Suppose that an object travels from one point in su8:m 1 oiwk;s 1dj4liupace to another. Make a comparison between the displail ;8:1usmuokwd 4ji1 cement and the distance traveled.

  When is the average velocity of an objxs265 / zicskk6qk;kxect equal to the instantaneous velocity?

  A new car manufacturer advertises that their car can go)p4yz/ic lg5 o "from zero to sixty in 8 s". This is a des5gc/)l oyzp4icription of

  An object moving in the +x axis experiences an acceles3p5wna88w :mpqrdz +ration of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling tid *(mkiw71 uauvwa,m nrc+(9o the East (+x direction) begins to slow down as it approaches a traffic light. Make*d,nmimua wc1((i9u+7vr k wa a statement concerning its acceleration.

  Suppose that a car traveling to the West o+elg(m1pb8)k nj9 :+iijidx (-x direction) begins to slow down as it approaches a traffic light. d+ 1(p:) ej iixloibnjk9 mg+8Make a statement concerning its acceleration.

  Suppose that an object is moving with a constant ve4a;w d*88iz5 hku k7vkilifc,locity. Make a statement concerning its accelerw*ii;a8 4ck zhl8i kv7fd5uk ,ation.

  If the velocity of an object is zero,)y rz5k-71kyydc: zve does it mean that the acceleration is zero? Support your answer with an exampz7vc ykerk1y5zd- )y :le.

  Can an object's velocity change direction when its acceleration is constant? sdr4 2) g 0bjx:7gabdt8p3 eztSupport your answer with an dg tdt ax2jb0sb 473:)8zre gpexample.

  Suppose that an object is moving)x83 skoi p9t*2*wdq hw9oyzx with constant acceleration. Make a statement concerning its m9wzohqk*p s9*8dwx 3)tyx io2otion with respect to time.

  Can an object have increasing speed whia b l o:qi6yxix20,x(dle its acceleration is decreasing? Support yourbayl6:qx ,2ix doxi0( answer with an example.

  Suppose a can, after an initial kick, moves up as3n/1 xv7); tiiuwuh zlong a smooth hill of ice. Make a statement concerning its accel/z 1vhn)u;ixu7st 3iw eration.

  Under what condition is avera: bpf-rh/pa84* lmwln.tiw (lge velocity equal to the average of the object's initial and final mw.wpfpn a: -t4rlbllh *8i(/velocity?

  Objects A and B both start at reh jq :(np2 o17kv*cytnst. They both accelerate at the same rate. However, object A accelerates for twice the time as objecp(*:v o 2n1tkn7hycjqt 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 s szweby4 y,+bme:9r2the same rate. However, object A accelerates for twice,+4y: werym2sezs bb9 the time as object B. What is the distance traveled by object A compared to that of object B?

  When an object is released f 7*rcjo2m5rb:k;oycm rom rest and falls in the absence of friction, which kjorm m c7:;5br*c2 yoof the following is true concerning its motion?

  When an object is released from rest and falls in the dhrmje-i 6i1 9utx;.z vy3jt( absence of friction, which e9; ( hu 1zd xjyrijmt.-6iv3tof the following is true concerning its motion?

  Suppose a ball is thrown straight up. Make a stbtfkux02 g1e1 i na7z,g;l uo;atement about the velocity and the acceleration whe;n l11 07t ux;boiggaz,uekf2n the ball reaches the highest point.

  Suppose a ball is throw3p dt tyf* sqd0ou70;hw krl2,n straight up. What is its acceleration just before it reaches 2u, p3f dtsh0 qy*ko0 t7;drwlits highest point?

  Suppose a ball is thrown straight up, reaches a maximu :y6uzb-os, ebm height, then falls to its init-bus,oy:b z 6eial height. Make a statement about the direction of the velocity and acceleration as the ball is going up.

  A ball is thrown straight up,l(dsf 07md9y5okn k+i reaches a maximum height, then falls to its initial height. Make a statement about (0skd+io l7yd9 fmk 5nthe 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 stk 9mj43gsjxpp lza1 m2oz:9.w 03 uzmbatemgp p 49 j33muzxajm9l2z1 ow.z0m:ksbent concerning its acceleration.

