Suppose that an object travels from one point in space to a5ncg1zh(eq s;nother. Make a comparison bet1h( n sqcg;e5zween the displacement and the distance traveled.

  When is the average velocity of anwr: g*sl,0lfu;7 tmva)+wafu object equal to the instantaneous velocity?

  A new car manufacturer advertises that their car can go "from zero k+ozqrcrp3.pap 6z f(a+0yt, to sixty in 8 s". This is a descraz ayppktqpr3(z.fr 0co ,6++iption of

  An object moving in the uyuod.n- am :0ge d:r tv1f*,9jqj yc8+x axis experiences an acceleration of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to the East (+x direction) begins to slow e) g wjvurtbsf 5dv0p9w/:/o.down as it approaches a traffic light.9 5gj/ o dpseuwr.f)0:b vt/vw Make a statement concerning its acceleration.

  Suppose that a car traveling to the West (-x direction) begins to s0k9w2o;-jfbew pz; y .:wwaomlow down as it approaches a traffic light. Makew0;z wypoe: j2wo- .awfb;9 km a statement concerning its acceleration.

  Suppose that an object is moving with a constant velocity. Make a statazi3oq6k u ob, d:fno;bm6 7j.ement conc7 od q6j.ua i:mn,6;b3zkofbo erning its acceleration.

  If the velocity of an object is zero, does it mean that the awc i17-w3vu lud1 uk8xe52yoocceleration is zero?13 wdxu1 l ku8 o-i2wvc7y5euo Support your answer with an example.

  Can an object's veloc9cek07 eo 1-lc):i*anehagnd *6ele rity change direction when its acceleration is constant? Support your answer wi0 e:aice le**ga- dne 9elr6cnk h)o17th an example.

  Suppose that an object is moving with constant acceleration. Make a sti et h+ 1cawzp64;e/uhatement concerning its motion with respect to i4 e 6u/pczth; ewh1a+time.

  Can an object have increasing speed whiqa f)d5dfa,4qv(s5q c).q9xlswy5l ele its acceleration is decreasing? Support your answer qf5s sx l 4,q cq.f)55w)aeaydv9l(dq with an example.

  Suppose a can, after an initial kick, moves upubri yhe2g(ti4ht,. p1y. nu6 along a smooth hill of ice. Make a statement concerning its accelerub 14.t p2ie6.n( iyruh,ytghation.

  Under what condition is average velocity equal to the avixvbm57 r w4:eerage of the object's initial and fii ebvw: m5rx74nal velocity?

  Objects A and B both start at rest. They both accelerate at the same rateh2p w86lj+fpgxm w2 mk.,q0f u. However, object A accelerates for t0j+hfmw umgk6 x, .8qp2p lf2wwice 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 accelerated)gjwj:g 8gh xk7h1kc 5 6ff1f at the same rate. However, object A accelerates for twice the time as object B. What is the distance 1x jhkwjck f)fd7gfg 86hg1: 5traveled by object A compared to that of object B?

  When an object is released from rest and falvbs4 :5zu1. ataa+efils in the absence of friction, which of the following is true concerning its motioai:1bz45eafs+. u vta n?

  When an object is released from rest and falls in the absence of friction, whih4z6rvbu.n u0vzw)n w 15ff0*u xbo f7ch of the following is true concerning if7u1w*ubz0wrnvohv f 0 z. x)5n4u6bfts motion?

  Suppose a ball is thrown straight up. Make a statement 9s;7o-mr)djc:pcu m eabout the velocity and the acc ; )7epcodj-:9muscrmeleration when the ball reaches the highest point.

  Suppose a ball is thrown straihlf*c-f, 4vok idij zd1o* *h/ght up. What is its acceleration just before it reac4dfo z*dj*k-i1,fi l*/vo hhches its highest point?

  Suppose a ball is thrown straight up, reaches a maximum height, then kef4sq7see0 0falls to its initial height. Make a statement about the direction of the velocity and acceleration as tq7 s04eskefe0he ball is going up.

  A ball is thrown straight up, reaches a m ea8ro:p+5b4.qq esxe aximum height, then falls to its initial height. Make a statement about the direction of the velocity and acceleration as the ball is coming do qe+s8:ob.q eaxp5re4wn.

