Suppose that an object travels from one poinhpd-sw tf4ac;:;ba-3) k ajh rt in space to another. Make a comparison between the displacement and the distance trawrjc;;-hbh pstaa 4f):3akd - veled.

  When is the average velocity of an objec x /h+ hhbtbyn+/+8zyvt equal to the instantaneous velocity?

  A new car manufacturer advertises that their car can go "from zeroomjxnnk*e)7t c6l-f 5fg mqx0;/y-m o to sixty in 8 x7mx- ofnn- j/t 6efq5m) k*0 ;ocmlygs". This is a description of

  An object moving in the +x axis experiences an accelerati),t :;fjg jg7trjgw8mx8pq c1 on of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to the East (+x direction) beginsspitk9-qunja u9)/1 u to slow down as it approaches a trafap9sk1)qu / t ui9jun-fic light. Make a statement concerning its acceleration.

  Suppose that a car traveling to the West (-x direckg7* jow+ resaz8o6 j4ku-u2qtion) begins to slow down as it approaches a traffic light. Make a statement conc6 zowka+4 q-2rjg*je 8oku7suerning its acceleration.

  Suppose that an object is moving with a constant velocus 6ew;q 595rz q9iqqiity. Make a statement concer95riizu s69q ;q5e qwqning its acceleration.

  If the velocity of an object is zero, does it meq-v zyw+;cet ww2j/2eskbo ;(an that the acceleration is zero? Suppyebc;zwvo/( -kwjtw2;+2q esort your answer with an example.

  Can an object's velocity change direction when it2i. vyul rfjllv.9;v 1s acceleration is constant? Support your answer with anrl.ivv9 lfvl 12 .y;ju example.

  Suppose that an object is moving with constaoyi47go- n 9zpnt acceleration. Make a statement concerning its motion with -i9g7ynzpo o4respect to time.

  Can an object have increasing 87z5v55s:qsjcoatg8 vun(r ma 9jt(vspeed while its acceleration is decreasing? Support your answer with an example.mta 8 qv5zv 8gcjsj (9a7v(5rnto:s5u

  Suppose a can, after an initial kick, movt,4,3em 9cslx sf hphaih +6h0*)c(hfnfiw 9wes up along a smooth hill of ice. Make a statemens lfcw cph,3 hhi+6 mt9(fxns4iw fe9,h)*ha0t concerning its acceleration.

  Under what condition is average velocity equal to thi,x0/e do1 kbxtc5hfl, sw*:ve average of the object's initial and finaw*c,sevxt fobk :l x/ 5i0d1,hl velocity?

  Objects A and B both start at rest. They bg(9d(+ n fd;s yqv7lpzoth accelerate at the same rate. However, ob+d(z fv;l 7 (gqsd9ynpject A accelerates for twice the time as object 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 the sam)18tugz at1 yoe rate. However, object A accelerates for twice the time as object B. What is the distance traveled by obj uo tgyat)8z11ect A compared to that of object B?

  When an object is released from rest and falls in the abse8,o un*3mog8dk + cowxnce of friction, which of th8,n+*mkoc8odwo 3 xug e following is true concerning its motion?

  When an object is released from resdu; :n+pd9) dl/2sr /hildte aae z36ft and falls in the absence of friction, which of the following is true concernii) st:a3pln;af 2de6d9lzrd h// u+deng its motion?

  Suppose a ball is thrown straight up. Make a r*gx m ;q(y9np statement about the velocity and the acceleration when the ball reaches the highest poinqrp*mxy g;(9 nt.

  Suppose a ball is th z2zi1;pkutpsht/95t f4d ) lcrown straight up. What is its acceleration just before it reaches it5udf /ztzsih 4p9;kp)ct l2t1 s highest point?

  Suppose a ball is thrown straight up,-* sfec .stfi. reaches a maximum height, then falls to its initial height. Make a statement about the .c* fftsis-.e 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 initiiv rv(q29 eudrb -g7ek;q-5uhal height. Make a statement about the dikr-v(brq h2 q e u-u7v;dge9i5rection of the velocity and acceleration as the ball is coming down.

  Suppose a ball is thrown downward in z)g(vc57egw*w i3n e qthe absence of air resistance. Make a statement concerning its acceleratio3)v eqg *enwigz57 (cwn.

