Suppose that an object travels froh)5 8x, ll3smlo rq,yym one point in space to another. Make a comparison between the displacemq hs8m5 ,o x,lyryl)l3ent and the distance traveled.

  When is the average velocity oz6bk zpic w2)ryi eg.pd15q:/f an object equal to the instantaneous velocity?

  A new car manufacturer advertises that their car can //n;lze(ehv siz ..p( wd+yncgo "from zero to sixty in 8 s". This is a l;w.zd pe/szcn/.hi+ (n (veydescription of

  An object moving in the +x axis experiences an acceleratiompw/(nldo; 9 o kxu(z7n of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to the East (+x direction) begins to5z gv+y79wv qf slow down as it a f9g57wvy+vzqpproaches a traffic light. Make a statement concerning its acceleration.

  Suppose that a car traveling to theef0u hfw/ha 2zfs,7a* West (-x direction) begins to slow down as it approachefuz fsa*wf/2e0h7a,hs a traffic light. Make a statement concerning its acceleration.

  Suppose that an object is moving with a constant velocity. Make a staivz8+vtsad/1 o0 b7 bzux6u j8tement concerning its accelera iu6jz18o ubzx7 t0 ba+v/d8svtion.

  If the velocity of an object is zero, does it mean that theopok 8)(e y-rk acceleration is zero? Support your answer w 8yk(erp-ko o)ith an example.

  Can an object's velocity nsbqjo urao, ,),i9l8 change direction when its acceleration is constant? Support your aas)u9, r,oq8jb oni l,nswer with an example.

  Suppose that an object is moving with constant acceleration. Make a 9f:w 2s6vbhvy0t ui-q statement concerning its motii6h:usq f9vt-0 bv2wyon with respect to time.

  Can an object have increasing speed while its accelerationj: n,6yzt5*zm ce9 w8xsyh8ds is decreasing? Support your answer witezhyt8n m*9xwyjz :5s ,cs86dh an example.

  Suppose a can, after an initial kick, moves up along ) s5 e+uzuli+ 90d/ernmhla,ga smooth hill of ice. Make a statement concerning its accelerat+gin ela e/)9 h5 rlsmu,0u+zdion.

  Under what condition is average velocity equal to the average of the objecty5f3cduqps i 5*b/x5 g's initial and fina yqps5 bi35 g/dc*fx5ul velocity?

  Objects A and B both staryq4: e*eb tqyc48b j :*hxrsx1t at rest. They both accelerate at the same rate. Howe:h 4s14ject8:r qbyb*exx * yqver, object A accelerates 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. They both accelerate at th+)nov5qnox3i8i e 9f+ p3ro8sdd u1lle same rate. However, object A accelerates for twicelpui5odli oe +vq sfd1 3o+3xn8rn) 89 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 2n8yj2d;4temddch,q2 6hqt ) qfe 9dd and falls in the absence of friction, which of the followinndd qd4 e2mcqhtdt96y j2 ;f),8 ehq2dg is true concerning its motion?

  When an object is released from rest and falls in the absence of friction, 7xsp o5am-bzt+4(;kchi/ge pyy+ 5zh which of the following is true concerning its motiohp-h+ absoy yk5+ etc5;zi m4z/p(xg7n?

  Suppose a ball is thrown straight up. Make a statement about the veloci ramzc js4, wp2lz;*zx8r67sbty and the acceleratir2s4zmz;,lwcazx*8 b 6s7pr j on when the ball reaches the highest point.

  Suppose a ball is thrown straight up. iczkoxw* 7j9)2s*+u ac q xe-m What is its acceleration just before it r*wi)eqk+u7*xscz c2m jo -x9 aeaches its highest point?

  Suppose a ball is thrown straight up, reaceuuuq gr,4)y(hes a maximum height, then falls to its initial height. Make a statement about the direction of the velocity and gr,uuq(u4 e)y acceleration as the ball is going up.

  A ball is thrown straigh17dwm-.sas d(xxep6 lt up, reaches a maximum height, then falls to its initial height. Make a statement about the direction of the velocity and acceleration as the ball is com xa(wd.-p67x1ms e dlsing down.

  Suppose a ball is thrown downward in the absence of air resistanv2u nwb5,pk+ice. Make a statement concerning its acu,nv b+ kp5iw2celeration.

