Suppose that an object travels from one point in space to another. Make a cn;xpyj*5:yzk.84q tl w cbmh/ omparison between the displacement and the distance traveled5y*.ypwhn jtb8kz l ;4cmxq: /.

  When is the average velocity of an object equal to the instantaneouushu4n8htq;fu, :c j v 44 i:u0ap8zmos velocity?

  A new car manufacturer advertises that their car can go "from zero to sixty i:oo6o.0 +w-f szf1 sye5uy tri ;5yglzn 8 s". This is a deswg ff; toorziy+5.10le5syu- s: z6yocription of

  An object moving in the +x axis expe60vi py*h t;eai :m7doriences an acceleration of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to the East (+x directionm0j 2frgte2-jkw (t9 n) begins to slow down as it approaches a traffic light. Make a statement concerning it 02ejkg-t jnfr(w29mts acceleration.

  Suppose that a car traveli1 wa* hc:v/ocyng to the West (-x direction) begins to slow down as i1/w:cchyo av*t approaches a traffic light. Make a statement concerning its acceleration.

  Suppose that an object is moving with a constan2fprm7 l w+pr:s8 8ipvt velocity. Make a statement concerrl8 w+vpsi2m8 p :f7rpning its acceleration.

  If the velocity of an object is zero, does ith/z eh9fv eykit/4 w87 mean that the acceleration is zero? Support /twvy9 ihk/ ee784hfz your answer with an example.

  Can an object's velocity change direction when its acceleration isl nst/x6kf1 825h-cch hm hg+,yya)dk constant? Support your answeryxhh)5yc2ks1 6l+nhdkth g/fma ,8c- with an example.

  Suppose that an object is moving with constant accelera .qwoshehfxk 4 -5 emnl+s3o0* mcyo2q/r, 2axtion. Make a statement concerning its5 sqayxes30m-r *f o4oq2c2, .k ew+xhh/onml motion with respect to time.

  Can an object have increasing speed while its acceleration x4a j/ygl zui.tc+k /0-t/ubc is decreasing? Support your answer with an exampuzk/g0ta. tl/ u-+cxyb i/4 jcle.

  Suppose a can, after an initial kick, moves up aln j 0-ipx57zhaong a smooth hill of ice. Make a sta5apjh x0in7z-tement concerning its acceleration.

  Under what conditionz z7 k3fm-orja bm4g+qmo0).i is average velocity equal to the average of the object's initial azro z o-f. mjqm0gbm)k7a+34 ind final velocity?

  Objects A and B both start at rest. They both accelerate at the same rate u aii3yv+5ws5. However, object A accelerates for twice the time as object B. What is the final speed of object Aa3+vw 5i 5ysui compared to that of object B?

  Objects A and B both start from rest. They both accele maomc( bj:(,dlv;us1rate at the same rate. However, object A accelerates for twice the time as object B. What is the distance traveled by object A compa:l bjv um;ao1(,s dcm(red to that of object B?

  When an object is released from rest and falls6b j5 l 7pno8ifsk7j6w in the absence of friction, which of the fo6nj78 jlks7 op6w 5bfillowing is true concerning its motion?

  When an object is re+xv*)wrut rd-leased from rest and falls in the absence of friction, which of the following is trudxur)t * +r-vwe concerning its motion?

  Suppose a ball is th-ti6gpd rz+:arown straight up. Make a statement about the velocity and the acceleration when the ball reaches zgt6:pr+dai -the highest point.

  Suppose a ball is thrown straight up. What f7 i3zhitb f ,:a:1vm3co:ikn is its acceleration just before it reach3okz 1 bv73caf:itif :min:,hes its highest point?

  Suppose a ball is thrown straight uroge((++ee rf-zcf q 2p, reaches a maximum height, then falls to its initialegfe-(r( ++eo frc2zq height. Make a statement about the direction of the velocity and acceleration as the ball is going up.

  A ball is thrown straight up, e : ipr0;ps+o/wgg*asreaches a maximum height, then falls to its initial height. Make a statement about the direction of the velocitps ;/:rga0ep gow+i*sy and acceleration as the ball is coming down.

  Suppose a ball is thrown downward in the aj z9,djy 2rih4cl te(+bsence of air resistance. Make a statement concerning ite y+td2z lj,j4(9ih crs acceleration.