  Suppose a skydiver jumps from a8nob 9)1m;yav/s5pifdhdel2 a(f g5 f4md6hu high-flying plane. What is her acceleration when she she reaches term f(g1 d5fih/ebo8asn vdl; m 5p)f6ay24umdh9inal velocity?

  A ball is thrown vertically upward with a speed v. y57hmof0u91kzor 8 hen( 7sbt An identical second ball is thrown upward with a speed 2v (twice as fast). What is the ratio of the maximum height of the second ball to that of the first ball? (How many times higher does the second ball go than the first ball?)(58kmhfon tzbrh u oey0 7971s

  Ball A is dropped from the top of a builat7y2 jhkw+6uding. One second later, ball B is dropped frou2h76akj+t yw m the same building. As time progresses, the distance between them

  Ball A is dropped from the top ovxu k:8 1gbetp.s7 a6ef a building. One second later, ball B is dropped from the same building. As time progresses, the difference in their 1up7k a 6sxe.v :8tebgspeeds

  Two objects are thrownmylrl g;z s65) from the top of a tall building. One is thrown up, and the other is thrown down, both with the 5rg)sy zl6 m;lsame initial speed. What are their speeds when they hit the street?

  A brick is dropped fmfu v vt0e1mx1;cs p(j5-.lvaw2 cy,grom the top of a building. A second brick is thrown straight down from the same building. They are released at the same time. Neglect air resistance. Compare tx f 5w 1ua-v.lvm cj2ts, 0e(;yvmgpc1he accelerations of the two bricks.

  An object is moving with 4i- 4 7hw t qh l2utsg*af+s3:qhs5zugo3c 7ciconstant non-zero velocity in the +x axis. The position versus toq4 gsst wgu5falih c3q4s:37c+z ui*7t-2hhime graph of this object is

  An object is moving with constant non-zero acceleratixj-ajiwaf*x( puca tq-o- *40on in the +x axis. The position versus time graph of this o( w4*xp*oj i-c-xqa- ja taf0ubject is

  An object is moving with consld-j4b x-8r57 sey15r7hcysd6nths itant non-zero velocity in the +x axis. The velocity versus ti7lj ey rcith7sd6 n sb548 d-1rxysh5-me graph of this object is

  An object is moving with constant nonys-1 -hn3wfk- lpqrqodf0g *. -zero acceleration in the +x axis. The velocity versus time graph of th--o*d gl-. np0whqrfyks3 q1f is object is

  The slope of a position versus t- ybuhbg 7/5pm.f 5g6y-zci osime graph gives

  The slope of a velocity versuctbn6qvb td: ( aba5,)s time graph gives

  The area under a curve in an acceleration ve:e)zhj++ zxlzds +9god7vt*brsus time graph gives

  The area under a curve in a velocity versus njdjx8jxfeb .l. .4.r tivu26time graph gives

  If the position versus time graph of an oe1i e;q/1 msh 2(h wtmf6 hooietlo096bject is a horizontal line, the object is90ho(ow im/ oi ;t1f 2tqle66smhh ee1

  If the position versus time graph r1*.e0+ /d3tcfnudzfhoa0 l g of an object is a vertical line, the object isrdd0l.u*e/hz+3f 0t g c1anfo

  If the velocity versus time graph of an object is a horizontal line, the object afa;bja;;bb jl v;)aw ,f,g ls;kb5 g2is;2ag ,abj5,;fj alb;a;l fg;sv) bkw b

  If the velocity versus time graph of an objeiioke-/io6 a4ynx/) v ct is a straight line making an angle of 30 degrees with the yoiaxe-)/o/6ik vn 4itime axis, the object is

  An object moves 15.0 m north and then 11.h or1pexy7 exkb:;9-v24ex.hncv al- 0 m south. Find both the distance traveled and the magnitude of thh n.lae- 9;eoxk:xr27 hc1bvvp-x4ey e displacement vector.

  A boat can move at 30 km/h in sj17/sp*sah,kk do9 ol till water. How long will it take to move 12 km upstream in a rivek,7d9oso1 *p askh/ jlr flowing 6.0 km/h?

  55 mi/h is how many m/s? (1 *k ctytu++ovxluw c13,zgg *+mi = 1609 m)

  What must be your average speed in ord7l9 1k7-jfcbf ikd4go er to travel 350 km in 5.15 h?

  A runner ran the marathon (approximately 42.0 km) i4:i gvl9r:e9g ql2 u 9l5brlkkn 2 hours and 57 min. What is the average speed4 : krl:9e9ql il bgl9v2uk5gr of the runner in m/s?

