Suppose that an object travels frome6 s9kfkv)9 nk one point in space to another. Make a comparison between the displacement and the distank6f)ks ve9nk9 ce traveled.

  When is the average velocity of an object equal to t3 ez jnh vnsf23hx(l:/he instantaneous velocity?

  A new car manufactur)i342dj pbc ( gkvybw:er advertises that their car can go "from zero to sixty in 8 s". This is a descriptw3dy pbk4c2vg ibj(: )ion of

  An object moving in the +x axis experiences an accelerat8a u4 wpk:u;i u:c;swcl9 c8lrion of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to the East (+x direction) begins to slow downjl 1vh/; inz6 ejp2dg1 as it app;6 g1hd2 lz1npjv/j ieroaches a traffic light. Make a statement concerning its acceleration.

  Suppose that a car traveling to the West (-x directhy(q:mzn7z e .ion) begins to slow down as it approaches zh (emy :nq7z.a traffic light. Make a statement concerning its acceleration.

  Suppose that an object is moving walu7p.k8ky g is7(9 itith a constant velocity. Make a statement concerning its ac8 ylg kapk .9situ77i(celeration.

  If the velocity of an object is zero, does it mean9-5j ntwpt/ol that the acceleration is zero? Support your answer with an examp59tn t-wpoj /lle.

  Can an object's velocity change directi :e+)q * vh4mrbsqhc7don when its acceleration is constant? Support your answer with an exam7:sdb m * v)hqc+he4qrple.

  Suppose that an object is moving with constant accelerat8 mwjlnvr-e +pdxm2g 9h4c *-gion. Make a statement concerning its motion with respect to time.pmc*nv2 +j-lmxgg-rew dh4 98

  Can an object have increasing speed while its acceleration is decreasi l1o6bm afelhib)91z6ng? Suppoo6fbb 6azil e1)h91mlrt your answer with an example.

  Suppose a can, after an i; (v xq3cjci2 lbjx87initial kick, moves up along a smooth hill of ice. Make ;3cx(l c7bqjji8vxi 2a statement concerning its acceleration.

  Under what condition is average velocity equal to the average of the d dcevpp ):9,gobject's initial and fincpv9: d,dp)eg al velocity?

  Objects A and B both start at rest. They both accelerate at n lahvjho(4 jg4,(+acthe 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 o(gl ha4a4ho(n+ jv,j cbject B?

  Objects A and B both start- :zmnxkqw9veg8foo. g2*f-u from rest. 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 o x9f8*oz -wvfuoq2-.gk :emgn bject B?

  When an object is relz 33svckygoh. u((er9 eased from rest and falls in the absence of friction, which of the following is true concerning is 9 3uco z.hvk3g(yr(ets motion?

  When an object is released from rest and fa9x4w; *v;ccl rfrdsz*lls in the absence of friction, which of the folloczxs*; ;*9wdr lcf4r vwing is true concerning its motion?

  Suppose a ball is thrown straight up. Makbe0vz, 6q/c5w-vc este a statement about the velocity and the acceleration w 0v/qs ,ee-z vw5ct6bchen the ball reaches the highest point.

  Suppose a ball is thrown straight up. What is its acceleration jus+ma 1l(+r3wb2d h) t gq(pfogst before it reaches its hi)gsfr pw l+hb doqag31+mt2( (ghest point?

  Suppose a ball is thrown straight up, reaches a maximum height, then falls to i :nkc,s0 f,9+ hubd*yp td6zhkts initial height. Make a statement about the direction of thychpd* tn, zk:d9bfk0,+ u 6hse velocity and acceleration as the ball is going up.

  A ball is thrown straight up, reaches a maximum height, then falls to its iniu3sn2 /k f8evkib-a+stial height. Make a statement about the direction of the velocity and acceleration as the baku+fba 82e v-s3/ksinll is coming down.

  Suppose a ball is thrown downward in the absence of air r9,++lgcr m ;x-rdwovtc;9su v esistance. Make a statement concermtvvcx-w ;r++ou r9s;c9 ,gldning its acceleration.

