Suppose that an object travels from ou kz.-ws aqajl ggdvkp 9xd0hb+a5e/9s305 1lne point in space to another. Make a comparison between 0p xa 3la+s hswk9 baq-keggvld.9/ juz50 d51the displacement and the distance traveled.

  When is the average velocity of arxd3+8((;g uqhxrnc/tw+;y s tjp 9qjn object equal to the instantaneous velocity?

  A new car manufacturer advertises that their car can go "from zero+l8xh g5pum .p to sixty in 8 s". This is a descrigx up.5l+mp8 hption of

  An object moving in the +x axis experie00gec/wj3e hp e5pp6cnces an acceleration of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to the East (+x direction)a9 vrhvppf 915;e,mabd p,3y t begins to slow down as it approaches a traffic light. Make a statement concerning its accebap199t,5hpayer dpvm,3f; v leration.

  Suppose that a car traveling to the West (-x direction)3d4r /b4x0n g 9ddirgd begins to slow down as it approaches a traffic light. Make a statement concerning its acceleraxi g4db/drrdg d403 n9tion.

  Suppose that an object is moving with a constant velocity. Makeci)lf 3, 1zxko a statement concerning its acceleratiofzoc)3k1l x i,n.

  If the velocity of an ob-ma8y p c4*gttw*dm.9 o jugd(i3 hul5ject is zero, does it mean that the acceleration is zero? Support your answer with au. p3ym*wj9i l( 5t8 u-am* 4ddgcogthn example.

  Can an object's velocity ch1fat cf8y2 tq,ange direction when its acceleration is constant? Support your antyqc ff,182atswer with an example.

  Suppose that an object is moving with constan t lu,v 6wu-j- pl.txb2*ike2gt acceleration. Make a statement concerning itit.,pj-x-*6l 2wue tlu gbkv2 s motion with respect to time.

  Can an object have increasing speed while its acceleration is decreasing? Su2djshzy ) *c/w57pvrhpport your answer witdyvhhj72/ )sz rc5p w*h an example.

  Suppose a can, after an initial kick, moves up along a smooth hir:no:odlpq (fa0 y9j9ll of ice. Make :qpo9l9 dy( :ar0jofna statement concerning its acceleration.

  Under what condition is average velocity equal to the avern5x,rl+0jyrch:ps d, a/,l29m ps pxi age of the object's initial and final velocitd n0 mp,s ,c2x5,slyhl a:px9i+jr pr/y?

  Objects A and B both startu x5y-swd iu2+ at rest. They both accelerate at the same rate. However, - yswdu+ixu 25object 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 8h)jufk /xpc fw q,q:,at the same rate. However, object A accelerates for twi8cfxj:qq )fuw,,kh/p ce 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, whibs 9 sgbilo p8r)43k9jch of the following is true concerning its motiopg4oji)9skb38l rsb9 n?

  When an object is released from rest and falls in the absence of frfa;gm/ls5k,+* uzf(fdmk ct z1 g-x3 qiction, which of the following is true concerask(k3;+x gmqzu l-, f1 *5tmd/ cgzffning its motion?

  Suppose a ball is thrown straight up. Mak1pjbw27il 2*em/s uwv e a statement about the velocity and the acceleration when the balwjm iv2w*e s27lup/1 bl reaches the highest point.

  Suppose a ball is thrown straight up. What is itsynmf+,pi2c ) svxs-l8 acceleration just before it reaches its 2pcsy)sf l+v8 x-i,nmhighest point?

  Suppose a ball is thrown straight up,k5 rrh 64uurjx4:6jmy reaches a maximum height, then falls to its initial height. Make a statement about y5:m jrrjukxr4h66u4 the direction of the velocity and acceleration as the ball is going up.

  A ball is thrown straight up, reaches a maximum1xmcw76l)g p)rdro v0 height, then falls to its initial height. Make a statement about the direction of the velocity and acceleration as the bal6) govr1pmcw 7ld xr0)l is coming down.