  Suppose a ball is thrown downward in the absence of air r8n l+4qh,i a5sufsl/mar j+ )hesistance. Make a statement concerning its acjmq)lsih uh4 /5a+s r 8+alnf,celeration.

  Suppose a skydiver jumps from a h h)/zukd-dg;zigh-flying plane. What is her acceleration when she she reaches terminal zzu;hd)/-kd g velocity?

  A ball is thrown vertip1ardox2 z,j;lxx 1: hcally upward with a speed v. An 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 tdr 1za2h1j,x;p xl :xohe first ball? (How many times higher does the second ball go than the first ball?)

  Ball A is dropped from the top of a buildin1ba)qk q+tt) hn2vjg-g. One second later, ball B is dropped from the same building. As gah)t+n2v btkq)1jq- time progresses, the distance between them

  Ball A is dropped from the top of a buiv x uu5a slqg+6v9,xmo iw:8fle/6; tvlding. One second later, ball B is dropped from the same building. As time progresses, the di/v9ox valm8eigt5ux, ql +v;w 6us6:ffference in their speeds

  Two objects are thrown from the top of a tall building. One is thrown up, /.sj ebl3k9muand the other is thrown down, both wb9k.u/ls 3j emith the same initial speed. What are their speeds when they hit the street?

  A brick is dropped from the top of a building. A secon1.q ep yl. hh3hf-lj*y yh6c:gd brick is thrown straight down from the same building. They are released at the same time. Neglect air resistance. Compare theh.f -hyhhyl*6pg1 c:eql .3 jy accelerations of the two bricks.

  An object is moving with const ahp +apfao0;of oz(,/ant non-zero velocity in the +x axis. The position versus tip oopfa o0+zf /;(aha,me graph of this object is

  An object is moving with constant non-zero acceleration in the +x axis. Thex,* ilzphc)nzwy4 ;zkh :,t7m position versus time graph of this obczpthxy7m;zlh w:,4n)zik*,ject is

  An object is moving with constant non-ze (f0t:pl 8y .qaye wu8+b9brgoro velocity in the +x axis. The velocity versus time graph of t b(yf88 a0:yl+u.ge 9po wtbqrhis object is

  An object is moving with constant non-zero accelerli)s3ye n4r/15xkof(jbklodgv s -9*ation in the +x axis. The velocity - *sg(koxk v3y /e9dslli5b r of4n)1jversus time graph of this object is

  The slope of a position versuundd vz2ku 3k:ny8b3)ab/ e- ds time graph gives

  The slope of a velocity versus time grama)j wc/ea2v0)php +cph gives

  The area under a curve in an acceleration versus tim 3,7m,keib9m;sgg bdfzmponu 529qg;e graph gives

  The area under a curve in a velocity 8na ez. r3(ldyversus time graph gives

  If the position versus time graph of an object is a horizontal line, the objesgq o8i4umwr y8yp(wh1,*z:c ct s 8mc,iwp*8w q4:uy (zh1yogris

  If the position versus time graph of an object is a veae 1 fhl3lu7a/rtical line, the object isa/ e 7lluh3f1a

  If the velocity versus time graph of an object is a horizontalm1bq.0 dt b cs32e0mcxwol9ug( ,su.i line, the object ig.ebs du,( su91qc b 00m3o2l citxwm.s

  If the velocity versus time graph of an object is a straight li8bwsujkr vw0u + 4p:9qne making an angle of 30 degv9jprwu :8k4sb wu+q0rees with the time axis, the object is

  An object moves 15.0 m north andtb. 0mu n ;-rca/xx:ei then 11.0 m south. Find both the distance traveled and the magnitude of the displacement vectori :x; m au.erx/n-t0cb.

  A boat can move at 30 km/h in still water. How long will it takegc(gznni6f e+x06 bqtb)y9 u2 to move 12 km upstreamg6bq 0fb ne i6+ 2z)gt(yxuc9n in a river flowing 6.0 km/h?

  55 mi/h is how many m/s? (1 mi = 1609 mk xy2-t 3f5n 0tnlrgg4)

  What must be your average speed in t218 b 9awqqsfnwoz-;b:le p:order to travel 350 km in 5.15 h?

  A runner ran the marathon (ap7q13p d tz6ji pmt(xrp7i gl.pk .9s:eproximately 42.0 km) in 2 hours and 57 min. What is the average speed of pil91 km.r7p:p.zpe67 s(tgj tdx qi3 the runner in m/s?

