Suppose that an object travels from on qlix0:)8fu.z:mo nmie point in space to another. Make a comparison between the di8zm.) fl0:xnu:mi o qisplacement and the distance traveled.

  When is the average velocity of an object equal to the instantaneous velocityl7 * zql (yq-(vs0yfrz/ b9qgc?

  A new car manufacturer advertises that their car can go kfpt;qe;w;c1 "from zero to sixty in 8 s". This is a description ;qpce f wkt;;1of

  An object moving in the +x axis ex f)hj0dy sr8x4periences an acceleration of $2.0 \; m/s^2$. This means the object is

  Suppose that a car travelik.*eq * .vv7icasg+ i2gbzc g ln/vnn84me0v+ng to the East (+x direction) begins to slow down as it approachel8z0 *gv4vc7m c+/sn baei v n+ enig*g.k.2vqs a traffic light. Make a statement concerning its acceleration.

  Suppose that a car traveling to the West (-x direction) begins to slow down as *g wbp)khv;a-j+ nx8t it approaches a traffktpn)wxj8a *b;h -vg+ic light. Make a statement concerning its acceleration.

  Suppose that an object is moving with a constant velocitdy);mp2m-r d ,/vqvwdy. Make a statement concerning its acceleratioq,mvdwdp 2) -r;dy/mv n.

  If the velocity of an object is zero, does it mean that th4p cdq ;bqw7r*e acceleration is zero? Support your answ7; *bc wrp4qqder with an example.

  Can an object's velocity change direction when its acceleration is constant? Suyg2:clu 3a a7spport your answer with an exa:a u7s 23lgycample.

  Suppose that an object is moving with constant acceleration. Make a st2t4h z/(f *umlh nl6hfatement concernfm (2*h/nlhul6fhz 4 ting its motion with respect to time.

  Can an object have increasing speed whilec)* i 5j)ltfjhoo/e2ww)d pb6 its acceleration is decreasing? Support your answ)wdo b)*fj 6jc)p2t hwi/eol5er with an example.

  Suppose a can, after an in1)spg1ipf0+ +im3b* xv5ujoc7 ey kesitial kick, moves up along a smooth hill of ice. Make a statement concernbg+p1vuxkiei)msf0jec 5o*+s p1 y 73ing its acceleration.

  Under what condition iao 1.wauaonas *:iz-* s average velocity equal to the average of the object's initial and finuaa-.an wso*1i : azo*al velocity?

  Objects A and B both start at rest. They both accelerate at the same raterz: ng.hf9sb7rb v,s7. However, object A accelerates for twice the time as object B. What is the final .r v7g7z f,:9b nrhsbsspeed of object A compared to that of object B?

  Objects A and B both start from rest. They both acceles+lyz6gzn. 5y rate at the same rate. However, object A accelerates for twice the time as object B. What is the distance traveled by object A com5 .z+n zly6ysgpared to that of object B?

  When an object is released from rest and falls i-8e q-g*lpifkn the absence of friction, which of the following is pef--g8 qk*li true concerning its motion?

  When an object is released from rest and fallshkh)*q2.ujm (- ahtpo in the absence of friction, which of the follopa hm2 *(hj)htuo.q k-wing is true concerning its motion?

  Suppose a ball is thrown straight up. Make a stamavo +gntv9749qo pw8tement about the velocity and the acceleration when the ball reaches the highest 97 mgp +atn 9ovq4vwo8point.

  Suppose a ball is thrown straight up. What iak) sh4r 0tzlin rj5f-(m-1bzs its acceleration just before it reachirmt) 0lz b s5( 4jz-1kafr-nhes its highest point?

  Suppose a ball is thrown straight up, reaches a maximum height, then htl 0)iuyl:*c falls to its initial height. Make a statement about the direction of the veloi c*h:)tlu0 lycity and acceleration as the ball is going up.

  A ball is thrown straight up, reaches up3fx3nv1xlwj; f8 ny 8 x7kb5a maximum height, then falls to its initial heig;35jyunxf x b v837wkpx8f1lnht. Make a statement 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 g 9 wo:isp61 onrf6,ym ho6nv4resistance. Make a statement concerning iop:v64 1 i,hnm6owsog9 nf6yrts acceleration.