  Suppose a ball is thro/y,+k (0tpea7y eik,w1v c)p-l uyqcgwn downward in the absence of air resistance. Make a statement concerning its acceleratio+y1 l v yyc ,w)-upq,teai(7k/c0ge pkn.

  Suppose a skydiver jumps from a high-flying plane. What is her accem qh-7t3/qqh) ,;7xvgktuyjbf ,gc: eleration when she she reaches terminal veloc b3htutggq,j vcxhky :7,q -7;/)fmqeity?

  A ball is thrown vertically upward with a speed v. An identical second ball is ar)h x7fpii5b0yd3 4rt6f z6 hthrown upward with a speed irh xhaf07trp dfyz65 64ib)32v (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?)

  Ball A is dropped from the top of a buildingt.x*sg( .r,ca xv+w kp. One second later, ball B is dropped vr+( psx.c,.g* w aktxfrom the same building. As time progresses, the distance between them

  Ball A is dropped from the top of a building. One second luk;n j hj3*-z ep :+ cg4vhpt ve9tc7c*zdkx2-ater, ball B is dropped from the same building. As time prog-jthkzhzn; x k3d 4c2pe*jg tv7*pucc:v - +e9resses, the difference in their speeds

  Two objects are thrown from the top of a tall building. One i / 00wowmam)dbs thrown up, and the other is thrownwmw a0)od/ 0mb down, both 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 bf7g uvn7 ,raf./+yawnrick is thrown straight down from the same building. They are released at the same time. Neglect air resistance. Compare the accelerations of the twouwy7fa/nrvgf +.na7 , bricks.

  An object is moving with constant non-zero velocityd nx4h).oa;jj in the +x axis. The position versus time graph of this objeadx .;j)j oh4nct is

  An object is moving with constant non-zero acceleration in the +x q(8cvdi .j rt*6p m lfv9;qipn9(8sku axis. The position versus time graph of this obu8j q*pm(k9t8q6 n;9d p(vsv. lfriicject is

  An object is moving with constant non-zero velocity in the +x axis. vz,tq 1-pwi9v The velocity versus time 1wv q,iv-zt9pgraph of this object is

  An object is moving with constant non-zero ay.3h cmaxj6sn fc5n)ledi; 76f0 on0ep u1pk-cceleration in the +x axis. The veloc6oc;h1 0ks.f x07na me c )dy5 u-l6nijenfpp3ity versus time graph of this object is

  The slope of a position versus time graph givexnu,+gb z xh4hy 540mrd-(rtqn 7v3ccs

  The slope of a velocity versus time gfys3m3 yo/l*b qcfb2r+ er0 l*raph gives

  The area under a curve in an acceleration r/ (w9wq j.lg:inx w* 0ktvyq.versus time graph gives

  The area under a curve in a veloci*rhoig7/r3o4 jfvwp 9ty versus time graph gives

  If the position versus time grapis)hab ;7)2vks1f oxd h of an object is a horizontal line, the object is)x7s) fd 2;bk1oasvi h

  If the position versus timtebt- +3g x6dw1)0pgbq) f akie graph of an object is a vertical line, the object is0+gq 1d )a x -bte6)kwf3pgitb

  If the velocity versus time graph of an object is a horizontal li64,kd ecjxg o1ne, the object i1dxo,gk4c 6j es

  If the velocity versus time graph of an object is a straight line making a2g7eg(acd s .tn angle of 30 degrees withgsea.t( cg2 7d the time axis, the object is

  An object moves 15.0 m north and then 11.0 m sow eg a)m y- ;x)8dcw,sx/iv:fxuth. Find both the distance traveled and t ixw) ceag)f8sxm;v-y,:/dwx he magnitude of the displacement vector.

  A boat can move at 30 km/h in still water. How long w0sz( km(+qticq(yt. ,c y1ubev u,yx8 ill it take to move 12 km upsy ,+m.uztc,v( kq t0yis8y e(x1(cbqutream in a river flowing 6.0 km/h?