  A car travels 90 km/h. 8qfq9*qz8 jqu How long does it take for it to travel 400 km?

  A ly (light year) is the distance that light travels in one year. The gindb 1x 148 6 7fp(zzxwk0upqspeed of lig 71kpgfpz i w(nq6zx1u048xb dht 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 for vn-;r* c+ a umo c(dbzbl0s1t54.0 s, how far do 50dmluz*n tbboc;(c-a +svr1 you travel during this inattentive period?

  If you run a complete loop around an outdoor track (400;o/ evy.ngf :vm,,cro m), in 100 s, your average velocity igo.fy ; vnc:r,/o,evms

  A polar bear starts at the North Pole. It travels 1.0 km south, then: q/zvw.i:4eo j0 ugrj 1.0 km east, then 1.0 km nortv.: 4w:qzo0igu jr/je h, 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. It travels 1.0 km south, then 1.0 k, i8yxqf+td:nfc 8vs 8u-nqx7m east, then 1vq8x8 nfunc+:t f x-qd8i7y,s .0 km north, then 1.0 km west to return to its starting point. This trip takes 45 min. What was the bear's average velocity?

  You are driving home on a weekend from school at 55 mi/;x+nl u1vwiy/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 yx+nu1;/ lvwiy our hometown from school?

  A motorist travels 160 km at 80 km/h and 160 km at 100 km/h. What is the avd ukz 4z1j3+h)ylyub-erage speed of the motorist fz+d)u1 zyb3jh y4 -uklor this trip?

  A motorist travels for 3.0 h at 80 kcw7u:q cea.znrtsu34;kl byc h hl2lc7(s0 75 m/h and 2.0 h at 100 km/h. What is her average speed for the tthelh0:lc5cuul3 bkc q77r;yz 7s casw 42.n(rip?

  An airplane travels at 300 mi/h south for 2.00 h and then at 250 mi/h north fo4 kf )uli(izm*; vkta*r 750 miles. What is the average speed for thfm**)tlvz i4 iau (kk;e trip?

  In a 400-m relay race the anchorman (the person who runs 1bn xruj+ov;2;tul p: the last 100 m) for team A can run 100 m i l;vpxru; 2+:1ntbjo un 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 the race?

  A car decelerates uniformly and comes to a stop eo;0 9 oo:sr3a8fvrmwafter 11 s. The car's average velocity during deceleration was 57 km/h.er0 o8oa3 rs:w;9mof v What was the car's deceleration while slowing down?

  An airplane increases its speed from 100 m/s to 160 m/s, at the average l. i03zo;ioe urate of i eoul;3z 0oi.$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 k iqh9 jpwm,yz(b8a4 ,fm/h accelerates 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 aezl1) 7*+ ohxqb eb*i qn fn4zh2pw2,p; )xwjit $4.0 \; m/s^2$ 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 ukt s2w1+ 0msyfp with a constant acceleration+s2f twk10 mys 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 7.7 m/s exui-gr3cvq 9 n2periences a constant acceleration ofi -gc39qrnvu 2 $3.1 \; m/s^2$. What is the cart's displacement during the first 5.0 s of its motion?

  A bullet moving horizontally to ,ax,a ej c9s0wzly3 *fthe right (+x direction) with a speed of 326 m/s strikes a sandbala,3*c 9jfesa wyz0 x,g and penetrates a distance of 43.77 cm. What is the average acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is launched from a catapult3r)a9 k,*yuvt de m*u 97rh1hkp fsjq9 on an aircraft carrier. It reaches a speed of 42 m/s at the end of the ut rpd q97a1u e *rkhv),f9my39jhsk*catapult, and this requires 2.0 s. Assuming the acceleration is constant, what is the length of the catapult?

  A car starting from rest moves with constant accelerag4 4wuk 9 5l 5cbayoqehm3//getion 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/yv17 ej+ st5zys to 80 m/s in a distance of 200 m. What is its average accel5s+ vjy7y1te zeration?

  An object starts from 6 lihml3h+ysu/r:xsug 6ca;e ++l4jk rest and undergoes uniform acceleration. During the first second it travels 3.5 m. How far will it travel during the third seconjy ur lh/6:li has lx++mu;g6+cs k3e4d?

