Suppose that an object travels from one point in spaah31y3 gdix,m ce to another. Make a comparison,3gia1m yx 3hd between the displacement and the distance traveled.

  When is the average velp ;qbpm1+u0dj(;q axe hhk/s9 8/iwwyocity of an object equal to the instantaneous velocity?

  A new car manufacturer advertises t qmy3 5zyg3(jxhat their car can go "from zero to sixty in 8 s". This is a description y5zjyxm3(3 qgof

  An object moving in the +x axis experiences an acceleration 266+4aatkn rn su,sreof $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to the East (+x direction) b9 b1*he wkfbf/rk (o5fegins to slow down as it approaches a traffic light. Make a statement concern9wk frofkbf 5he/(*b1ing its acceleration.

  Suppose that a car traveling to the West (-x dirmznv s.av;p m5i r*8t9 +bp.hrection) begins to slow down as it approaches a traffic light. Make a statemenmm.nvspvtb a9+i;p. z8rrh *5t concerning its acceleration.

  Suppose that an object is moving with a coljra k s 5njx9ee(g g.i lt,t9(2-jog 03bxen*nstant velocity. Make a statement concerning its acceleratio k9tg-trle s n ,(*ij3le0ng exj.2ob9j(xag5n.

  If the velocity of an object is zero, does it mean that the acceleratio:c7u-sp jx,9p ,zjwmd6 gp /ign is zero? Support your answer with an exam6,cp,pzm/w:iju gxg7 9 s-djpple.

  Can an object's velocity change directioqb ow+/.c:qfv yix;-3 mlph m:n when its acceleration is constant? Support your3: wpom/qy:bvi q-x.;f+ clh m answer with an example.

  Suppose that an object is moving with constant acceleration. Ma0xng ,kosj o06ke a statement concko0 s6on0jg,x erning its motion with respect to time.

  Can an object have increasing speed while its acceleration is de).at)hgk9umqz/wum( ; rcrh )creasing? Support your answer with an exau)()qhm) z t9r.guh a/ m;krcwmple.

  Suppose a can, after ah6ljp :ym-0lqwk ho07 n initial kick, moves up along a smooth hill of ice. Make a statemljyq7h6:w-lm0p 0h o kent concerning its acceleration.

  Under what condition is average velocity equ2m+v v dekg7 .mjt8ng.al to the average of the object's initijm +8n.t.g em gv7d2vkal and final velocity?

  Objects A and B both start at r h4:pprlu* rgg3rkm(- est. They both accelerate at the same rate. However, object A accelerates lhkg:upgr*(3rm -rp4for 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 thembr: (nnji/e;dz vh;m8u:u 7t same rate. However8m rm(h: u;j u:e/ib nt7;dnzv, object A accelerates for 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,v;*dmx jj877pr/xc kc which of the following is true con xd*8kj pc/v7;j7c mrxcerning its motion?

  When an object is released from redt2 gv;d z)gx9st and falls in the absence of friction, which of the following is true cont gdg29); vdxzcerning its motion?

  Suppose a ball is thrown straight up. Make a statement abxv 06xk5c58;f qsv3l9s ivtls out the velocity and the lcls9 x6ik5f ;v5t83 0sxv qsvacceleration when the ball reaches the highest point.

  Suppose a ball is thrown strfu 8y3yp*woxc,:zm8 w aight up. What is its acceleration just before it reu8y:mzy 38cx fp*,wo waches its highest point?

  Suppose a ball is thrown straight up, reaches a maximum height, then falls tqaar 91gy .rcjpy(193cl.gedo its initial height. Make a statement about the direction rer9q9 3y1clagdyg1 a(p .. jcof the velocity and acceleration as the ball is going up.

  A ball is thrown straig)pspeo sp4p2x4 d1*gwht up, reaches a maximum height, then falls to its initial height. Make a state1pps p 4oe2*) sgwd4pxment about the direction of the velocity and acceleration as the ball is coming down.

  Suppose a ball is thrown downward in the absence of air resistancer4tsunv1+notb 8+ 7hw. Make a statement concerning its accelrht+wns u+8b1o 7tvn 4eration.