  Suppose a skydiver jumps from a high-flying plane. What is her acceleratm jindqg)c4w46 uxay9( 7l.5e zw6qlgqx6ba +ion when she she reacxa5+4 .llz67ejcumnw 96y)(w bg64 qaqgxdqihes terminal velocity?

  A ball is thrown vertically upward with a speed v. An identictbph psgr6,1 -al 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 second ball go than th1gbh t6-sp, pre first ball?)

  Ball A is dropped from the top of a building. One second later, ball Bu52 rjnj z(ola)enzd052y:6 ru ncqx7 is dropped from the same building. As time progresses, the distance beyo5 q u72:nj 5unn2j ) rrz6zcla0(dxetween them

  Ball A is dropped from the top of a buildi;9fw/ lfxz9v bng. One second later, ball B is dropped from thef;fzvwx/9 9 lb same building. As time progresses, the difference in their speeds

  Two objects are thrown from the top of m7 lee a;wo y6igk)b,5a tall building. One is thrown up, and the other is thrown down, b o;kgmie67 w,yeb )al5oth with the same initial speed. What are their speeds when they hit the street?

  A brick is dropped from the top of a building. A second bricle0t mi0 2)bidk is thrown straight down from the same building. They are released at the sami0 bm)i0d2tle e 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 llsfe+de m4) b -x+so3position versus time graph of this objdol les+xsef3 -+mb4)ect is

  An object is moving with constant non-zero a **2.hc: zfnxmlzi dr* ;,gsspcceleration in the +x axis. The position versus time graph of thipfhzxm: g , r.z;csin *d*s2*ls object is

  An object is moving with constant non-zero velocity in the +x axis.f98b b oht7x3d o08jyg The velocity versus time graph of this obg87xb09y8fd jh oot3bject is

  An object is moving wi nkgso*z; 7(hyth constant non-zero acceleration in the +x axis. The velocity versus time hk;7(s gn* oyzgraph of this object is

  The slope of a position versus ti/ pr;ytr k e6lq8p;gi:me graph gives

  The slope of a velocity versus time grapn ob7y vdy/b8;jaoox t9yx:88 h gives

  The area under a curve in an acceleration vdte )p..7idgy un d00l8pmn:v ersus time graph gives

  The area under a curve in a velocity versus time graph g);66aoc/gup n-cjqqh ives

  If the position versus time graph of an object is a horizontal lir (+9x u3ylect 2dpot)ne, the object t9)xd2pu+ clyte 3or( is

  If the position versus time graph of an object is a vertick 4s5 iufj9mkxtjfb** 939xpp al line, the object istk* usi9jf5 f m*pxx 4bpj39k9

  If the velocity versus time graph of n/p 8 x0ir90sweup2pq an object is a horizontal line, the object iup09 i0 pp8w2xrqe ns/s

  If the velocity versus tim)tvg gs1yv* fukt *i/4e graph of an object is a straight line making an angle ofv4*ifs ut)g1 /k*ty gv 30 degrees with the time axis, the object is

  An object moves 15.0 mk vx-4z(ul9y7oy h d1e4hwm*q north and then 11.0 m south. Find both the distance traveled andyd*47yk9olwhq4h1 m-zxu ve( the magnitude of the displacement vector.

  A boat can move at 30 km/h in still water. How long will it take to mgyfw.c3 (qc/t ove 12 km upstrea/3cw gc(yq. tfm in a river flowing 6.0 km/h?

  55 mi/h is how many mkly5- 0 nff;i*f* vhqm/s? (1 mi = 1609 m)

  What must be your average speed in order to travel 350 km in 5 f* zke14wrx6m.15 h?

  A runner ran the marathon (approximately 42.0 km) in 2 hour2 +5zs8w sp mrkn+t9vos and 57 min. What is the average speed of the runnerpr+8w2s+ tn osvkz9 5m in m/s?

