Suppose that an object travels from onemzdycf-9v/wx 2 ;f;mw point in space to another. Make a comparison between the displacement and the distance trzf9wwvymm - f/2c;x;daveled.

  When is the average velocity of an object equal to the instantan:b 9bel;wnj+neous velocity?

  A new car manufacturer advertises that their car can go "frog+n q0n*g0gg vb7xdatz pi; ib1vf ),(m zero to sixty in 8 s". This id)f7p+;gg,it v1x bzig* a v(g0nqb 0ns a description of

  An object moving in the +x axis experiences an acceler weev0oqjv (:*ation of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to vaop bn(wgkw8 2*f4qo )99tzqthe East (+x direction) begins to slow down as it approaches a traffic light. Make a statemzww*pog( oqa9v4)qt 8 bk 9nf2ent concerning its acceleration.

  Suppose that a car traveling to wb)zb c 3i5*knthe West (-x direction) begins to slow down as it approaches a traffic light. Make a statemen5 zi) cwnb*3bkt concerning its acceleration.

  Suppose that an object is moving with a constant velocity. Make a state+;4ah wqelo:o2.82 c)cnm v6ocbow t ement concerwache 4. ;nt 28o+)bqo o:mv2ccwel6oning its acceleration.

  If the velocity of an object is zero, does it mean that the accgvp 6w6.pqbvc0u, y9beleration is zero? Support pqbwp,6.9v 6ygbu cv0 your answer with an example.

  Can an object's velocity change directiontlsfdrl*v0x1sh7k t.2g3b -y when its acceleration is constant? Support you1-xlv0t 2 trgf3ys*hbl.7k sd r answer with an example.

  Suppose that an object is moving with constant acceleratiorl9( vstk;bl.:bs +zviad/*i;rs* ob n. Make a statement concerning its motion with resp ia;*bz/vkl;is sbrs(9 :*torvd.+ lbect to time.

  Can an object have increasing speed while its acceleration is decreasjsl 5 p(vob,wg7if4) ring? Support yolbow,r)f(vi4 jg 5p s7ur answer with an example.

  Suppose a can, after an initial kick, moves up along a smoothaocd.q3h7hwdt .fs:qf4y 1 40d;yna l hill of ice. Make a statement c4da0 soh;hq:a fdlndtf.q1.yy 4wc3 7oncerning its acceleration.

  Under what condition is average velocity equal to the average m;nffx aii6a .-:q08pg;b yrsof the object's initial and ib-xr.8yfgf q:aasmpi;;60n final velocity?

  Objects A and B both start at rest. They both accelerate at the same ragye3hs:oce7 t+ m3,we* coc 5roxu-( xte. However, object A accelerates for twice the time as object B. What is the finagx3 cc hmy3eew(o:57 et*,souc-xr+ol speed of object A compared to that of object B?

  Objects A and B both.tyv2 -ucyn6 g start from rest. They both accelerate at the same rate. However, object A accelerates forn. y-c62 ytguv twice the time as object B. What is the distance traveled by object A compared to that of object B?

  When an object is released from rest and falls in the absence of friction,+f0 kt6o a,tjgmx:jex+ pll;9 which of the following is tkxj o e, j9f:plt;l6+a+0g xtmrue concerning its motion?

  When an object is released from rest and falls in the absence ofqdk/l+0 sqspi0nr6c.qi1 m2 a friction, which os 6q n0l cqqir1d.k+i/0 spam2f the following is true concerning its motion?

  Suppose a ball is thrown straight up. Make a statement about the velocity4 3y-yesmv1 upfgh*x) and the acceleration whe ey1g4)fmh*3u-pxs vyn the ball reaches the highest point.

  Suppose a ball is thrown straight up. What is its accel b*k51v svx -eg+ bm9.qetaj7eeration just before it reachea9b*-jm bv+xtqek.175 ve g ses its highest point?

  Suppose a ball is thrown straight up,.z 2.ky/ m)873ydqr1urgof m wjbvo- f reaches a maximum height, then falls to its initial height. Make a statement ab m7.yzu/3gry82 1dj-ombfwvqr.) o fkout the direction of the velocity and acceleration as the ball is going up.

  A ball is thrown straight up, reaches a maximutwr7fw6 0g osg: hoa,+m height, then falls to its initial height. Ma wo +asog,r6w 0htg7:fke 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 o49,rsn)y ni.y4rzmidb5a1fca yn q 07 f air resistance. Make a statement concerning its acceleratiy40 i.n zd bray n4,)7ncy15sqmri af9on.