  Suppose a skydiver jumps fr6d0v hqal-x-t lssa x(o.kz k/q1bl) 0om a high-flying plane. What is her acceleration when she she reaches terminal velax-d1 lsx/0o(a-t.l0 6kl vhsqk q b)zocity?

  A ball is thrown vertically upward with a speedctcoz **5 h/ wt+ 09xmagb9ysj 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 th9+s9o 0/cj ctbma5x*gzw*y the second ball go than the first ball?)

  Ball A is dropped from the top of a bu21k .rht zcs(uilding. One second later, ball B is dropped from the same bkz(ur.2 hs1ct uilding. As time progresses, the distance between them

  Ball A is dropped from the top of a building. One secondy6v yre- 05,4dzayetg later, ball B is dropped from the same building. As time progresses, the difference in t r0t5yz-46 ,gyeeyad vheir speeds

  Two objects are thrown from the top of a tall buiqpvx t1anhus z-1d)37 lding. One is thrown up, and the other is thrown down, -)a 1vp1 ht s37uzdnxqboth with the same initial speed. What are their speeds when they hit the street?

  A brick is dropped from the top of a building. A second brick is thrown straigh)cam 1/lq mae;t down from the same building. They are released at the same time. Neglect am; m/ aaqlce1)ir resistance. Compare the accelerations of the two bricks.

  An object is moving with constant non-zero velocityk. yoi;x8m dq6fjex7;x w (j)q 9uq8it in the +x axis. The position ve. ft8ieiw7jyxq) u6qox(m98;;q j dkxrsus time graph of this object is

  An object is moving with constamy 79vej6if/ pnt non-zero acceleration in the +x axis. The position versus time graph f9jy mv6iep /7of this object is

  An object is moving with constant non-zero velocity in the +x axis. The velocityav33 18+zljxx n*gfpo versus time graph of tpz fv3joxx+lg*n38a1 his object is

  An object is moving 1bo -yt yal)7gwith constant non-zero acceleration in the +x axis. The velocitgl7 a )o-y1tbyy versus time graph of this object is

  The slope of a position veff z1.x agu*a8rsus time graph gives

  The slope of a velocity versus time graph eb*02a 86ga bf qyaufm8j .gv5gives

  The area under a curve in an acceljfj dz 7rn90t3z7jh 1ceration versus time graph gives

  The area under a curve in a ve2t4,1-9fk g f2 o*sbrg oklhodlocity versus time graph gives

  If the position versus time graph of an objectld x(vlg..grv k / q2kaf-l:2g is a horizontal line, the object i2lg:g2vk/g (.lqd-l rk.fxavs

  If the position versus time graph of an object is a vertical line:nitr sl4 vq/m/c/o x4, the object is4 oxt/m/c qr l:n4si/v

  If the velocity versus time graph of an object is a horizojsyd0re1-v fizs/v -9s,u8gzntal line, the object isvz 901u,e -i yjz-/s8rfgd svs

  If the velocity versus time graph of an object is a straight line making an anglfp +nzlwqu5s7u4ix4 7(m:p9.uo avkpe os+ai q5upzk l7n44vm (: f.o9 p7uuxwpf 30 degrees with the time axis, the object is

  An object moves 15.0 mcow o82 t0vyi; north and then 11.0 m south. Find both the distance traveled and the moc 2wv0 ytio8;agnitude of the displacement vector.

  A boat can move at 30 km/h in still water3tgef01- m9d zo 0setd. How long will it take to move 12 km upstreamdz 03s 9-gt1dfeemo0 t in a river flowing 6.0 km/h?

  55 mi/h is how many m/ztg:7qyzr+ aiae 4nl( yp+u3rji8j 6/s? (1 mi = 1609 m)

  What must be your average speed in order. st0+nsw nn9e95plszuk u(q4 to travel 350 km in 5.15 h?

  A runner ran the marathon (app0z))yh ;: fh nno tvy2h1.fhhnroximately 42.0 km) in 2 hours and 57 min. What is the average speed of t. yh:fn;hv1htz )n 2ho)y0nhfhe runner in m/s?

  A car travels 90 km/h. How long does it take fory ny9fl. /7gvwb-(q gn it to travel 400 km?

  A ly (light year) is the distance that light travels in onm+ek+ sr ndr6/e year. The speed of light ++/nm6sdk rer 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 fo t)u4 idew)3bjim)c+gof6xlp p1/ez:r 4.0 s, hx 1m:ijew3 oe4p )g)6 uc/zltdfb+) ipow far do you travel during this inattentive period?

