Suppose that an object travels from one point in space to another. Make a cojgq: ;bkih)/fmparison between the displacement and the dist:gih ;/kb)qfj ance traveled.

  When is the average velocity of an object equal to the instantaneous veloci 9r3tqz1gywa m.2owl;f9 k0outy?

  A new car manufacturer advertises that their car can go "from zero to sixty in v+ehd s+cw 8k)8 s". This is a description of8ksd+ hwv) c+e

  An object moving in the +x axis expg)l p3xfm 8;.q1eproweriences an acceleration of $2.0 \; m/s^2$. This means the object is

  Suppose that a car t p/b a1qw-jmf*raveling to the East (+x direction) begins to slow down as it approaches a trj/*wm-qp ba f1affic light. Make a statement concerning its acceleration.

  Suppose that a car traveling to the West (-x direction) begins to d2wrq kv.kr w5ukl2 3dgt9s/(b9b( brslow down as it approaches a traffic light. Make a statement concernindbsr 3 2 w(29uvkwb .(9rr/dk klgtbq5g its acceleration.

  Suppose that an object is moving with a cons3w q ix29yy)jbtant velocity. Make a statement concerning its accelerationy 9jy 3w2bqi)x.

  If the velocity of an object is zero, does rclo wafy :3h 1u+z4 w*ev) rl3lv0y-git mean that the acceleration is zero? Support your4)l*f0:g3 yw vlzu -rl3+y1aw orcvhe answer with an example.

  Can an object's velocity change direction whrr.cxearfi ,:yr 98 l4en its acceleration is constant? Support your answer with an examprr y,e:8c4a9fr xlr. ile.

  Suppose that an object is1-(+ivanirf;u yjv r8 h/n4l h moving with constant acceleration. Make a statement concerning its motion with respijlyh v r4h+u 8(1aif;nn /rv-ect to time.

  Can an object have increasing speed h8bx*x7 azxcu,92ur d while its acceleration is decreasing? Support your answer wi a9u2hr u xzdx8*bcx7,th an example.

  Suppose a can, after an initial kick, moves upr s5l l.0jy,igbzjnjsr 29k+5 along a smooth hill of ice. Make a statement concerning i5jkjil 25ylrs+nz ,j9g0bs .rts acceleration.

  Under what condition is averemu papy( pra9zdd7::th(l/ g qja7(3age velocity equal to the average of the object's initial an7apap3z d9 hp a:l(((:m qdg7etr/j yud final velocity?

  Objects A and B both start at rest. Theysx +6k6*l p tece9bm;)rmcrr3j;v ,ng both accelerate at the same rate. However, object A accelerates for twice the time as object B. What is the final speed of object A compared *exnmcgp b +m)r lk;v,9ej6rt r;s c36to that of object B?

  Objects A and B both stare.h cjzusf3:.dq)b/qt e;1 fx t from rest. They both accelerate at the same rate. However, object A accelerates for twice the time as qf).j.t3dc :qsf1hxbeu/; ezobject B. What is the distance traveled by object A compared to that of object B?

  When an object is released from rest andu1- xjrkh/ ytsi0w 9-:feg-q9ztpw*g falls in the absence of friction, which of the fo--w9ut0f y*g/9 r -se:xigtj zq1whpkllowing is true concerning its motion?

  When an object is released fro b7 nojnf*c0iigdxr.b0n, 4r-m rest and falls in the absence of friction, which of the,dfn0xb0n.iorr -n4b7j c*gi following is true concerning its motion?

  Suppose a ball is thrown straight up. Make a statement abo gf 5o:xv-0d2x5w wqvcut the velocity and the accelera-0:wv2 vdg 5qf cw5xxotion when the ball reaches the highest point.

  Suppose a ball is thrown strai(lc9 fpomk 4 rim:4,mo3f)kclght up. What is its acceleration just before it reaches its highem cf3pm49(,ok4k)c f lmril:ost point?

  Suppose a ball is thrown straight up, rea.1o9cfb f nkzh:dl ;v;d : g6aax,3jpbches a maximum height, then falls to its initial heig:fc,a1kdp xfga;b d o39;z :j.b lhv6nht. Make a statement about the direction of the velocity and acceleration as the ball is going up.