  Suppose a skydiver jumps from a high-flying plzbx5 b fs3-fqq0. ihe-ane. What is her acceleration when she she reacheqq0b-3h s. ff-5izb xes terminal velocity?

  A ball is thrown vertically upward with az0 zpjs;b qk(a)o p*v6 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 hp q0bs(k6p a*vjz)o z;igher does the second ball go than the first ball?)

  Ball A is dropped from* 0-su;tfwvd l the top of a building. One second later, ball B is dropped from the same building. As time progresses, the0;w*dtlsv -f u distance between them

  Ball A is dropped from the top of a building. One secon p9g)7(,cub23gytr/ oyl u un1j obip)d later, ball B is dropped from the same buic,b3ur2)9 y)utoybu/ pgp7j1 g lnio(lding. As time progresses, the difference in their speeds

  Two objects are thrown from the top of a tall building. One is thrownt;;j kp3q j6ns1udbx;zl 6e:p up, and the other is thrown down, both with the same initiadu 6;3 sn lb;tkp:z;6 jxqj1pel speed. What are their speeds when they hit the street?

  A brick is dropped from the top of a building. A second br3h c 7ip /4yjiv,1piwiick is thrown straight downp,j7h 3ypicv1iw / ii4 from the same building. They are released at the same time. Neglect air resistance. Compare the accelerations of the two bricks.

  An object is moving with constant nonk/0+ dkojd2a j-zero velocity in the +x axis. The position versus time grak djo/dk +2j0aph of this object is

  An object is moving with constant non-zero ah1 d6yh j1c0efjx 11 :*ovnclzcceleration in the +x axis. The position ver j*:nd ex0cl6ho 1yvj1f1zc1 hsus time graph of this object is

  An object is moving with l3l;kpn-bfh7g+w fe4 ;n nbq8constant non-zero velocity in the +x axis. The velocity versus time graph b; fh n874 glk wq-fn3npbl;e+of this object is

  An object is moving with constant non-zero acceleration in the +x ax7r 3+ qwj-eqdzis. The velocity versus time graph of this objeqj+3-d 7rzqw ect is

  The slope of a posit yj /qke h(6ez:bjs(e:ion versus time graph gives

  The slope of a velocity versus time grapg26so z k o2chz2t:b/dh gives

  The area under a cur x24lgx7u ,kqqve in an acceleration versus time graph gives

  The area under a curve in a ve y3jgq3d8f *rvp7ud f8gl9c. flocity versus time graph gives

  If the position versus time graph of av+t6p128+n xc ksmeimn object is a horizontal line, the object +m 2p+tkie6c nmv81xsis

  If the position versus time graph of an object is a vertical e1pm3b,5ph2f7o 1euwgh:q x vline, the object is2,pog5p uhvmfx w7eh3 b:q1e1

  If the velocity versus time graph of an object is a horiz;vs*gv-;l tr8ujrick g*);5eoyc. qy ontal line, the object isi rkyj.c -v e*q)oy;l;8vs rcg5g ut;*

  If the velocity versus time graph of an object5aabifz 2lr.3 kf5:pl is a straight line making an angle of 30 degrees with the time axis, the objail p bkflf zr5a2.35:ect is

  An object moves 15.0 m north and then 11.0 m souyic fxk4fe4 shsvqf5511o* )zth. Find both the distance traveled and the magnitude of the displacement vecf5sef )qci 1* 441sk5 yzvxfhotor.

  A boat can move at 30 km/h in still water. How long will it take to: c-uj9t: prrt/k, nhm move 12 km upstream in a river flowing 6m k:/u9,pr rh-tn: cjt.0 km/h?

  55 mi/h is how many m/s w)x ,(7iqtxukk- k6rs? (1 mi = 1609 m)

  What must be your average speed in order to travel 350 km in/ ,-b3 svqe btm cob2eo5(b;rxn6p, pg 5.15 h?

  A runner ran the marathon (approximately 42.0 km) in 2 hours and 57 min9plom7d* un t (f(x2vz+e; +j qcgdpy7. What is e*jfxd;z2t+n pl7qo 9 u(vdmp 7(cg+ythe average speed of the runner in m/s?