  Suppose a skydiver jumps from a hig9 rykx,5v4be hh-flying plane. What is her acceleration when she she reaches terminarv94bk hey5,x l velocity?

  A ball is thrown vertically upward with a speed v. aghi 01l*l bi) 3ktfb- An identical second ball is thrown upward with a speed 2v (twice as fast). What is the ratio of the maximum heigb i1i h03kl-tb*fgl) aht 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 building. One second later, ball B is dr amcn2v 80sv)*dsh1 4tmvzsz8opped from the same building. As time progresses, the distance between them dmss1)8a02vh8t vzms*4n cv z

  Ball A is dropped from the top oz44ou-vbbsnoz ,ks1 0r-iei )f a building. One second later, ball B is dropped from the same building. As time progresses, the difference in theirsvine)1s o b4-4oiz 0rz,b uk- speeds

  Two objects are thrown from the top of a tall building. One is throwngaur:ql 2+-t:fu 8dey up, and the other is thrown down, both with the sae8+-dqrg a:t2 fu y:ulme initial speed. What are their speeds when they hit the street?

  A brick is dropped from the top of a building. A secon.fs f+rw*yfn:8 j/hx7x hctn03 f*kosd 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 .fostxknfhcn8y 0 / f :*7f h*sw3jr+xbricks.

  An object is moving with constant non-zero velocity in the54jy ve )tepb,w/h6v3d*vzwd +x axis. The position versushdbe4y w3,v*/ 6we)d5 vz ptjv time graph of this object is

  An object is moving with constant non-zero acceler-+eyn:zb mc iw df9l+)ation in the +x axis. The position versus time graph of this ob i:)ln zedwm-+ycf9 b+ject is

  An object is moving with csc r i9h/al7p( 0pxw3is5l q/zonstant non-zero velocity in the +x axis. The velocity versus timep/xaz cs/7hqwp 0l 39 l(5riis graph of this object is

  An object is moving with constant non-zero acceleration in the +x3:)hlc/*ghx, rmxg z g axis. The velocity versus time graph of :,xr )*gl / ghgxhmz3cthis object is

  The slope of a position versus tim0b(od0z x,6k7hcli oie graph gives

  The slope of a velocity versus time graph givell2bhdfagx:*9 ms1yk 3ca6 4hs x6r/bs

  The area under a cury//rqnmle+o j(3a) :qkto 7 xrve in an acceleration versus time graph gives

  The area under a curve in a velocity versus time graph giy l f )s;me0a1rf5,4j bqw+t4tlmvf3 qves

  If the position versus mm2ub .mih,c(uu*oj :time graph of an object is a horizontal line, the object isu2oibu . *(mh j,:ucmm

  If the position versus time graph of an object is a vertical line,cv1b4x)rm o 3di 4wrf1 the object isr3r1 )dc oxfiv 14m4bw

  If the velocity versus time graph of an object is a y5r sthz; lxmsa.,b5 ,*6yc dr wd1rm,horizontal line, the object xlr b,*wd s.,m d1s, yrymrtz;ha6 55cis

  If the velocity versus time graph of an o 8skm-kh- qr0hbject is a straight line making an angle of 30 degrees with the time axis, the object h0k- -k qrhs8mis

  An object moves 15.0 m north ayh4med gmeu sewd(kv r) 2k13936wc;a nd then 11.0 m south. Find both the distance traveled and the magnitude of the displacement vectokdeu3wy96r4( 1de3e msvh; a2m g w)kcr.

  A boat can move at 30 km/h in still water. How long will it take to movn /dw1 r7as7*fw+hs0 fduav k9():, hr kxghsee 12 km upstream in a river flowing 6.0 km/) sx1 7gdvhfhs/ur nrk,h:kf0awads (e97w +*h?

  55 mi/h is how many m/s? (1 mi = 1609 mqe/walns 7v 6o + cy+,1egx.hy)

  What must be your average speed in order to f,dr:by .wjovg)::vd travel 350 km in 5.15 h?

