:) 9 b2ux2xo3/grv o the average of the object's initial and final velocitg32xy+aoba9b xgv :)/x2r uv uy?

  Objects A and B both start x xsnwa dq 8;cew)d.de5564z iat rest. They both accelerate at the same rate. However, object A accelerates for twice the time as object 4xz5wx esi.wcqan)d8e;dd6 5 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 rattv3of5v0c5jeluc eh)qzs +1 6imh 0q5e. However, object A accelerates for twice the time as object B. v55fuv0hem6zcj5c )iqqlhso 3 1te0+ What is the distance traveled by object A compared to that of object B?

  When an object is released frb t2m3u01zb xrom rest and falls in the absence of friction, which omxrb0 b3 u12tzf the following is true concerning its motion?

  When an object is released from rest and falls in the absence of friction,.u,75o cjkgnb0ugffyvz)z.1 which of the following is true concern,.yo)71nuc5 f fb.g ju zvg0kzing its motion?

  Suppose a ball is thrown straight up. Make a statement about the velodl. bg0vtb q50city and the acceleration when the ball reachv 0.ldqbg t0b5es the highest point.

  Suppose a ball is thrown straight up. What is its acceleration justvbg65l 4/jth e before it reaches its highest po jv56/bl4tgeh int?

  Suppose a ball is thrown strai57u( 2+jmflga ;qg wicv nv8/xght up, reaches a maximum height, then falls to its initial height. Make a statement about the direction ofqmna2xj75g/w(ui 8cl+vvfg; the velocity and acceleration as the ball is going up.

  A ball is thrown straight up, reaches a maximum height, thej; emmp 1.jcm2n falls to its initial height. Make a jjp;m1.m 2cmestatement 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 resistance. Make qjcp, o43qr8:vsmh 6ma statement concerning its accelerqsjm4mv 3 r:qo6hcp,8ation.

  Suppose a skydiver jumps from a high-flywoyq y 2s:0oq/ing plane. What is her acceleration when she she ro0 yw/ qyqs:o2eaches terminal velocity?

  A ball is thrown vertically upward mgarkrdf 99 2h02)* tm4bs w q.hs,ayewith a speed v. An identical second ball is thrown upward with a speed 2v (twiwsme0m sha,h9bar g)rkf2d94 .ty* 2qce 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 -m 4i/ v*dzxgftop of a building. One second later, ball B is dropped from the same building. x/d m 4vz-igf* As time progresses, the distance between them

  Ball A is dropped from the top of a building. One second later, balvo*ifhqpp;j*q96+(u(j etxqe qs87xl B is dropped from the same building. As time pr;(*pq+qpu 9 to fs6qqhvie jej( xx7*8ogresses, the difference in their speeds

  Two objects are thrown from the top of a tall building. n 04 yd/1gzysdOne is thrown up, and the other is thrown down, both with the same initial speed. What are their speeds when they hit the streetz/401gsdny dy ?

  A brick is dropped from the top of a building. A second brick is thrown km;7hyyg zz2 s ctl1p;y2r-t2straight down from the same building;hrz 2 7- sytycm1 k2ytpl;2zg. 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 in the +x axis. The positiomgfu72qp p.9k)5u d mfn versus tim).pfd 5 2u9qgpmukf7m e graph of this object is

  An object is moving with constant non-zero acceleration in the +x axis. The poso , .dltlg3i)ulycl +(ition versuslg+otl c3d( iy)l.,u l time graph of this object is

  An object is moving with constant non-zero velocity in the +x axis. The vejkf, bnfd6:84yn t0b vlocity versus time graph of this object6f0nv,f4 tnk b jb:8dy is

  An object is moving with constant non-zero acceleratio r5b-p4g( c5 uo3ggdzqn in the +x axis. The velocity versus time graph of tpc 5 gg3-r4zdb( 5uqoghis object is

  The slope of a positioe9bwy 1r d2f)un versus time graph gives

  The slope of a velocity bwlv 7,wp606v p4jzxh versus time graph gives

  The area under a curve in an accelsqx mt9qm j+h :oxl)./;m5afseration versus time graph gives

  The area under a curve in a velocity versus time graph gi1 :itxc 7km b x6yc39,;lwgipsves

  If the position versus time graph of an object is a horizontal line,-c -hul e348gr-c- 9omus nqutdr k56i the object l k3gordn-cec9s -6h4-m rit-u5q8uuis

  If the position versus time graph of an object is a vertical line, the object i x)dw ktik9d 7ujv;8g2sgkx9wvjkut 2)7d8; d i

  If the velocity versuqvpmr 67 -q(tcxd i5v1s time graph of an object is a horizontal line, the object isvqmtq6 d-x 75vi1 r(pc

  If the velocity versus time graph of an object is a straight line making an anvlm isa64:n7eq3b i ,bgle of 30 degrees with the time axis, : imn7le34i6aqsb,vbthe object is

  An object moves 15.0 m north andxqxd--0e o6 bbfcu 42a then 11.0 m south. Find both the distance traveled and the magnitude of the displacement vectoru-06ab4 xe-xdo q cfb2.