  A car travels 90 km/h. How long dojzfskme/n w: )f;o.;t es it take for it to travel 400 km?

  A ly (light year) is the distance that light travels in one year. The speed of0jh k,v /zn6vz light is nz/ kv6z0v,jh $3.00 \times 10^8 \; m/s$. 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 andwbc/odpn25 e /9thdu 3 you look to the side for 4.0 s, how far do you travel during this inattentivn2t 9e uo dpc/3/bhw5de period?

  If you run a complete loop around an outdoor track (400 m), in 100 s, your avo24 fssm7inc5/ r 6hscerage veloc 2mcs64sn5is f/c o7hrity is

  A polar bear starts at the North Pole. It travels 1.0 km south, then 1.a172 )jeqx17sekiw vi0 km east, then 1.0 km north,k)ai1v2 s 77ei x1qewj 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.uvj(g/m fpyr a/u0k8 99 goy-n0 km south, then 1.0 km east, then 1.0 km north, then 1.0 km west to return to its startinggu-no8f/9rym ukv gya9(p0 /j point. This trip takes 45 min. What was the bear's average velocity?

  You are driving home on a weekend from school at 55ag9pzc6hh)*6)azoo;k gyr8j mi/h for 110 miles. It then starts to snow and you slow to 35 mi/h. You arrive home after driving 4zah6gj6yz8) kr o*op c ;g)ah9 hours and 15 minutes. How far is your hometown from school?

  A motorist travels 160 km at 80 km/h atz9s 6tqhw9(v 2m+uyge s37kbnd 160 km at 100 km/h. What is the average speed of the motorist f v s73(uehs6z2+ 9mbwgqtk 9tyor this trip?

  A motorist travels for 3.0 h at 80 km/h and 2.0sx-z nls4l)b +dz7q u7 h at 100 km/h. What is her average speed flzq7bsszn7xu4d l) +- or the trip?

  An airplane travels at 300 mi/h south f9xbjm 0h7f9uqz20k2 v0p gj uuor 2.00 h and then at 250 mi/h north for 750 miles. What is the average 2 vj pj9kum7zx9qgf 0 b2uhu00speed for the trip?

  In a 400-m relay race the anchorman (the e8;i 0p ;eddi.ia1q,xngywa8 person who runs the last 100 m) for team A can run 100 m in 9.1d ,8y;anp 0iegqiaw;e8d xi.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 coin 6;ix )-muupmes to a stop after 11 s. The car's average velocity during deceleration was 32 km/h. What was the car's deceleration while slowing down? ix-u)umn;p 6i

  An airplane increases its speed from 100 m/s to 160 m/s, at the average rate of t (cv3p)zc*pz )zz(ct*pcp 3v$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h accelerates at the rate of. zg0u1vpv +ji $2.0 \; m/s^2$. How much time is required for the car to reach a speed of 90 km/h?

  A cart starts from rest and accelerates*w/vr. :i(h ewtbk8kl 5,fqu t 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 acceleratiadnuy+mzo; x e4 s8+ bf)d7t/won obw ddtxoa)y nm e+/+;fu47z8 sf $2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial velocity of 7.0 m/s experiences a constaq,.* nz sse sl2*tz2aumr7x*h b3b 6vqnt acceleration o tn7s lxa,b2*.rbz6suvsm*3 2qz *he qf $1.5 \; m/s^2$. What is the cart's displacement during the first 5.0 s of its motion?

  A bullet moving horizontally to the right (+x direction) with a speed ofqtt.3 w5 q5iwx 522 m/s strikes a sandbag and penetrates a distance of 68.36 cm. What is the average acceleraw5w3 . xt5qitqtion, in $m/s^2$, of the bullet?

  A jet fighter plane igbl-nx6eck 14y)m,je s launched from a catapult on 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, what is the length of the catapult?x,-eje 1y4clk6b )mng

  A car starting from rest moves with constant acceleratioe+p0js9n:h bmd (km r+ fqu4o/n of $2.0 \; m/s^2$ for 10 s, then travels with constant speed for another 10 s, and then finally slows to a stop with constant acceleration of
-$2.0 \; m/s^2$. How far does it travel?

  A car goes from 40 m/s to 80 m/s in a distance of 200 m. What is its avcpv1ha s)s:u: erage acceleration?)ca v1shusp: :

  An object starts from 2avg2u, 1nysc rest and undergoes uniform acceleration. During the first second it travels 6.9 m. How far will it travel during the third seco 1ya2g,uv2 csnnd?

