Suppose that an object travels from one point in space to another (0whhdvuaf8tg,7h5 h. Make a comparison75a(v h0h,h f8dhwut g between the displacement and the distance traveled.

  When is the average velocity of an objevb(.na2tj , lact equal to the instantaneous velocity?

  A new car manufacturer advertises that their car can go "frokh7a +i+g+y nz*d(zc om zero to sixty in 8 s". This is a desc+ (yc+7gkdzin ha +*ozription of

  An object moving in the +x axis expers ,w8 bvj2wm o6rz,x.g36fcfjiences 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 dot+sdwtd 99n:w wn as it approaches a traffic light. Make a statement concerning itw d 9+tswnd9:ts acceleration.

  Suppose that a car traveling to the West (-x direction) begins to styr)ew))uuna4 oy9 -f low down as it approaches a traffic li)4 reu9-ty awoun) )yfght. Make a statement concerning its acceleration.

  Suppose that an object is moving with a constantl kl 7t7n v)r)bl1zy:msmjo58 velocity. Make a statement concernin8z5krbsv )m1 o7mynl:7)l ltj g its acceleration.

  If the velocity of an object is zero, does2 u-)mv.3lx-e ,tlma - yysjkz it mean that the acceleration is zero? S3.em vlmzky 2 -u)sxytj-l-, aupport your answer with an example.

  Can an object's velocity change direction when its accelerbzh /qs3fhh6m vu1s1q htkn0r j.m-a ,/z(6cd ation is constant? Support yourzcjqqh1vth0 .u1h nssrz6/ 6 m b,a/kdmh( f-3 answer with an example.

  Suppose that an object is moving with constant acceleration. Make aef 5pj6ep0nc / statement concerning its motion w 6e/0cp5nfjpeith respect to time.

  Can an object have increasing speed while its acceleration is decreas-0avv; exqr7rnvy v 35ing? Support your answer witvn3vq7a v rvr0yex- 5;h an example.

  Suppose a can, after an initial kibsyw5kq:wisf4 oe3u+ i-uy ./ck, moves up along a smooth hill of ice. Make a statement concerning its accelere.s/4w- 3o:iyi ubu5fysq w+kation.

  Under what condition is average velocity equal to the average of the object's mkf/ety+ 7f*00 vajbb xau9n/initial bat+0m *kb/vu naefjy970/ xf and final velocity?

  Objects A and B both start at rest. They both +m kn1d():xnk g8hwwa8d ds4qaccelerate at the same rate. However, object A accelerates for twice the time as object B. ) 18adw g: (84dwsn dkkhqmnx+What is the final speed of object A compared to that of object B?

  Objects A and B both start from rest. They both aufbp0z)d) i,f ccelerate at the same rate. However, object A accelerates for twice the time as object B. What is the distance traveled by object A compafdz 0)p),ifbured to that of object B?

  When an object is released from rest and falls in the absence ) (ahf4n ena4rof friction, which of the following is true concerning4ar4e fn)ah n( its motion?

  When an object is released fromcuv m8;s m:.qb rest and falls in the absence of friction, which of the following is true concerning its m.8qu : ;cvbmsmotion?

  Suppose a ball is thrown straight up. Make a pok0o ap-e5c* d vnf 9ki8bxk 6,gsy00statement about the velocity and the accel opgysak9n i50xe80f*- dpbvkko0,6ceration when the ball reaches the highest point.

  Suppose a ball is thrown straight up. Wh 1y0282 v1sobr qyjc9mz stbc3ier+b1at is its acceleration just before it reaches its highest pzrs 21y39b+e tco0s 1v 2 yimjq18cbrboint?

  Suppose a ball is thrown straight up, reache5t;g0ps9ah g os a maximum height, then falls to its initial height. Make a staos g 9ah5g0;tptement about the direction of the velocity and acceleration as the ball is going up.

  A ball is thrown straight up, reaches a maximum heigqn 2y -z1-+h sa cgg.y6rxln4tht, then falls to its initialxgg l2y.-yq+sh nc-a n6r41zt height. 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 resistance. Make a stnq6/zr 1. -fyuaei:njatement concer fnjr-/iun61z e :ayq.ning its acceleration.