  A ball is thrown straight up, reaches a maximum height, then falls to its idgg)5:b o(seinitial height. Make a statement about the direction of the velocity and acceleration as the ball(d 5goe:gbi) s is coming down.

  Suppose a ball is thrown downward in the absence of air resisto5kwgpucb9-8y5y v c*g0o bh6ance. Make a statement concerning its acceo5vybu* 9b 6-wo0kg c h8pc5ygleration.

  Suppose a skydiver jumps from a high-flying plane. What is hez+sms qj 3bauu9aa;8 3r acceleration when she zj 3aq +9aauu;8bm ss3she reaches terminal velocity?

  A ball is thrown vertically upward with a speed v. An identical seco4 v:r,im im-dmnd 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 thi, iv :-mrdmm4e second ball go than the first ball?)

  Ball A is dropped fro8bfjs1iq;c 8.y+ eugop 1(n tgm the top of a building. One second later, ball B is dropped from the same building. As time progresses, the distance between tyst. egbo nju(1c1f pqi8g 8+;hem

  Ball A is dropped from the top of a building. One second later, ;) ;d(,wh 5mffyymee6q/v zfrzl/n0cball B is dropped from the same building. As time progresses, the difference in their speeds6/ zyve5hcf enrf;(ld)mmzy w/q0, f;

  Two objects are thrown from the top aw g0)*8adjb(,oighiof a tall building. One is thrown up, and the other is thrown down, both with the same initial speed. What are their spagodg0i(ji)ba wh8, * eeds when they hit the street?

  A brick is dropped from the top of a building. A cor33ue. s9epsecond brick is thrown straight down from the same bur e3s9c3p oue.ilding. They are released at the same time. Neglect air resistance. Compare the accelerations of the two bricks.

  An object is moving with constant non-zero velocity in the +x axistu+y-rrmw3bi,ph f j)r z47c,. The position versus time graph of thizt7 ,-y4u+pbmj )r3c rw rf,his object is

  An object is moving wis 4jq w2s yb1se8d6q8lth constant non-zero acceleration in the +x axis. The position versus time graph of this object i214ws8 ys8sebjq q 6lds

  An object is moving with constant non-zero vek - j7owf)bpmw 0zmyb77 rd+d+o ,jd1nlocity in the +x axis. The velocity versus time graph of this object7717dbfko,dnzwm )0 yj-+pdmr oj+b w is

  An object is moving with constgkb g8 y81w62b;sc4jr2zz yckant non-zero acceleration in the +x axis. The velocity versus time graph of thkk gy8b812cw gcz 2br6 ysj4z;is object is

  The slope of a position versu5i:naq9* osm mbl felun 22g45s time graph gives

  The slope of a velocity versus timejfno01srasg -54z,n c graph gives

  The area under a curve is 84lqcc n4+evn an acceleration versus time graph gives

  The area under a curve in a velocityt07q8eqik 3o m versus time graph gives

  If the position versus time graph of an object is a horizv;3j- q6 (riug/rolvq ontal line, the object islr- 6io vv;gqrju/q3(

  If the position versus time graph of an object is a vfbm x (yksb88(l zh.8nertical line, the object iszm. 8 lbh(fs8yk8nb(x

  If the velocity versus time graph of an odfltdue + yy11 bp3s)66uzyn0 bject is a horizontal line, the object ie16fn3luy ut d)0d1 zy6 sbyp+s

  If the velocity versus time graph of an obje e++h .bdf yhy,5vjwj8ct is a straight line making an angle of 30 degrees +jh.bfd yhew58y,+v jwith the time axis, the object is

  An object moves 15.0 m north and then 11.0 m soutx.g/aaxc e8 q4h. Find both the distance traveled and the magnitude of the displaceaqgxc e4/. 8xament vector.

  A boat can move at 30 km/h in still water. How long will it take td2/ f qpz*g*vyw,ie o5o move 12 km upstream in a river flowing 6.0 *,wig q fd2oyv*ze/ 5pkm/h?

  55 mi/h is how many m/s? (1 mi = 1609 j f+*1cahm zt2-s i(8v. ow r3aeue+nvi*ml a9m)

  What must be your average speed inzu5u*.: c ev68p kvalh order to travel 350 km in 5.15 h?