  Suppose a skydiver jumps from a high-flying plane0blbb/o2fm3 z c mx02n. What is her acceleration when she she reachem obbfbn 2 0cm2xl/03zs terminal velocity?

  A ball is thrown vertically upward with a speed v. Anqm4z6g,h zejp g .40nx 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 he0 mg.4zz 64nqpxj,gmany times higher does the second ball go than the first ball?)

  Ball A is dropped from the top of a building. One 0lnv1 pcchn7kvn* .i6 wkzm+(second later, ball B is dropped from the same building. As time progresses, the distance (cpniwvn 1m.l06kk nc zhv7*+between them

  Ball A is dropped from the top of a building. One second later, ball B is dropat v t8lx)af;y+o76dlped from the same building. As time progressat6fdl+x;tlo 8)y av7es, the difference in their speeds

  Two objects are thrown from the top of a tall building. e,q d05 d2u4c+ lhqufmde2 +jkOne is thrown up, and the other is thrown down, both with4j+md5 c+e20 fuqe2lq ,kdduh 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 brick is thrown stacdkd y/ttw 0 g2)/r 0*l,lhz-d ghv(oraight down from the same building. They are releas)vth dlldgkzc2y0 (/-,d* 0tw/hrogaed at the same time. Neglect air resistance. Compare the accelerations of the two bricks.

  An object is moving with constant non-zero velocity in t k(wi*rrb2/2hz3 (3yad iezdd he +x axis. The position versus time graph ofz3hz3waek/ d d(2 dri( y*b2ri this object is

  An object is moving with constant non-zero acceleration in the +x axis,,mi 8+bozexe q m*0zr. The position versus time graph of this omzq z,e mo, xe0i*b8+rbject is

  An object is moving with constant non-zero velocity in the +x an7) lj o7:fci bgrc4-c g1fjs2xis. The velocity versus timenij- c72o l7:sgc)f1rbc fgj4 graph of this object is

  An object is moving with constant nuas6(k( ,fjbk3m etcwoy)8 vu c9p8z 4on-zero acceleration in the +x axis. The vel j4)f8 8,cb(uyskuve69c kmaow(3 t pzocity versus time graph of this object is

  The slope of a position versus time graph;vouw+ b*ia7swef; 3 ru(vx) x gives

  The slope of a velocity versus timg r.rw 50lhltu fyn+y,i1 1yavzb :ojc;(8o)pe graph gives

  The area under a curve in an acceleration versus time graph ,aw nf 4c.zx5(0kc2bailt *m jgives

  The area under a curv0psd/h9 aek b-e in a velocity versus time graph gives

  If the position versus time graph of an object is a horizontal line, the objf (*kanq5ff9cx)(p(zm8ikaro x3 m-b ect ia(fkmo 3x xp5 8fkr9*(z-i()aqcf mbns

  If the position versus time l(ha4, chh 4ajgraph of an object is a vertical line, the object is a(l4ch4jhh, a

  If the velocity versus time graph of an o2k o 4 - :juqehu+zlu07obki7e q(jk8qbject is a horizontal line, the object ou qek:jl +k80iub2qh-7k (z o4ju7 eqis

  If the velocity versus time graph of an object is a de7eg2e; d:ol6n6 w7 ro/agzwstraight line making an angle of 30 degrees with the time axis, the obwaee: 7 l r6eo7g2/;ddzog nw6ject is

  An object moves 15.0 m north and the:y f)1c7 tgdefn 11.0 m south. Find both the distance traveled and the magnitude of the displacemdf) e7y1c: tgfent vector.

  A boat can move at 30 km/h in still water. How long will it take to move 12 k3nwvhd(o0 zn5 m upstream in a river flowing 6.0 km/h wh v3on(n0zd5?

  55 mi/h is how many m/s? (1 mi = 1609 m) zzq g,fw33/nk

  What must be your averp)j6fr9rynn/ i hbt+q gw9: d*age speed in order to travel 350 km in 5.15 h?

  A runner ran the marathon (approximately 42.0 km) in 2 hours and 57 min. Wf vdxfq n6cfx/o0cbfsr::ls549y;b( hat is the average spc s:5 flb(nc bxffrox4yd /s90f;q: v6eed of the runner in m/s?