  An object is moving in a straight line with constant accelez6awpjwj 2.wfs uw6;4ration. Initially it is traveling at 16 m/s. Three seconds later it is traveling at 10 m/s. How far does it move dur6uw6z ; 2p jwj4ws.wafing this time?

  A car starts from rest andv, 0m7sp/kza (bs )ofx accelerates uniformly at $3.0 \; m/s^2$. A second car starts from rest 6.0 s later at the same point and accelerates uniformly at $5.0 \; m/s^2$. How long does it take the second car to overtake the first car?

  A car with good tires on a dry road can decelerate at o0 qsw 9bgg7d,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 livg65q ; (af/pvkh6a6tv- kuou ght turns green, a car that has been waiting at the intersection starts ahead with a constant acceleav;kv5qph6-/ fgo tku vu(6a6 ration 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 planetnfypds(uxt( ) sf 5u;* X where the acceleration due t 5n)(fdfs(p yt;u ux*so 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 planehh sycp6ky)m)d h0u2ctw4 86pzq 0l4 lt X whetlkh)q)cy26w46zcms 0ypdh h l4 u0 8pre the acceleration due to gravity is $1.5 \; m/s^2$. How long does it take for the object to reach the maximum height?

  An object is thrown upward wi b9w 27dzmjccwd, nbzrzhpk*pg276w20 m c4i+th a speed of 15 m/s on the surface of planet X where the09+mmc wpcc,b dz hk6 22jri*z7pzwdb27g 4nw acceleration due to gravity is $2.5 \; m/s^2$. How long does it take for the object to return to where it is thrown?

  An object is thrown upward with a speed of 14 m/s on the surface ox6td+ nav7. gvmz2w wca3 ((ypf planet X where the acceleration due to gravitg tpamwnw(6d v3a yx +c2.(v7zy is $3.5 \; m/s^2$. What is the speed of the object after 8.0 s?

  Human reaction time is usually gp8y4b y fuv-aop(af) t2i /fd9reater than 0.10 s. If your friend holds a ruler bet/2ufff(y-p 84p)y9ti av daob ween 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 a velocity of 19.6 m/i.u; buungs3nvc 300es. What is its velocity after 3.00 sb0g;s i3n0ev.c3uunu ?

  A bullet shot straight up2jar ou 9n6+xtn8yl+e sht9h9 returns to its starting point in 19 s. What is the initial s a9jxt9 h9ruye2s68n to+n l+hpeed of the bullet?

  A ball is thrown straight up with79a ij ; q mhbyn,q+v6vq7jfug 6u.3cw a speed of 36.0 m/s. How long does it take to return to its starting pointqihqju.b7n;,q7+ a 3vmyw ucf6vgj69?

  A ball is thrown downward from the topaqux c1yho ;*; of a building with an initial speed of 8 m/s. It strikes the ground after 5.7 s. Hoq1;*a;ch oxyuw high is the building?

  A ball is thrown straight up with a speed of 30 m/s. (only fill in numer)t swm- nui49g clu/s5ical value in the blankscsgu4/ n5)m9wlit su-)
(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 w)xo r+rn 5p6tlith a speed of 40.0 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 6 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 6.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what i+1i4rs,ndx g lx99v nkpyd)2n s the velocity at t = 1.0 s?

  In Fig. below, what is the velocity at t =nl9 lj. h+y9 s.+lzahi 2.5 s?

  In Fig. below, what is the velocity at t ,y4d6 jkon pu+= 4.0 s?

  In Fig. below, what is the velocity at t = 5.5 s? 9ee)6yhcn2hruoz 96 v pzl//r

  In Fig. below, what is the average kke6,9k.ar e s4filk;velocity from 0 to 4.0 s?

  In Fig. below, what is the average vby,,1hgcck9i)fm m1e yvkp;) s-1ffyelocity from 0 to 6.0 s?

  In Fig. below, what i61j jv, (dq;e:l kz 1rvrjss h/)qj9gbs the acceleration at 1.0 s?

  In Fig. below, what is the acceleration(85ccob33wrysf :nmk7d vo/u at 3.0 s?

  In Fig. below, what is the average acceler9 jg l8orqu7j1tc3:z tation from 0 to 5.0 s?