  55 mi/h is how many m3q7z5 + hpugte/s? (1 mi = 1609 m)

  What must be your average speed in order to travel 350 km in 5.194 w2p8ezsdjjpohj f(:u ,ue( 5 h?

  A runner ran the marathonp m:6hj5t 5fqu;5me*.drwme i (approximately 42.0 km) in 2 hours and 57 min. What is the average se5p6*t.qrmujmhm df:e i; 5w5 peed of the runner in m/s?

  A car travels 90 km/h. How long does it take for it to travel 400 k8 3j lp3gf( ,pp.bgpngm?

  A ly (light year) is the distance that light travels in one year. The spelpggdf rm. 3xkpypp g2(b+5jus a6zn9 -r8z3 1ed of li lx s gf 38.j mrpzpd pk1n(3za6u+29bgp5-rgyght 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 r 8of:wan -y0lfor 4.0 s, how oyfn8r- :0lawfar do you travel during this inattentive period?

  If you run a complete loop around an outdoor track (400 m), in 100 s, y 25xdzzm sar*c*3+dfpour average velpsxd+23 m zdz *cf*a5rocity is

  A polar bear starts at the North Pole. It travels 1.0 km south, thyl;-fw: )g rhsen 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 wasy:rhsl f)w-; g the bear's average speed?

  A polar bear starts at the rs4vb2yz0 xn(c5/sv2sm l3hj 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 poinlsz0 x52m3s2yr s4 v/hcvj(bnt. This trip takes 45 min. What was the bear's average velocity?

  You are driving home on a q5n0j5dmg udl r350ho weekend from school at 55 mi/h for 110 miles. It then starts to snqg03ln0dr5d j 5uo 5mhow and 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 100 km/h. What iso7/gx 8s2 foco;tf j5j the average speed of the xjsgoo 2f57 ct;/oj8fmotorist for this trip?

  A motorist travels for 3.0 h at i0*3dm;glmmbi-lh rz (d a- a880 km/h and 2.0 h at 100 km/h. What is her average speed for the8 ma-*d;bim0z rm(a 3hgld-il trip?

  An airplane travels at 300 mi/h south for 2.00 h a , ybfxi79joj1nd then at 250 mi/h north for 750 miles. What is the average speed foriy,1b7jof 9 xj the trip?

  In a 400-m relay race the anchorman (the person who runs the last 100 m) f6(ev xrg ;reph+-uo 18dt xs+qor team A can run 100 m in 9(1rs; dx xeh+g8te u qp-6vr+o.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 comes to a stop asfpvw8. vx;c6u0h- okfter 14 s. The car's average velocity during de6c8 uvf hop;0xw.ks-vceleration was 39 km/h. What was the car's deceleration while slowing down?

  An airplane increases its speed fr,tigof)f r5 9ue2en /luv e((oom 100 m/s to 160 m/s, at the average rate of ugoov , 5(t) i2eee9fru(nf/ l$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h w;w sz8i,y2gy/:kemr,9fb eh5a bawa 8p, tq 3accelerates 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 accelera f2wv+-c ughx* rgxb-4tes 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 acceleratig)-zc,m6*suf qu nmi/oncms6 zn)u/q* ,g-mi fu of $2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial velocity of 5.6 m/s experiences a constan2a+++5q0j giqkfcf r. tl7khct acceleration of 2a c t.+ cfk l7g0+i5j+qqkrhf$4.5 \; m/s^2$. What is the cart's displacement during the first 6.0 s of its motion?

  A bullet moving horizontally to the right (+x direction) with a pq y xxv2ltu7p+ hi/;1speed of 224 m/s sty xu7+/ ptpi2;lx vqh1rikes a sandbag and penetrates a distance of 22.53 cm. What is the average acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is launchez+nbd0bv sc8u+m-; zagt2 zl :,twr :ad from a catapult on an aircraft carrier. It reaches a speed of 42 m/s at the egn r-t0 tw s2+:z l audv:+c;z,8bzabmnd 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 of bfiwi1n)6 mf1$2.0 \; m/s^2$ 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 s.i fh ugp93c, yb*f6ga distance of 200 m. What is its average acceleratp ,gf6i s.f3b*gh uyc9ion?