  A boat can move at 30 km/ zzp7-o +qdwa2et12ri qg+o7d z ahzuz1 w(;8lh in still water. How long will it take to move 12 km e7;pzwth+z2zd +1aq qwrglao2u z81 z7d i(o-upstream in a river flowing 6.0 km/h?

  55 mi/h is how many m/s? (1 mi = 1609ulqdh,o/ sj3iw m 3cxo(a v(5) m)

  What must be your average speed in ordezvd9bqpk3/)tyu:q 04) -k k ujkzgb c7r to travel 350 km in 5.15 h?

  A runner ran the marathon (approximate2v0 2 oz+0dqhvtrnl3ply 42.0 km) in 2 hours and 57 min. What is the average speed ovv0qloz np2h2d3 0 +trf the runner in m/s?

  A car travels 90 km/h. How long does it take for it to travel 400 kmbv k z 6 we1ano2zf4w46cyr/e5) jxlu/?

  A ly (light year) is the distance that li-m:qu3c3b rlr ght travels in one year. The speed of q:b-3 lrrcum3 light 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 km/h along a straighttkkjydyk k p7x8:;k4p-6d0e )bdm73ui3 zmmy road and you look to the side for 4.0 s, how far do you travel during this inatte0k3kjmi7xy ;put dd-6y 4ykp mbz7dme38:kk)ntive period?

  If you run a complete loop around an outdoor track (400 m), in y*yiass)hm1kw:0x6 d 100 s, your average ve:my) h s1is*awxkdy0 6locity is

  A polar bear starts at the North Pole. It travels 1.0 km south, then 1.0 krp ceodnk gdd(5h5/0+ m east, then 1.0 km north, then 1.0 km west to return to its starting point. This trip takes 45 min. What05hk5d ddneo cp(rg+/ was the bear's average speed?

  A polar bear starts at the Nort+8iovs m lk4 ;*fobq/oh Pole. It travels 1.0 km south, then 1.0 km east, then 1.0 km north, then ;8q4+oibs/* ofvolkm 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 a weekend from s vi;v4dac4u1l chool 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.vcl v;d u144ia How far is your hometown from school?

  A motorist travels 160 km at 80 km/h and 160 km at 100 km/h. What ispxv5d 3l2khd7p -yg 0wtxc)d/ the average speed of the motorist for ty)kxddt-7xcg52 lp v/0hp3w d his trip?

  A motorist travels for 3.0 h at 80 km/h and 2.0 h at 100 km*x81( 0rniaov njwm 8x/h. What is her average speed fvox8ani1m08wj* xrn( or the trip?

  An airplane travels at 300 mi/h south for 2.00 h and then at 250 ,g.muhj/, q agy))jzpmi/h north for 750 mip, )j/m hq,jg)gyz.uales. What is the average speed for the trip?

  In a 400-m relay race the anchorman (the person who runs the last 100 m) for tw3jeo* ad4w/zwh3 wf +ma.4q team A can run 100 m in 9.8 s. His rival, the anchorman for teaq3dfw4jt4ah wme.+3z a/wo *w m 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 lose the race?

  A car decelerates uniformly and comes to bi*vae vgtt15+:.ohxa stop after 11 s. The car's average velocity during decelerati tvv5at:hb. gix+eo *1on was 68 km/h. What was the car's deceleration while slowing down?

  An airplane increases its speed fr ot.t3vrp+vsfz5 :r6u om 100 m/s to 160 m/s, at the average rate of sp3rt:5 v. v rfuzo6t+$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h accelerates at t/h6p.x ox l,sthe 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 accelerates atvo ;ax(j3t;vg, wvw q2 $4.0 \; m/s^2$ 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 12 i etv9j6we n3h-o*mr0 s. It then speeds up with a constant acceleration of n 9 etvmj rieh3o6w2-*$2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial velocity of5 : /safaybva0 7.2 m/s experiences a constant acceleration of b05af/sa av:y$2.9 \; m/s^2$. What is the cart's displacement during the first 9.2 s of its motion?