  If you run a complete loop around an outdoor track (400 m), in 100 s,; s cl9; fbqs gp*g(hf m2dzrv7aq9:+b your average veloc qh2;v +g7g9zqp r:(lb9dsffbma*s ;city is

  A polar bear starts at the North Pu j8f9qgzme2nn3 7ui5ole. 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 average speed? 2 7fun5 z9jqmnige3u8

  A polar bear starts at the North Pole. It travels 1./j8 73iqqi+vclt; azi0 km south, then 1.0 km east, t+;i7/a83 zcjivqt i lqhen 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 average velocity?

  You are driving home on a weekend 3kuvch 5qhp-) from school at 55 mi/h for 110 miles. It then starts to snow anphh v-5q3)u kcd 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 km at 80 km/h and 160 km at .- i/ijsdfvxle+k2alx5y 2j; 100 km/h. What is the average speed o2 j xixlik-/l;5ae+fj.dv 2sy f the motorist for this trip?

  A motorist travels for 3.0 h at 80 km/h and 2.sfd70azzrz/ )qi+( d m0 h at 100 km/h. What is her average sp 0zdf+da(mr / z)z7qsieed for the trip?

  An airplane travels at 300 mi/h south for 2.00 h)h iz/iznwjy m92g 6sqgy4op 0)-b0be and then at 250 mi/h north for 750 miles. What is the average spbsioe)0mywh )/02q6 z gn9gjipy4 -b zeed for the trip?

  In a 400-m relay race tmjge ;2bj5r32r8p dn ehe anchorman (the person who runs the last 100 m) for team A can run 100 m in 9.8 s. His rival, the anchorm23rmdb prj2j;e g58enan 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 c7lit/yf , 2ppiuosm+3evd1c :omes to a stop after 12 s. The car's average velocity during deceleration was 60 km/h. What was the car's deceleration whileylt: f, 3+i/1o p72cisvpudem slowing down?

  An airplane increases its speed from 100 ml zqqu71fv7 ei5+w (fj/s to 160 m/s, at the average rate of v+l fu75(jiq7 1e fwzq$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h accelerates at l).*g z8k/nu- uzmkqw,n: yamthe 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 j8o8o np9m,nyand 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 constants.tfrtoc4 vh7ieskc+: pt*99 acceleration 9 t*s+: 97rfpck oe4 ivs.htctof $2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial velocity of 6.2 m/s experience3g*eiib;me -ad9 7jpz yh 8hq)s a constant acceleration of g 8397 i*ja qhp)ey -bdzm;ehi$3.6 \; m/s^2$. What is the cart's displacement during the first 9.4 s of its motion?

  A bullet moving horizontally to the right (+x direction) with a speed of 515 m/s04jo qb.rse;q2 hscf) strikes a sandbag and penetrates a distance of 16.96 cm. What isq0 h fq2bse.c;j)rs 4o the average acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is launched from a catapult yn6gqt;mdvaw;j-y au4a76 , gon an aircraft carrier. It reaches a speed of 42 m/s at the end of the catapult, and this requires 2.0 s. Assuming the acceleration is constant, aq6tnj6g4a,;my vyw7-d ua ;gwhat is the length of the catapult?

  A car starting from rest moves with constant acceqom zz:;3fdrapu ycg93ec5oa)*x 8i 5leration 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 20 )qk7c 8nd2owik5r3u n0 m. What is its average acceleration?7w 3rq2kicno5ukn8 d )

  An object starts from rest and undergoes uniform accelrc )9o(bc4agoeration. During the first seccb9g)4ooacr ( ond it travels 3.2 m. How far will it travel during the third second?

  An object is moving in a straight line with con 6gygttc9a,kq904p b fstant acceleration. Initially it is traveling at 16 m/s. Three seconds later it is traveling at 10 m/s. How far does it move during this time0,b 69yk4pf9 tgcaqt g?

