Suppose that an object travels from onembs3wc*ej 99 r point in space to another. Make a comparison between the displacemen9wbc* m3s er9jt and the distance traveled.

  When is the average velocity of an u0.wim np+v,u/ c0jzwobject equal to the instantaneous velocity?

  A new car manufacturer advertises that their car can goydxw3cfyt f i9q-/(jf ua9piru9 )o 2- "from zero to sixty in 8 s". This is a description rtocf uu299y 9pxj 3fwq(ayii/ f--d)of

  An object moving in the +x axis experiences an accelerat:5zum1 2mi4dc 82jh +udybn0 gwvxca* ion of $2.0 \; m/s^2$. This means the object is

  Suppose that a car tra/cbp.ofm-k5 m 0as3iaveling to the East (+x direction) begins to slow down as it approach- so3mm5pfcak0 .bi/a es a traffic light. Make a statement concerning its acceleration.

  Suppose that a car travelin3mc*h0d t6db-v fy,1y h x,fcvg to the West (-x direction) begins to slow down as it approaches a traffty-hxcmcf1 bh,d6* ,03yvd fvic light. Make a statement concerning its acceleration.

  Suppose that an obje8uar 4 ugs.-gact is moving with a constant velocity. Make a statement concerning its accelersugagur84-a. ation.

  If the velocity of an object is zero, - y0.m b xr65m7 alwsz:4nds sa2u2crpdoes it mean that the acceleration is zero? rwc sul4dr0nys 2s: bmm5z2pa-x6 a.7 Support your answer with an example.

  Can an object's velocin; rm/ih q50kgty change direction when its acceleration is constant? Support youhmgri/ 50kn;q r answer with an example.

  Suppose that an object is moving with constant acceleration. Make a stateme9 (zjio (zs7qwnt concer owsqj (7z(i9zning its motion with respect to time.

  Can an object have increasing speed while its acceleration is decre6ew4*2muunfr a :/inzasing? Support 4au: 6rfmn*nui /2ewz your answer with an example.

  Suppose a can, after an +lwon y+dpaem *o exib;40g )0initial kick, moves up along a smooth hill of ice. Make a stanw+om0b*l i0ye+ )oapg4ed;x tement concerning its acceleration.

  Under what condition is average velocity equal to the average of the a a4n6 w5mys:sobject's initial and final velocity?a:5an6sy swm 4

  Objects A and B both start at rest. They both accelerate at the epw**8zpzb ijb h6zv1 o9 ki41same rate. However, object A acceler*p91z4w 1 *pkie6bz8hjvoizb ates 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 ij fxgn;1kun.mma0 -5rest. They both accelerate at 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 of ob k; 5 g0ufjnmx-nam1i.ject B?

  When an object is released from rest and falls in the absence of frictioiw (2/:hz q scwpfb y4v1fo,w5n, which of the following is:1 s 5z,pwcbh wy2v4wqifo(/f true concerning its motion?

  When an object is released from rest and falls in the absence of friction, whichu2)pt2cd q9oc 9oq2c tcudp) 2 of the following is true concerning its motion?

  Suppose a ball is thrown straight up. Make a statement about the velocity t-xks ;.tzl:r and the acceleration when the ball reaches the hig k;ttx:lszr-.hest point.

  Suppose a ball is thrown straight up. What is its acceleration juydit ahg6n9 dj a72r34st before it reaches its hia62g ad7dyrn t49hij3 ghest point?

  Suppose a ball is thrown straight up, reaches rdb k)k aj* 9 ;c/y85afyjfnc(a maximum height, then falls to its init*9b ncj (y; fr5dk/cjk) 8fyaaial height. Make a statement about the direction 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 initi5vsyv07pi x:0aqus ) y0clte/al height. Make a statement about the direction of the velocity and acceleration as qi0 v:y 5v0ts7 sp/ucy)ael0xthe ball is coming down.