  A bullet moving horizontally to the right 5cx i(v6u hp:z(+x direction) with a speed of 368 m/s strikes a sandbag and penetrates a c z pui5(:hx6vdistance of 12.94 cm. What is the average acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is launched from a catapult on an aircrp.bz.t0dl lynuj6b , 6aft carrier. It reaches a speed of 42 m/s at the end of the caz.j n lpyb.u,ltd6 b60tapult, and this requires 2.0 s. Assuming the acceleration is constant, what is the length of the catapult?

  A car starting from rest moves with 1 ,tdab+9bticltpf bpf) 0,)a 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 apw u1 p8m2vrbhfdy*t,a9lgy0 yhas /2f8c0s9verage accelera *fpy1l/ mh 2ycvhfgp 0bad us88ws,2tr 9y09ation?

  An object starts from rest and undergoes uniform acceleration. During tye8 ao5y rr3lq0p,xd/ro y+6phe first second it travels 5.1 m. xd/qlryppoo3+ya, 8ryr 0e56 How far will it travel during the third second?

  An object is moving in a straight line with const1m 2so jc ;e1zz7s;qxmant acceleration. Initially it is traveling at 16 m/s. Three seconds later it is traveling at 10 m/s. How far does it move duri2;mms7zx1so j ezcq;1 ng this time?

  A car starts from rest an(.-/ijv (gt 2fzd yuhad accelerates 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 devd)qc(;h,b ph pa )ccl:iapb 1ck *h6.celerate 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 wait 7gq28z9 ss jv6slnjn leqx/:(nunh;8tgw+ f/ ing at the intersection starts 6lnxv lgt;nj/s9egw:8hsn /qqn7z (f2us 8 j+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 surface o5cad6k))3q8g tmvjo t, qis7(jxbc n+;v,r sy f planet X wheq,8gsvv)d)b kjscn7c ;ttyoq +xr35m,a (i j6re the acceleration due to gravity is $1.5 \; m/s^2$. What is the maximum height reached by the object?

  An object is thrown upwash.r82zkgia877ace rrd with a speed of 12 m/s on the surface of planet X where the acc s7h2iz8k7a c re8gar.eleration 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(z7o -+;fe drogrnb a-hw/ 5ar 15 m/s on the surface of planet X where the accelera + 5h(r-nore go-/;fbdrza7wation 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 o. /ixyb(- xak9mkxqp u0h53z(hwwdm 2f planet X where the acceleration due to grav5h 9m( z w /x2whx(pkqux3yak0 -dm.biity 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 arja *;mphpt8 dy,(p (h ruler between your fingers and releases it without warning, how rm hhpj yd8; t,p(*pa(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 isod6-/v;zwmxf ; khwg* its velocity after 3.00 svwz -6m g d;ok*/hwxf;?

  A bullet shot straight up returns to its starting point in 19 s. What is the imh)( g:/ *vo kx9) 5iwqcpjgfp17ew lrnitial spee) cp/mjk( igl w5r hqo*9pxv: e)fg1w7d of the bullet?

  A ball is thrown straight up with a speed of 36.0 m/s 8,p7cp- e-jb lcu;pi0.kogg i. How long does it take toiipb8cop70,g gp-e. -l kjuc; return to its starting point?

  A ball is thrown downward from the top of a building with an initial speed of 2oz50h1vh iy;-ni t :4pb71vbnpa e3ut1 m/s. It strikes the 7b1h-0n 13tezvnp hvip;abiy t4o:5uground after 4.9 s. How high is the building?

  A ball is thrown straigb)ya;a, mu( (lzi0psnht up with a speed of 30 m/s. (only fill in numerical value in th( npis;m0 (alauby )z,e 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 speed of 32.8 m/s. (xrd*7q ce;d r8vnd0i: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 14 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 14.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what is the velocity at t)qm7n xvbp9j ) = 1.0 s?

  In Fig. below, what is ther54(z5y1)fsdrba+ 7hyazde d velocity at t = 2.5 s?

  In Fig. below, what is the velocity atfw o4ei l:6n)n t = 4.0 s?

  In Fig. below, what is the velocity at t =p,..1.)x qef gynuyso 5.5 s?

  In Fig. below, what is the average veloc(: sxkpxwv3 u76( jbvoity from 0 to 4.0 s?

  In Fig. below, what is the average zwqhdc v (;:q6velocity from 0 to 6.0 s?

