Suppose that an object travels from ogai jd1k 1l(-cne point in space to another. Make a comparison between the displacement and the distance travele -(lid1c kag1jd.

  When is the average velocity of an object equal .8vdlom/:eusu3- a (jfm iav. to the instantaneous velocity?

  A new car manufacturer advertises that their car can go "from zero to sixty in 8/htsg.6 bag23 .ktbef h8/iz i s". This is a desc/b.kf6hze./ia 3bst git8hg2 ription of

  An object moving in the +x axis experiences an acceleratiogdt8( :c vy0pbn of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to the East (+x direction) begins to slow dom z5v dlipyc;o;7x,s:wn as it approaches a traffic light. Make a statement concerning its accedx m :;sp, ;ivo7cylz5leration.

  Suppose that a car traveling to the West (-x direction)f7m-eev0u4 lh:n3v g g begins to slow down as it approaches a traffic light. 73 lf4v-m vegengh:u0Make a statement concerning its acceleration.

  Suppose that an object is moving with a constant iulw/0g.jc kfy0 5fj; velocity. Make a statement concerning i u0.ljffky 0cwj5/g i;ts acceleration.

  If the velocity of an object ishv;:tz(6obt.o0hw3 mz mia p(lfs:a; zero, does it mean that the acceleration is zero? Support your answer h;t:ml ai(stpo3mv(.0whbo ;a 6z :fz with an example.

  Can an object's velocity change direction when its acceleration is yu d/ ez6m+(1ie/ hwynconstant? Support your answ +eze(wi/ yhyun1d /6mer with an example.

  Suppose that an object is moving with constant accel.z2+s8lm5;o i eg;ldhoj e4kmeration. Make a statement concerning its motio som lk eo+8lz2gihm;;e45.djn with respect to time.

  Can an object have increasing speed while its acceleration is decreasing? Sugzj8u ;m rk6jepx1rx:4y2sed 0eyv:7 pport your04: ;j1egpjxmyz6yr2 e8du:x7e k vrs answer with an example.

  Suppose a can, after an initial kick, moves up along a smooth hill of id+ic gpus ;i-0ce. Make a statemenigis-+ ;c0dpu t concerning its acceleration.

  Under what condition is average velocity equal to the average of the object'ngh( bke cl40:s initn (cbg4el:0h kial and final velocity?

  Objects A and B both start at rest. They5klx xi9tk41)bkzy 6;y/wa eg both accelerate at the same rate. However, object A accelerates for twice the time as object B. What is the fiw 49a65lkykk 1xz t;g/x iby)enal speed of object A compared to that of object B?

  Objects A and B both start from rest. They both acceleru/3pogf -daf1y41 pigate 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 ofg3/ ppo u i1yf1f4-gda object B?

  When an object is released from rest and falls in the absence of frict8gjn 1*k o +rlqgt x-70kxp9ksion, which of the following is true concerning jqx1k 0kogr g9 87 k*l-xn+stpits motion?

  When an object is released from rest and falls in the absence of frictione4b dtd e,z:x9m5mu3 tz v,;or, which of the following is true conceb z5d:euo34 ,emtv9d;m,rz txrning its motion?

  Suppose a ball is thrown stjv sdz1jh1bj a7 /v)2traight up. Make a statement about the velocity and the acceleration when the ball reaches the highest /jbj tdav1)h72zsjv1point.

  Suppose a ball is throw 27l*yj r;cgsmn straight up. What is its acceleration just before it reaches its highest p2lc rg7s*;jmyoint?

  Suppose a ball is thrown straight up, reaches a maximum height, then falls to it; :w; zm*9o1agu:kxadzgb;f j7d5u ucs initial height. Make a statement aboutb:*zdg ;: ;;aum9cugj5dkax 1o7 fuwz the direction of the velocity and acceleration as the ball is going up.

  A ball is thrown straight up, reaches a maximum height, t s3r(ao*)(3 njumkepvf0+xl*7tole q hen falls to its initial height. Make a statement about t m r*0leqsoun( axl7j*ko3)tp ve+3f( he direction of the velocity and acceleration as the ball is coming down.

