Suppose that an object travels from on6*c.ftq aoctcn0 t9s.e point in space to another. Make a comparison between the displacem* nac6.9csctt t.0q foent and the distance traveled.

  When is the average velocity of an object equal 6 :yje4.6,hgnfhey m pto the instantaneous velocity?

  A new car manufacturer advertises that their car can go "from zero tj9c t v5lvc s1v*hf6+zo sixty in 8 s+ hvlzv5cj*f 9s1vc6t". This is a description of

  An object moving in the +x axis experiences an acceleratig+ p43bps 3bk2d (k-8axspbfton of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to the East (+x direction) begin d ;g zk7c:wyyke .*ri.6bj-vd( 1tdlis to slow down as it approaches a traffic light. Make d ytrbe(d7* w-i.j klv :6kgi.zy1;dca statement concerning its acceleration.

  Suppose that a car traveling to the West (-:;.iy6+ fvogaje ( seox direction) begins to slow down as it appvo6+sofi e (g:ej; ay.roaches a traffic light. Make a statement concerning its acceleration.

  Suppose that an object ish )w1hu/4mcd)hp70dj w1lv pq( p4e oq moving with a constant velocity. Make a statement concerning jqhp1d(dhq)70wv /4 eo4cwum lp h )p1its acceleration.

  If the velocity of an object is zero, does it mean that the acceleration s;pz*,enon 4e is zero? Support your answer with an ex sp*e4n;z eon,ample.

  Can an object's velocj*r sj9xa1jrahl)*s +c6 s+jtity change direction when its acceleration is constant? Support your answer with an examplejtjhca+1+*sxrs *)69r ajjsl.

  Suppose that an objectasqqg+4xp u)- h ,no+k is moving with constant acceleration. Make a statement concerps+-g +4, q axk)houqnning its motion with respect to time.

  Can an object have incrzneyi m48 kw*fo1v-4reasing speed while its acceleration is decreasing? Support your answer withzkeyi r*4f-o1v48mw n an example.

  Suppose a can, after an initida,joby;d(05qbj6j rd ;rn 9eal kick, moves up along a smooth hill of ice. Make a statement concerning its acc,j0 o9;j6eb ab;d(dqrj 5nrydeleration.

  Under what condition is average velocity equal to the average of the ob dfel2 8t507l/fdj agqject's initial and final 5aet 7jql8ldg02f fd/velocity?

  Objects A and B both start at rest. They both accelerate at the same rater; c8mt:fnq76i6b9( tllgmhi8jn ( kn . However, object A accelet qf:( i8t9krbncgl lm;6nj (m6hni78rates 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. T9pe.tba bp3 -dhey both accelerate at the same rate. Howeved. e-39pa bpbtr, object A accelerates 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 and falls in the absence of frici3l jex ,e*b1ction, which oe lcj,3 1ie*xbf the following is true concerning its motion?

  When an object is releaseu 39tocp,ky *)kks*mid from rest and falls in the absence of friction, which of the following*m 3ys*k,ikpt u)k co9 is true concerning its motion?

  Suppose a ball is thrown straight up. Make a bjk8,u q7 *na clo(xk7 statement about the velocity and the acceleration when the ball reaches the ,(lnxk7*qjok 7 8bcua highest point.

  Suppose a ball is thrown straight up. What is its2s, b 8fb.uw;r,vhg-s8mt rgo acceleration just before it reaches its highest puh8,2sfgr,;bs m g-o r.8btwv oint?

  Suppose a ball is thrown straight up, reaches a maximumbz:pds/0c3 n-3 d 6 t v)vdoo+ykinh3o height, then falls to its initial height. Make a statement about the direction of the velocity and acceleration as the ball is going updopb+)0: 3ho i/n k ocd v6ys-n3zv3td.

  A ball is thrown strai kmkt enx.i:- vf-a*c4ght up, reaches a maximum height, then falls to its initial height. Make a statement about the 4-txk-i k*evnc amf.:direction of the velocity and acceleration as the ball is coming down.