  An object starts from rest and undergoes uniform acceleration. q8hdkp(0xqic1 j 2axf r t0y41 During the first s(0qfh2 1q itxd k4cjpx18r0a yecond it travels 5.7 m. How far will it travel during the third second?

  An object is moving in a straight li:z(ot*hi5 j jmazx39qne with constant acceleration. Initially it is traveling at 16 m/s. Three seconds later it is traveling at 10 m/s. How far dx: otim*9 z(jh3 z5jaqoes it move during this time?

  A car starts from rea3d7mhc,; fm est and 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 drys8u 9y04dwgc y 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 waitinew mrj106 x/mu b7c:fzg at the inte:rwju/xm mce1 zfb706rsection starts 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 spee9r7koo (j5 7xe:iwnafl7pna7d of 12 m/s on the surface of planet X wherrj75ax9(n 7ko7pa:ewf o7 il ne 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 wi u0e n(d6ugzolb9b54;2lw pn dth a speed of 12 m/s on the surface of planet X where the accelerationbogwzn b4dpd ;2l90luen( 65u 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/s on the surfac.1c3: ynh; nsbdqu,dhe of planet X where the acceleration due to dn1s:hq,bch3u .n; yd 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 of planey;;h yl(tpc, dp6v s4yt X where the acceleration due4 d,s6l p;vy;cy(h pty 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 than 0.10 s. If yourjv3 . og5qdz7g friend holds a ruler between your fingers and releases it without warnin.g7go 5vdz3j qg, 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/s.:jpz1hom4l+yh 1i 1 v6 w;c4xzl etf9u What is its velocity after 3.00 s?e hu16l+plo1 fyvx: h4 cjtm9;w 4izz1

  A bullet shot straight up returns to its starting point in 14 s. Wl o.l,zh9)t r5 dsw 3j,gm+ul gj7phl5hat is the initial speed ulohzl+sj)gl5t7l 5hpw.mg 9jr ,3d ,of the bullet?

  A ball is thrown straight up with a speed of 36.0 m/scj8fq ad;e1cz9* e1tj. How long does it take to return to its star;8c*zc1 tjeaq9 e1jdfting point?

  A ball is thrown downward from the top of a building with an initial ho3/zpr ;abqj i/ 1mf)speed of 23 m/s. It strikes the ground after 4.2 s. How h/31ohj m pb/firaqz); igh is the building?

  A ball is thrown straight up with a speed of 30 m/s. (only fill in numerical m94wb.vg ia,c z(wzys)6 grz7value in the bvbyrs(g)wmi 74a6c,gzw z9 .zlanks)
(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 48.4 m/s. the q7x2b9 l9q(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 8 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 8.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what is *v7 n(a nguy)gthe velocity at t = 1.0 s?

  In Fig. below, what is the velocity at t = 2.fl x+jvl clv*f s.qv8pfc302.5 s?

  In Fig. below, what is the velocity a:rsy8m c h46plt t = 4.0 s?

  In Fig. below, what is the velou+1cyk: 3vhp :wtea04obk) x ecity at t = 5.5 s?

  In Fig. below, what is thto . qj10m ,s*6hhsmp; m/dptze average velocity from 0 to 4.0 s?

  In Fig. below, what is the average vsp,4tff t f) :. ethq.jntp.5telocity from 0 to 6.0 s?

  In Fig. below, what is the acceleration atb( 3id+7q nudo 1.0 s?

  In Fig. below, what is the acceleration at 3.;mifpk( x8 (bj0 s?

  In Fig. below, what is the average acbm0lu+ -)5mdts hd7wgme)1fk celeration from 0 to 5.0 s?

  In Fig. below, what y(tuyt*v 9wk+ is the average acceleration from 0 to 8.0 s?

  In Fig. below, what is tht z2x9 5*zr9 x0vkla-cualb0me displacement from 0 to 8.0 s?