  A runner ran the marathon (approximately 42.0 km) i9 l-ntv/xbtp*o/fbj pls9 3 8pn 2 hours and 57 min. What is the average speed of th89j- 3* bf/ xvn tp/9lplpbsote runner in m/s?

  A car travels 90 km/h. How long does it take for it to travel 400 k3/xgmbv;561(d. lwlt a zponvm?

  A ly (light year) is the distance that light t3yecq-m t.+ jp)u3jf.l3nocy3s + iwzravels in one year. The speed of light iszj jc+c pyu-e y)+i 3swmlon333ftq.. $3.00 \times 10^8 \; m/s$. 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/jvkcgk6 i g,( straight road and you look to the side for 4.0 s, how far d jcgk/k(6i gv,o you travel during this inattentive period?

  If you run a complete loop around ,r9 ip+.c a po1f)y6rkmdt8ni an outdoor track (400 m), in 100 s, your average 9fk 6.ti 1pdro,mycpa8in)r+ velocity is

  A polar bear starts at the North Pole. + 7ln:hwk,2 obf mad7tIt 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 poih7okblm ,d7f + n2:atwnt. This trip takes 45 min. What was the bear's average speed?

  A polar bear starts at the North Pole. It travels 1.0 km south, ,xbm.tl( c/kt7 :anxtthen 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 bttxal m/cn,(7 :kt.xr's average velocity?

  You are driving home on a weekend from school at 52 ,) pvwcavb c9l f)l)m-;uxqm5 mi/h for 110 miles. It then starts to snow and you slow to 35 mi/h. You arrive home after driving 4 hours and 15 minutes. How far)cv)u,9flp2)mx la ;vwbmc- q is your hometown from school?

  A motorist travels 160 km at 80 km/h and 160 k ll50i/ s1blqmz+btal)nuc-p cc6 3(zm at 100 km/h. What is the average speed of the motorist for this tribzc+pt) 0-ncbllu5/3 cs 1aql(z l6im p?

  A motorist travels for 3.0 h at 80 km/h and 2.0 h at 100 km/h. What is h0hhbmnohq9 f v2f:9-der average speedoq hh-h9n 0:f9b v2fmd for the trip?

  An airplane travels at 300 mi/h south for :y vkspwt1 tf j,0mt: pepdk*d/-4r)f2.00 h and then at 250 mi/h north for 750 miles. What is the average speed for the trf 0:*-ppmfv )rwsttkd4/etd :jy,1 pkip?

  In a 400-m relay race the anchorman (the person who runs the last 100 my4 e9 b5n40yhh7i fpsa) 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 ra0bh 45fp97sy 4 ynaheice?

  A car decelerates uniformly and comesz7s ., q*5e(nqzflnql to a stop after 11 s. The car's average velocity during decelerationz elqn7sq 5qn*lz. ,f( was 58 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 rate ror/ +o - kz/-m5gaahiof /- ia5/rmk h r-gazoo+$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h accelerates at the rate fk+o (;b w8.spnc-sflof $2.0 \; m/s^2$. How much time is required for the car to reach a speed of 90 km/h?

  A cart starts from rest and acceleratd5) urb 8m;bcc22rcw wnv)3eies 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 acceleraj(da,u iawo5p8h u/a:tion of8i uwju5p/( dh:,ao aa $2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial velocity of 4.0 m/s experiences a constant acilmvg;p*/ mhkdu ,uf it:a1i08t 6b/jceleration o;vli1 68uimuda0 jhit *,tp:/bkg/ mff $1.8 \; m/s^2$. What is the cart's displacement during the first 9.0 s of its motion?

  A bullet moving horizontally to the right (+x direction) with a speed ofge ppv61,bp0p-f fg( sdi1/du 554 m/s strikes a sandbag and penetrates a distance of 21.19 cm. What is the aver1 - (gpspdf0vp1b,gepfud/ 6iage acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is laup3aj kk*l l*y2nched 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 lengjlypka *k23l *th of the catapult?