  Suppose a skydiver jumpv2ojev d07o-,ym 36h 6zoz zips from a high-flying plane. What is her acceleration when she she reaches terminal veh20o d-z3pzzi vovy,o 6me j67locity?

  A ball is thrown vertically upward wid2v0a) 4h wxvhvo4 )cath 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 the first ball? (How many times higher does the shwa)dhvcva 4vx4o0 2)econd ball go than the first ball?)

  Ball A is dropped from the top of a building. One second later, ball B isub95skcf dr, q)yz hj (.94, 3ekymbns dropped from th3jzb9nq49y)5 ss,k u(r.kcm fd y,ebhe same building. As time progresses, the distance between them

  Ball A is dropped from the top of a building. One second later, ball qqi+m.m7w1whsb0h3 s.cy(vxm r 7/ga B is dropped from the same building. As time progresses, the di7cw(v.0qgh mm1 qb.+x/ 7ami swyh3srfference in their speeds

  Two objects are thrown from the top of a tall building. One is thrown up, i 7,p gm:vj r o6(n9eaqxda/x-and tpga xnj/ 9av x6q7oi-(:d,rem he other is thrown down, both with the same initial speed. What are their speeds when they hit the street?

  A brick is dropped from m k5 q.) :7kwbbq nnhxpwb:da8kz(,q+the top of a building. A second brick is thrown straight down from the same building. They are released at the same time. Neglect air resistance. Compare the accelerations of the two qb: bw+7apz)(:xd .qkknwb mq 5hk8,n bricks.

  An object is moving with ay; p; zjg/nc ewmh*./constant non-zero velocity in the +x axis. The position versus time graph of this em;czjg /.a yhpnw/;* object is

  An object is moving with consk92( ;a azbfp ttljd++tant non-zero acceleration in the +x axis. The position versus time graph of thita2lp9d+fkbz ( +a;jt s object is

  An object is moving with cona.e,-tsna6ba. ;rq ny stant non-zero velocity in the +x axis. The velocity ve.a6rnnb;ye- sqa ,a.trsus time graph of this object is

  An object is moving with constant non-zero acceleration in the +x axis. l jw*fmo;wil kw cej3 b62luq,v; c+:2 The velocity versus time graph of this objecfw liw2wbl 6+ol ec2 ;jc m3;qkju:,v*t is

  The slope of a position versus timja( she6 z,ie1e graph gives

  The slope of a velocitiz3 ( h8)n(a:duy n0dhiqc1y vy versus time graph gives

  The area under a curve i*3p.a06 g+v:lutby sm jktm9q n an acceleration versus time graph gives

  The area under a curve in a velocity versus time41:ag60mhk k wy;ef -( imkmwk graph gives

  If the position versus time graph of an object is a horizontdnald8mc,h hv+ 9z3j6 al line, the object isal86z9hddh3, c n+jv m

  If the position versus time graph of an object isvvtkk.ix. )*;q-14wn l flz a0gs;dyi a vertical line, the object isqs v v tiflxkzi.)*n;w d1ak; -l4.y0g

  If the velocity versus time graph of an objez i*sf 8n;ly ;tig18g2, baovtct is a horizontal line, the object on s1gi;t*vliyg ,8zb28 aft;is

  If the velocity versus time graph of an object is a straight line md-/ghv )am; staking an angle of 30 degree);-md vthgs /as with the time axis, the object is

  An object moves 15.0 m north and then 11.0 m south. Find both the distance tpl4v:g.vvt/3hfdw8 jp )+vo w n5 5jagraveled and the maopnh.vfj4: )5 agjw5gvdwl / 8vt +pv3gnitude of the displacement vector.

  A boat can move at 30 km/h in still water. How long will it take to mo5 8,k z,mrs4.y i.ly txvwnn,x5m nde9ve 12 km y85 e ,.x.vzl4n,y xn59tk m,iwmrsdnupstream in a river flowing 6.0 km/h?

  55 mi/h is how many m/s? (1pk26/ g/ygaop mi = 1609 m)

  What must be your average spee lde-x):gd8/ - rupypnd in order to travel 350 km in 5.15 h?

  A runner ran the marathon (approximately 42.v1g 6gn6ywl n.oy:z5 fu)q: pg0 km) in 2 hours and 57 min. What is the average speed of zu6lyfng .py5vg)g:ownq1: 6 the runner in m/s?