  A runner ran the marathon (approximately 42.0 kmypq (0f3rxoyy + 96pbd) in 2 hours and 57 min. What is the average speed of the 6 b xy0qroydp3+y(pf9runner in m/s?

  A car travels 90 km/h. How long does it take for it t(jb ohm6;-d : kxw4oyho travel 400 km?

  A ly (light year) is the distance that light trz sij92sqpzhv1/ im -6avels in one year. The speed of 1p2 ivhjmi9/s zs-z q6light 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 bvm a24m(gw g5gd5arj( z8rh fs88;zbside for 4.0 s, how far do you travel m(a g z8rdg2w5zhab;fjg s8mbv5(r48during this inattentive period?

  If you run a complete loop around an 8 2fd4mu*tt qe 3tqy(xei-l,doutdoor track (400 m), in 100 s, your average 2ddlq4xq3e m8t(-ef y ,*tiutvelocity is

  A polar bear starts at the North Pole. It travels 1.0 km s)5;h ng9llnzv outh, then 1.0 km east, then l )z5 n;hvl9ng1.0 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?

  A polar bear starts at the North Pole. It travels s( s6kit 1op))wp4wb 9*ezyn c1.0 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 tn6 *pew1c4(p9ssky owzbi)) takes 45 min. What was the bear's average velocity?

  You are driving home on a weekend from school at 55 mi/h for 110 miles. It lys, ss)0el54s/97a 4mxn kfh qs9rw othen starts to snow and you slow to 35 mi/h. You arrive home after driving 4 hours and 15 minutes. How far is your hometown from sca5rlklhfo4xse )ys4q ns9s7 ,0/sm w9 hool?

  A motorist travels 160 km at 80 km/h and 160 km at 100 km/h. What is the avr.b6mdi2r m11k4/jteuym/ m x erage speed of the motorist for thisx rty.u1mibmme6 m rdj 2/4/k1 trip?

  A motorist travels for 3.0 h at 80 km/.0i14r 3q63d99ydurvjvsonc kl jb)sh and 2.0 h at 100 km/h. What is her average speed qbn9d6 09y33 i4usjdrlkv ocj.v1s ) rfor the trip?

  An airplane travels at 300 mi/h south for 2.00 h and then at 250 mi/h north for a cc05igdylrfvh8g2 ge:/uqc9hu 7 39 750 miles. What is tcliud 3/e9r2c5:hga0yc7 v ggf8qu 9hhe average speed for the trip?

  In a 400-m relay race the anchorman (the person whod)-5/y,gpf6)n)qk xt q r lqlo 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 hav-oqtld/ k,)g6np fr)xl 5q qy)e 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 after 10 s. Th3dw1.dhhjnf8g 71sp+g0f fbk e car's average velocity during decelerf1nf3 hg w 1b8k+dfgd7 .phs0jation was 48 km/h. What was the car's deceleration while slowing down?

  An airplane increases its speed from 100 m/s t(bp bw;0rnc 2/ekls d2o 160 m/s, at the average rate of b sbk(pn2ldr w2; c/0e$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h accelerates at the 5sprz .rq fe;f-1xt6 rrate 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+cdle24 a 8q nnd*ys*k 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 u looujvyh 9m1ym):72(px/hf for 10 s. It then speeds up with a constant acceleration of(yf 1:7 vumox2uljp/hy9ohm ) $2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial velocity tp cfw aq onjy9hq, f790z2a(6of 1.2 m/s experiences a constant acceleration of9(t jph y2coqwf7z6 ,aqnf a90 $4.0 \; m/s^2$. What is the cart's displacement during the first 8.8 s of its motion?

  A bullet moving horizontally to the right (+x direction) wih,w8 xe; p(xzgth a speed of 289 m/s st8;g,z we( hxxprikes a sandbag and penetrates a distance of 76.15 cm. What is the average acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is launched from a catapult on a / eo*4g9qfanon 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 catane9 a qo4g*f/opult?

  A car starting from rest moves with constant accelw-a )d9lsk4gkn;f y)p eration 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 200vrdtrv 2. x10sqz8+ lnk x4k0s m. What is its average acceleratvxk+kvzt n4lrq rds 20 018s.xion?