  An object is moving in a straight line with constant acceleration. Initia8tfujs7cifeorv v4x/2-jg, k 1p3w v* lly it is traveling at 16 m/s. Three seconds later it is traveling at 10 m/s. How far does it move during thf7 i-vtj1,pw8v3 gvfkjsxco/ *re 4u2is time?

  A car starts from rest and accelerates wqbl) vv d498 1ib5cgwuniformly 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 abous37 f5npbrz dp(8s 1gnmelc .;t $5.0 \; m/s^2$ 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 ch5udfoc,d 2z3tb(ql-p+ ; f*izdz6 ethat has been waiting at the intersection starts ahead with a con;dzz,fcbfolcez-5p*q 6h2d uid3 (t+stant 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 planetb d;up3pn o3 )jc6pfkar2hno)z7-/it X where the acceleration due)f /t nokj2zp3p)3can-;p76oidbr u h 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/s on the surface of plandkb*ly4pkrt++5 , sjc et X where thej sr*, k5cpytd4k +l+b 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 speed of 15 m/s on the surface of planet X wq-:b 3s eo )jt9/bx6uidi rh8ahere the acceleration d -h der98ix:)/utqojab 36ibsue 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 osmt/z*ov0 rv8)sxlcz kr 49*af 14 m/s on the surface of planet X where)*azz0xcsovms94 r*k/lt r8v the acceleration due to gravity is $3.5 \; m/s^2$. What is the speed of the object after 8.0 s?

  Human reaction time +l0g ,qvo.el 2aw frrvz-2cl:is usually greater than 0.10 s. If your friend holds a ruler between your fingers and releases it without warning, how fafl+lw q v0rcev.2 al:g2,r-ozr can you expect the ruler to fall before you catch it?

  A ball is thrown upward at a velocity of 19.6 m/vpese m/8q/8v kg e(;(ivi:qn9qzk r/s. What is its velocity after 3.00 s(/q ki; 8qs8i ee/grv:mnz(/vqk pve9?

  A bullet shot straight up returns to its starting point in 7 s. What is the(iz+7o6q2y ny d* magv initial speed of the bullet? d6vn+2z *gmayqoiy7 (

  A ball is thrown straight up with a spefr;b6n, hz yzs:)6 ehqed of 36.0 m/s. How long does it take to return to its starting pze:y6 hqs ,)bz;nh6fr oint?

  A ball is thrown downward from the top of a building with an initial speed6y fvgom7lz/o 3sic73 of 28 m/s. It strikes the groundcyz3vgifl37o / 6som 7 after 4.8 s. How high is the building?

  A ball is thrown straight up with a speed of 30 m/s. (only fill in numep sdy;2zwhu c x698p- azra5xrm2-7sirical value in the bliyp8sdxw z- u659z;2crms7xh 2ara p -anks)
(a.) How long does it take the ball to reach the maximum height?    $s$
(b.) What is the maximum height reached by the ball?    $m$
(c.) What is its speed after 4.2 s?    $m/s$

  A foul ball is hit straight up into the air weh/;+z r xy/ccty1q w:ith a speed of 31.2 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 2 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 the velocity 3ua/nvp dr (j/e l.tr2jrj7p(s,9itu at t = 1.0 s?

  In Fig. below, what is the velocityrat-4e*sm 6da at t = 2.5 s?

  In Fig. below, what is the vo8z -1mv v pr2wivr;+selocity at t = 4.0 s?

  In Fig. below, what is the velocity at tn8u *)ldkfo -dqrzk72 t50j sb = 5.5 s?

  In Fig. below, what is the average velocity from 0 to 4.dkx6ug4 7;u ps0 s?

  In Fig. below, what is the average velocity from 0(t3 3p + h)kosk96x ,dtwtetoy to 6.0 s?

  In Fig. below, what is the accelerxlhqtmem 8fd,29el3 u 7f4;guw q;.bk ation at 1.0 s?

  In Fig. below, what is the acce vzgh-dipsyx p4a:hi9c n//8ms8 z7z;leration at 3.0 s?

  In Fig. below, what is the aver:f wm dozsi5:2age acceleration from 0 to 5.0 s?

  In Fig. below, what is the average acceleration fr9jlrwef 9ftn6 5sih(-(po3d8 i e jy,com 0 to 8.0 s?