  A car travels 90 km/h. How long does*oz2wt2 iz,nj it take for it to travel 400 km?

  A ly (light year) is the distance that light travv03dyi 7l00 zl 0qthwlels in one year. The speed of light is vl0t z0q3yi 7h0l l0wd$3.00 \times 10^8 \; m/s$. 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 s9i.vje o: zv/e zp)8lto the side for 4.0 s, howe zsj9z/8e:op.vv i l) far do you travel during this inattentive period?

  If you run a complete loop around an om f 4amyh+t;c9utdoor track (400 m), in 100 s, your average v;f9 +ty4mch amelocity is

  A polar bear starts at the North Pole. It trau3/ltergvytu9)l:8b fb:n) rvels 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 bea rbyb: urt8/vlf )e3 )9utl:gnr's average speed?

  A polar bear starts at the North Pole. It travels 1.0 km south, then 1.0 y1q0l* * wzsayb;mo. zkm east, then 1.0 km north, then 1.0yy b**0zsz;qaw. mol1 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 weekend6t-c ,iykf4 fd from school at 55 mi/h for 110 miles. It then starts to snow and you slow to 35 mi/h. You arrive home after dri4d i 6,ffykct-ving 4 hours and 15 minutes. How far is your hometown from school?

  A motorist travels 1 k6kk,)stek mx -5v8zq60 km at 80 km/h and 160 km at 100 km/h. What is the average speed of the motorist for this trikk-q 6vz5t s,k)8kxemp?

  A motorist travels for 3.0 h at 80 km/h and 2.0 h at 100 km/h. What is hew.ej6il1nc jq k8 ( ,nymjlmj1b9/ah2r average sl1j mn/9 l1(6wnjahij2 bqe.y, kcmj 8peed for the trip?

  An airplane travels at 300 mi/h south for 2.00 h and t5jvbj5 fi ;yxv+(r/jnt y(h d8hen at 250 mi/h north for 750 miles. What is the a +5(i8 j(/ntyb5fjvhydr xj;vverage speed for the trip?

  In a 400-m relay raceg wrm3c6vi ;3vne-54tqep- kg the anchorman (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 cover 100 m in 10.1 s. What is the largest lead the vp3meenk 6cv3tw ri-g;4-g5q 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 comesu:qd,l5l:g 7 n5cp5f(ftj zv s to a stop after 11 s. The car's average velocity during deceleration was 36 km/h. What was the car's deceleration while slowif5jfp7 5:vsd l(tg :nc, zlqu5ng down?

  An airplane increases its speed from 1czfle 9m+t z.kf/ :xicv9hl.4s bcg6 ,00 m/s to 160 m/s, at the average rate of cfe64./z f .tz9kvgcli b,cxhs: 9m l+$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h accelerates at the rate o/xf;nae 0syid/st1 ;cf $2.0 \; m/s^2$. How much time is required for the car to reach a speed of 90 km/h?

  A cart starts from rest an5 op7j-rcuv2l d 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 constant accel:pp0a*dc3 ny r *-jng ap(vqv5eratio g3jr pvyq n0a*c a*:5pdv(pn-n 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 1.5 m/s experiences a constant accelerato,k:1w ny,bix ion ofx,i,ny: wbko 1 $2.7 \; m/s^2$. What is the cart's displacement during the first 4.3 s of its motion?

  A bullet moving horif 0yii2g50kwwv oedk8c0sb6 ( zontally to the right (+x direction) with a speed of 505 m/s strikes a sandbag and penetrates a distance of 83.26 cm. What is tb0s 8i0civk wokyw6 2g5f0( dehe average acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is launched from a catapult on an aircraft carrierz4devx5 s *2zx. It reaches a speed of 42 m/s at the end of the catapult, and this requires 2vdzx ze2sx 45*.0 s. Assuming the acceleration is constant, what is the length of the catapult?

  A car starting from rgk7b)r*e i)ncgc),k wsmt6q4.vh sl;est moves 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/svli; x4yh7 lu0lzw :6jzpc+ 5s to 80 m/s in a distance of 200 m. What is its average accelerati5x7+ c0izlju;lzw h p:4y 6vlson?