  Suppose a skydiver jumps from a high-flying plane. What is her a.(c9 gs iryw,zcceleration when she she reaches terminal velocit( ziswgc.r,9yy?

  A ball is thrown vertically upward with a speed v. An identical secoc*t(lgu7g4l: bbvmnn.+ ;jdc8zgd f6nd ball is thrown upward with a speed 2v (twice as fast). What is the ratio of the maximum height of the second ball to thg:*umjvb4.b d dg n(+ 6ncfgzll8;7ct at of the first ball? (How many times higher does the second ball go than the first ball?)

  Ball A is dropped from the t2cf;l v5 qe2 2h.rr 38ptccagkop of a building. One second later, ball B is dropped from the same building. As hv228;tk p.cr qrglae 3cf2c5time progresses, the distance between them

  Ball A is dropped from the top ofd n vmwwz;* x7p.1fnf5 a building. One second later, ball B is dropped from the same building. As time progresses, the difference in thfnxw mpz5 .fwv n;1d7*eir speeds

  Two objects are thrown from the top of/+qs+0t j)w8d qdg7:ef v5m,zlzkybk a tall building. One is thrown up, and the other is thrown down, both with the same initial speed. What are their sp+fbw t ddm qv/5ezg0 :j87)q+k l,zskyeeds when they hit the street?

  A brick is dropped from the top j2rgd*f .j)pdin6gj6i5te8c nw u;, oof a building. A second brick is thrown straight down from the same building. They are released at the same time. Neglect a2c,ndgn6 ftj gjd;p8*r.i5e iuwo j)6ir resistance. Compare the accelerations of the two bricks.

  An object is moving with constant non-zero velocity in the +x axis. 9fwvqa2 qax,1l8nai kmu1c 47The position versus timeq vna,2f 18c74q9lu1 kxim awa graph of this object is

  An object is moving wng:d34fbcyk wkf (o63ith constant non-zero acceleration in the +x axis. The position versus time graph of this 6ky43fdkobng( cf :3wobject is

  An object is moving with constant non-zer+k 3p5xhr91hig(*g moks- cii o velocity in the +x axis. The velocity versus time graph of this obhk+9xi1o gcih(mg k*35rips-ject is

  An object is moving with const0no jq6sx 14xij9u+ptant non-zero acceleration in the +x axis. The velocity versus time graph of thp+uio x69 4tj0s1 qxjnis object is

  The slope of a position versus ti33; ; w7 l gyo;22kif;rm2lwsyhfkrihme graph gives

  The slope of a velocity versus time graph g sjspajxn7pwgx12. 20:7 66n eflwg dyives

  The area under a curve in 65mgozu k y1e/an acceleration versus time graph gives

  The area under a curve in a velocity versus time graph gqla7i w 6pff89ives

  If the position versus time graph of an object ( dn)0+spodcais a horizontal line, the object is +)aoc0ddns p(

  If the position versus time graph of an object is a vertical line, the object is)qvzx kzw++ w0qw ++z0kzv)wx

  If the velocity versus time graph of an objec :wq60m n0 h8*wtyxuput is a horizontal line, the object w pum:nq68u twyh0x* 0is

  If the velocity versus time graph of an object is a straight line makanvyyk r/9v;02o liv0p )/cyping an angle ofvn/cl)ryy0a;0 voiy9/p vk2 p 30 degrees with the time axis, the object is

  An object moves 15.0 m north and then 11.0 m south. Find both the dl5xr ui8/ r*onistance traveled and the magnitude of xn *5iur/ o8lrthe displacement vector.

  A boat can move at 30 km/h in still water. How b9wv gyuf;m4+)vz(wy long will it take to move 12 km upstreayzm; f(4 ) wvb9uvwy+gm in a river flowing 6.0 km/h?

  55 mi/h is how many m/s?8nl*).gin31w sp:y rq kt2loq (1 mi = 1609 m)

  What must be your average speed in orcsqw3m4 26qs,h swn, oder to travel 350 km in 5.15 h?

  A runner ran the maratf il5 s( i*1r zuota;-c33hwcdhon (approximately 42.0 km) in 2 hours and 57 min. What is the average speed of the z cw -*1;3laohcit3f(rd sui5 runner in m/s?