  A car travels 90 km/h. How long does it take for it to travelaq7rtqq1nh c*6 r+ e)x 400 km?

  A ly (light year) is z;yz 7nwmq)e +the distance that light travels in one year. The speed of light my7z qw)n+e; zis $3.00 \times 10^8 \; m/s$. How many miles are there in a light year? (1 mi = 1609 m, 1 yr = 365 d.)

  If you are driving 72 km/h alon6vtewn -1u.fuuv,9l qm hv:n9 g a straight road and you look to the side for 4.0 s, how far do you travel during this inattentive1,t6u nwq. ufl99uev: hv-m nv period?

  If you run a complete loop around an outdoor track (400 m), in 100 s, vltt* +2z 1pxf(8 bnwvdp -.btyour average zd pbt+vb*-pf t1nt.lw 2x(8v velocity is

  A polar bear starts at the North Pole. It travels 1.0ilm /.4kjy08uj )bj:rq4a in w 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 takes 45 min. What was the bear's average speed?/b) iw r:48qi j. j0ya4unklmj

  A polar bear starts at the North Pole. w*j185gavfn6u y *kl s*e;ent 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 takes 45 min. What was the bear's average velo*et1;f**enljga8 kswyv6 un5 city?

  You are driving home on a weekend from school at 55 miyuyy 1t( x++p-0p s tw4palvl//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 /1p-t 4+pyvyxys (w0upll+ athometown from school?

  A motorist travels 160 km at 80 km/h and 160 km at 100 km/xqz9c u4c66c uh. What is the average spee6qu 6zuccc9 4xd of the motorist for this trip?

  A motorist travels for 3.0 h at 80 km/h and 2.0 h az1(thns (zlz,t 100 km/h. What is her average spenz(tzl sz(,1 hed for the trip?

  An airplane travels at 300 mi/h souh)xsn6lcjxm :s xst,az84,l1 th for 2.00 h and then at 250 mi/h north for 750 miles. What is the 4x1j xs8sln)t:z 6,cml a,s xhaverage speed for the trip?

  In a 400-m relay race the anchorman (the person who runs the last 100 m) for f(e. 6 l)cmoghteam A can run 100 m in 9.8 s. His rival, the anchorman for team B(mgelh6co) .f, 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 a stop afte -7pms78ori llr 10 s. The car's average velocity during deceleration was 52 km/h. What was the car's decelerpol8-7 rs7i lmation while slowing down?

  An airplane increases its speed from 100 m/s s5dv :.2ma069-yg jjanqxvm;z0km svto 160 m/s, at the average rate of vm:jxz.0 m;g k0vjm5a2-dv6nssa 9qy$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h accelerates at the rate o*m.dhb wb+m:z 9akqhps 9n74 z;4vpesf $2.0 \; m/s^2$. How much time is required for the car to reach a speed of 90 km/h?

  A cart starts from rest a5 qy beuo4db p s932w/)rmezn9nd 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 speedddxx ,i dy,1fl .g-px;s up with a constant acceleration of ,f ; lxdi1dxy gd,p.x-$2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial velocity of 2.5 m/s experiences a sek)+(jaoq rm(v9 e54t jbo;oconstant acceleration oftao)ok 9vb(ej+sq mr j5e;(o4 $4.0 \; m/s^2$. What is the cart's displacement during the first 8.7 s of its motion?

  A bullet moving horizontally to the right (+x directiont-w y4k*(7xt rw-f mbv) with a speed of 476 m/s strikes a sandbag and penetratfb(-k vwyt *47rwxtm-es a distance of 96.43 cm. What is the average acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane l(mewclp, d3*0indq/fk +8 qnwgv +f5is launched from a catapult on an aircraft carrier. It reaches a speed of 42 m/s at the endfpfcwl/ q3m+(*nlkdn+iv 805 dewqg , of the catapult, 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 constant acceleration of ltsr6owfn03y 77eu3 k$2.0 \; m/s^2$ 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 au.kfzl;8 spx0 3on0l bverage acceleratx0lp;38sfunzo b0 k.l ion?