  Suppose a ball is thrown downward in the absence of air resistance. Magres(u 9o os67iy -mu/os6a(mke a statement concer/ums ooyre-a u(6(ois7 gm96sning its acceleration.

  Suppose a skydiver jumps from a high-flying plalf1uen1a2eaf9.kr2 unba.0 q ne. What is her acceleration when she sh feq22ale1ukann . bu.ar01 9fe reaches terminal velocity?

  A ball is thrown vertically upward with a speed v. An identiwdb zj-g 46 d5 t5o6dgq(g1mnvcal 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 th mojgg(b-qtdz54v 5dng6w6d1e first ball? (How many times higher does the second ball go than the first ball?)

  Ball A is dropped from the to+,ou jh5sizl.ezsa- 7p of a building. One second later, ball B is dropped from the same building. As time progresses, the distanazo,ss.z e7ijhu+- l5ce between them

  Ball A is dropped fromwp:dbq 5k;d)wkdw - zm 0i6:ny the top of a building. One second later, ball B is dropped from the same building. As time progresses, the difference ink pdd;iw qd:z5wk bm:y)w06-n their speeds

  Two objects are thrown from the tvqoldxtde8to t*1/tf ).4 yh :+a+dw top of a tall building. One is thrown up, and the other is th8t t:hwo/q+o+xtld)dt.a * y1t4f dverown down, both with the same initial speed. What are their speeds when they hit the street?

  A brick is dropped from tn e5z9w/*jkg she top of a building. A second brick is thrown straight down from the same building. Thegnzk95 *sewj/y are released at the same time. Neglect air resistance. Compare the accelerations of the two bricks.

  An object is moving with constant n +.rt1fegy0lhd -v5ik on-zero velocity in the +x axis. The position versui05+kg.-tef rd1h ylv s time graph of this object is

  An object is moving with constant non-zero acceleration in t,++g/tay* n;dvdzh ji xvbq go:x0j)j*-/ ekshe +x axis. The position versus time graph of this )*bjknqej;+ dgxx :/vaviyo,* jt+zds hg/-0object is

  An object is moving with constant non-zero velocity in the +j4 2lex *fo+n(h+ satox axis. The velocity versus time graph of this e hf*j+t xo4+2n(olasobject is

  An object is moving with constant nttfop5 1i7zk ,on-zero acceleration in the +x axis. The velocitoz 15t t7pkf,iy versus time graph of this object is

  The slope of a positiowo;msrv0po*,; ss 2g pv)ftr9n versus time graph gives

  The slope of a velocity vers;l4, fj(+8r (ppft x 4trhhylpus time graph gives

  The area under a curve in anwgwaocl dwz 0;i b 032ch:.cwia 2.ppif (3r-y acceleration versus time graph gives

  The area under a curve in a velocity versus time graphm a2,qxe ll1ur 517pdr gives

  If the position versus time graph of an object is a ho;8cvne5cwy c:un9jp4d*k,m j rizontal line, the object i9jkep4*c;5c n,dn vjc wm:u8y s

  If the position versus time graph of an object is a vertir++(f(v of ;2 aiulatgcal line, the object isvl;2fg++(rf ouat ai(

  If the velocity versus time graph of an objexayg 9 vn ow3+vaa3kg)),2amzct is a horizontal line, the object zwo a3a)kay) 92vmgv, + agnx3is

  If the velocity versus time graph of ancfp7 w.5*cyvnw91 u bmk9-z 9wnjsf7 b object is a straight line making an angle of 30 degf5s -y w1pv7zbj 7b fw99 nc*cm.wu9knrees with the time axis, the object is

  An object moves 15.0 m north and then 11.0 m south. Finq syp+;w2w t2h.ol4 pgd both the distance trave; 2w otqlpp+sy.h wg24led and the magnitude of the displacement vector.

  A boat can move at 30 .ui- , (ad y svbx80i,nm8rlxgkm/h in still water. How long will it take to move 12 km upstream in 0nm y.8rd,8a-( bxxiluv,gsia river flowing 6.0 km/h?

  55 mi/h is how many m/s? (1 mi db/q8jxa1s y,o 6)pzj= 1609 m)

  What must be your average speed in order to travel 350 km ydj8,c9vm 5casn 5m-vx1t 5ppin 5.15 h?

