Suppose that an object travels from one point in space to anou:na4 n4othewo+i+j ) xyxs(4ther. Make a comparison between the displacement and the distance traveledh)i yn w4t+a(:nosx44x+ujo e.

  When is the average velocity of an o 3l93lz0texs object equal to the instantaneous velocity?

  A new car manufacturer advertises that their cargjvfe l1s9fz ax ,:upz1a4+ k- can go "from zero to sixty in 8 s". This is a description ofa-u x 94e+: ,k1jzavlff1zgps

  An object moving in the +x axis experiences an acceler: 44uco,p zeizf +.fh2*8uow bf7xnsoation of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to the East (+x direction)pt)qgaptdt 4bl- /6a , begins to slow down as it approaches a traffic light. Make a stabtg qa)d/4talp,t-6 ptement concerning its acceleration.

  Suppose that a car traveling to the Wesf6apmnllb,;5j(h him, ; n zw3t (-x direction) begins to slow down as it approaches a traffic light. Make a statement concerning its accelera;;fbm5w n3p6n,liaj(mh z h,l tion.

  Suppose that an object is moving with a constant.i j0gq j9qh h+yt8eo3 j-d:ui velocity. Make a statement concerning its hqe9qjyo tji03 u8+gh:ij.- d acceleration.

  If the velocity of an object is zero, does it meymzi mypvd ;r(y.ll3 j(a(s6 7an that the acceleration is zero? Suppoyi(yv s.my(; 6rl pd 37(jlmazrt your answer with an example.

  Can an object's velocity change direction when its acc lcl9f-0pqc0p/h btp2ff)t9deleration is constant? Support your answer)ct dl9pf0f0 2t9/ph-pqlfcb with an example.

  Suppose that an object is moving with constant acceleration. Make a st 3wru)ukd*i hbi/jp tq;u2e9 ;atement c/ we93iuqhrdbikupj; ;t2u *)oncerning its motion with respect to time.

  Can an object have increasing speed whg xrn5vhf2d9d 1n8 x*yile its acceleration is decreasing? Support your answer with an examply r5xh*218 nn fvdg9xde.

  Suppose a can, after an initial kick, moves up along a smooth hill of ice. Mar6vyi3n k//wurmi1 *lyaj1 (wke a statement conce/j raw uv 6ik/y1(i*w1nml 3yrrning its acceleration.

  Under what condition is average velocity equal to th z)(9i2jpm 9f9i*wh17 poqev,jgekx6y ld6j ae average of the object's initial and final velo f7e9p6ayz,mxg6id lei jqw2hkv(jo *1 9j p9)city?

  Objects A and B both start at rest n67bu5dkvsn2 . They both accelerate at the same rate. However, object A6kb dn 2uvs5n7 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 the sameb.x-io;rb,rxy rz6 * ,a(iqy c rate. However, object A accelerates for twice the time as object B. What is the distance traveled by object A com(ocxiy a,r*b6 ;,rrqxzy b-.i pared to that of object B?

  When an object is released from rest 9uz f f-xici4q)ohgd)(,uf ) t9ko w.wand falls in the absence of friction, which of the following is true cg)9fwci xo.(ud ) )zw,4 qf-u9fkhtoioncerning its motion?

  When an object is released from rest and falls in the absence of frictv3(uvh etzyy g+7h5g8ion, which of the follow3heyhty5(u g v zvg78+ing is true concerning its motion?

  Suppose a ball is thrown straight up. Make a statement abodlje, 6o kmi5b-rx ;*gut the velocity and the acceleration when the ball reaches the br jle ;5d* m6i,-okgxhighest point.

  Suppose a ball is thrown st qn7w8 a-fno1yraight up. What is its acceleration just before it reaches itsa7w8n -yq1nof highest point?

  Suppose a ball is thrown straight up, reaches a maximum heig iwexk kns6*(r (/qlshc.)1vw ht, then falls to its initial height. Make a statement about the direction of the velocity and accelern* i(re xwqv sh )k(lsc1.w/k6ation as the ball is going up.

  A ball is thrown stra 6zq(95 om,df vvl0b rvgmmc33ight up, reaches a maximum height, then falls to its initial height. Make a statement about the direction of the velmdgv f 9 zrcml6qv3(0 obv53m,ocity and acceleration as the ball is coming down.