  An object starts from rest and undergoes uniform acceleration. During tvsof8rtdk-dv9-)iu7 n6n tm * 4pq0dk he first second4ud vn-s8q 7kfri)knm6vo*dp t9d t0- it travels 7.8 m. How far will it travel during the third second?

  An object is moving in a straight line with constant accel uqbh0 iequr4(xy11+s eration. Initially it is traveling at 16 m/s. Three seconds later it is traveling at u1 q(usxhy4 qb i01+er10 m/s. How far does it move during this time?

  A car starts from rest and accelerates uej 4yod4, sxi,9bmu44zqdl u5 x;k6wuniformly 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 . rx ci, ym4h1tlfgg. 7gx7nd,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 traffic light turns green, a car that has m: g+(uujue y8a;cv q4been waiting at the intersection starts ahead with a consta:8 u q(auvmgcej;uy4+ nt 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/s4uswh4 l- c)gik8 3qzzb 2okry09hy x( on the surface of planet X where the acceleration due to (bs44yh zk l0k)8ycr2wq9 hxozg3iu - 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 a2xug)3tc:ey on the surface of planet X where the accelerat utxe ayc32g:)ion 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 aj/,t sxj0n f lb8cl2(b speed of 15 m/s on the surface of planet X where the acceleration due to gravity i (nj,stb/2 8bl xlfcj0s $2.5 \; m/s^2$. How long does it take for the object to return to where it is thrown?

  An object is thrown upward with a speed of 17 +)wiebh8 ftj:*( fsrh9edb fj8b*mu4 m/s on the surface of planet X where tjb9(h*e jbbeu8+*sthf 7dm ) fr8: iwfhe acceleration due to gravity 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 i5 -v fnjzs p:cwvlg:j l mjb2241y:5jfriend holds a ruler between your fingers and releases it without wafb wvzsl-51l4v cj5ipjg2 m y:jjn2: :rning, how far can you expect the ruler to fall before you catch it?

  A ball is thrown upward at a velocity of 1rlpp:4 meb,sd8h/71 zyn3touopl4. i 9.6 m/s. What is its velocity after 3.00 s?r3o1,to4.blze 7i uns lypmd8:p4h p/

  A bullet shot straight up returns to its starting point in 9 s. W xq -(izm7+v.k0 s kgrbxd9u)ihat is the initial speed of tru+q09-. (vkz)s dg ib xmk7ixhe bullet?

  A ball is thrown straight up with a speed of 36.0 m/s. How lonm;wi+(q*hg sfevgb6 8g does it take to return to its starting po i vf(shb; m86gwge+q*int?

  A ball is thrown downward from theo m rz:6dk+(bs top of a building with an initial speed of 28 m/s. It strikes the ground after 3.9 s. m do:6rzbs+( k How high is the building?

  A ball is thrown straighx;*fu5s(en x at up with a speed of 30 m/s. (only fill in numerical value in the blsx5e nf(*;uax anks)
(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 air6ehieb*6.wsj eo t7t, with a speed of 38.5 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 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 = 1.0v9gh/:. e(s0i+dj8wfevn dtqv7qy3b s?

  In Fig. below, what is the-nw3e4n::/v f ojluu r velocity at t = 2.5 s?

  In Fig. below, what is the ;g(34co ocetlvi52r y velocity at t = 4.0 s?

  In Fig. below, what is the velocity at t = 5.5 sz, hwzd o 27tem1bf(z9g.9hww?

  In Fig. below, what is the avej+2g mq egs2p*l3 cbc6rage velocity from 0 to 4.0 s?

  In Fig. below, what is the averan t01zo2abh r/ge velocity from 0 to 6.0 s?

  In Fig. below, what is t z:;e;- aybftd8we8dk he acceleration at 1.0 s?

  In Fig. below, what is the accelerx4wuqi r3x()i ation at 3.0 s?

  In Fig. below, what is the average acce 3wechj j7k 1o0wpa2qh.ar32dleration from 0 to 5.0 s?