  An object starts from rest and undergoes uniform acceleration. During the firt. o/ qwrzfz.m.qsh v1k4u5 n7st second it vzqs/7ok.r4zthu5f mw.1.qn travels 9.4 m. How far will it travel during the third second?

  An object is moving in d2 1g,xaw /mgo7f2hrra straight line with constant acceleration. Initially it is g12orm 2f w7r xdg,ah/traveling 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 and accelerates uniforno-w )tb*nq7 bmly 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 decelerayxz;fiatze58. em ( +mte 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 ul (/y +c0i a5(dczcihgreen, a car that has been waiting at the intersection starts ahead with a constant acceleration c i5h+(zcyi cla(u/ 0dof $2.00 \; m/s^2$. 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 planj l/ 59f2in 0zkr7q5oqcrw;: ,peruwt et X where the acceleration due to gravity isk57 w9ilrc u0/;5r zerof,n 2qpjqw: t $1.5 \; m/s^2$. What is the maximum height reached by the object?

  An object is thrown upward with a ; -,c lpv/dmyf62tvokspeed of 12 m/s on the surface of planet X where the a-mlky2 c6vp;fdtv / o,cceleration 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 u q6w4*wyhltc pz:mb,+o/;oc jpward with a speed of 15 m/s on the surface of planet X where the acceleration due to g q+wyjct,/6cb m: w 4poho*zl;ravity 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 d 5 m+rydtf8q,14 m/s on the surface of planet X where th rd5y8d+, fqtme acceleration 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 than 0.10 s. If your friend holdq3v4 e7dww 1m ;wbjseu692mny s a ruler between your fingers and releases it without warw 9swv u6 bqy4d7;e1j em2n3wmning, 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. What is its d jh 2p58(jumok.pjnqr u;- .cvelocity after 3..nk d php;j8(ou5urq- j2. jcm00 s?

  A bullet shot straight up returns to its starting point in 18 s. Whath6x2ilk 6ee1iyl*w+ qnl;j+k is the initial i62kek;eji6 lw nh1q+yl*l +xspeed of the bullet?

  A ball is thrown straight up with a speed of 36.0 m/s. Ho)z*,q k oz.0 ,r8nzzios0nzd.jla/yuw long does it take to 0iu8o*,j yn,z zaolz. 0 z/)rq.kzsndreturn to its starting point?

  A ball is thrown downward from the top of a building with an ik0vi+ray 9)q 1yobn ;boj9hs*nitial speed of 11 m/s. It strikes the ground a9k 09 1ib;y rjqoo bvha*+s)nyfter 3.7 s. How high is the building?

  A ball is thrown straight up with a speed of 30 m/s. (only l9y 1 f)q0jo uapq..cjgu ,m*wgqw3f.fill in numerical valuewfufgj9.*0 jc u w3p,. .ymo)1qqgaq l in the 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 stru*22kb hhmij bw:cx)*egv r0. aight up into the air with a speed of 26.7 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 2 seconds later.  (数值)  $m/s$
(e.) Determine the time at which the ball pass a point 9 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 9.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what is the velocity at t = 1.0 uq52 61h ipel(7rz 8wtf 3htuawl;g6 ps?

  In Fig. below, what is the velocity at t = 2.5 qiei.p+3ivaxo dkf *(h 67*kna7kyt-s?

  In Fig. below, what is the velocity at t = 4.-1 uo+)drusru 4 sywieu, w67f0 s?

  In Fig. below, what is the velocitr.iy0bb/y n 5ky at t = 5.5 s?

  In Fig. below, what is the average velocity from 0 to 4.0w hzy57fo8k1e6p m4 yl s?

  In Fig. below, what is the average velocitz:f2(m(8wm rwe a1cr gy from 0 to 6.0 s?

  In Fig. below, what is the ac8,1+mwv(8g q sbstxdtte jkj/yj f;2.celeration at 1.0 s?

  In Fig. below, what is the t ww81.obp(1k ee y8lhacceleration at 3.0 s?

  In Fig. below, what is the average accelexhsy;.pqmx(1af5 as 2ration from 0 to 5.0 s?