  Suppose a ball is thrown downward in the absence of air 0q p5gq+fp*: ern,wd/- el /wl-a rpqcresistance. Make a statement concerning it wefwar,qpd-+5:q pp /nqel rg*0l-c/s acceleration.

  Suppose a skydiver jumps from a high-flying plane. What is her accelermwv; un0j9mx w+)h4q*:m ukyzation when she she reaches terminal ve9wvymu z0;4 u+qknjh ) xmw:*mlocity?

  A ball is thrown vertically upward with a speed v pa.3 2wem8*; cu yktsjtcq91h. 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 highek9;yej8ahc uqwcp . 2*st3tm1r does the second ball go than the first ball?)

  Ball A is dropped from the top of a buildingv lo:u- zg1*a,li,zat t q8v*j. One second later, ball B is dropped from the same building. As time progresses, the distance :i*zt, 8vjalo1- tg,q luv*zabetween them

  Ball A is dropped from the top of a building. One sjp ec3;a+97xccfw k0yecond later, ball B is dropped from the s73+ykafpexc0j ccw 9;ame building. As time progresses, the difference in their speeds

  Two objects are thrown from the top of a tall bu :fl /0q3ewa76xljbpp7xy5oailding. One is thrown up, and the other is thrown down, both with the same initiax :foly6xp q/p wb3e l07j5aa7l speed. What are their speeds when they hit the street?

  A brick is dropped from the top ofybajrc/ci328*c jcyxq0 6mcw75thl 6 a building. A second brick is thrown straight down from 3a56bc j ccri6c0yjm /qcw8xtly2*h 7the 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 in the +x axis. The posia o4r/dupgq- )tion verg4u/ )qpao- rdsus time graph of this object is

  An object is moving with constant non-ze v:6gsb 4f hthqv*fr7/vs7vo-ro acceleration in the +x axis. The position versus time graph ofvso7rq7 :f*g6hv ft bhv/vs- 4 this object is

  An object is moving with constant non-zero velocity in the +x axis. The velocitu19f h jhk9y b9he0d;ly versus timkb j9uy9e0hh dh; 9f1le graph of this object is

  An object is moving with constant non-zero acceleration in the +x axi dm i; sz6ffh;ks2t+5ns. The velocity versuk+f; smfd6it2;shzn 5s time graph of this object is

  The slope of a position p daw81u6,id h1buaffabl :p a2;;py- versus time graph gives

  The slope of a velocity ve1m cxyamb;1n)6 e -qp*t.wsa*rap o,jpn v .6yrsus time graph gives

  The area under a curve in an acceleraxrp 3 3ck,lmc.tion versus time graph gives

  The area under a curve in a velocity versuudgyk + 8)o9iis time graph gives

  If the position versus time graph of anmhro.1w(usvm+ 1c xr 9 object is a horizontal line, the object hwsxm c( v9ur1o+1r. mis

  If the position versc4+ ,x+mf vyjkus time graph of an object is a vertical line, the object is, +f4myvkcj +x

  If the velocity versus time graph of an object hzf8nrzjre .q6-h 65pis a horizontal line, the object is.p q 6hrrzj6e-5z8h nf

  If the velocity versus time graph of an object is a straight line mdd:qp m0pf,448ymacw aking an angle of 30 degrees witd40qmd: 4,a8fpwmpc y h the time axis, the object is

  An object moves 15.0 m north and then 11.0 m south. Find both the distance tra)7ph :y ul5rx6 rnv.dfu.5mge .oo(dmveled and the magnitodl5dm xgourr (.67:yupv.fh5e)n m .ude of the displacement vector.

  A boat can move at 30 km/h in still water. tmn7 yz 9(48bmp:zg0jedk3th How long will it take to move 12 km upstreaj 8e9kzm3bdtpmny 04 zg :(ht7m in a river flowing 6.0 km/h?

  55 mi/h is how many m/s? (1 mi = 1s gfndln*yj/m,lr: gxigsnd5023 : c 0609 m)

  What must be your average speed in order t13 lhfps2cd (eo travel 350 km in 5.15 h?