  In Fig. below, what i /edphqcq95:f( : yvass the average acceleration from 0 to 8.0 s?

  In Fig. below, what is the dis) .h::pbvrj lwjb5m-vrmmxp a.)b5-hplacement from 0 to 8.0 s?

Does a car speedometer measure speep (i pas eort)2.y11c; wygz4bd, velocity? {speed|velocity}

  An object can have a3u p7zya .gp81kw8 nmb varying speed if its velocity is constant.

  The velocity of an object can be negat 4iijm/fsr( .uive when its acceleration is positive.

  If one object has a greater speed than a second(tp;y2o 7 bfnd object, the first must have a greater acceleration.(fpy2od; nbt7

  Two cars emerge side by szvl2 8 tp* y6civhk.7side 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 in speed a+4ch(x)hza tys its acceleration decreases.

  A baseball player hits a foul ball straight up into the air. It leaves the3seu:;bk3wjin)bpa 6 bat winep6 3;is:ja3)ubkw bth a 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 objext b,gfr )1)jpy 1.tl*;vuma,jv i l2vct speeds up, what is happening to its acceleration, how does it change if air frplt1,v.;xy1v jrm v2u)l, gti)jba f*iction is ignored?

  As a freely falling object speeds up kj3fhih(z+cz+a0f: o , what is happening to its acceleration, how does it change0i:+f hzk3 co+hzf(aj if air friction CAN NOT be ignored?

  An object that is thrownoavo xp0vmow +8l2 r3 ,+yusz, vertically upward will 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 alter+r,0p z8oalx 2+ v3uyso,owv med?

  An object can have zero velocity and nonzero acc;rbru6+mbpr1gb n u3;uae6v2eleration at the same time.

  An object can have nonzero velocityds 4.:jl8mvyn and zero acceleration at the same time.

  An elevator moving from the second floc k(m(je7w h0for to the fifth floor making no stops along jhef0 wm 7((ckthe way has zero acceleration all the time.

  A rolling ball moves from;j)*i q t tcpv70g5.b un3go,hfozni4k7 ihy* $x_1=2.5 \mathrm{~cm}$ to $x_2=-7.6 \mathrm{~cm}$ during the time from $t_1=2.5 \mathrm{~s}$ 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 $t_1=-2.1 \mathrm{~s}$ is at $x_1=3.0 \mathrm{~cm}$ and at $t_2=3.2 \mathrm{~s}$ is at $x_2=8.2 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete laps around a quarter-migm) ki,c 5zaj0l30f o+e1hwlq le ($1 \; mile = 1609 \; m$) track in a total time of 10.2 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 mh y)6)k0fctgagn; *oa straight line, moving 91 m away in 12.1 s. It then gn)* ;a60ghfkmcy to)turns abruptly and gallops halfway 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 froy: +h c/lbnor; d1lf*d/i4 zvcm $11 \; m/s$ to $25 \; m/s$ in 4.2 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 froln+ twrq(,8 aom $19 \; m/s$ to rest in a distance of 57 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must rhh-luw 9 ibas5nl0:rj, ,l,jpr-g kl :each a speed of $31 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $2.0 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinter can burst ouf 1j.l ;ilvz:r-uajen. qay *3t of the blocks to essentially top speed about:a ;j v1l n.urafe -i*yz3.jlq $10.2 \; m/s$ in the first 14.7 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 uniformly from a speeo./ uay,z g8o ij88kghd of $16 \; m/s$ to rest in 5.68 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 highdzq/l jl/+5kz7+fo;qn g+qtm way. Assuming a decelergl 7tkq f+j qnl+m5zzd;q+//o ation of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck 1yiloi o0)s h)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 10,000c/o,zd5;t 3hxrd 0eo e-m run in less than 30.0 min. After exactly 27.0 min, there are still 1100 m to go. The runnedteodh0 35rz o e;xc/,r must then accelerate at $0.20 \; m/s^2$ for how many seconds in order to achieve the desired time?    $s$