  Suppose a skydiver jumps from a high-flying p 6k137x+yuziyrcd 0 w y5/ 8iukr7un.ycbxd0llane. What is her acceleration when she yr kcxnz+x3rk7ld8y6uui/ 7b u0 w10y dc5y. ishe reaches terminal velocity?

  A ball is thrown vertically upward with a speed v. An identical second ball i-*6s b.ibntu rs 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 second ball go than i.sn*u -tb6br the first ball?)

  Ball A is dropped from the top of a building. One second later, ball B i7cp d(g xqezlp1kc;93s dropped frox(p1d 7z;lcgpekq3 c9 m the same building. As time progresses, the distance between them

  Ball A is dropped from the t9wg; z p;y;qotop of a building. One second later, ball B is dropped from the z9qp; g ;ty;wosame building. As time progresses, the difference in their speeds

  Two objects are thrown from the top of a tall building.kbz16v bmg a7 fb0yt53 One is thrown up, and the other is thrown down, both with the same initial speed. What abmfa75v6z tkbbg 1y03re their speeds when they hit the street?

  A brick is dropped from the top of a bu+ g39xkenw)cfg2(ef:cr nmg o 2 09ohsilding. 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 bricks.xgg2co e)cm:enr o9 3wkfh0gn9 (fs2+

  An object is moving with constant non-zero velocity in the +x a,zrwe,jx8-h9mbxhb ,lnb * k (xis. The position versus time graph of this objez*m, l-en8hbr ,hxw kb( ,9jbxct is

  An object is moving with7j cqhol*/1a )pfd*. x tjw9zi constant non-zero acceleration in the +x axis. The positiotxlhp 7fq/o1*.wd i9*)j acjzn versus time graph of this object is

  An object is moving with constant non-zero velocity in thwk2a:ua k6w :pfjj c+0e +x axis. The velocity versus time gr pku0fkj+a:2ww:6 a cjaph of this object is

  An object is moving with constant non-zero acceleration 2 hv*ycb4v prazfoiz0mfw, hi y,/ x e/+n6//xin the +x axis. The velocityy ,p h0/brxf,z4z /x /ai6f*i/h+y2 nv omcwve versus time graph of this object is

  The slope of a position gwx.gvr: 15fjve3c o*versus time graph gives

  The slope of a velocity vers f)s( 4jnu5f sk)d*lrous time graph gives

  The area under a curve in an acceleration versunt3 . 5-m/eskxi wibh)um:q6hs time graph gives

  The area under a curve in a velocity versus time: ds +7a,tlvitc pw66f graph gives

  If the position versus tiu5-q8,n(,c d yia pexwme graph of an object is a horizontal line, the object iapc-w yidqn u(,x5e,8 s

  If the position versus timwvns+ mpn+ (ct93 jys66u6ssde graph of an object is a vertical line, the object iscy 9dss+6vw3 n6t+ pusn(mj6s

  If the velocity versus tn86.w wqcw.jw:q xaiux9(69 bd )wdzoime graph of an object is a horizontal line, the object w 9oxawq) b:cnxw 8uqd.6 d(j6.zww9iis

  If the velocity versus time graph of an object is a straight x-u)j r1ez tu6yzdbi) mr8t( se 9hk*;line making an angle of 30 dexi )zy8d6-(rh* eb;jz)tutmr9sk1eu grees with the time axis, the object is

  An object moves 15.0 m north and then 11.0 m south. Find5(iv 3t rvd.nj both the distance traveled and the magnitude of the displac53td(.vvjr in ement vector.

  A boat can move at 30 km/h in still water. How liag yt5( )d hx; /y5q1qby2rhkong will it take to move 12 km upstream in a river flowing 6.aq25y)b5 ( ir/khy1txdyh q;g 0 km/h?

  55 mi/h is how many 4 rieb,-( wj9uyqw: 69k hn.wcfjqve )m/s? (1 mi = 1609 m)

  What must be your average sp)y mg;rem+xy(.pw ku 3eed in order to travel 350 km in 5.15 h?