  A runner ran the marathon (approximately 42.0 km) in 2 hours and 57 msgs+zh05pw w8ez+ .y din. What is the average speed of the runnezg5w sd8y 0hspwez +.+r in m/s?

  A car travels 90 km/h. How long does it take for it to travee :kn(z) +e6salea6z ml 400 km?

  A ly (light year) is the distance that l082 dgskea2 nw0jc(j2h6chnn ight travels in one year. The speed of lightec aj2h0hnjk8sg2dw6c0 n ( n2 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 road :+q wz4s0u5 f a egk*jj1b0zvrand you look to the side for 4.0 s, how far do you trar+qa *z410fvu jjek:50 gsz wbvel during this inattentive period?

  If you run a complete loop around an outdoor 60 gd6p 3pf+uw)ilaq( b4whx;xhp z15sv6xkttrack (400 m), in 100 s, your average velow(w x+0s6hd 6qt5 igvxph4la3 ; k1fp bx6u)zpcity is

  A polar bear starts at the North Pole. 7x6)p fr t:ryuIt 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. Tt7x rup)6rfy: his 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, then 1.0 km /gp4 m/mum6nwh : hql9;1xohl east, then 1.0 km north, then 1.0 km west tm6h:1h/o pm/ n9lu lgxm; 4whqo 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; chmnw6;;mhr 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;6c wm rn;hmh; far is your hometown from school?

  A motorist travels 160 km at 80 km/h and 160 km at 100 km/h. What ivz/;ti phr13 nxs3da 9s the average speed of the 3p x;z dr/aht39 n1ivsmotorist for this trip?

  A motorist travels for 3.0 h at 80 km/h and 2.0 h at 100 km/h. What is her avermlb4g7r.s .6ows w-jw yztz:- age speed for the tripgrbtz7.w w :jzlo-4 m-w6y.s s?

  An airplane travels at 300 mi/h south for 2.00 h and then at 250 mi/h north for p 4ewd)ggb vgp+n55(h+ 4cczhh rx6/n750 miles. What is the average speedpphvne+dgz6 /4)c4g5hwgrn (c+ hb5x for the trip?

  In a 400-m relay race the anchor20)r2g6z aacyhe xlm 7ge w-7gb9tm n7man (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 comry2tze7 g7l)g60c b haw9e72x-nmg aver 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 uniforml 6,3gmo+wk59*4v :as mqjt8zvv7f sezf*vvs oy and comes to a stop after 8 s. The car's average velocity w,m:6s5 o*qvvvf sft3ek8 4m*9z+ szgjoa7v vduring deceleration was 62 km/h. What was the car's deceleration while slowing down?

  An airplane increases its speed from 100 m/s to 160 m/s, jqnw8srek87v7t9 ml9b i p:qte4b .b:at the average rate of 8 7e4nj:t7ilp 9 .brb:m 89 qsqebtvwk$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h accelerates at the ri2x2 i+xg ym7e3iw+eaate 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 accelerates8v+0y r, fm7bgg3 bzbg 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 upg lcsmen.f4w-z6* b;v with a constant acceleration of 64; fsbzwln.v-e*m cg $2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial velocity of 3.2 m/s experiences u hxq6t a90h7s,i ktl1a constant acceleration ot 9,70hxih1t q6alku sf $1.1 \; m/s^2$. What is the cart's displacement during the first 4.3 s of its motion?

  A bullet moving horizontally to the ri: n +t-o ;4.s9yxm1hyl8ciw2 ob irq1:hv awakght (+x direction) with a speed of 471 m/s strikes a sandbag and b;8ony2vlatxakiqi-c o9h4wy1r sh1 +: .:mw penetrates a distance of 31.48 cm. What is the average acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is launched fro+)v3f/ zy pwq72ddd epm a catapult on an aircraft carrier. It reaches a speed of 42 m/s at the end o fpv/ 3qpz2 dy)wd+e7df 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 c)ts-r+m rwaon,t : d:gonstant 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 9 oj.20yc oeiwof 200 m. What is its average accoyoe. c iw209jeleration?