  Suppose a ball is thrown downward in the absence of air resistance.((;7o.dbqrl sqhvj aei . sm:9 Make a statement coslmrho(.v;b q i:9.sa7(d jeqncerning its acceleration.

  Suppose a skydiver jumps from a high-flying plane. What is her +kddu( pt2(jgacceleration when she she reaches terminal ve(+tp d(2duk gjlocity?

  A ball is thrown verticall -p s;zk2h-srf(kjjw)y upward with a speed v. An identical second ball is thrown sj(p hsj;)f-w2k-z rk 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 the first ball?)

  Ball A is dropped from the top of a building. One second later, ball Bkwa((l,pic /f q;.h obkffv: u:u2d z) is dropped from the sa;d ./fb)cuo,(vpwk(:i f uq2 khaz:flme building. As time progresses, the distance between them

  Ball A is dropped from the top of a building. One second later, re rc(scm82 tdes1y3rk 9;vm3 ball B is dropped from the same bu cscyvtr8 1 kee2msm(33 rr9;dilding. As time progresses, the difference in their speeds

  Two objects are thrown from the top of a tall x1ibb:9od gwh 1ikv-)building. One is thrown up, and the other is thrown down, both with the same initial speed. What are their speeds when b9d-w1i k:)ob gi1vhx they hit the street?

  A brick is dropped from the top of a building. A second brick is thrown 1f5 7a:bihwcoht)rfg (s7 j/ustraight down from the same building. They are released at the same time. Neglect air rfw:5c s)17 (bit7 jharfoh/ guesistance. Compare the accelerations of the two bricks.

  An object is moving with constant non-zero velocity in the +x axis. The positaoagcxx(.ztvu 4a 9:- ion c x9a( ua4gz x-.to:avversus time graph of this object is

  An object is moving with constant lvic j940)kwanon-zero acceleration in the +x axis. The position vers4 j)kciwvla09us time graph of this object is

  An object is moving with constant non-zero velocity in theb( /frzvo)p4q28msloyr 9j.c +x axis. The velocity versus time graph oo8pol js )vbr(mf/294rcq.z y f this object is

  An object is moving with constant non-zero acceleration in the +xwtly(q l+x(8l sk0tktb(k3.c axis. The velocity versus ti(b8 xq( k+sl l(cl0t.kytwt3kme graph of this object is

  The slope of a position vx)1 5hyl lnp:zo70bff ersus time graph gives

  The slope of a velocity versus time grapdfs:9ojhaq 7jd,3 :i swhe17 ph gives

  The area under a curve in an acceleration versus time g w3 led;7c pbgb13vt1qraph gives

  The area under a curve in a velocity versus time graph g2zrwptg ,85vl ives

  If the position versus time graph of an object is0s zae)hw q4c( a horizontal line, the object ishzces(4 q)0aw

  If the position versus tig(c 1ezto urq:) k6t0kduh4 j+me graph of an object is a vertical line, the object iskqr +kdu 4)10zgecojth t(:6u

  If the velocity versus time graph of an object is a horizontal lin9p /uc6 a+9jorwtc pmkp+1t+ce, the object r/pc9oc1k9t6 + awtc+ujm +ppis

  If the velocity versusom+ipc* ibybds 38qa+tc;o/ 5 time graph of an object is a straight line making an angle of 30 degrees with the time axis, the objbiycd+q3*p5 am ;+ 8b istcoo/ect is

  An object moves 15.0 m north and then 11.0 m south. Find both the di,va-n)e k,+c(2e;, gq*pxe awqmxerw stance traveled and the magnitude of the displacemee ;2ken+xa,ra qe-(xg w ),ewvcpm,* qnt vector.

  A boat can move at 30 km/h in ss u8krby(xt)- +pkylfcld3d g,7+n.ktill water. How long will it take to move 12 km u.dck+sd pg8 x7y,fbku3yrn k+ l)t (l-pstream in a river flowing 6.0 km/h?

  55 mi/h is how many mhkkv:u;*: tu 6lc59c; igcq ym/s? (1 mi = 1609 m)

  What must be your average speed in order t:tcwr e 7can/ ,59yvolql5) 9fb0gwm to travel 350 km in 5.15 h?