  A runner ran the marathon (approximately 42vlaq d*0 lml (ml*)bc/.0 km) in 2 hours and 57 min. What is the al(d cl /bm*lmaq*)0vlverage speed of the runner in m/s?

  A car travels 90 km/h. How long does it take for it to travel 400 kmmdy i)m h6c./bc)0rvr ?

  A ly (light year) is the distance that light travq.3sd t /xlb7vels in one year. The speed of light is 3tv.x7 d/qb ls$3.00 \times 10^8 \; m/s$. 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 09njn eo-ajum+d)f o; side for 4.0 s, how far do yoo +-n9nm ;)doe0uajjfu travel during this inattentive period?

  If you run a complete loop around an outdoor track (400 m), in 100 s,xblai min 28ep45 t15u your averau1 42mxl 8ita5iep5bnge velocity is

  A polar bear starts at the North Pole. It travels 1.0 km south, then 1.0 km ea+w g ;fi0,u-orl ss.pdst, 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.sgl, +wu -fpr0oi;sd?

  A polar bear starts at t xd3b8qzk t/q nx ,qukybgf6j rz,/388he 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 bead388//bqzubkr8x3t 6fkgy jqq,nxz, r's average velocity?

  You are driving home on a weekend from , oiws:a+ bobsobqp4.4b.1o bschool at 55 mi/h for 110 miles. It then starts to snow and you slbq4+ b1b4.sosb :w.ao iobo ,pow to 35 mi/h. You arrive home after driving 4 hours and 15 minutes. How far is your hometown from school?

  A motorist travels 1gmi o3w8;eqg o7sixj n6;37xf60 km at 80 km/h and 160 km at 100 km/h. What is the average speed of the motori8iof3xi q6g; je 3w ;o7n7xgmsst for this trip?

  A motorist travels for 3.0 h at 80 km/h and 2.0 h at 100 km/h. What is h8,-ztlx 2pz m,gsjr0 fer average speed for,8l m-grfp2xjzst z0, the trip?

  An airplane travels at 300/v b;m95tsb:fuzt z4v mi/h south for 2.00 h and then at 250 mi/h north for 750 miles. What is the average speed f/t;5:mv fbb94u vs zztor the trip?

  In a 400-m relay race the anchomsl4 rt6ts.nj k mewrp:-:07d rman (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 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 rant60wsp7kmlrtj -: dms4e.: rce?

  A car decelerates uniformly an5 : w9wm,foqz 0.fi: jlnvaer,d comes to a stop after 10 s. The car's average velocity durinli fj q5.em :o w:r,zw0vf9,ang deceleration was 60 km/h. 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 ratw1 co3xfw r81se of 1wr1 x c8fswo3$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h um3 zbqnu4n4w ao are;-gc*9m(.r rx4accelerates 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 i4jjy4-ozqpd n;uk2 a1pbeymo; .v .3and 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 th)r6w3u.9uit n,bml +)vdtqrt wd- -ihen speeds up with a constant acceleration )q3.d-h luivd-itt)wr trb6 w ,um+ n9of $2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial velocity of 5.7 m/s experiences a 6 jizlti 0at9x6dot3g)yx 4.p tds2( lconstant acceleration otzs)06xd(tli t6d 3poj.9 iat 24xy glf $3.2 \; m/s^2$. What is the cart's displacement during the first 7.6 s of its motion?

  A bullet moving horizontally to the right (+x direction) with5:wbe8ido/ h0)m k wq/.cfrlt a speed of 333 m/s strikes a sandbag and penetrates a distance of 59.37 cm. What is the average accelerati/) 8d mlfqt b0o5:kcw/er.h wion, in $m/s^2$, of the bullet?

  A jet fighter plane is launched from a catapult on an aircraft carrier. It rexz mm7o 9s1;0t7mj fqeaches a speed of 42 m/s at the end of the catapult, and this requires 2.0 s. Assuming the acceleration is constant, what is to 0zq7m7 mfmt9 ;xj1eshe length of the catapult?