  An object starts from rest and undergoes uniform accelerati llvh 6r(9c:iyon. During the first second it travels( 6lciyv9r:lh 8.3 m. How far will it travel during the third second?

  An object is moving in a straight line with constant accelew06o 6fd- s0eqgnnaugeil8pq ; /s:2y ration. Initially it is traveling at 16 m/s. Three seconds later it is traveling at i e2ldwn s0ya 6op/0-;eqn8:fs6 ggqu 10 m/s. How far does it move during this time?

  A car starts from rest gkcgiad 4 8,dct *s8b;and accelerates 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 decelerate at abqc1;mb6 s3cqwout $5.0 \; m/s^2$ 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 tbwmx gr 7qds;):qw att9 s2 4xt,fm4f3hat has been waiting at the intersecdg x34,w xm r7taf24qtqs bmfw9t):s;tion 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 s.x k 7rte9dnz0peed of 12 m/s on the surface of planet X where the acceleration due to gravtx d.re9n7z0kity is $1.5 \; m/s^2$. What is the maximum height reached by the object?

  An object is thrown upw 5fdj2y)c ;hxco11fbpr x1a.xard with a speed of 12 m/s on the surface of planet X where p).cbx;a 1oxfjxyfd1h 25r c1the acceleration 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 splv72l clwun- 4eed of 15 m/s on the surface of planet X where the accelerationl27 lv-c lwun4 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 za/iv*l iaq;/1u fb2z,r2hfc surface of planet X where the a1qia,/z ; ifh/l2a2r*b zcf vucceleration 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. Ix ah7r wi)j7:jf your friend holds a ruler between your fingers and releases it without warning, how far can you expect the ruler to fall before you cxi:77hjw ra) jatch it?

  A ball is thrown upward at a velocity of 19.6 m/s. What i-ml2punduj.z k* q04ds its velocity after 3.00mu*-dkpn 2jl qu.4dz0 s?

  A bullet shot straigh y0y(t 1-wz 4b5xabm6m:gkle rt up returns to its starting point in 8 s. What is the init axm5y-: wzgr0e1l 4m(b6 bkytial speed of the bullet?

  A ball is thrown straight up with a speed of 36.0 m/s. How long does1sk4xg 5c 2x-fp 2qegm it take to return to itscx1q- mkgg2 xf4sep5 2 starting point?

  A ball is thrown downward from the top of a building with an initial speekt);tr,econ4 hvbkn/ j4* h2od of 6 m/s. It strikes the ground after 1.e)n, to k4 tbr;njhkho 4vc*2/4 s. How high is the building?

  A ball is thrown straight up wimr+*z/uq .bc sqakg 8;th a speed of 30 m/s. (only fill in numerical value in the blankzs/ k8rbg*qmqac. ;+u s)
(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 strai29wu7dq-/z2qrh+ k vjwzg0,9arrqu h ght up into the air with a speed of 34.9 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 2 seconds later.  (数值)  $m/s$
(e.) Determine the time at which the ball pass a point 11 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 11.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what is the velocity at t = 1.04f9- t t04bmjqjzuf;t s?

  In Fig. below, what is the velocq6io8q 3 l brsz.k3n(vi*erv -9 fue)oity at t = 2.5 s?

  In Fig. below, what b85ym6hf da8qis the velocity at t = 4.0 s?

  In Fig. below, what is thec 3oukyw,2zd/ velocity at t = 5.5 s?

  In Fig. below, what is ta9 cvgl6yt6gyu* s:-z he average velocity from 0 to 4.0 s?

  In Fig. below, what is the avera 1ng,t8+s e-mnjdf* , xrz0sxoc:yg2i ge velocity from 0 to 6.0 s?

  In Fig. below, what is the acc : p75rcgprzg.eleration at 1.0 s?

  In Fig. below, what is6 .z kk6*3nark pxzqj* the acceleration at 3.0 s?

  In Fig. below, what is the average acceleration from 0 t5,hfjf;pj1cqd (rao,p 8hib 4o 5.0 s?

  In Fig. below, what is the average acceleration from 0:n 0zn(qhjeeusuo02+.6rg ah to 8.0 s?