  A car starting from rn*f3fod:x kgm1 :c 6e1uoufv;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/s5chv p dpsqiod0i21pnb9 *yi..:pdz6f1 h cp; to 80 m/s in a distance of 200 m. What is its average acceleration?iv on*: ppz p12. didbdc9sp6 c.qfy15i;hp0 h

  An object starts from rest and undergoe g3eaz58 .*4jdg b5z:xqwleyi s uniform acceleration. During the first second it travels 7.9 m. How far will it travel zy.5*xdqwij 8el :ag3 eg 54bzduring the third second?

  An object is moving in a straight line with constant acceleh8 7xf*7atwbyt fg)( wration. Initially it is traveling at 16 m/s. Three seconds later it is travelingt7xa tw *g h()7yf8bfw at 10 m/s. How far does it move during this time?

  A car starts from rest and accelerates uniformly gu9v+uzmh.u bw :e4lfa/25ri 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 de triqa1oy9kfm(-h (9rcelerate 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 lig*fne )o cd.rx,ht turns green, a car that has been waiting at the intersection staorx)ndf ec*.,rts 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 m/s ov)t-am nyo jfr1+ hcq;x3,p f)n the surface of planet X where foa; f c 3tx)v,) hqrny1mj+-pthe acceleration 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 m/s on the surfag ge;cr fqflhn.-88 o-ecc8 (nce of planet X where the acceler-gr8 ocnlgecf8 ;8qc -f(h. neation 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 w6aw4qv- qk:s-u svxhp d3 ew69ith a speed of 15 m/s on the surface of planet X where the acceleration due to gravi hv:9-p sksdw6e3-vq 6xq4w uaty 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 upwazy8fu eqwr8r,/ x*o:9qum *tv rd with a speed of 14 m/s on the surface of planet X where the accelerattruqz*8qoyfx8 r :m /v wu*9e,ion 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 ),ez9g 6vix4rwnrbt -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 fall before you catch it?z-rnxgt )v,r6 iew94b

  A ball is thrown upward at a velocity och3k+l )mxe vzkidr*y(rf55t*g r+*of 19.6 m/s. What is its velocity after 3.md+ktihzxgecrrf*( vr) oly3 k+ 55**00 s?

  A bullet shot straight up returns to its7aylb : ..gp;o.zaswr starting point in 16 s. What is the initial speed of the bullet?.y.oa :z.;b7 rpwlsag

  A ball is thrown straight up with a speed of ag;l() y q7qri36.0 m/s. How long does it take to return to its starti g(li7qqr);y ang point?

  A ball is thrown downward from the9srj8 r .trvr5 top of a building with an initial speed of 19 m/s. It s5rtr r8rv 9.jstrikes the ground after 5.0 s. How high is the building?

  A ball is thrown straight up with a speed of 30 m/s. (only fill in numl)bj.:w8,5wbc+ y xaker,)s vwta (uuerical value in t8wbuxwkl w(ets5a u+ . jb,v,))cr:ayhe 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 vwq2k p 7)wfh3;c3o jcspeed of 42.7 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 3 seconds later.  (数值)  $m/s$
(e.) Determine the time at which the ball pass a point 7 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 7.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what is the velociggx2lt,r/x9 g +c a7gzae9k-uty at t = 1.0 s?

  In Fig. below, what is 1df*ec v9h4t *chpsw,f6 w:lm the velocity at t = 2.5 s?

  In Fig. below, what ima/ 2z t-gwq 0c;ni3cgc7as v6s the velocity at t = 4.0 s?

  In Fig. below, what is the velocity at t = 5.5 6z rkm-9ov4t:h+ a czds?

  In Fig. below, what is the avlm w) ;i8lmo9mbk0 /oxerage velocity from 0 to 4.0 s?

  In Fig. below, what is the averajx4ccw zr2n(a.j6up3 nrc/ i/ ge velocity from 0 to 6.0 s?

  In Fig. below, what is the acceleration at 1.6kt5*8erymmq ;:hi 2k*e hzlg0 s?

  In Fig. below, what is the acceleration at 3: qulhae -7)l cp)4ume.0 s?

  In Fig. below, what is tqr* *gus j.n4o(:zlq+5l zilyhe average acceleration from 0 to 5.0 s?