  A car starting from rest moves with constant acceleration of t ;/b9h;nvsqdu 3yj)e$2.0 \; m/s^2$ 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 yr56d riwy7ea. z(l8cof 200 m. What is its average accecyldira .zy6rwe75 (8 leration?

  An object starts from rest and undergoes uniform acceleration. During theum.v3(hg0( yofmln m9 first secmlm3gmhn 9 vu(f( o.y0ond it travels 5.4 m. How far will it travel during the third second?

  An object is moving in a straight line with const7m1np;aq x.w*ti1d cq l, o8ru,nn*xiant acceleration. Initially it is traveling at 16 m/s. Three seconds later it is trac rq7 .,*1;a ndiuxlqxn *mn1tp8 ,oiwveling at 10 m/s. How far does it move during this time?

  A car starts from rest and accelerateg:nanjpo e9+5s 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 *r5zf2 qud o7/ gorz)wat 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 thatq 26rgj11ex hu has been waiting at the intersection starts ahead with a constant accq2e16 ujgr1hxeleration 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 upwardvk-dv /-ku8al with a speed of 12 m/s on the surface of planet X where the accv 8k /k-vaud-leleration 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 9k2vt8i y jadrr;( (: nnfjj6c4q5jhu m/s on the surface of planet X where the accelerationj; u(n8j t6 v:yhjrajc r(9f5d24 niqk 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 4-yl ; .nu g+tdx;qw)nhrpo0za speed of 15 m/s on the surface of planet X wheqtnu4ohwg pzn lr-;+. 0 dyx;)re 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 *ai0ows,h6rso i+kh0 on the surface of planet X where the acceleration due to gravih,i 0sh*w okari6+ 0soty is $3.5 \; m/s^2$. What is the speed of the object after 8.0 s?

  Human reaction time 3v lf yylq2gfy+y+2;xis usually greater than 0.10 s. If your friend holds a ruler betweenl2yxy3vqf+y l f+g;y2 your fingers and releases it without warning, how far can you expect the ruler to fall before you catch it?

  A ball is thrown upward at ac utr o7gggh9137xnfaq)k7 ( a velocity of 19.6 m/s. What is its velocity after 3.00 sk(7rxaq hc13 g a )on79gutfg7?

  A bullet shot straight up returns to its starting point in 8 s. What is th88q(/tgq mle4u ok3zxe initial speed of the bull xo8tql(mq4 uek83 gz/et?

  A ball is thrown straight up with a speed of 36.0ht32z aeq)zbbig 2fwe) 045 bo m/s. How long does it take to return t hz2zeqobiwg5))efb 2bt4a0 3o its starting point?

  A ball is thrown downward frfmsw7 xbn i :9ks9v)x(om the top of a building with an initial speed of 8 m/s. It strikes the ground after 1.5 snvwsb :x)fx s7mi9k9(. How high is the building?

  A ball is thrown straight up with a speec6t z/d 2crvu:d of 30 m/s. (only fill in numerical value in tt/2 c :u6vzcrdhe 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 into the air with a rh ,vuglyvn*(rz5m9hyu 8 / n.speed of 25.4 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 10 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 10.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what is the velocity apa*ipvxmd *(2t t = 1.0 s?

  In Fig. below, what is the velocitr2 kn0q2 ,agozm 6u.bb5 xlogv,tnx: jr32cj3 y at t = 2.5 s?

  In Fig. below, what d- g7fwm.o *-j vrgod+is the velocity at t = 4.0 s?

  In Fig. below, what is the velocity at t = 5.5 seldarh)gnf7 v (e*m, 4*cfi d8?

  In Fig. below, what is the averagesys-,jb-pav7h z l-n: velocity from 0 to 4.0 s?

  In Fig. below, what is the average/*pk40;ox ire uzju)/y ajg;g velocity from 0 to 6.0 s?

  In Fig. below, what is the acceleration at qf9h)g .kejx2 1.0 s?

  In Fig. below, what is the acceleration uzx2f b+ h():+xlowg bat 3.0 s?

  In Fig. below, what is th.h- 1px-h/ yx ykfs0vse average acceleration from 0 to 5.0 s?