  In Fig. below, what is the displacement from 0 to 8.0ea9s8 sc;f +.yhn/u-qwvtu-gbti /z+w h yy9+ s?

Does a car speedometer measure speed, vndi- 2 wf) 7k)qc oxm5,fm:qagelocity? {speed|velocity}

  An object can have a varying speed if its velocity is constas +r y:)p 4xd0em adcyesy 5j6bvw5.d7nt.

  The velocity of an objec hsl p5mbp:.ex 89ggswh5(.pr t can be negative when its acceleration is positive.

  If one object has a greater speed than lh9nv25 dy qvon)j,2h a second object, the first must have a greater ahh y2 oqn5njl,2) 9dvvcceleration.

  Two cars emerge side by side from a tunnel. Ca3x2h u; axa1cor 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 as its acceleratipzs/kfr v -fia-/6kh4on decreases.

  A baseball player hits a foul ball s*xi;qru :p1m-hrnut .ehh3*ptraight up into the air. It leaves the bat with a sphr;r:n p.xu1 i*h*htq 3upme- eed 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 acceleration, hotchj)oo5 *2 t9* o *4e9yjlgii:eycx zw does it change if airy*x yjoc49 h9oeg5j*i lto:* ztci2)e friction is ignored?

  As a freely falling object speeds up, what is 0-y:) wabkg5yto1qd3ze5lf o happening to its acceleration, how does it change if air friction CAN NOT be:- )z5k5yd goeaqlbfo0 31 wty ignored?

  An object that is thrown vertically upwardo9xqa*plpcq e3tc.9; 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 al x993.l;oct pe qpaqc*tered?

  An object can have ze0o43pkkm9gm4 )n w cuoro velocity and nonzero acceleration at the same time.

  An object can have nonzero velocity and zero acceleratiok6r r6hd9 y2hyn at the same time.

  An elevator moving from the seco3 srbc+g6 izo;nd floor to the fifth floor making no stops along the way hazr+3oic g; bs6s zero acceleration all the time.

  A rolling ball moves from a0, yh:6rackyhj tb-gt7q1 p: $x_1=1.9 \mathrm{~cm}$ to $x_2=-4.3 \mathrm{~cm}$ during the time from $t_1=2.5 \mathrm{~s}$ to $t_2=5.8 \mathrm{~s}$. What is its average velocity?  (数值)  $cm/s$ (only fill in numerical value please)

  A particle at $t_1=-3.5 \mathrm{~s}$ is at $x_1=2.2 \mathrm{~cm}$ and at $t_2=4.2 \mathrm{~s}$ is at $x_2=7.5 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complf68yx82c o qe vmh-o,aete laps around a quarter-mile ($1 \; mile = 1609 \; m$) track in a total time of 7.3 min. Calculate (a) the average speed  (数值)  $m/s$ and (b) the average velocity    $m/s$

  A horse canters away f,o .ijf rx l4sp)p(nd3rom its trainer in a straight line, moving 92 m away in 13.8 s. It then turns abruptly and gallops halfway back xdn, .jirlsp(3)4ofp 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 frlsewt.-2 wse 9om $13 \; m/s$ to $24 \; m/s$ in 5.0 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 fromx8; j*rwnx c7x $20 \; m/s$ to rest in a distance of 61 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reacr4he ogb.tu e*h, 3tz )ur4w,mh a speed of $26 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $2.4 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinter can burst out of the blocks to essentia .0ppp k-c8ckdlly top speed about .0pdckpckp8 - $11.0 \; m/s$ in the first 14.5 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 spe p tact g:p4,0kkrm7d3c,e(vj05kujded of $17 \; m/s$ to rest in 5.89 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. Ass ,.wguf8x 6mgb3/v hu up1z,sjuming a decelera pv, wxuuuh.3,f6jz8m bs1g/g tion of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck fcf01y8n0pzt 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 30.0 min. After exactlh:-8jx)lj qo dy 27.0 min, there are still 1100 m to go. The r-)xj8jl:o qhd unner must then accelerate at $0.20 \; m/s^2$ for how many seconds in order to achieve the desired time?    $s$