  A car travels 90 km/h. How long dlj s4 t)z:4+qj/lgean oes it take for it to travel 400 km?

  A ly (light year) is the distance that lighl;b(1q.dk(-tztlw xm t travels in one year. The speed of light i -tk.(wbq lmdl1( ;ztxs $3.00 \times 10^8 \; m/s$. 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 sir2pcx j 5nc-kfhyin(87 aa:*ude for 4.0 s, how far do you travel during this 5:punc(i2 ca h-n *j7krfa8 xyinattentive period?

  If you run a complete loop around an outdoor traw99zr d(y;66 t o(utye1f2ukvg tz a4fck (400 m), in 100 s, your averauk vfz ( t uz4g wdf9ota9et6ryy261;(ge velocity is

  A polar bear starts at the North Pole. It travels 1.0 kg+k5g a3ppkc2 w;uoz3m south, then 1.0 km east, then 1.0 km north, then 1.0 km west to rewk; +3o 2upac kg5z3pgturn 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 1.7 w(1ir gum333zs .leow: yfey0 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'sro.33e :i 3 mwseywg(y17flzu average velocity?

  You are driving home on a weekend from school at 55 mi/h for 110 miles., zlt3e; zau5ic;p,vj It then starts to snow and you slow to 35 mi/h. You arrive home after drlej5ctzap,v3;i ; , zuiving 4 hours and 15 minutes. How far is your hometown from school?

  A motorist travels 160 km at 80 km/h and 160 km3uiiar .e sy7. at 100 km/h. What is the average speed of the motorist3.yai7is .ur e for this trip?

  A motorist travels for 3.0 h at 80 km 1wqyr*a5x)br/h and 2.0 h at 100 km/h. What is her averageaw)*ryr5 xbq1 speed for the trip?

  An airplane travels at 300 mi/h south for 2kfuqivx *m2 m6(o1b: m.00 h and then at 250 mi/h north for 750 miles. What is the average spee6u1 m2mfi*vox qbmk(:d for the trip?

  In a 400-m relay race the anchorman (the person whoil ttp6.hxo7.g tar - ;9ifhb2 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 tior2h7i b 9.t-6ft ;pgah x.lteam A runner not lose the race?

  A car decelerates uniformly and comes to a stop after 8 s. The cal, 3vmwlg /ur6ajh2l8r's average velocity during deceleration was 61ulwlhl2rg m, j83a6 v/ km/h. What was the car's deceleration while slowing down?

  An airplane increasek//jhb6gpf r;,pbsz(es . ;d bs its speed from 100 m/s to 160 m/s, at the average rate of b6 pzp/s;s.ghkj eb/fbrd; ,($15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h h,/wqvmpi1fe6hf 4kwg (nwsi(n 7r82 accelerates 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 and acceleratep7.b nl2 zam6c*mq9odmgh;/ gv+z q3 os 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 accelerat-m rsd 9s0hpfe1go)e1 ion ofdrfse)09 gm1eh-o p1s $2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial velocity of 2.1 m/s experiences a co83fu//,po0l+ lwbvyiy b ugs9 nstant acceleration of ou ypl3f ,s+/bgulwi8yb90/v $4.4 \; m/s^2$. What is the cart's displacement during the first 9.0 s of its motion?

  A bullet moving horizontally to the right (+x direc 9m9h/xwf. c.ncx qtv7tion) with a speed of 283 m/s strikes a sandbag and penetrates a distance of 16.40 cm. What is the atx /.vwfcxm 79hcqn.9verage acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is launched from a catapult on an aircraft carrier.hbl: rg a29im7 It reachgi: r9 ma72lbhes 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?

  A car starting from rest moves with constant acceleration ofckfc1(3 i 69rqk)if az $2.0 \; m/s^2$ 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 to6 2jwc :t9fiqo 80 m/s in a distance of 200 m. What is its average acceleratif: q6j9 w2tcioon?

  An object starts from rest and undergoes uniform acceleration. During t 2oaolec6n4(:)hvs xd he first second it ( d2:s6on)4ae hcxlvotravels 9.8 m. How far will it travel during the third second?

  An object is moving in a straight line with constant acceleration. In5hgy:k(tn3l c x9 6srqitially it is travelin 3n(yx9r6khlt :gsqc5 g at 16 m/s. Three seconds later it is traveling at 10 m/s. How far does it move during this time?