  An object starts from rest and undergoes uniform acceleration. Dqayn ( x51;oqwc7 l1rxuring the first second it travels 4.8 m. How far will it travel during the 11n yx5xcwqolq;r (a7third second?

  An object is moving in a straight line with constant.;qbke,0o co z ut25hy acceleration. Initially it is traveling at 1c h5t;ouyo. 2qbzk,e06 m/s. Three seconds later it is traveling at 10 m/s. How far does it move during this time?

  A car starts from rest and accelerates un7* jajffvl, hfgvbybc:8 3/3 rr1nh7biformly 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 decelejh.ofl+i1t,zen 09 yr rate at about $5.0 \; m/s^2$ when braking. Suppose a car is initially traveling at 55 mi/h.
(a.) How much time does it take the car to stop?    $s$ (only input numerical values)
(b.) What is the stopping distance?    $m$ ((only input numerical values)

  At the instant a traffic light turns green, a car that has been waiting iphg) cjt3h+8at the intersection start h+chpi3g )8jts 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 speed of 12 4zcda qpb58l9 m/s on the surface of planet X where the acceleration due tp8q4cz 95bla do 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 7bz+:8 qwsz+wn zx .mk12 m/s on the surface of planet X where the acceleration due to graz :zw skq bxnz+w7.+8mvity 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 at6 wy2uu48mi +yy;cjc9 ;r(hw8osrmwns6c i6 speed of 15 m/s on the surface of planet X where th6ino8 cw yywr;uiscm( 8 4r h26ut+jm;y sc6w9e 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 wi22qskqx (a2ar th a speed of 14 m/s on the surface of planet X where the( x2q2qaa2srk acceleration due to gravity is $3.5 \; m/s^2$. What is the speed of the object after 8.0 s?

  Human reaction time is usually greater 9yqp8bdaob;,cqh2 1 i4/xeowx - ep1 sthan 0.10 s. If your friend holds a ruler between your fingers and releases it without warning, how far can you eo/q;i 2bpwx-b91,sc eeqoxha8 4p1dyxpect the ruler to fall before you catch it?

  A ball is thrown upward at a velocity of 19.6 m/s. What is its velocity r 4wpy4 5 5.mlhacimoowp.f2om:,7g qafter 3.00 s. ,q4y fmc2op4o5lro5whi7g.:a wpm m?

  A bullet shot straight up returns ocbgv; 7k -i,qd) s.zito its starting point in 11 s. What is the initiad-)z si kgb;7 ci,vqo.l speed of the bullet?

  A ball is thrown straight up with a speed of 36.0 m/s. How long does it v* co0xrc :c5itake to return to itr *c:cic0ov5x s starting point?

  A ball is thrown downward from the top of a building with an iz vhkt2+p+7)-5cmr)g poc8ls ( rs dbvnitial speed of 11 m/s. It str lgtp+7 )h+2-)d rk (sp5v ozrscvmb8cikes the ground after 7.4 s. How high is the building?

  A ball is thrown straight up with a spe(cxlg)g7ojc, ed of 30 m/s. (only fill in numerical value in the ),(xgc og 7jclblanks)
(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 with a speed of 397+cqs) huuz0mt- n-hi .5 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 9 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 9.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what is the :r*4 vu/yti : zwoze.ovelocity at t = 1.0 s?

  In Fig. below, what is the velocity at t = f83*iycaohw*cy/;be :o;h gq 2.5 s?

  In Fig. below, what i 7w(-6k/kw7hyd bduz ss the velocity at t = 4.0 s?

  In Fig. below, what is the velocity at91hgir-vss .h8y-sv c5f0dei: o ib* cs6yu+w t = 5.5 s?

  In Fig. below, what is the average velocity,mag :/c7bbok -xk.ll zxet): from 0 to 4.0 s?

  In Fig. below, what is the average velocity from 0 to 6.0 s?ea/ 3r9ng- uvho4 *opn

  In Fig. below, what is the acce7nccr3+2cdxhy(.r /nfbz 1 vlleration at 1.0 s?

  In Fig. below, what is the achvy hql7b9h7+d g,/jeceleration at 3.0 s?

  In Fig. below, what is the average acceleratpb0* vjieqe (:)uqrh0ks-n q (ion from 0 to 5.0 s?