Does a car speedometer measure speed, velocity?tw(l 8d at-cz* {speed|velocity}

  An object can have a varying speeqhy ;2af+ gs) y*ybh0+h-dfi hd if its velocity is constant.

  The velocity of an object can be negative when its acceleration is posl0ht4+ /5ahqw+ gfgcp 5fddi5l(oh / mitive.

  If one object has a greater speed than a second object;egc h+8j*guko k cl-8, the first must have a greater acce kgoc kh8 ;eguj*c+l-8leration.

  Two cars emerge side by side from a tunnel. Car A is traveling t.al/ bbl 0ib ;anwv62with 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 acc jxfm)25qw5.hj9 xkapeleration decreases.

  A baseball player hits a foul ball straight up into the air. It leave)5u8vx k9,walrrk(its the bat with a speed of wui)5( tl,kv9rk8arx $120 \; km/h$. 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, h n4guyz9ci2l5fx p/i1ow does itz/52 icf41un9xyipg l change if air friction is ignored?

  As a freely falling objecn y,b 3)jh8k lcrnh(pq 7a /p7.esvs7ft speeds up, what is happening to its acceleration, how does it change if air fric r(nb7phklv7cf/p8n h7y aj)s.qe,3stion CAN NOT be ignored?

  An object that is thrown vertically upward wiliuu)*((qvb 2l5gzsewkjw/x m9k a*5fl return to its original position with the same speed as it had initially if air resistance is negligible. If air resistance is appreciable, how will this5e)9kgx m(uzb*( a uvi/ w j2ws5lk*qf result be altered?

  An object can have zero vey ui-m74 hij:elocity and nonzero acceleration at the same time.

  An object can have nonzero velocity and zero acv*c r;mtkctpr m c;8lp;s p/23celeration at the same time.

  An elevator moving from the second floor t;,a*voqmu5h d3pz(jo f4/lg co the fifth floor making no stops along the way has zero acceleration all the 3fg4 (jov ozdqa,mh/5pc* ul; time.

  A rolling ball moves from .)t:hjnkc bxs-(ezxsg 4j*k 0$x_1=2.8 \mathrm{~cm}$ to $x_2=-6.3 \mathrm{~cm}$ during the time from $t_1=0.9 \mathrm{~s}$ to $t_2=5.6 \mathrm{~s}$. 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 $x_1=3.4 \mathrm{~cm}$ and at $t_2=4.4 \mathrm{~s}$ is at $x_2=8.5 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete lak)co /2dlw8rrps around a quarter-mile ($1 \; mile = 1609 \; m$) track in a total time of 7.9 min. Calculate (a) the average speed  (数值)  $m/s$ and (b) the average velocity    $m/s$

  A horse canters away from its trd 7-d,xr xle*7 fhfs7dainer in a straight line, moving 114 m away in 8.6 s. It then turns abruptly and 7l dr d-7hdfxefx7,s* 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 fromm14 ( zm1ycgxa:mpv9a $13 \; m/s$ to $23 \; m/s$ in 5.5 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 from ckc*u*gg3kz f5 z 8id/jkz.wz:sbl(zh 1cq:: $19 \; m/s$ to rest in a distance of 56 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reach a1iz)lh0qnt;oq* n;x fb)fkf r7 e61g o speed of $27 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $2.2 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinter can burst out of the blocks to essentiallf0ghy fw/2p )py top speed about wphf02fy/ )pg $10.4 \; m/s$ in the first 14.2 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 unifok1yw n * n.2uk9y9;8uafftzvbrmly from a speed of $20 \; m/s$ to rest in 5.32 s. How far did it travel in that time?  (数值)  $m$

  In coming to a stop, a car leaves skid (( s2 swe/dzvftky-9r marks 92 m long on the highway. Assuming a decelkz2d(9 ssr(w/yet-v feration of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a tru-3 xbztd a(nh;a;jkl ys/ (3:x 2izqjock 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 5-q bpbreofj)jt//,c 10,000-m run in less than 30.0 min. After exactly 27.0 min, there are sticj)ftj 5b e/- /qpb,orll 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?    $s$