  A runner ran the marathon (approximately 42.0 km) in 2 hours and 57 min. Wg.n*vt 46mbmnhat is the average speed of *. mn 4ngvbmt6the runner in m/s?

  A car travels 90 km/h. How long does it ta h3p2hj e:lzs0ke for it to travel 400 km?

  A ly (light year) is the distance that light travels in one yeauzwcm -9x10uf 0ztn9 8f+thxdr. The speed of light is nx9uwt90f hm01cu8xd- + ftz z$3.00 \times 10^8 \; m/s$. 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 /s4orc2ru(yc0r f2yn yyxk xe9v6 p94to the side for 4.0 s, how far do you travel during thvpfr9 6u 0yy94x(krc co n2x2/re ys4yis inattentive period?

  If you run a complete loop around an outdoor track (400 m), in 100kfiq xl*m,kpz/h,95 o5 3tyak s, your average velockqmy5*akf ,o ,ip k/l t35hz9xity is

  A polar bear starts at the North Pole. It travels 1.0 km south, then 1.0 km e3yq kxci3d a92ascxiy3dq9 ka23 t, then 1.0 km north, then 1.0 km west 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 1.0 km south, theny-v9cc 1h 7crvuw; /zn 1.0 km east, then 1.0c;u wyhcz 9n/rc17-vv km 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 onzhb8w5wm5)tsv0/o82y 4,euvyzytig a weekend from school at 55 mi/h for 110 miles. It then starts to snow anoh/5bs0w58) 2 8zt4muewyiztygvv,y d 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 and 160 km at 100 km/h. What is the averag3o 021wycs-chd an6q; ,z(euc*s w sfge speed of the motorist fosnwha3 s,c1gyuqz6(d*w0oc f ;2 ce-sr this trip?

  A motorist travels for 3.0 h at 80 km/h and 2.0 h at83web2ho4val7 m. kd)mo lm 0j 100 km/h. What is her average speed o 7h.38b ma m0l2mwlv)4oekjd for the trip?

  An airplane travels at 300 mi/h south for 2.00 h and then at 250 mi/w.msz4rz4fwgq mg m agn:4,*) h north for 750 miles. What4wa) m*zf s mgnwq4gmr.:,g4z is the average speed for the trip?

  In a 400-m relay race the anchorman (p40ok fs 2,vtzthe 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 2p,fszkt0v o410.1 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 after 9 s. The c;zo 5q,dq mh4zar's average velocity during deceleration was 43 km/h. What was the carm ,z5qhzd4o ;q's deceleration while slowing down?

  An airplane increases its speed from 100 m/s to 160 m/s, at the average rate o8*xzq-qp w8 egf qzxq8-w gep8* $15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h accelerates at the rate of do fboombj0.s*(*zn *$2.0 \; m/s^2$. How much time is required for the car to reach a speed of 90 km/h?

  A cart starts from rest and acc6,wwfbusv0 1 belerates 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:7/rsx -yafdz a constant acceleration/- d:azyx r7fs of $2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial velocity of auhgk )a)(sq13.4 m/s experiences a constant acceleration o(h1)qkags)au f $2.1 \; m/s^2$. What is the cart's displacement during the first 6.1 s of its motion?

  A bullet moving horizontally to the right (+x di1z u2s6sv1 afp(s6uxkrection) with a speed of 492 m/s strikes a sandbag and penetrates a distance of 27.78 cm. What is(6uau6 12pkv 1 ssfzxs the average acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is launched from a catapult on an aircraft carri eta56mj z.m7khpsg -.,t+o bper. It reaches a speed of 42 m/s at the end of t7pp t,sgmz.mt6e- 5ak+ jbo h.he catapult, and this requires 2.0 s. Assuming the acceleration is constant, what is the length of the catapult?

  A car starting from rest move.llhd/ul iu 6-s 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/s in a dixt:o9 /hofz nl.ic*; ek6u3ngstance of 200 m. What is its average acceleratiox/n6ooeti fg nl9 3:hkz.;*uc n?