  A car travels 90 km/h. Hou 9bbag y9j vyg5k0c)-w long does it take for it to travel 400 km?

  A ly (light year) is the distance that light travels in on ;0prfci lhh hc b5p9ff0rk5w2l*ru7(e year. The speed of hh u fl2if;0(5fcl0rh pwrk5b p9c7r*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 straight r 0irre:bsdg,c bcokry. .*0zo -mc u/8oad and you look to the side for 4.0 s, how far do you tra, uck08i :ezgrb 0moyc- do./b*c r.srvel during this inattentive period?

  If you run a complete loop arounh:j cw5 fvrug ;r+8:lh1mg;fc d an outdoor track (400 m), in 100 s, your average vg ;uh frm fl;j+w: c5r:gvh8c1elocity is

  A polar bear starts at the North Pole. It travels 1.0 km ss;ctn (sp5n3.zq + gsyouth, 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. p y3gc;st5qz.(s s+nn What was the bear's average speed?

  A polar bear starts at*f6w xqu/ qsg- the North Pole. It travels 1.0 km south, then 1.0 km east, then 1.0 km noq*-f ux g6wq/srth, 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 on a weekend from school at 55 mi/h for 110 0ouwx ; ym:v( nccdg/**wws.emiles. It then starts to snow and you slow to 35 mi/h. You arrive home after drivdgxwoe n.yuc/ *;w( vm*w 0c:sing 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. e 3g83dp) udtl What is the average speed of the motorist fordu3 e3gpl)t 8d this trip?

  A motorist travels for 3.0 h at 80 km/h and 2.0 hdu t9p4lft9a, v:;hpy at 100 km/h. What is her average spee,ppt dy v4:u99ht;lf ad for the trip?

  An airplane travels at 300 mi/h south for 2.00 h and then at 250 mi/h nor a2z kul8gqx+k9tk)*yxd ,r;tth for 750 miles. What is *8 tlxrx a kd9tk+ 2;ky,)guzqthe average speed for the trip?

  In a 400-m relay race the anchorman (the person who runs thee.9)klch lpq/zv .3h x 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 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 th k )xpe9.vc.3zql/ hlhe race?

  A car decelerates uniformly and kd(i,3 mwa7we comes to a stop after 11 s. The car's average velocity during deceleration was 76 km/hwm3, e a(w7kid. What was the car's deceleration while slowing down?

  An airplane increases its/o n5fdoa;54dv ja;, hzf5ejr speed from 100 m/s to 160 m/s, at the average rate of 5rv;o,a;nfzo5d 4/d5f jjhea $15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h accelerate5y2)9mlv 6gxao z xpn2s at 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 2 (eqwsis: q.dl 3gf6xwfqx. tql 1m zksh-;7*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 t7hnr . juhkvo j/o9.s.hen speeds up with a constant acceleration of k.v9/ u.7hhjo.jrno s$2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial velocity wexhc 8f5 n:l 4(a+rd)my+fgfof 2.1 m/s experiences a constant acceleration of wrnm:hdgy+cxl)a+f54f8( f e $2.9 \; m/s^2$. What is the cart's displacement during the first 4.5 s of its motion?

  A bullet moving horizontally to the right (+x direction) with a speed of 574 m/.,y3a/umtafo2-fr, m (ipggys strikes a sandbag and penetrates a distance of 70.10 cm. What is the average acceleration, in m2 tg/a,y-y, oa3i(gmr .fupf $m/s^2$, of the bullet?

  A jet fighter plane is launched from a c v3+ gekesnz+ke* 4a.syd). jgatapult on an aircraft carrier. It reaches a speed of 42 m/s + g .+snk ysevge*)a4e.jzkd3at the end 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 wit;.9sb nmgx40dytswacx5 -1r jh 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 ofoom dai(95.kx 200 m. What is its average accelerdx.o9 5ima(ok ation?

  An object starts from rest and undergoes uniform acceleration. During the firq 6 2g bl0xe*trbtb3bass(4i3 st second it travels 2.9 m. How far will it travel during the thirr4li32t gsb6 bqstebx*0( b3ad second?