  Suppose a ball is thrown downward in8v7chwwtypn)q7b p259zd nhw. e7u3osq2 w,b the absence of air resistance. Make a statemen soph. ,3wt 7dwqwb87bnz7v5 )qucp2hn 9ewy2 t concerning its acceleration.

  Suppose a skydiver jumpbeyh1 fqd s xw/g3ce dw1146,ks from a high-flying plane. What is her acceleration when she 1 1xhq3d 1byk6cfs4,d w/egewshe reaches terminal velocity?

  A ball is thrown vertically upward wit xkmrrq8 ;d :f)2s8,n wl)omrrh a speed v. An identical second ball is thrown 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 secondds)or mnr ,82rqxrw:;k 8l) fm ball go than the first ball?)

  Ball A is dropped from the top of a building. One second later, ball B is drm,i,h ; ot7ttlf .s/lhopped from the same building. As time progresses, the distance .l i/so7 fhl hmt;,,ttbetween them

  Ball A is dropped from the top of a building. One second later,vg+xj*ke*gz4n/ ds) a ball B is dropped from the same building. As time progresses, the difference in their speedsx*v*gek ngs zj+/4da)

  Two objects are thrown from the top of a tall building. One is thrown up7wy kw 3bck1,m, and the other is thrown down, both 7 ,m31c kkwbwywith the same initial speed. What are their speeds when they hit the street?

  A brick is dropped from the top of a building. A sbek g6l2i1c7y 9ukdx(mheh 3) econd brick is thrown straight down from the same building. They are released at the same time. Neglect air l)xe dgkh1bm236( c7ky9 u iehresistance. Compare the accelerations of the two bricks.

  An object is moving with constant non-zero veloci 62b,r-hcnlgkt n )u-gty in the +x axis. The position versus -)2u nk,b6gghrcn- lt time graph of this object is

  An object is moving with constant non-zero acceleration in t+g;wp9 fsevby5//a f rhe +x axis. The position versus timrbv9gfy/+5e ; fwspa/e graph of this object is

  An object is moving with constant notf+u6 jfd 5bu6n-zero velocity in the +x axis. The velocity versusu d5but f+6fj6 time graph of this object is

  An object is moving with constant non-zero acceleration in the +x axis. The velcw yi)6sn;q3zocity versus time graph of this objecyn is3)6qw zc;t is

  The slope of a position versus time graph g):*,utekq *wremcow:- m 3exsives

  The slope of a velocity versus time grap0 lbc k7kuiz).h gives

  The area under a curve in an acceleration verm)se4ooh13z jm1x 3mzsus time graph gives

  The area under a curve in a vb9hf o5 blid0iqcly;b94 -x v,elocity versus time graph gives

  If the position versus time graph of an objecxr xg- be-2-o gjv*k1ot is a horizontal line, the object ikj xgo- - v1rogbx-2e*s

  If the position versus time graph of an odg.upi)wq j. u.vl:h3 t:2v1, sijblkbject is a vertical line, the object is j.2.tikv.s ljw:1i qu ,ud phv:g)l3b

  If the velocity versus time graph of an k+7 6u+c btphijrmw )+5 yq;fvobject is a horizontal line, the object i +ujhyv+;rbqi6f )+tcm5w 7pks

  If the velocity versus time graphpn sv8h1x;c2l of an object is a straight line making an angle of 30 degrees with the time axis, the objnsh1p; x clv82ect is

  An object moves 15.0 m north and then 11.0 m south.lh po9 i 2 7gb21a.-xlqnubrn. Find both the distance traveled and the magnitux. nab 192bgn2iql.l7 ou-phrde of the displacement vector.

  A boat can move at 30 km/h in still water. How long will it take to mkd 4.pyg hh(0hz-f7qw ove 12 km upstream in a river flowing4fh7 yqh (pd0w.-h gkz 6.0 km/h?