  A car travels 90 km/h. How long does *t;u)v+ d1px ,mmewuy it take for it to travel 400 km?

  A ly (light year) is the distance that light travezq (f;m,aat8d sq:e/a a7ym 8 9mn j-chso2wf(ls in one year. The speed of light is (oq28 y8 he- q (asfw mzfmd,ctaasn; :9jm7a/$3.00 \times 10^8 \; m/s$. 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 roa;lg y07vuh)(u2lrb qw1 8g/usamtj . yd and you look to the side for 4.0 s, gmls.7wl(a)trgy2bvuu 1q/u0;8j hy how far do you travel during this inattentive period?

  If you run a complete loop around an outdoor track (400 m), in 100mt2lwbt *rfx477t;gt s, your average ve7 7x*mr t42bg ;tltftwlocity is

  A polar bear starts at the North Pole. It travels 1.0 km south, then 1b,qs1qt)n2 l/zd6g xo.0 km east, then 1.0 k2/s6og ,1 )x zdtbqlnqm 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. zle: ng gwkr2n.2ji3 -; zu7cz 64csck 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 startingc.sl76kj3z;k c-egun4wr z2g cnz:i 2 point. This trip takes 45 min. What was the bear's average velocity?

  You are driving home on a we-rjter6 vrv y d.w(y)*ekend 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 h.y j rw)vrdt*y -6(ervometown from school?

  A motorist travels 160 km at 80 km/h and 160 km at 100 km/h. W de r 5ea1ot8+kx.1 xlyzedk:e(4ez)qhat is the average speed of the motorist for this trzetd+le1xy (ea )ez:k84 o kdx51qe.rip?

  A motorist travels f3+ 5ai2fwb qsafc a:z g.y.gt.lbkd 8.or 3.0 h at 80 km/h and 2.0 h at 100 km/h. What is her average speed for f2q 53z8+ak. .bld:cgby.waa.si f gtthe trip?

  An airplane travels at,*i o/kg+ r7 8u8b5nrlyaeh la 300 mi/h south for 2.00 h and then at 250 mi/h north for 750 miles. What is the average speed for the *r,7geh+8larul/i5b8 ykon atrip?

  In a 400-m relay race the anchorman (the person who runs the last 100 m) c l1quy j)7j7. a2dkll*jeyd6 for team A can run 100 m in 9.8 s. His rival, the ay 7d.6lyjqj l*l2j7ec)udk1 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 lose the race?

  A car decelerates uniformly and co 2zjss,szh+t-mes to a stop after 12 s. The car's average velocity during deceleration was 38 km/h. What was thezsj, -s2s+zht car's deceleration while slowing down?

  An airplane increases its sp-vjxs0lfea-u 7r 4v *peed from 100 m/s to 160 m/s, at the average rate of *7 jefv0avurlxs- -4p$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h accelerates as1ns7anal )n 0t the 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 aava20 uz:vx 0gt $4.0 \; m/s^2$ 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 1* uo0m/l 4v4mk1f2q b,qo goon0 s. It then speeds up with a constant acceleration ofgmko fvm14 *obnl0uo,oq4q/ 2 $2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial velocity of 5.fpv1srvk ,3 2k0 m/s experiences a constant acceleration of 2p kfvv,r31sk $3.5 \; m/s^2$. What is the cart's displacement during the first 6.7 s of its motion?

  A bullet moving horizontally to the right (+x direction) with a speed of 58 pvmtvm-b.0 e4qhr2j )2 m/s strikes a sandbag and penetrates a distance of 56.92 cm. Wv)qb te40m2m- .hvr jphat is the average acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is launched from a catapult on an aircraft carrier. uz u7q*2w ri*k,*jh* gw nxnu.It reaches a speed of 42 m/s at the end of the catapult, and this requires 2.0 s. Assuming the acceleratio*7 r2u*.ui nx*wk*j, wnqhu gzn is constant, what is the length of the catapult?

  A car starting from rest moves with constant acceler 4mvf.tdvb+ +uation 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/e.xuw8o9 r,)vujk 1lug:k ay: s to 80 m/s in a distance of 200 m. What is its average acceleration, g:xua ) l1w:okj .yeuvr9u8k?