  An object is moving in a straight lilzpd5su wk rq*kdtt 9i*i5ba*u 6em*781:nb gne with constant acceleration. Initially it is traveling at 16 m/s. Three senbes wq5gdb9 ud* 8*1pk6t:aimui57l z kt**rconds later it is traveling at 10 m/s. How far does it move during this time?

  A car starts from rest and accelerate05c -olahl j(ptv6 oc*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 road can ely*2d, -*nn4moragezgx 3d + 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 tbh 6-pi /+ka.ry 75yao*eotqgreen, a car that has been waiting at the intersection starts a rpe+y7.k/btot 6q-hoaiay5*head 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 ok8lb 8 1to98 pu/hog:qthb/rn f 12 m/s on the surface of planet X where the acceleration due to gravity r/opthk9/gl 8o b 8h:nuq 1t8bis $1.5 \; m/s^2$. What is the maximum height reached by the object?

  An object is thrown upward with a speed of4v 3m y:j8dr)6wzww8oqxn/fv,x-y vz 12 m/s on the surface of planet X where the acceleration due to grazwo8y jmqf 6d34v v/wn-z )x,: 8wryvxvity 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 the surface of planee8y d fda8u3/(xtjumkv8(cp/t X where the acceleratd 8ukc8/8d(mu3f yje x/p(avtion 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 jikr:9 p2v 34xb)o)je r-obby14 m/s on the surface of planet X where the acceleration due to g4 2eboo brkr y9:) jvpibx)3-jravity 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 fr2)58q b :xnaozb+hubjiend holds a ruler between your fingers and releases it without warning, how far can you expect the ruler to fall bebbz)hob8n : uaj5q2 x+fore you catch it?

  A ball is thrown upward at a velocity of 19.ltle8x* 2v)y+f ;.li0ur wv.w sin c5l6 m/s. What is its velocity after 3.0.x sn0v .*)iw lfiulv+l28ry5w; celt0 s?

  A bullet shot straight up returns to its starting point in 5 s. u :wow.bejy/k;h* q4f What is the initial speed of the bull:y4o ek wu.h;j w/fqb*et?

  A ball is thrown straight up with a speed of 36.0 m/s. How yezjc i+*r(dv 5um/1zlong does it take to return to its starting poi vymr(5i j+dez*cu1z /nt?

  A ball is thrown downward from the top of a building with an initial speed ofidi(r.yassb+ s / r65c 13 m/s. It stri.6 a(srr d5y/sis+b cikes the ground after 5.5 s. How high is the building?

  A ball is thrown strai 7z/lor;e6lczf+j4m8ghojvp9 f:8qd p,bqf;ght up with a speed of 30 m/s. (only fill in numerical value in the blank4 o9;fp8 f/v+6 mpl el :djb8qojqc;frh7g,zzs)
(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 i h kfv6 ssh8xx4)8fn(vnmq ok/:m+nb/nto the air with a speed of 32.8 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 10 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 10.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what is thel w.v* i;iyjq4 velocity at t = 1.0 s?

  In Fig. below, what is the velocity amc9 ,pb 3hc8 n um-tx9umox9)lt t = 2.5 s?

  In Fig. below, what is the velocity at t = 4vr-1no w2nef5icp5 k( .0 s?

  In Fig. below, what is the velocity qwaf j(b/3k;iw;+*h n yh/vzlat t = 5.5 s?

  In Fig. below, what is the average velocity fr2g q: i9)8onz:zasm bgom 0 to 4.0 s?

  In Fig. below, what is the average wyg-3x ) m eo/7lv+wz7nzw7bj velocity from 0 to 6.0 s?

  In Fig. below, what is the *9w8ap mb27r xhwg c)pacceleration at 1.0 s?

  In Fig. below, what is the a*6u ht28hv re7xqg2v ecceleration at 3.0 s?

  In Fig. below, what is the average acceleration from 0; rvnsr) h 7rqpy.c yxy00(( c+08zansvydc5k to 5.0 s?

  In Fig. below, what is the av5o02 peztlsx(2z -w iverage acceleration from 0 to 8.0 s?