  A car starts from rest andte69*hki 7 :in9uykhe 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 b69y r xgj, d6;a.nxfia dry road can decelerate at about $5.0 \; m/s^2$ when braking. Suppose a car is initially traveling at 55 mi/h.
(a.) How much time does it take the car to stop?    $s$ (only input numerical values)
(b.) What is the stopping distance?    $m$ ((only input numerical values)

  At the instant a traffic light turns green, a car that has been waignlm.- 91hexb ting at the intersection starts ahead with a constant acceleration g-1xelm9n .hb 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 wi/sxa1qx1; ;pe uoj(ylth a speed of 12 m/s on the surface of planet X wher/x soxa11l(q;uy je;pe the 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 surface of gy.rh.a5y.p- 0nhxymm* .v nxplanet X where the accele-y m nphy.vhx.ary0x . *n.gm5ration 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 a speed of 15 m/ -lh /g.ojtrf8s on the surface of planet X where the acceleration due to gravit8l g h.jtf/or-y 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 14cv;us;h /1 udr m/s on the surface of planet X where the acceleration due tour;d;u vsch 1/ gravity is $3.5 \; m/s^2$. What is the speed of the object after 8.0 s?

  Human reaction time is usually greater than 0.1pm g/sp q)/m,+ :y yz,puyyyg(0 s. If your friend holds a ruler between your fingers and releases it without warning, how far can you expect th qy:/yz, gg)pm, syypp+u(m /ye ruler to fall before you catch it?

  A ball is thrown upward at a velocity of 19.6 m/s. s5ut7i hn8/squ nc* 32ps80mpj0ger v What is its velocity after 3m 35n 7gh8c s8002 ne/svsiutpr*qupj .00 s?

  A bullet shot straight up returns to its starting point in 7 s. What is tjfsyp pdo 3k-mh2u8g k9n2y 9:q1x2pbhe initial speed okfm :8292 gq2 h19yu dyksnxpopp3j b-f the bullet?

  A ball is thrown straight up with a wpk h. m-bd7vpp3e2 :uspeed of 36.0 m/s. How long does it take to return to its s2p.7 ue3pd-b k:vhmpwtarting point?

  A ball is thrown downwafna-dzhul rl 4w+n9;( o (uxe-rd from the top of a building with an initial speed of 12 m/s. It strikes the ground after 4.5 s. How high is the builr h(-of-ela49 (;+nlw zunduxding?

  A ball is thrown straight up with a:flvu ws0dg gg,8l8;d speed of 30 m/s. (only fill in numerical value in the blg8,w:dgs;u l0fdlgv 8anks)
(a.) How long does it take the ball to reach the maximum height?    $s$
(b.) What is the maximum height reached by the ball?    $m$
(c.) What is its speed after 4.2 s?    $m/s$

  A foul ball is hit straight up into the air with a speed of 32.4 m/s, bar slmdwvj4q s lb0k(30/5c. (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 1 seconds later.  (数值)  $m/s$
(e.) Determine the time at which the ball pass a point 5 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 5.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what is thp no k7-2d-oiee velocity at t = 1.0 s?

  In Fig. below, what g*6 mw.2gii gwis the velocity at t = 2.5 s?

  In Fig. below, what v(v, 7q) u4krmvr8os nis the velocity at t = 4.0 s?

  In Fig. below, what is ugm hpz8k 04y+ ye:,ufthe velocity at t = 5.5 s?

  In Fig. below, what is oxe5.v q mg);qby l3:xthe average velocity from 0 to 4.0 s?

  In Fig. below, what is the average velocity 5kskpq(2o 35 qmkbnf *8-)kcekyzx 5tfrom 0 to 6.0 s?

  In Fig. below, what is the acceleration at 1.03 k*4(qb vqrbj)+wdhu s?

  In Fig. below, what is the accem d06 (hdt: pq25bnu0-thsr xnleration at 3.0 s?

  In Fig. below, what is the average accelercjmxs3 sqc(hdj+ ;y.:ation from 0 to 5.0 s?

  In Fig. below, what ij,r1u/ gj/yt l(3cmq os the average acceleration from 0 to 8.0 s?

  In Fig. below, what is the displacem/ noyung,- r tc5n.pe+l2g92qjl u*dment from 0 to 8.0 s?