  An object starts from rest and undergoes uniform acceleration. During the firs7oput. 7:hszt9kncfdq i405 )0b0x9j ttb t vyt second it 4 t09kxb0ztufco0j7).ib t5 9d7tsnhpty :qvtravels 9.8 m. How far will it travel during the third second?

  An object is moving in a straight line with constaw00wj3b6hq:gnck y klq 391oa nt acceleration. Initially it is traveling at 16 m/s. Three seconds later it is traveling at 10 m/s. How far does it move during this 0qjwlky 0:9 kacbwq31hong63 time?

  A car starts from rest and accelerates uniformly+qj bh *nzrm6q6wf b44c0ubw7 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 deceleratehqss4)pl9x0(xe/9p hlpmc+v 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 tha8v 3m-ecceb8 iw3 crj9t has been waiting at the intersection sv8mr8iecjb 39 e-cw3 ctarts 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 upwardc2ddkne * c;je *j,v;;rojq 4b with a speed of 12 m/s on the surface of planet X where the acceleration due to gravieqbvdk*4n;cej,; jjdco * ;2rty is $1.5 \; m/s^2$. What is the maximum height reached by the object?

  An object is thrown upward with a speefgncc d:62(t kd of 12 m/s on the surface of planet X where the acceleration due to gtcn2( :f6cgdk ravity 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 rj: l0 q(er49n jibwu,speed of 15 m/s on the surface of planet X where the acceleration due to gravityr, (jw40b:urlni eqj9 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 oq3- kox:ro5 zp:ahj9p v:gm;yn the surface of planet X where thr yj:z gpap;5k qho:3o:-vm x9e 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 op2u laol4pw:i ;x(8u your friend holds a ruler between your fingers and releases it without warniwuo aui;8 plx4pl (2:ong, how far can you expect the ruler to fall before you catch it?

  A ball is thrown upward at a velocity ajp -fs-w e3)gf3jn k2i *s0d2s3 1q ul,sjkmmof 19.6 m/s. What is its velocity after 3.00 s)jm m3 k* --p2wf 2qsn3 augs3esfs1j0i,jdlk ?

  A bullet shot straight up returns to its starting point in 8 s. What iinmu-. 5d6+/7 a ritoxuil i5mpsmc16s the initial speed of the bul m.iauid+t mi56/nr-c 6x715pli musolet?

  A ball is thrown straight up with a speed of 36.0 m/s. How long does io 3hu6u,amu b/t take to return to its starting3b,ma6ou/ u uh point?

  A ball is thrown downward *mht- sxzlx71from the top of a building with an initial speed of 7 m/s. It st7m1 xtszl *hx-rikes the ground after 6.0 s. How high is the building?

  A ball is thrown straight up with a speed of 30 m/ym;r; l zki0(js. (only fill in numerical value in the bl;mki ;0zjr(yl 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 strai3hzd,dlw 3js /ght up into the air with a speed of 22.9 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 1 seconds later.  (数值)  $m/s$
(e.) Determine the time at which the ball pass a point 13 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 13.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what is d;erf6h ix(x5 h-,h hrdykb2 /the velocity at t = 1.0 s?

  In Fig. below, what is the velocity at ggjdrxmg 9cd9eslm +zm/0),b.m7 a9lt = 2.5 s?

  In Fig. below, what is the velocitdj d*r e(i ,02huj;fpay at t = 4.0 s?

  In Fig. below, what is the velocity/hrf q4xg c gw69;hx-x at t = 5.5 s?

  In Fig. below, what is the average:r g4ckdt7.pfob2)dr* 4fx m8sl4 z h9wd1ski velocity from 0 to 4.0 s?

  In Fig. below, what is the average vtyt ph* cz)q9 ,zo;q+oelocity from 0 to 6.0 s?

  In Fig. below, what is the acceleratn ov+ vyo8l2bjva *6q9.xjym+ion at 1.0 s?

  In Fig. below, what is the acceleration at 3.0 s?-*o ;ce l7llxk

  In Fig. below, what is the average acceleration 6+6 sautl p:yjfrom 0 to 5.0 s?

  In Fig. below, what is the average acceleration from 0 b8lfqrz5 5-r,2q .ne*p n25 ;q rchh xf*hzrmuto 8.0 s?

  In Fig. below, what is the displacement fragot ,/sprlm-tmq8y0c/ l ntj. +kw8:om 0 to 8.0 s?