  A car starts from rest and accelerates uniformly -cgbp il,/y,c08obm9 9z n klzat $3.0 \; m/s^2$. 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 decelera uo cg5 ( rf9z+p2koqqd*ik8v (2x8qcgte 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 li b:sirl9(*omgght turns green, a car that has been waiting at the intersection sio*rm :sl(9 bgtarts 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)gkn19 i7m wz.:clm,b,lsu fm/6 imuw of 12 m/s on the surface of planet X where the acceleration due to g) smk1u.gwwf ll,:/izm9 ,cnb 7ui mm6ravity is $1.5 \; m/s^2$. What is the maximum height reached by the object?

  An object is thrown upward x5hj6q9uj 6dl.hjrfunq:-l ( with a speed of 12 m/s on the surface of planet X where the acceleration due to gravity is:jf hr j(xu-qudlh .9ql656j n $1.5 \; m/s^2$. 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 + fbgg bm,p5a/-ywa r fw6/by7rz( am5surface of planet X where the accelerat,-yrfw +w7 /zymr5aaba fg 65/mb b(gpion 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 thpp ;an0. :y3mdbgc3 ;p hfdnz.e surface of planet X where the accp30p3 ;d:apb;nzn .c.h mdgfyeleration due to gravity is $3.5 \; m/s^2$. What is the speed of the object after 8.0 s?

  Human reaction time is us(wc3vnx 92gnxumh6 0( xh zzl6ually greater than 0.10 s. If your friend holds a ruler between your fingers and releases it without warning, how far can you expect the ruler to fal6v wux 6h0xm2n(x(nh z lcg39zl before you catch it?

  A ball is thrown upward at a velocity of 19.6 m/s. What is its velociq:3 il)ejfip+j dof rab)pb7r +8*un(ty after 3.00 s(n+)fd ub qapiprel8ji +j)f7 : *or3b?

  A bullet shot straight:tfevv -m 1sw, up returns to its starting point in 9 s. What is the initit:f, -ws1vvemal speed of the bullet?

  A ball is thrown straight 84rr )/fg 5pgtcmux;s up with a speed of 36.0 m/s. How long does it take to return to its starting potgm)r gp85 f4csurx/; int?

  A ball is thrown downward from the top of a building wi;7 7hb+bldhz q fxkq8 iz o64inn8a-3eth an initial speed of 28 m/s. It strikes the ground after 5.5 s. How hqz8f-hai6onbnq blx8h7kd +;i3 e4 7 zigh is the building?

  A ball is thrown straight up with a speed of k1kjeu kdzgp/m:6ut,up 8aa+ qk9dgk8 ;nf 0830 m/s. (only fill in numerical value in the blankfd0p,u kmz+tkagnk9k8 818edak/p;q ju g:6 us)
(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 straitrxjk:k1u vat+e-:dho x.1;b ght up into the air with a speed of 29.8 m/s. (use $g=10 \; m/s^2$, only fill in numerical value in the blank)
(a.) Calculate the time required for the ball to rise to its maximum height.  (数值)  $s$
(b.) Calculate the time for the ball to fall back to the height at which it was hit.  (数值)  $s$
(c.) Calculate the maximum height reached by the ball.  (数值)  $m$
(d.) Calculate the ball's speed 2 seconds later.  (数值)  $m/s$
(e.) Determine the time at which the ball pass a point 14 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 14.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what is the v0n(.d2omn xw0yab9t lgz r2+ celocity at t = 1.0 s?

  In Fig. below, what is the velocg0:y hf- t;hdoity at t = 2.5 s?

  In Fig. below, what is the velocity at t = 4.0 6 xbfgmyvi.+0 s?

  In Fig. below, what is the velocity at t =p*yaas 1b0 di5 5.5 s?

  In Fig. below, what is the average velocity f v -v x:)ul7o7hik6zrprom 0 to 4.0 s?

  In Fig. below, what is the averawv/i+wp,(ztpbsh 414m v,r1d*rn rb kge velocity from 0 to 6.0 s?

  In Fig. below, what is the acceleration at 1.0 )89hp5u. wi/fpzuw 1xuj spj4 s?

  In Fig. below, what is the acceleration af4gtjadsrb qq7 0q2jr8 am 4;;t 3.0 s?

  In Fig. below, what is the average acceleration from 0 to 5.0 eaz2;sms:/mj/x k*de+zgo pw/p y1u0s?

  In Fig. below, what is the average acceleration 86dhtf dl55llfrom 0 to 8.0 s?

  In Fig. below, what is the -szy;03(rqsg sbpek9displacement from 0 to 8.0 s?