  In Fig. below, what is the average acceleration from 0 to 8bw 9 6x:t u rxs. xb 9,/putn3-bosfns7d+4gdx.0 s?

  In Fig. below, what is the displ;3zc; fpf4a;h;io ktwacement from 0 to 8.0 s?

Does a car speedometer measure speed, velocity? {speed|velocityjc*-/2 dd ie)vvqw5vqw m)d/u)piwo1 }

  An object can have a varying speed if iye;ycj2gc*;q*zhg7y1 jhs3c ts velocity is constant.

  The velocity of an object can be negative when its accelera*c(xckglx-x 5 hn u-3ution is positive.

  If one object has a greater speed than a 1 v, gzlc ;jg:gc3tm.bclw et:8i8(gssecond object, the first must have a greater accelgg1cm b8ztjgc8 3i(l v.:gscw :; et,leration.

  Two cars emerge side by side from a tunnel. Car A is ncu6 0/.a+jr-y(et 0hz(jqko6a ykw n 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 decr7mo f9; hyg6aoeases.

  A baseball player hits a foul ball straight up into the air. It leaves th*bmg.cd if a a51af*c2e bat witba2*g i5ac mf.c1fad*h 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, what is happening to its acceleration, hoq v)5 e) 1e.nwend66 zwccxj+uw does it change if air fricti6v 1d+n uzejqce)6wncew 5x.)on is ignored?

  As a freely falling object speeds up, what is happening to its acceleration,)qq j4qu8lamm3x ,,pq how does it change if air friction quj,l mmqa8)p,qx43q CAN NOT be ignored?

  An object that is thrown verticallyyni:nkd lt *y77 qyrj*4-/m jhucep4( upward will return to its original position rhnquim - d747tcl/ (ky*:n4j* ejyypwith the 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 zero velocity and nonzero acceleration at thb;)hrezo.6b vc ,-vyye same time.

  An object can have nohnv7-ij2nv7b jc2 ry.nzero velocity and zero acceleration at the same time.

  An elevator moving from the second floor to the fifth floor 6esqi ry+ 1h/imaking no stops along the way has zero accelers/hie+iy6 q1 ration all the time.

  A rolling ball moves frompms8dh 2 qd o:rvrnl tl+v +d 6ph+dc.;l2;w+n $x_1=2.1 \mathrm{~cm}$ to $x_2=-5.9 \mathrm{~cm}$ during the time from $t_1=1.0 \mathrm{~s}$ 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 $t_1=-2.6 \mathrm{~s}$ is at $x_1=3.0 \mathrm{~cm}$ and at $t_2=4.3 \mathrm{~s}$ is at $x_2=7.2 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete laps ar8z9jrj- m tn)pound a quarter-mile ($1 \; mile = 1609 \; m$) track in a total time of 11.5 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 92 m a47 24sxui1fmqm*fmfg way in 9.8 s. It then turns abruptfisf 7mmf4 g*241mxuq ly 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 from oie3o.:0d5 mzkfijf )a(3orq $10 \; m/s$ to $25 \; m/s$ in 5.6 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 .3j eiy8 m+cg yg24ddo$22 \; m/s$ to rest in a distance of 71 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reach a speg.vctq.)wu/ s(pa(9 t.k opwued of $32 \; m/s$ 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 the blocks to e/fj w(1;z+m3ol 6tsov hq9 patssentially top speed abouptvt/f;9wms o16j q+zl ho(a3 t $11.3 \; m/s$ in the first 13.8 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 g1swcp v5p7n(*eb 7ce/ v j-oofrom a speed of $17 \; m/s$ to rest in 5.84 s. How far did it travel in that time?  (数值)  $m$

  In coming to a stop, a car leaves skid marks 92 m longy r9efvm;o 9f6 on the highway. Assuming a deceleratif9;yo6m rfve9on of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck ghp fji9 5hwyrv)q2.t +9me+ytoing $25 \; m/s$ 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 ttw5 m;oea01h*-v1nyhq7v uo xhan 30.0 min. After exactly 27.0 min, t yqwu oth*0 -m5ax; 7o1nevvh1here 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?    $s$