  55 mi/h is how many m/s? (1 mi = 16gwi fyoxo8))q8l.u qh v3-q :i09 m)

  What must be your average speed in order to travel,nf/ +wm) xq0be-i5l nvzy8ru 350 km in 5.15 h?

  A runner ran the marathon (approximately 42.0 km) in 2 hours an 3g cel6fco/0ud 57 min. What is the average speed of the runner inuog 6f3l c/0ec m/s?

  A car travels 90 km/h. How long does it take for it to travj*cnb 8jui +wzvf +h60el 400 km?

  A ly (light year) is the distance tha;+xyaos i y mi )w9m0f9qo:jb4t light travels in one year. The speed of wim4m0q) joosa :ix;b yf+9y 9light 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 727 ynp arr4(yi: km/h along a straight road and you look to the side for 4.0 s, how far do you travel during this inattep: irnr4(7yayntive period?

  If you run a complete loop around an outdoor tra,rjarxx1q 34kck (400 m), in 100 s, your average velocity ia4kxxr ,j3q 1rs

  A polar bear starts at the North Polev+j, s/k*gs7 zax pj:j. It travels 1.0 km south, then 1.0 km east, then 1.0 km north, then 1.0 km west to return to its starting point. This trip taksgjk* :vp +j7,a jszx/es 45 min. What was the bear's average speed?

  A polar bear starts at the North Pole. It travels 1.0 km sout(w qi/a sj,vmmi6 .zi1h, then 1.0 km east, then 1.0 km north, then 1.0 km west to return to its starting po/si( z .qjm6v,wia m1iint. 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 m62o)2o 1fhg rln(vm7hbx ny60 miles. It then starts to snow and you slow to 35 mi/h. You arrive home after driving 4 hours and 15 minutes. x6omgh2fmyhlbrn7(n21v o)6 How far is your hometown from school?

  A motorist travels 160 km at 80 km/h and 160 km at 100w vwcejw/ aog6o y.9+3 km/h. What is the average speed o9c3ew/vjoo6a yg+ww .f the motorist for this trip?

  A motorist travels fod jkc 9bd-h+)8r mvft+r 3.0 h at 80 km/h and 2.0 h at 100 km/h. What is her average speed for the hjbtd9v8m -+)fd +rkctrip?

  An airplane travels at 300 mi/h south ekx+)-v,ehu( nhds0 :zdl2,. sl hx ,s6hqitvfor 2.00 h and then at 250 mi/h north for 750 miles. What is the average speed for thq2,ls .sh:-k,i vxuhhh)vn0 de(d ex6l+z t s,e trip?

  In a 400-m relay race the ancho*a.t ;/, sjflu /whrjqrman (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 10/r/ ;w,uhqast*f.jjl 0 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 a stop aft7di ,an*aq*cy (axv e-er 11 s. The car's average velocity during deceleration was 73 km/h. What was the car's decelerationxda* iy ea(n7vq,-ac* while slowing down?

  An airplane increases its speed fromjv xl2uiu) 2,m(jqc-9mu/p b p 100 m/s to 160 m/s, at the average rate of c (l9- ),qjpi/p2v mum jub2ux$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h accelerates at the rat j;3z :6opugcae 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 renw2b:tx pv )p9st and 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 1a6b+sd6v :9gpf0pso v0 s. It then speeds up with a constant acceleration of0s6b69 ago +sdv:vpfp $2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial velocity of 3.5 m/s experiences a constant acceleration :x h2-5+ktrk hkcw czv1y6,q lo,1c: vh2c5k k+6whrzq xtl-kyf $4.8 \; m/s^2$. What is the cart's displacement during the first 6.9 s of its motion?

  A bullet moving horizontally to the righ khfky )+axg-)pd q3-xt (+x direction) with a speed of 403 m/s strikes a sandbag and penetrates3+dg)-pq) x-hkyafxk a distance of 16.25 cm. What is the average acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is launched from a catapulu qbs*lu7/bw0an0j gf 5xaf43t 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 constns 4 aw*j5g03/0ufflb7qa ubx ant, what is the length of the catapult?