Does a car speedometer measure speed, velocity? {speed|veloci ;l0b ;czzcwf4ty}

  An object can have a vb 6d+wwt)g )j6) lprqgarying speed if its velocity is constant.

  The velocity of an objecd dx 6rnghub;/a8p17ct can be negative when its acceleration is positive.

  If one object has a greater speed than a second object, the firs(1r ik w8jawd5t must have a greater acceleration1rwj8 di5(akw .

  Two cars emerge side by side from a tunnel. Car A is traveling gsy +d; 0ky+uqwith 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 acceleratio;i* j36* lvgi2vxnzxun decreases.

  A baseball player hits a foul ball straight up into the ai.h k78avv*1(g :i axj*1-t lqhtckvbgr. It leaves the bat with aa:vht1g v *v8l*k-x(7.1kbhaq gt icj 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, what is happeningmtwf8 loon 7uni(oo 323 pt6,b to its acceleration, how does it chani2 7l uttf33n,6oowo(bo8 pmnge if air friction is ignored?

  As a freely falling object speeds up, what is happeninan3d w1.fr(gp g to its acceleration, how does it change if air fricd(npragw. 3f1 tion CAN NOT be ignored?

  An object that is thrown velcvxb g, /,8ugrtically upward will return to its original position with the same speed as it had initially if air resistance is negligible. Ifb/gu,lg,x8v c air resistance is appreciable, how will this result be altered?

  An object can have zero velocity and nonzero accelerar+e+u. :b 8f -lijogahtion at the same time.

  An object can have n 9ll2o9sq:bv l iu87qionzero velocity and zero acceleration at the same time.

  An elevator moving from the second floor to the fifth j88,s (*q zvy3b -1eoephwt 2wjva/ji floor making no stops along the way has zero accelerationj3o b/jq8yv,j st *a epi-wewz1(82hv all the time.

  A rolling ball moves frofh7ex;em ujxc;2k . z+m $x_1=2.5 \mathrm{~cm}$ to $x_2=-6.6 \mathrm{~cm}$ during the time from $t_1=1.5 \mathrm{~s}$ to $t_2=5.4 \mathrm{~s}$. What is its average velocity?  (数值)  $cm/s$ (only fill in numerical value please)

  A particle at $t_1=-4.5 \mathrm{~s}$ is at $x_1=2.7 \mathrm{~cm}$ and at $t_2=3.2 \mathrm{~s}$ is at $x_2=8.1 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete lrvn:z: 4kj9a+cmdlf 8aps around a quarter-mile ($1 \; mile = 1609 \; m$) track in a total time of 6.1 min. Calculate (a) the average speed  (数值)  $m/s$ and (b) the average velocity    $m/s$

  A horse canters away ra-rk9e/ryo.kn +e55msch9.0dd dvy from its trainer in a straight line, moving 86 m away in 10.9 s. It then turns abruptly and gallops halfway back in 4.7 s. Calculate (a) its a-hk9r oc9 k.ys0 der/medv5y5ra n+.dverage 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 joljkpoqstw+fk .1:c.( *lj) $11 \; m/s$ to $24 \; m/s$ 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 frodv -49g 3-ust )bojgllm $16 \; m/s$ to rest in a distance of 78 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reach aaw fit1a,.5,ttagd3 c speed of $31 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $2.1 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinter can burst out of the blocks to essentially top speed ar9faz 4y hhx-4lfq +q;boutxhqfzf-yr94qa+4 ;l h $10.2 \; m/s$ in the first 12.7 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 ,xf:fo ff 0y e0bq1d10n;gwks5sx/n l from a speed of $16 \; m/s$ to rest in 5.28 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 highway. Assumgqddh/ )h/;m)w+ wzgoing a deceleration q/;omg /dg)w dwhz)h+ of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck goidpjska dc.h2u;t 2m1 9ng $25 \; m/s$ 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 3qk5ur4e0w * aqpec yg7t1gqhh/q,m4 30.0 min. After exactly 27.0 min, there are still 1100 m to go. The runner pm4uqc1hgyqe374et, /k*ar h50qw qg must then accelerate at $0.20 \; m/s^2$ for how many seconds in order to achieve the desired time?    $s$