  An object starts from rest and undergo)q.quz 7rtea:bl 6i5 l -i(s 7lrusdq8cr5rl7es uniform acceleration. During the first second it travels zdu 7 eui 5.rl7c5(qb:s-lr7a lt8l ) 6qsqrir6.6 m. How far will it travel during the third second?

  An object is moving in a straight linetzb /3 4m.wokd with constant acceleration. Initially it is traveling at 16 m/s. Three seconds later it is traveling at 10 m/s. How far b zm3tk/wd.4odoes it move during this time?

  A car starts from rest and acceleratef3ok;m x0 n(q)twzmn)s 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 ro1 (c9jeg ,u2h61 qeb fcul6zmoad 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 waiting at b:cc3s0 1et p8cx y;sk2vp+eythe intersection starts ahead with a constant accelerat1ec+yb38yst ;xp cvk:e2p 0 csion 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 o t8*auu:o 6 dk( cmar*hh;jja8n the surface of planet X wherejj6kc ha( rao8h*;aum td8u*: the acceleration 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 12 m/s on the surface of plakohq ) u i09aq.5n6:v;bdglcvnet X where the acceleration due to gravity 5cqda0vi vq ohuk9n6b.g:);lis $1.5 \; m/s^2$. 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 nwi ll0w7 gz 7v8j89ods7,k ksplanet X where the acceleration7so8 wk kd7i0l7,8 vnzj w9sgl 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 of planet ykqgj:/kd+ t1X where the acceleration due to gravity/ :t1dq+kgkjy 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. )jq r.r1b2- j(nxkin 2pkp7ygIf your friend holds a ruler between your fingers and releases it without warning, how f.kj pgk2xi r7j2-b1n r(y)qp nar can you expect the ruler to fall before you catch it?

  A ball is thrown upward at a g)gzxp l-kr9 9 ejix70velocity of 19.6 m/s. What is its velocity after 3.0 )x97r-lxzigjeg p0k90 s?

  A bullet shot straight up returns to its st/unmjba7( *y varting point in 11 s. What is the initial speed o( */y bauj7mvnf the bullet?

  A ball is thrown straight up with a speed of 36.0 m/s. How long g/oc2*o;whvi does it take to return to its starting po hw2 /c*voogi;int?

  A ball is thrown downward from the top of a building with an initial speed of 14 z**m hvoji32n m/3z o 2jm*vi*nhs. It strikes the ground after 2.1 s. How high is the building?

  A ball is thrown straight up with a speed of 30 m/suz3+a+y be y3d. (only fill in numerical value in the bl3 y3du+y+a bezanks)
(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 intoxt m ej28 u52xez(yq;g the air with a speed of 48.1 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 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 the2 .0zy) .3xaseyg nkui velocity at t = 1.0 s?

  In Fig. below, what is the velocitymz2w2px9) h1l1vb qko at t = 2.5 s?

  In Fig. below, what is +o: svc3o 7imtwimy 4,the velocity at t = 4.0 s?

  In Fig. below, what is the velocity at t = 5.5 s?dq1 cx ib1.18jcxn) r 6onjri2

  In Fig. below, what is the average velocirj,lspxq1+ c iy7 +1itty from 0 to 4.0 s?

  In Fig. below, what is k3dmtj2ech*qim1(762+s szhuh4wtf the average velocity from 0 to 6.0 s?

  In Fig. below, what is the) 9i fuzs2ou;j,vz0 qp acceleration at 1.0 s?

  In Fig. below, what is the accelutd:1eb atziobxz-+)os3 ds*7lnoan5bf 58 *eration at 3.0 s?

  In Fig. below, what dh3y9;.k; acxk:c7dpdfxb) k is the average acceleration from 0 to 5.0 s?

  In Fig. below, what is the averagk.(-(bvbx v nse acceleration from 0 to 8.0 s?

  In Fig. below, what is the displacement frowufe3zo 9-6uz m 0 to 8.0 s?