  A car starting from rest moves with constant acal)pp) b.pnvhv0wm .9celeration 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 mr 1g.pjn /s;qm5in/ (bhyu-km. What is its average aci5m(/ /npjynh rs bmu1-q k;g.celeration?

  An object starts from rest and undergoes uniform acceleration. During the f)sk6z bn 53ay-f3sdol irst second dzoyksfs-) 5a 3 6bn3lit travels 3.2 m. How far will it travel during the third second?

  An object is moving in a straight line with cons n*gwx )d3v 5:hnwbh(qtant acceleration. Initially it ishx3nvbq) g:5w(ndh* w traveling at 16 m/s. Three seconds later it is traveling at 10 m/s. How far does it move during this time?

  A car starts from rest and accelerates uniformk2yaz hfw:f03r oldwhla,.h.mx56r 6ly 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 deceleraa 8bb),)dro j5as jqka*9) fxwte 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 ckqd 7(,7yywlppd9, j ear that has been waiting at the int ( ypljd9,qw7,kpey7 dersection starts 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 surfac+ dsaf, e,d(hme of planet X where the acceleration due to gravity isea+( ,,m ddshf $1.5 \; m/s^2$. What is the maximum height reached by the object?

  An object is thrown upward with a speed of 12 m/s on the surface of p3 hgkxf;4b2gllanet X where the ackh3 bxgf ;4lg2celeration 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 m/s on theko+t-3uhlvq 23k(a mv surface of planet X where the acceleration due to grav auvmtv+hkoq2(l-33 k ity 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 u8.5yxb2g mr 5o(eadyppward with a speed of 14 m/s on the surface of planet X where the accelerao 8p2yby g(a5 medx5r.tion due to gravity is $3.5 \; m/s^2$. What is the speed of the object after 8.0 s?

  Human reaction time is ui0zaq0)propbzksq4 ( h3 e.2w sually greater than 0.10 s. If your friend holds a ruler between your fingers and releases it without warning, how far can you expectaez qir.wp2qhbpsz0)o k(40 3 the ruler to fall before you catch it?

  A ball is thrown upward at a velocity of 19.6 m/s. What is ik2 le5yh/sn1c ts velocity after 3.52e1/clknh ys00 s?

  A bullet shot straighgh2mh4w-zmn 8-jmyp: 7hzr8no; 4dgx* w5xcjt up returns to its starting point in 19 s. What is the initial speed of th: m4h;hz-j28*nj7rwwo- 8d gzxx4 hgmynpm 5ce bullet?

  A ball is thrown straight up with a speed of 36.0 m/s. How bwk8p0xvcjs ki;pb 5*em 9u ;2long does it take to return to its starting point?90semj5pc8v;ub ;kk2 *iw xp b

  A ball is thrown downward f7qj7 ho; sufc(rom the top of a building with an initial speed of 23 m/s. It strikes the ground after 7.9 s. How high is t (o7q hcjus;7fhe building?

  A ball is thrown straight up with a speed of 30 m/s. (only fill in numerical valzmaoc/(x:m 0 hue in tmxz0 a/m(h:cohe 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 30.2 m f 4y+yg55scnk/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 12 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 12.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what is the velocig;;.f8 vtm+wczwpo.wty at t = 1.0 s?

  In Fig. below, what is the velocity at t = 2 5b93+x argqto.5 s?

  In Fig. below, what is the 4i.: i2p k9fmlyh)wuivelocity at t = 4.0 s?

  In Fig. below, what is the veloci yvj3g)km vli4- xa ozz,h,*ug*f*t(a gg5p2 bty at t = 5.5 s?

  In Fig. below, what is the06 ju6x hli-ii average velocity from 0 to 4.0 s?

  In Fig. below, what is the average velu a4z 2ki+0 pwiuabo;q qw-+0cocity from 0 to 6.0 s?

  In Fig. below, what is the acceleration at 1.0*kk7 k k4ef 7ffss0pcp0, -js7hmd4ln s?