  In Fig. below, what is the displacement from 0 to 8a6yrax 7vfr5.o,sz6 f.0 s?

Does a car speedometer measure speed, velqyj-u7 qa u61pocity? {speed|velocity}

  An object can have a6:re* pe7gkoa e5e ty2 varying speed if its velocity is constant.

  The velocity of an object can be negativera g)a,s1 vhn7 when its acceleration is positive.

  If one object has a greater speed than a second object, the first ,-jlr he7nycz )1ej :gmust have a greae:ry ),j eglc jz-7h1nter acceleration.

  Two cars emerge side by side from a tunnel. Czk qcre+(j;8ki zi/ n*rd-5ll ar 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 acceleration decrbw;3yj m/llz3d,v5qq3 k v2weeases.

  A baseball player hits a foul ball straight up into the air. It leaves the bat wxmdy: hnqd sb0 6+e/t d:f+0ikithydh eb0q:n0d+k fi/t:s d+x6m a speed of $120 \; km/h$. In the absence of air resistance, how fast will the ball be traveling when the catcher catches it?    $km/h$ (please only fill in numerical value in the blank)

  As a freely falling object speeds up oslhr+ 0 tmwdpn jybgd:*2e;q:a 1k/3ed(7de, what is happening to its acceleration, how does1e/gpah dwt;*:mel02 d ekr dy(sjd3n oq:b+7 it change if air friction is ignored?

  As a freely falling object speeds up, what is happening to its (2x8 qv/nexeq rzhi..acceleration, how does it cha8 qex.. n/2h erv(izqxnge if air friction CAN NOT be ignored?

  An object that is thrown vertically upward will return to its original n66ba.hb4f +m ipy uq2position with the same speed as it had initially if a p2inuy.6+b6ah fmb4 qir resistance is negligible. If air resistance is appreciable, how will this result be altered?

  An object can have zero velocity and nonzero acceleration at the same 7i1, czw-7muxb,wz4a emv3uptime.

  An object can have nonzero velocity and zero aht.r;7 d0zvmwcceleration at the same time.

  An elevator moving from the second floor to the fifth floor making no sto)rhv70kp w m 60apgyud75bk +ops along the way has zero acceleration7) + pbvmk006wrk 5pya7o guhd all the time.

  A rolling ball moves ;q(9y; mzha/(ol e (cfy4fslyfrom $x_1=2.8 \mathrm{~cm}$ to $x_2=-7.1 \mathrm{~cm}$ during the time from $t_1=2.6 \mathrm{~s}$ 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 $t_1=-2.3 \mathrm{~s}$ is at $x_1=2.9 \mathrm{~cm}$ and at $t_2=3.6 \mathrm{~s}$ is at $x_2=7.9 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete kjd6 4p rz7cz kqa udg/7g3;l8laps around a quarter-mile ($1 \; mile = 1609 \; m$) track in a total time of 11.3 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 109 m 0i,ii z- 1debgaway in 8.5 s. It then turns abrupte 0ii ,-idgbz1ly and gallops halfway back in 4.8 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 fr9zhj.bd 6l2g- w uyo*kom $11 \; m/s$ to $25 \; m/s$ in 5.2 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 from +xe6b gn/+bzj c/0flw$19 \; m/s$ to rest in a distance of 72 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reach a speewz(f ;;u ;xsakd of $25 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $2.7 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinter can burst out of t+dc8.zyc ah 7mhe blocks to essentially top speed aboucyz7a h.d8cm+ t $10.8 \; m/s$ in the first 12.0 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 uniddxv+ 3hq j*mu(y1mky uq3u) ,r0opj1 formly from a speed of $18 \; m/s$ 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. Assu2a 8 9k/dy8 ftestwx.y1oxwy:ming a decelerat1o/d a yxt.k2yy 88t9eswfwx: ion of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck going d/.r+rhgnu zk .ee* w,$25 \; m/s$ 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 30.0pi wsm0m6w xqt s3tsv3 hgmx )29r5js93 n12lz min. After exactly 27.0 min, there are still 1100 m to go. The runner mu stm3 irl ms2g3s9m2x05wzt6 39jphn)s x wqv1st then accelerate at $0.20 \; m/s^2$ for how many seconds in order to achieve the desired time?    $s$