Does a car speedomet;s hn1k.oyi 3jer measure speed, velocity? {speed|velocity}

  An object can have a varying speed ifkq:+ctnj+p x :h7st4x its velocity is constant.

  The velocity of an object can be negativroz 3xjq-x f56e when its acceleration is positive.

  If one object has a greater speed than a svqahp r2,qa- g*(qzw3econd object, the first must have a greater acpha( q -r2v3g aqq,*wzceleration.

  Two cars emerge side by side from a tunnel. C) 3w591d 1 fuhlqyiexzar 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 increasing in spe skgf+dy7l03vc .esn14f7l yt1 uf+tved as its acceleration decreases.

  A baseball player hits a foul ball straight up into the air. It leaves th :b6chx 2cxwaxrdmu-+3h4,zeyz, ub ,e bat with a s3xwcx,uz+ ,4 d,bme2ryxbhz-hau:6cpeed 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 toiv* 8e+h7 6 e r;v:2qrzeq neyok98gqk its acceleration, how does it change if air friction is igney7hkz qr8 v qe*8;rv: +e26e ngiqo9kored?

  As a freely falling object s utjybpd 7c3;3:0 cfg3hdk5 vwpeeds up, what is happening to its acceleration, how does it change if air friction CAN NOT 3vhy03c p;djbt: wcg ud7 35kf be ignored?

  An object that is thrown vertically upward will return to its original positiol1d lf8i k (8ayz(1jgzn with the same speed as it had initially if air resistance is negligible. If air resistance is appreciable, how f 8iyl1 (1z(kgzalj8dwill this result be altered?

  An object can have zero velocity and nonzero acceleration at the same time.lv/7k )otby4(abg4 6n d,opqr

  An object can have nonzero velocity and zero acceleratiotm8lu4yh de/.n at the same time.

  An elevator moving from the second floor to the fifth floal 0zjcbm+mzq+h5 x i0evrt8. (fi/9vor making no stops along the way has zr(e /hqmj9cz 05fmil8i.vxa0t+z b+ vero acceleration all the time.

  A rolling ball moves -)dlxz* trk54b/7lxo hrd0wpq axg7-from $x_1=1.9 \mathrm{~cm}$ to $x_2=-4.3 \mathrm{~cm}$ during the time from $t_1=1.0 \mathrm{~s}$ to $t_2=5.9 \mathrm{~s}$. What is its average velocity?  (数值)  $cm/s$ (only fill in numerical value please)

  A particle at $t_1=-2.3 \mathrm{~s}$ is at $x_1=2.4 \mathrm{~cm}$ and at $t_2=3.6 \mathrm{~s}$ is at $x_2=8.0 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete laps around a quarte6/y/pbg02k/jradn j tr-mile ($1 \; mile = 1609 \; m$) track in a total time of 7.6 min. Calculate (a) the average speed  (数值)  $m/s$ and (b) the average velocity    $m/s$

  A horse canters away from its trainer in a straight line, moving 96 m ag povao s(;i0r)4s cg1way in 11.7 s. It then turns abruptly and gallops halfwayc;g so0vg)o4as 1(i rp 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 :r.xy4f s9wnwh e3g2i$12 \; m/s$ to $24 \; m/s$ in 4.7 s. What was its acceleration?  (数值)  $m/s^2$ How far did it travel in this time?  (数值)  $m$ Assume constant acceleration.

  A car slows down frome y+ngp. jpsb1-lghm,0 )(got/h x )lp $20 \; m/s$ to rest in a distance of 66 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must re)2se/7txr fa xach a speed of $31 \; m/s$ 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 s6at6v3o 5 dvt-8) jhhb:mx btburst out of the blocks to essentially top speed about to85d hbj tv:6svx6- 3 mb)hta$10.5 \; m/s$ in the first 13.3 m of the race. What is the average acceleration of this sprinter?  (数值)  $m/s^2$ and how long does it take her to reach that speed?  (数值)  $s$

  A car slows down unifor wf bpgg5g5(ui3z19u tmly from a speed of $19 \; m/s$ to rest in 5.66 s. How far did it travel in that time?  (数值)  $m$

  In coming to a stop, a car lear5.eq .lp(oew9nxu ) mves skid marks 92 m long on the highway. Assuming a deceleration x9 .5qer)lwunopem.( of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck ewk vw:zb.0 8qgoing $25 \; m/s$ 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).    $m$