  A runner ran the marathon (approximately 42.07 dl-3zc ztc,i km) in 2 hours and 57 min. What is the average speed of the 3 dzc7zilct, -runner in m/s?

  A car travels 90 km/h. How long does it take for it to if4/i*1wi rj ptravel 400 km?

  A ly (light year) is the distance that light xdp6+.qf ndxs 0ld0;k travels in one year. The speed of ligfq d+ ;0dln0pxdk.x6 sht 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 and you look to the side +toi co6n mc);for 4.0 s, how far do +omt6c)nio c; you travel during this inattentive period?

  If you run a complete loop k6rzj *qfpf nv. c0o;,d7;tfparound an outdoor track (400 m), in 100 s, your average velocity dtv*;f0p jnpf.7,k 6oqzcf ;r is

  A polar bear starts dx+i0t zoq(/ 8cg7:aq : .hxlmkyij9kat the North Pole. 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 averag8xc+0my/adt.qklqg jzi:kx7o (: h9ie speed?

  A polar bear starts at the North Pole. It travels 1.0 km south, then 1px*y b3s9ljg )p5z .bc.0 km east, then 1.0 km north, then 1.0 km west to return to its starting point. This trip gbxs5.b3p cp)z*9 ylj 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 mighe o- :4d7a:0w gtgxr/d39bjwcx4j yles. It then startj/gexjg:4xah7g9 -w 4bwd t odyc:0r3s to snow and 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 , opcm+fk pl9*km at 80 km/h and 160 km at 100 km/h. What is the average speed of the motorist for this, pc+f* m9lkop trip?

  A motorist travels for 3.0 h av lofcwu+b9mtl3y)k4fi m08/ t 80 km/h and 2.0 h at 100 km/h. What is her average 8fblumk+9fo )ctv 3mlyi0w/4speed for the trip?

  An airplane travels at 300 mi/h south for 2.00 h and then at 250 mi/,de1/p/a1tq zv,gozkv iv i /1h north for 750 miles. What is the averavv1apd/kz1g q,vt 1,o i/iez/ ge speed for the trip?

  In a 400-m relay race the anchorman (the person who runs the last 100 m) for -i6jp:3-xae8h e htaphg3zd 7 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 runtgj:a-ih7h8 p e 336dzhp e-xaner not lose the race?

  A car decelerates uniformly an2o-kri6cy.:w w br p/wd comes to a stop after 10 s. The car's average velocity during deceleration was 36 km/h. What was the cac6ww.rr-bo:p2 wyik /r's deceleration while slowing down?

  An airplane increases its speed from 100 m/s to 160 m/s, at the xxz3el.:;,m vrt); kn ./ xvhten0uujaverage rate of 3jxu le.zvrh:0u;,nxv/t)xkem n t .; $15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h aci0*8qjv 0hle -eq5 hlycelerates 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 re ;qi/i) edb3( 4dbjh4ffkg am+ jl*q5zst and 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 speeds up with a cojvl3.j6y7gejd 7 hp k;s,af) znstant acceleratio7 yh.jsjpdl ke6v,jg )7z af;3n 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 7.6 m/s experiences a constant acceleration ljatg d pt7 )4yn04cm(myvm9/of tlty md/gavmn9 cj y7pm4(0 4)$1.4 \; m/s^2$. What is the cart's displacement during the first 7.0 s of its motion?

  A bullet moving horizontally to the right (+x dir-3wru/mbyg q2is *fq)ection) with a speed of 562 m/s strikes a sandbag and penetrates a distance of 43.29 cm. What is the average accelerationqibq)y mug- 3/f2sw *r, in $m/s^2$, of the bullet?

  A jet fighter plane is launched from a catapult on an aircraft car1q at 8q6/f sgugzk,u5rier. It reaches a speed of 42 m/s at the end of the catapult, and this requires 2.0 s. Assuming the accek qz6 u1sqga 8f/g,5utleration is constant, what is the length of the catapult?

  A car starting from rest r.0fadte 2 s)7s8pwh omoves 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 distance of 200 rukfiz*2f*q8 m. What is its average acceleratioqf r*ifkz28u*n?