  In Fig. below, what is the avwl jr*l-,c+gverage acceleration from 0 to 8.0 s?

  In Fig. below, what is the dispx3x/g ;jnt**cv f imc42of4yklacement from 0 to 8.0 s?

Does a car speedometer measure speed, veloi w2u3n h )1p:n on qvg*g8x,73lchsrmcity? {speed|velocity}

  An object can have a varying speed if its velocity is constantgox/fpyp te73 0d0g :o.

  The velocity of an object can be negative when its accel.m staa-e l/,qw:: wp:tltw dreu/1k8ebh;/l eration is positive.

  If one object has a greater speed than a second object, the first must hab q1or1jy(6szt urj7 7jp(+k sdf ,f)vve a greapf6j7v q+js)t k1oy, jud7s1z(r r(b fter acceleration.

  Two cars emerge side by sii:izb ,huqd pd,,rp3-de from a tunnel. Car 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 incre3gp 8igdhfy*tv 8a;b)asing in speed as its acceleration decreases.

  A baseball player hits a foul bal8t 8.p ebtw s+uxop*.dl straight up into the air. It leaves the bat with a speed up.dpwt8xb*set .o8 +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 acceler8 grwzdg2oy7 5b h7u-bation, how does it change if air friction is ioz bhu gbd7-2g8ry75 wgnored?

  As a freely falling 2 r- 8wnzxus6zytnb2aj2 vt;iwb.k 2)object speeds up, what is happening to its acceleration, how does it change if air friction ns 8)it vakx-22ny z ;.w6ujt2wb2r zbCAN NOT be ignored?

  An object that is thrown ver5l ,cmp,e(o 8d q fg92 v1lbk7pjixpp/tically upward will return to its original position with thei lv8xk9qj,( odfppl2, p5c1pgbe7/m same 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 zl-olih 8lzsv3kej: 85ero velocity and nonzero acceleration at the same time.

  An object can have nonzero velocity and ze3:2g+:ps 1eeu+ujq5 wp :i )f ooovwlkro acceleration at the same time.

  An elevator moving from the se*g,z a(oi:ib-kub ya:cond floor to the fifth floor making no stops alon:oy kiug*: z (bai,ab-g the way has zero acceleration all the time.

  A rolling ball movesvm/b33 olyh,d m:zs 6f from $x_1=3.1 \mathrm{~cm}$ to $x_2=-5.4 \mathrm{~cm}$ during the time from $t_1=2.4 \mathrm{~s}$ to $t_2=6.0 \mathrm{~s}$. 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 $x_1=2.1 \mathrm{~cm}$ and at $t_2=3.7 \mathrm{~s}$ 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 quart,nnuyq)8 x-wmer-mile ($1 \; mile = 1609 \; m$) track in a total time of 9.6 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 h-5glz-r)ax 6 ;m5ra:dkno fi 112 m away in 11.3 s. It then tx:gaz- k f5 oda5l m-irr6;h)nurns abruptly and gallops halfway back in 4.6 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 l+ se,bt0p jm)t9izw0md/f6r $12 \; m/s$ to $25 \; m/s$ in 4.7 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 fro9z czbr32 8 xhovzs2d9m $23 \; m/s$ to rest in a distance of 66 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must rear nhx1kzqr;ux4;1j ,ach a speed of $29 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $2.9 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinter can burst out of the blocks to essenti uhm)1n 0bs v.s)c2nikzus+6jally top speed aboui+.mh s)6u0 cjsuk n1n2sz)v bt $10.2 \; m/s$ in the first 13.3 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 spct m(en*dj su./x)k ov5* kfw1oe(ed 7eed of $16 \; m/s$ to rest in 5.37 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 k0 tqlou,fj- ah kk9z75j+n+ion the highway. Assuming a deceleraq- 59ok t+0j,zukk inljaf7h+ tion of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck goy o *8bi*kwvsx:e84p7t a9 aijing $25 \; m/s$ 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 exh;yq v,6j (lzkactly 27.0 min, there are still 1100 m to go. The runner must the,6 vhzy;jq kl(n accelerate at $0.20 \; m/s^2$ for how many seconds in order to achieve the desired time?    $s$