Does a car speedometer measure speed, velocity? {speed|velojo /bc2.oohc:d9w f4 lcity}

  An object can have a varying speed if its velocity is e:oqj,;xg) u;lp8vwhz d3 -lbconstant.

  The velocity of an object can be ne0;xiw1nx o9nugative when its acceleration is positive.

  If one object has a greater speed than+4m 7nxq*hp8s nw ksj1 a second object, the first must have a greater p7nwnk sj *+mqxh418s acceleration.

  Two cars emerge side by side from a tunnel. Car A is t bfkz ,ridu:cz+f *7)hraveling 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 incre , b5:vq8(z * .wqrynvuo5hfzfasing in speed as its acceleration decreases.

  A baseball player hits a foul ball straight up into the air6 l,)tg38g 32j;0z(o kfnirlir ty cmw. It leaves the bat with a speed of i(6y;83lnj0rg gtcol iz2k t3f)rw,m $120 \; km/h$. 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 obftz6eebk/5-m1 wx i4uject speeds up, what is happening to its acceleration, how does it chang-kteu 654wzi1mx/be fe if air friction is ignored?

  As a freely falling object speeds up, what is happenk:p v:h/6 ;s cdimc g4n bk9ex7pn8ivz,mc(n0ing to its acceleration, how does it change if ai:/4vi ck v7c8pn0npx;ns6d(m 9igk m ezchb,:r friction CAN NOT be ignored?

  An object that is thrown vertically upward will return to its originalgztq vv2 0en;u r(a (0vc*gjy) position with the same speed as it had initially if air resistance is negligible. If air resistance is appregqn)v e;tayv (*j(2 ucz00g vrciable, how will this result be altered?

  An object can have zero velocity and nonzero acceleration at the same time y8y5t;io(dx13kpi en .

  An object can have nonzero velocity and zerw4d dfp7jmc5.5gi4zl o acceleration at the same time.

  An elevator moving from x6- z 8jd.*wdy 2vfamrc-,tceuca9,gthe second floor to the fifth floor making no stops along the way has zero accelerationd-6ezmdgav ccwr. 2u* jyft8cx -a9 ,, all the time.

  A rolling ball movese*k::e4n9xy h s quj5+m4jt ns5xup1b from $x_1=2.0 \mathrm{~cm}$ to $x_2=-7.9 \mathrm{~cm}$ during the time from $t_1=2.7 \mathrm{~s}$ to $t_2=6.1 \mathrm{~s}$. What is its average velocity?  (数值)  $cm/s$ (only fill in numerical value please)

  A particle at $t_1=-3.8 \mathrm{~s}$ is at $x_1=2.7 \mathrm{~cm}$ and at $t_2=4.4 \mathrm{~s}$ is at $x_2=8.4 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete l2/tpwoiph7 g- x xlb69aps around a quarter-mile ($1 \; mile = 1609 \; m$) track in a total time of 9.7 min. Calculate (a) the average speed  (数值)  $m/s$ and (b) the average velocity    $m/s$

  A horse canters away fromg . 2cg m2o)+s8 c2ja(kll o)sy+fcuec its trainer in a straight line, moving 103 m away in 11.9 s. It then turc2yl(go2g)c +s 2k8a)jumce+slfo c .ns 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 r)v5koqd 9+*o 48d ,gpuzqco.g/nam w$12 \; m/s$ to $24 \; m/s$ in 4.5 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 fro3v 3hx6 jc96a hpr;fr. rk7ggtm $18 \; m/s$ to rest in a distance of 84 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reach a speed zhu7) /tqgkqbf8in :s,k**lkea* + rfof $26 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $2.1 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinter can burst out of thowslb +ni -*;ie blocks to essentially top speed about oi+-i ;bn wl*s$11.0 \; m/s$ in the first 11.8 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 otg,6w zm)v/3culn e: of $19 \; m/s$ to rest in 4.58 s. How far did it travel in that time?  (数值)  $m$

  In coming to a stop, a car leaves skid marks 92 m dnie5y.f*wr.z:mz d 44p+jx v long on the highway. Assuming a deczmx i z dj5wfvn:4+y.rd* .4peeleration of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck goik3ofy gbna.4a4i , m(09ohd sang $25 \; m/s$ 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.4;oqwx,u i7+fhfy, pt After exactly 27.0 min, there are stiq4+pwyf, ; fixt 7uho,ll 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?    $s$