  In Fig. below, what is the average acceleratix)6qvku 0ia p1;v/ulamfr7 7yon from 0 to 8.0 s?

  In Fig. below, what is the displacement from 0 to 8.l xb3,fj kyh,:0 s?

Does a car speedometer measure speed, vuthlz nae240: yr*-s y4 c*66 cwsecfwelocity? {speed|velocity}

  An object can have a varying speed if its velocity is constanta5ng6f w+try 1.

  The velocity of an object can be negative when its accelerb*y w)5ymmr5inwujd : f md/-*o q1c+tation is positive.

  If one object has a greater speed vv,3q h.-s eulthan a second object, the first must have a greater accelerati vhl- ,qu.sv3eon.

  Two cars emerge side by side from a tunnel. Car A is traveling with a spu2::m4jckf/e ln zf y:eed 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 acceleratioqr5dr, gbe68m n decreases.

  A baseball player hits a foul ball straight up into the a/,xpsd le.:z(q,nm(xg.y o wmir. It leaves the bat with a spe/o,g xwpdmx q zn.s(( :,mlye.ed 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 utkz a39ob udt3 ;izalt),5(tq p, what is happening to its acceleration, how does it chang;utk39l z)zoqi3t 5tba(a t,de if air friction is ignored?

  As a freely falling object speeds up, what is happening to its accelerb ctbnax7c- 3egf ):q-/mura+ ation, how doesrg-xu+)a:ba -ccbnefq 7/t m3 it change if air friction CAN NOT be ignored?

  An object that is thrown vertically upward will return to its original positio+ j 5t;ui6 7hmay*blamn with the same speed as it had initially if air resistance is negligible. If air resistance is ay76 tuj*l+; 5mamb haippreciable, how will this result be altered?

  An object can have zero velocity and nonzero acceleration at the tkhk09njs k 8rco6*tlhpd 329same time.

  An object can have nonzero velocity and zero a+s8qec+ bl wo dj*k35xcceleration at the same time.

  An elevator moving from the ch60v(;y zkgm second floor to the fifth floor making no stops along the way has6 ;( 0zkghcymv zero acceleration all the time.

  A rolling ball moves7gq.x zztjt+2ag zk 0/ from $x_1=1.8 \mathrm{~cm}$ to $x_2=-4.5 \mathrm{~cm}$ during the time from $t_1=2.8 \mathrm{~s}$ to $t_2=5.7 \mathrm{~s}$. What is its average velocity?  (数值)  $cm/s$ (only fill in numerical value please)

  A particle at $t_1=-3.8 \mathrm{~s}$ is at $x_1=3.1 \mathrm{~cm}$ and at $t_2=3.0 \mathrm{~s}$ is at $x_2=8.1 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complet:3pzos/4cln wl*0qir 1 tvgs-e laps around a quarter-mile ($1 \; mile = 1609 \; m$) track in a total time of 12.3 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 104 1(sf.w ; yj ab/pu7faup4n, pqm away in 11.2 s. It then turns abruptly and gaas,ba fp 4(1fj7.unw ;u pqp/yllops halfway back in 4.5 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 fr + dk 4.7wght1(gntrpeom $11 \; m/s$ to $25 \; m/s$ 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 from tb8.) ip0zx v jtsk,s9$20 \; m/s$ to rest in a distance of 71 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must rednm- k/bul*)1;f wx fhach a speed of $26 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $2.8 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinter can burst out of the blocks8dog7 bmisihjmu + .q9 h0-fp3 to essentially top speed abouii 7b0h8fpd +sm -j 9uqmgho3.t $10.8 \; m/s$ in the first 12.5 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 9 wt58ncrn t0t),cvt y xkv*6ea speed of $16 \; m/s$ to rest in 4.82 s. How far did it travel in that time?  (数值)  $m$

  In coming to a stop, a carws p*al :jv844lrdk4owb u 6 )i(ma1by leaves skid marks 92 m long on the highway. Assuming a deceleration of4dw a8wl6yub)1j op4s* b v4mi(al r:k $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truc- 6xj*e73e-htgl( isc j( fuink 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).    $m$