  In Fig. below, what is the acceleration at x3vi d (kx f65wfd63sg3.0 s?

  In Fig. below, what is the average acce, q2 .qci4+n eryirk3jleration from 0 to 5.0 s?

  In Fig. below, what is the average acceleration from 0 to 86 ez v7j.*jopq.0 s?

  In Fig. below, what is the dis r84d beco(+tlplacement from 0 to 8.0 s?

Does a car speedometer measure speed, velocitvf lnb487+sucy? {speed|velocity}

  An object can have a varying speed if its veloc8vvk9r/m h/p oiwg+j ro::fk+ ity is constant.

  The velocity of an object cavwzz67sn wm2nm76i 3 4w xi6vsn be negative when its acceleration is positive.

  If one object has a greater speed than a soo4unbz)y ;1ka +dx a)econd object, the first must have a grey)aad k1u4);nbx z+o oater acceleration.

  Two cars emerge side by side l2u .5j:wn0rbgwg ;m nfrom a 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 n5;b n:3t fhgyspeed as its acceleration decreases.

  A baseball player hits a foul bamz 22j1841s cy f-wmrz/oyudhll straight up into the air. It leaves the bat with a speed csy yf/zz1urmmj8 -ho14 d2w2 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 acceleraghg;n +nn3x.h tion, how does it change if aigg. 3 nh;xn+nhr friction is ignored?

  As a freely falling object speeds up, what is happening to its a zqjv:lw*nr8l e4q14 pcceleration, hownler4p8q*zlq 4w1 :jv does it change if air friction CAN NOT be ignored?

  An object that is thrown vertically upward will return to its original pos dbxdtbl :8,9nition with the same speed as it had initially if air resistance is negligible. If air resistance is apprex:,l8d9ntdb bciable, how will this result be altered?

  An object can have zero velocity and nonzero acceleration at the same 5*kac l0 (eao(ue*nj ntime.

  An object can have nonzero jez2sp r2 .k0evelocity and zero acceleration at the same time.

  An elevator moving from the second floorudy;d/xdd z3. to the fifth floor making no stops along the way has zero acceleration d xd3u/ddy.;z all the time.

  A rolling ball moves from2/6ogo bkigp 30dfq9e $x_1=2.6 \mathrm{~cm}$ to $x_2=-5.3 \mathrm{~cm}$ during the time from $t_1=1.8 \mathrm{~s}$ 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 $t_1=-4.2 \mathrm{~s}$ is at $x_1=3.4 \mathrm{~cm}$ and at $t_2=4.4 \mathrm{~s}$ is at $x_2=8.2 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight comple1 ;.lne1z3 hvli htvf,te 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 a straight line, moving 104 .;q;ix y n r:v0/yvmjot17nzq m away in 9.5 s. It then turns abruptlyvjvirt 0o;q.nxmq z71y;:n/y and gallops halfway back in 4.5 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;vqnm ptwl,7 w;2/ z 4gxnv4lh $13 \; m/s$ to $25 \; m/s$ in 4.6 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 -wm;hd::tvvl;et p5 v $18 \; m/s$ to rest in a distance of 67 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reyi/jf/bp7 )d sach a speed of $33 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $2.5 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinter can burst out of the blm 3c4xnq3 * 38ptjatzlocks to essentially top speed about*ltxaqtnp3 mj c3z438 $10.8 \; m/s$ in the first 14.9 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 uniformly 5su5mkt o ;h+cfrom a speed of $20 \; m/s$ to rest in 5.77 s. How far did it travel in that time?  (数值)  $m$

  In coming to a stop, a car leaves skoz(wk.m(( t7vw1v +yvapred+id marks 92 m long on the highway. Assuming a decelerationzw.vktw 17ov( ( aed(+r v+mpy of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a trucjehauos+ n0t (j/z3 fuctl 9*t dgc,.)k 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 thandwewkglleu22 ; v,c5. 30.0 min. After exactly 27.0 min, there are stiec2uw.wgd 2vke5,;l l ll 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?    $s$