  In Fig. below, what is the average acceleration f)3c/gh mqxsqqk;x6 02vez c0wrom 0 to 8.0 s?

  In Fig. below, what is the displacement from 0 t ud5(da3(swaoj* 4a4xi2bxi bo 8.0 s?

Does a car speedometer measure speed, velocity? {spx2w380vg kzm peed|velocity}

  An object can have a varying speed if its velocityg7pi2vm jcj,1o87e ts is constant.

  The velocity of an object can be e gb-u(1h)z**tv9 fkfzl)w isnegative when its acceleration is positive.

  If one object has a greatpzw ,* +mj*oqj3h/l1:nwr xih :7yawqer speed than a second object, the first must have a greater accelerati*:hxao w,j i:j3 ww7py+ zm1*rlq/qnhon.

  Two cars emerge side by side from a tunnel. Cb de jmhcer*1267ok 9aar 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 increasinvqd .ga2/xv//v.da)td znz 1rg in speed as its acceleration decreases.

  A baseball player hits a foul ball straight up into the air. It leaves8.pq8v uh7xi/ z:fqhp the bat whvq.zqh 7p8 x/fp8u:i ith 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 ri ils7l6. d)0rqi5av acceleration, how does ii 5lisrvrqd l67 0)ai.t change if air friction is ignored?

  As a freely falling object speeds u7jxz)-(vh0eie naz86- .u an.ijnnlo p, what is happening to its acceleration, how does - el iaj(-i.6zj)nu08n.v7aonzne xh it change if air friction CAN NOT be ignored?

  An object that is thrown vertically upward will 9tym.p3v rnl5inp b9wd f:1:mreturn to its original position with the same speed as it had initially if air resistance iy:n lntpmrf :dbp9 1i5v3.9 mws negligible. If air resistance is appreciable, how will this result be altered?

  An object can have zero g 1mldjj2pc/)velocity and nonzero acceleration at the same time.

  An object can have nonzero velocity and zero acce lih*br3j8qn9 leration at the same time.

  An elevator moving from the second floor to the fifth floor making no stops alon verrqg tqw, e xbo0v5/j;e;3gx6mn 4,g the way hq,txev5o q4;0wv m/g er;gj er3xbn,6as zero acceleration all the time.

  A rolling ball moves from xgln 2 6muimtullnrvh2 (,:(9 d.l c)n$x_1=2.4 \mathrm{~cm}$ to $x_2=-8.1 \mathrm{~cm}$ during the time from $t_1=1.6 \mathrm{~s}$ 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 $t_1=-4.7 \mathrm{~s}$ is at $x_1=2.1 \mathrm{~cm}$ and at $t_2=3.4 \mathrm{~s}$ is at $x_2=8.1 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete laps around a quarefdft xkhg gb6deq7*l9b 7 4txgj7- uh-z68a 9ter-mile ($1 \; mile = 1609 \; m$) track in a total time of 8.4 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 linevxpc2+ xk)ci9, moving 103 m away in 9.6 s. ki +c29vpx)xc It then turns abruptly and gallops halfway back in 4.7 s. Calculate (a) its average speed  (数值)  $m/s$ and (b) its average velocity  (数值)  $m/s$ for the entire trip, using “away from the trainer” as the positive direction.

  A car accelerates frl k9w b+sxea)08dti 6rom $12 \; m/s$ 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,n)ucy*.pib6 bc7 gfd $21 \; m/s$ to rest in a distance of 65 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reach a svpt)fb,foa m-7 ay*mq. s-qc0 peed of $27 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $2.6 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinter can burst out of the blocks to29iw /r +qjenc essentially top speed about 9cej +i wqr/2n$11.2 \; m/s$ in the first 14.0 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 uniformly from atq 1f dnkdo6 ll,: 9a0pfc,w *5bphx1q speed of $17 \; m/s$ to rest in 5.76 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 onfjan9j7mvn el mj:4 6- the highway. Assuming a deceleration of n v:46jajnj-7lef mm9$7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck goin7(a zsw b6f.a-sz9xqhzn 7w ;ug $25 \; m/s$ 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 10,0:uu4ongw7oh , zh;el3jlfv 9 ,00-m run in less than 30.0 min. After exactly 27gzh e wfol vu:j4;79, o,h3unl.0 min, there are still 1100 m to go. The runner must then accelerate at $0.20 \; m/s^2$ for how many seconds in order to achieve the desired time?    $s$