  In Fig. below, what is the dis93lu i 8kd7u;y hbeyx6placement from 0 to 8.0 s?

Does a car speedometer measure speed, velocmr k0rc:2 vm n808ddgjity? {speed|velocity}

  An object can have a varying speed if itqn ci(n4k+,yss velocity is constant.

  The velocity of an object can be negative when itzb,y fx e.c*7+i kt7tt0jgv2l s acceleration is positive.

  If one object has a greater speed than a second object, the first +fiol8b (n3 xu,4gaq9p e8ppemust have a greater accelb 8(aop9gqn+ euifxppl4 3,8eeration.

  Two cars emerge side by side from a tunnel. Car A is traveling with a si p6ytd ko 4 0o*u(a.;2akslfvpeed 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 acceleration dec ky * ggn5(2pscpcp25mreases.

  A baseball player hits a foul ball straight up into the air. It leaves theqr3l0g/.u, wsr42xhgo ;zb ox bat with xgo2.o , sw; x/rugz043l qhrba 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 isxk+imyobmh t wm1,p) ) ,z*8oa happening to its acceleration, how does it change if air+8maz)k*,o tp )bwxomh 1,y mi friction is ignored?

  As a freely falling object speeds up, what is happening to its acc7; e sm.3myu(dvc v:gtph5i7 leleration, how does it change if air friiydvgtu73; h m s :mp.ecl(7v5ction CAN NOT be ignored?

  An object that is thrown vertically upward will return to its orig7ua:u :tyvi;tinal position with the same speed as it had initially if air resistance is negligible. If air resiytitv: 7: uua;stance is appreciable, how will this result be altered?

  An object can have zero velocity agy lez+x,ft/ a:h,0 nw*(m ibvnd nonzero acceleration at the same time.

  An object can have nonzero velocity and zero acceleration at dfp quwz(9hr 743p :skthe same time.

  An elevator moving from the second floor to the t3lp(v8ufrr1 fifth floor making no stops along the way has zero accele(prflurt3 v81ration all the time.

  A rolling ball moves frozl:+w7/6: 5b:vy isulf smlpe m $x_1=2.4 \mathrm{~cm}$ to $x_2=-6.5 \mathrm{~cm}$ during the time from $t_1=2.7 \mathrm{~s}$ to $t_2=6.1 \mathrm{~s}$. What is its average velocity?  (数值)  $cm/s$ (only fill in numerical value please)

  A particle at $t_1=-3.3 \mathrm{~s}$ is at $x_1=2.8 \mathrm{~cm}$ and at $t_2=4.2 \mathrm{~s}$ is at $x_2=7.4 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete laps around a quanv 4zgw/3*zv,jw4tew ra qvb):zmg 27 rter-mile ($1 \; mile = 1609 \; m$) track in a total time of 9.0 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 89 m away in 12iq lc; +6nqm* txjdf,5.3 s. It then turns abruptly and gallops halfway back in 4.8 s. Calculate (a) its avert m,q5 j+;qil*xf6dncage 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 frogka-vm pkt:z*9wb w og +,2/osm $12 \; m/s$ to $22 \; m/s$ in 5.3 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 fromax0k01cf 1df y-osk8wqgh 8c; $20 \; m/s$ to rest in a distance of 62 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reach a speed;fea.5c5jcyoq wys-)r * ja6r of $30 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $2.8 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinter cqxbm/qnuvrb6 2-1 d8ban burst out of the blocks to essentially top speed about 2bbqrdv8 nqx-m/1 b u6$11.5 \; m/s$ in the first 11.4 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 fro dx,j35dlx)xgjln j :.m a speed of $16 \; m/s$ to rest in 4.42 s. How far did it travel in that time?  (数值)  $m$

  In coming to a stop, a car leaves skidy wms2zpz 9g35 marks 92 m long on the highway. Assuming a deceleration935wp yzm2gzs of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a trx;yg 1skb/v; duck 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 xk5u+k.l u ohz1rnw3830.0 min. After exactly 27.0 min, there are still 1100 m to go. The ruhk31w8unz+xl . ru 5oknner must then accelerate at $0.20 \; m/s^2$ for how many seconds in order to achieve the desired time?    $s$