Does a car speedometer measure speed, velocity?*z3mnu-vn, t e {speed|velocity}

  An object can have a varying speed if(fe f5m(pfb j5 its velocity is constant.

  The velocity of an object can be negative when its acceleration is posqmkn,mnhnat a;5q2 k. y i+wcz u-j:3-itive.

  If one object has a greater speed than a second odl 27z7.v gxoybject, the first must have a greater acceleray7g 7xz.ld ov2tion.

  Two cars emerge side by sivqmsdp. 305d: oyitxl:6y4 byde from 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 i 2rv9rp4vf 9zczks mky n)k(i , kee/vj+9-bp3n speed as its acceleration decreases.

  A baseball player hits a fou9hcon ed*f*63p, bsmel ball straight up into the air. It leaves the bat with ofc* sdp9 ,he*6mbne3a 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 speeds up,j9jp+1cqd0.e7 wr tdz what is happening to its acceleration, how does it change if air .wj1d07c r9z ejqt +dpfriction is ignored?

  As a freely falling object speeds up, what is happeningfs 7bf* d+pb2k to its acceleration, how does it change ifd7+*b kb s2pff air friction CAN NOT be ignored?

  An object that is thrown vertically upward wih 4uhv thrrp +5*jt6f)ll return to its original position with the same speed as it had initially if air resistance is negligible. If air resistance is appreciable, how will this result be alterepj t4)rr6uhhv h*f+5t d?

  An object can have zero velocity and nonzero acceleration at the;d/ r 5sbm1zjv same time.

  An object can have nonzero velomcwiqd.9 h. 5kcity and zero acceleration at the same time.

  An elevator moving from the second floor to the fifth floor m .frij-d) y1qjaking no stops along the wjf. y -q)jd1riay has zero acceleration all the time.

  A rolling ball moves fp kif/rf2f2k- rom $x_1=3.0 \mathrm{~cm}$ to $x_2=-7.5 \mathrm{~cm}$ during the time from $t_1=2.7 \mathrm{~s}$ to $t_2=5.6 \mathrm{~s}$. What is its average velocity?  (数值)  $cm/s$ (only fill in numerical value please)

  A particle at $t_1=-3.2 \mathrm{~s}$ is at $x_1=2.4 \mathrm{~cm}$ and at $t_2=3.4 \mathrm{~s}$ is at $x_2=8.0 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete laps tj 0*mrl8rb t6around a quarter-mile ($1 \; mile = 1609 \; m$) track in a total time of 6.9 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 straighted0pwt qj bb(.3u.h9kwbm *, x line, moving 105 m away in 12.2 s. It then turns abruptly and gallops halfway wd m.k*b9wu0qhx.b ,ep(tb3 j back in 4.6 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 vfee4 o/j z,o/$10 \; m/s$ to $22 \; m/s$ in 6.0 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 fro7 gce g.9m 6;:luz ip6f,zsvetm $22 \; m/s$ to rest in a distance of 67 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must r 9 :ha7yqhj49,r3+c/l i0 kdf msme jky3joua(each a speed of $31 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $2.2 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinter can burst out of the blo( z1v:bw3 twpxtb;o0qcks to essentially top speed about w vb w31tqo; bpzx0(t:$10.6 \; m/s$ in the first 11.7 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 unifo. qz l7e bjx619em3jzfnf36dlrmly from a speed of $21 \; m/s$ to rest in 4.69 s. How far did it travel in that time?  (数值)  $m$

  In coming to a stop, a car leaves j v07ytkmh-v8skid marks 92 m long on the highway. Assuming a decelevkmth7v y- j80ration of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck goiny pw12ai amx8)g $25 \; m/s$ 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 10,0tn 8c/y7k8sdonw .5 ca00-m run in less than 30.0 min. After exactly 27.0 min, there are still 1100 m to asdcy c8/8nn57.tk wogo. The runner must then accelerate at $0.20 \; m/s^2$ for how many seconds in order to achieve the desired time?    $s$