  An object starts from rest and undergkh98hc;l d/ pi2j7hefu4nlu4oes uniform acceleration. During the first sec4ul2cinhdlh e4 /j7uk;8 9pfhond it travels 3.4 m. How far will it travel during the third second?

  An object is moving in a straight liflb74fucu+1 qr.a /d rne with constant acceleration. Initially it is traveling at 16 m/s. Three seconds later it is travelin1rqu/fr.l7adf4u +bcg at 10 m/s. How far does it move during this time?

  A car starts from rest and accelw 4g56dhdttp 1q3u k3sz0ddv l- bm7m:fw39 nqerates 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 about u u.fo0vmqtvy9 ws: /,$5.0 \; m/s^2$ 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 afiktu4p)e:y ( d-lq)xg 57nc zt the intersection starts ahead with a7fdzx5t ))-(pckygeiul :n4q 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 of 12 m/s on the surface of planet X whq:)sh,aai*6y ghk8y q ere the ac)6y,qy *a gaskqhi:8 hceleration 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:067glnsb u vw() mtmhn3nf9e/s on the surface of planet X whereu3s6l90et (w7vm n hgnf)nb:m the 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 scf q j3l( e-.bz;a*h*yrj6icy peed of 15 m/s on the surface of planet X whey* cc y-f;6hq*j . 3abjr(lzeire the acceleration 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 planet7 depxq7 c2 hb1pej;d, X where the acc;7ceh1p qp,jx7 dbe2deleration 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 thani8e7i(wsv-n pt ( -p8pks5urku5vv *q 0.10 s. If your friend holds a ruler between your fingers and releases it without warning, how far can you expect the rultsv w iq788vu pe5v-k i-upn5kp rs*((er to fall before you catch it?

  A ball is thrown upward as lxfw;1 z, + zay:w,bjwbchvq4(dz*,t a velocity of 19.6 m/s. What is its velocity after 3.00fv ,sdh b+wjay(l,zz*4:wz,1xqwbc ; s?

  A bullet shot straight up rz kz1mni 4 ui6c9um,d8eturns to its starting point in 16 s. What is the initial speed of the bull 8zd c9,1 mukzmni46uiet?

  A ball is thrown straight up with a speed of 3hcksn5 0d6 qu2;y7r0wyyoze 26.0 m/s. How long does it take to return to its starting 5qd2h ny s02 c6 koywy7eu;r0zpoint?

  A ball is thrown dowxk gwf06gl m d6z6b,;onward from the top of a building with an initial speed of 11 m/s. It strikes the ground after 2.5 s. kb6 06 g,o zdml6wg;xfHow high is the building?

  A ball is thrown str3 ji7 u/gx6ye ze0gk( gx0;augaight up with a speed of 30 m/s. (only fill in numerical value in the 0u;igk0 agu gy(xjx3e/67gze blanks)
(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 8 7esi4q8kc 6ze 8h5gbr1nzk4og mj .sinto the air with a speed of 45.2 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 8 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 8.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what is the velonp j5azb4cv5, city at t = 1.0 s?

  In Fig. below, what is the vbxd-c4x /*vnwp -0w0p zf0dgzelocity at t = 2.5 s?

  In Fig. below, what is the velocity at n, ta710pc-ew mrw/ ntt = 4.0 s?

  In Fig. below, what is the veloci 0ij,ohdwf7e 5ty at t = 5.5 s?

  In Fig. below, what is the average velkwlgvz2n dn g +;knne- +(9h3tocity from 0 to 4.0 s?

  In Fig. below, what is the average velocity from 0 to 6.0 xlj t02ki0tfs y/7 +xzs?

  In Fig. below, what is the acceleration at 1.0 s3b/ubxsr p;em d2k9d(c nv( e*?

  In Fig. below, what is the acceleration at 3sz 6,2ip:ay up 2sm-pc.0 s?

  In Fig. below, what is the average acceleration fromazrt8bohu5 (. 0 to 5.0 s?

  In Fig. below, what is the average acceleration from 0 x/;0-vhoirap to 8.0 s?