  In Fig. below, what is the average acceleration fromas1)5 axp2ra3i ae5 ez 0 to 8.0 s?

  In Fig. below, what iiy/o2v3h0 z qq wmr pc,mt;9,bs the displacement from 0 to 8.0 s?

Does a car speedometer measl(6r u z29.)im.p smn elmlpy.ure speed, velocity? {speed|velocity}

  An object can have a varying speed if its velocitypy dtsx1(4o5l is constant.

  The velocity of an object swyzn, w+g7o9can be negative when its acceleration is positive.

  If one object has a greater speed than a second oqt nye;w;4zm680k jv yf/f. vabject, the first must have a greatertf ; .mvyy;fvew 4ak 6n8/jq0z acceleration.

  Two cars emerge side by side from a j45b- azcfv .pb0;bmwtunnel. 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 increasingtthycwr5mdw, , 7l/f9 in speed as its acceleration decreases.

  A baseball player hits ,x4ffwovojz0ng ,ji tw 1q-21 a foul ball straight up into the air. It leaves the bat wz,0foiqg-o2ntwv f 4, j1 1xjwith 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 objectfetc1p.dm8 ga la;l 54 speeds up, what is happening to its acceleration, how does it change if ;d8m a4all5pet f cg.1air friction is ignored?

  As a freely falling object speed 5tn,6avs ;0hyyf*atj s up, what is happening to its acceleration, how does it changen,6ya5t0h ta*sf;vjy if air friction CAN NOT be ignored?

  An object that is thrown vertically upward will return t: i4(y ik b9:su alruy(;ylg,go its original position with the same speed as it had initially if air resistance is negligible. If air resistance is appreciable, how will this r ;y9iu aily:gb(r :u(4,sl ykgesult be altered?

  An object can have zero velocity and nonzero accel2rkwyac)b2 uxk0 08z 6t wrej eb+p:c5eration at the same time.

  An object can have nonzero velocity andng0vay 2x d2vsm-1z:15r6ac ecmxj;f 80l jyt zero acceleration at the same time.

  An elevator moving from the second floor to the fifth floor making nurcgr v1a )+ph:d+ ssu8v /6amo stops along the way has zero accelerat8 a +mhrcr)6vua:1s+vp/dgusion all the time.

  A rolling ball moves xwvy1b1p8n f0xbu 7.o from $x_1=2.6 \mathrm{~cm}$ to $x_2=-5.1 \mathrm{~cm}$ during the time from $t_1=2.1 \mathrm{~s}$ to $t_2=5.2 \mathrm{~s}$. What is its average velocity?  (数值)  $cm/s$ (only fill in numerical value please)

  A particle at $t_1=-2.7 \mathrm{~s}$ is at $x_1=2.8 \mathrm{~cm}$ and at $t_2=3.8 \mathrm{~s}$ is at $x_2=7.6 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete laps arou)km4 (hp :fdbnm7f;no nd a quarter-mile ($1 \; mile = 1609 \; m$) track in a total time of 9.8 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, b2lc7dcj1 / nv8qft6emoving 104 m away in 9.4 ln f6cebvt /j7dc21 8qs. 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 from b9.2xerr gsf0 $11 \; m/s$ to $24 \; m/s$ in 5.8 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 fromp p2x f t,ce0bg9(frw, $22 \; m/s$ to rest in a distance of 84 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reau 4c qwrjkan s9:1:(t. ndkm(ach a speed of $31 \; m/s$ 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 the zeov r99ws3u ,5zn 6ikblocks to essentially top speed about zuws5 kio z9nv369er, $10.8 \; m/s$ in the first 14.7 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 dgz/wb *-yz 2w:nq ue+a speed of $19 \; m/s$ to rest in 5.36 s. How far did it travel in that time?  (数值)  $m$

  In coming to a stop, a car leaves skid marks 92 m long on the hya:q2.y1so8*hhtr u0 nk va5b ighway. Assuming a decelerat tr.q8akab 1h02 y5nyvosuh* :ion of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truaphw6ze .x) t fy/sm5+ck going $25 \; m/s$ 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(q 1ijpeps;x9 30.0 min. After exactly 27.0 mi x1(;i 9pjeqpsn, 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?    $s$