  In Fig. below, what is the acceleratiok-k,amb,n:u 9wsxmc /4k e;zin at 1.0 s?

  In Fig. below, what is the acceleration atu;x q1)ex+5r hh: lgpy 3.0 s?

  In Fig. below, what is the averaa0j oeybd)b:;ge acceleration from 0 to 5.0 s?

  In Fig. below, what is the average accelerat k3 da5glv-j.gh r2sic ,0.qhjion from 0 to 8.0 s?

  In Fig. below, what is the displacement from 0 to 8.0 s)j /qg:xpel ;g?

Does a car speedometer measra 4ym6f 2qcq.ure speed, velocity? {speed|velocity}

  An object can have a varying speed if its velo txx7yv-7zej 3zk*s s50)re sqcity is constant.

  The velocity of an object can be n2u x f/-lcvy8w,f .4cdylca6w egative when its acceleration is positive.

  If one object has a gr h+ ki z0-w/,yjcgaa:s4g(x0 3df qzzbeater speed than a second object, the first must have a greater accelerati h:0z+z x ( dg-4ckq0yaa/jzi3,f wbsgon.

  Two cars emerge side by side from a tunnel. Car A is traveling withl/7adfdi5 q 6n 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 ar1l+,ht :nptd cceleration decreases.

  A baseball player hits a foul ball straight)t:5 -h3qckz;si)v ) f af3umw)oqzp o up into the air. It leaves the bat with a spe)z ihvk;3 :wu)m 5qc3f)qoao)ts pf-z ed 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 acceleration2v0ckbf m 2cc2, how doebcm22c c0k2v fs it change if air friction is ignored?

  As a freely falling object speeds))sl(bg y r(jp up, what is happening to its acceleration, how does it change if air frictpy)j (( rg)slbion CAN NOT be ignored?

  An object that is thrown vertically upward will return to its original posny /ht ubzhxds* 85()aition with the same speed as it had initially if air resistance is negligible. If air resistance is appr)(ht xun/asb hz*5y 8deciable, how will this result be altered?

  An object can have zero velocity and n/4k5o*t;j:mg bafe404kd5gxif 4k3upkq u mnonzero acceleration at the same time.

  An object can have nonzero velocity ani 28lco qybdr.o, /pbe-m*/pmd zero acceleration at the same time.

  An elevator moving from the second floor to thw01 * ).lmzzcwssk is(e fifth floor making no stops along the way has zewi.sm01( wzss )zl *kcro acceleration all the time.

  A rolling ball moves from amm o922td-rm1x1g qv $x_1=3.2 \mathrm{~cm}$ to $x_2=-6.0 \mathrm{~cm}$ during the time from $t_1=2.7 \mathrm{~s}$ to $t_2=5.1 \mathrm{~s}$. What is its average velocity?  (数值)  $cm/s$ (only fill in numerical value please)

  A particle at $t_1=-2.6 \mathrm{~s}$ is at $x_1=2.4 \mathrm{~cm}$ and at $t_2=4.3 \mathrm{~s}$ is at $x_2=7.4 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete laps around,tcm 4 bza:(p1h4vtif a quarter-mile ($1 \; mile = 1609 \; m$) track in a total time of 10.7 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 straig. 42 mlplec 5f:lmyn xs2g7ju2ht line, moving 115 m away in 10.0 s. It then turns abruptly and gallops halfway back in 4.6 s. Calculate (a) its average spjxu l25n:p s7g 2c4l lm.e2fmyeed  (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 fropm, l*xgd 3.pnm $13 \; m/s$ 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 jlp ;)h qemy*l q((/u)6yflpw$17 \; m/s$ to rest in a distance of 79 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reac7ren5i o scw-9h a speed of $28 \; m/s$ 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 can burst out of thesk 3n365zzh/0iv zzik blocks to essentially top speed aboutkkii hzn/v30z 36s 5zz $10.4 \; m/s$ in the first 11.0 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 unid,zjs78z1 xbfl3k k 1xformly from a speed of $16 \; m/s$ to rest in 5.17 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 thelgresc( ;1(g9z4 x kei highway. Assuming a deceleratigxz9(1s kri (;e 4lcgeon of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truckg;hvx6f ,j el1 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).    $m$

  A runner hopes to complete the 10,000-m run in less than 30.0 min. After jbdl1fpwsg q5h(z//;hnh/c 0 exactly 27.0 mi;hlgh0 ndz/ //fc5(h jq1swpbn, 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?    $s$