  In Fig. below, what is the displacement from 0 to 8.0 s?yvc ro i6a7 kdc91 irp/7k3gg6

Does a car speedometer measure speed, vd) rg k01 ffds*+4fmsuelocity? {speed|velocity}

  An object can have a varying speed if its velr y )ffqe1, v1 xfbhy- n-gf(qhm8u*p6ocity is constant.

  The velocity of an object canr3cd uwfs*)g8e ua6/i 9dd,a m be negative when its acceleration is positive.

  If one object has a greater speed than a second *9qg)lt p7aglobject, the first must have a greater accelegl at9*gl 7p)qration.

  Two cars emerge side by side from a tunnel. Car A is traveling with a speed of v 28qirm geit p,66yg9$60 \; km/h$ 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 bb1rc/ 9mwe 78ow 3y35t uw)uvnt/g vtacceleration decreases.

  A baseball player hits av, qfv9ul:; dl foul ball straight up into the air. It leaves the bat with a speed lv9d, v:;u qlfof $120 \; km/h$. 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 spj *0ch(0 emc+plwz 1v.ybqt a5eeds up, what is happening to its acceleration, how does it change if air frict+0ymq jlpcc.b(vw h51az*te 0ion is ignored?

  As a freely falling object speeds up, what is happening to its acceleratw3mfc s)5ru-;sxn76fhq 2 g dvion, how does it change if air friction CAN NOT be 7rvm ;qdg3 hf)-5 uwn6c fss2xignored?

  An object that is thrje nac7- 5g:qjown vertically upward will return to its original position with the sam-jn7:aj egcq 5e speed as it had initially if air resistance is negligible. If air resistance is appreciable, how will this result be altered?

  An object can have zeu cmezj2e( u3 n*5ie1bro velocity and nonzero acceleration at the same time.

  An object can have nonzero velocity and zero acceleration at the same5-,x-ani xm+ ib y9wam time.

  An elevator moving from the second floor to the fifth flhlr3ffa;25wbh5 5 aptoor making no stops along tarpt2a l5bh3w hf f55;he way has zero acceleration all the time.

  A rolling ball moveskm2ek :c, 8q tv.0ce .0zc d .i,-pnwnffpuo)i from $x_1=2.9 \mathrm{~cm}$ to $x_2=-4.3 \mathrm{~cm}$ during the time from $t_1=1.6 \mathrm{~s}$ to $t_2=5.5 \mathrm{~s}$. What is its average velocity?  (数值)  $cm/s$ (only fill in numerical value please)

  A particle at $t_1=-3.8 \mathrm{~s}$ is at $x_1=2.5 \mathrm{~cm}$ and at $t_2=3.9 \mathrm{~s}$ is at $x_2=8.1 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete laps around fe-d5hbsav5- a quarter-mile ($1 \; mile = 1609 \; m$) track in a total time of 10.7 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 )mk3rd5 clsp.z7y+ux 108 m away in 9. 73lzxd. )kmr ypu+c5s5 s. It then turns abruptly and gallops halfway back in 4.7 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 v;juva.j; lc: 3n7mvr3+y z ek$11 \; m/s$ to $24 \; m/s$ in 5.5 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 frommm;fvdod1dghr / c1 6/ $20 \; m/s$ to rest in a distance of 65 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reachye5wa rabvc-. :8 j4hi a speed of $29 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $2.6 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinter can burst oum: z p1iy7f3vst of the blocks to essentially top speed about7z3 i:pms 1vfy $11.2 \; m/s$ in the first 11.5 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 speed ol vs9ztkyv6.;.jl: b 2q .jhjh9q( aye ct*+yjf $15 \; m/s$ to rest in 5.67 s. How far did it travel in that time?  (数值)  $m$

  In coming to a stop, a car leaves skid sfwuxfmapy/8 ,22 y4 m3ff)ect 3z:mwmarks 92 m long on the highway. Assuming a de f4z,2t:s/2m uxyaf3 8pyfwwfm 3ec)mceleration of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck goingea;2 upp7iuokvli9;4mva82luak5 u3v 52 dk x $25 \; m/s$ 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 w/z9 e xtevc70than 30.0 min. After exactly 27.0 m/xevtewz0c 79 in, there are still 1100 m to go. The runner must then accelerate at $0.20 \; m/s^2$ for how many seconds in order to achieve the desired time?    $s$