Suppose that an object tradc.a7nol1prhqbnw,o6g w06 4 vels from one point in space to another. Make a comparison between the displacement and the distance traveln60 .6pl7wc1gohqw , db4aonr ed.

  When is the average velocity of an object equal to the instany0qhb; s 1 7xt-aa ,3b61vy uuyh d2kgssw)oe/taneous velocity?

  A new car manufacturer advertises that their car can -z++tr dl j1okbz(zph/ 3y ;zzgo "from zero to sixty in 8 s". This is a descri;jkzlp zyz/z hrd1++3o(z tb-ption of

  An object moving in the +x axis experien+zox- 6kjo8cy25rq nq ces an acceleration of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling tf4 n0ea1fnamsn. (gv0o the East (+x direction) begins to slow down as it approaches a traffic light. Make a statement cm1a v0agfne4.n0ns( foncerning its acceleration.

  Suppose that a car traveling to the West (-x directi5b+:t cm s/ju/vrq: (izwgh5m on) begins to slow down as it approaches a traffic lig5/jugmb:ts:h 5rc (q+zmw i/vht. Make a statement concerning its acceleration.

  Suppose that an object is moving with a constant velocity. Make a statement c 7uavm)9pf xf ekg(3ul19k .ljoncerning its accelerav.)xu1 u9mgfjkkefal 9 p 7(l3tion.

  If the velocity of an ob9leb 0kod3xp d qsm7 l:8zfu88ject is zero, does it mean that the acceleration is zero? Suppfulsz kb9loed: 03q8mp 8 8x7dort your answer with an example.

  Can an object's velocity change direction whenak qor8p -oo7, its acceleration is constant? Support your answer ,oa8orq k7-p owith an example.

  Suppose that an object is moving withk y7l2 p52jr +ulr/ibsou;ta) constant acceleration. Make a statement co rl5alyp;2su + bio)/rt7 2jukncerning its motion with respect to time.

  Can an object have increasing spes- itk/t+,x*po tn j.jed while its acceleration is decreasing? Suppotjs+i/.pt tk,- jxo n*rt your answer with an example.

  Suppose a can, after an initial kick,a4f1dy 1uzuy8 moves up along a smooth hill of ice. Make a statement concerning its accel1d uuyz 18a4yferation.

  Under what condition is average velocityrf3c . hlx:pvd9es,k0z yw-z. equal to the average of the object's initial ancl r3pzw :exv0h -.y9sf. ,kzdd final velocity?

  Objects A and B both start at rest. They both accelerate at the same +hxz+o,v yc z6f9 uwwi sn6u-4rate. However, object A accelerates for twic s +x4wnfhz6w+,zc yi-9uv uo6e 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 t+sp)pmrwf*. rf2xg9b d6zx 5f0diz 4nhe same rate. However, object A accelerates 4ng 60p)fs25rz+9w ipz* dxxmbrf d. ffor 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 5pgsy*.vhno2 eb8 bye qz5j7(rest and falls in the absence of friction, which of the followie7eys*y b2z(voh8p5j5.qbng ng is true concerning its motion?

  When an object is released from rest and falls in the absence of fr-+q:x; rthahjxr+;o oiction, which of the following is true concerning its mot-xarq;hxho:++ o ;rjtion?

  Suppose a ball is thrown straight up. Make a statement about the vej)jeokf ++;pflocity and the acceleration wh)fjofe+; kj +pen the ball reaches the highest point.

  Suppose a ball is thrown scyu zp(i:2(naddp6n 2a8 l o.ctraight up. What is its acceleration just before it reaches itn(pyozd(2d2 : can ua8i l.pc6s highest point?

  Suppose a ball is thrown straight up, reaches a m9k * t q5x7paxhnr5v0taximum height, then falls to its initial height. Make a statement about the direction of the velocity and acceleratiork7tqxv5 5*tp9nhx a0n as the ball is going up.

  A ball is thrown straight up, reaches a maximum heightalgy(s k: cqt6qy )1)dw;sa (a, then falls to its initial height. Make 6a sayk;gaq)w t(ls:) 1(yq cda statement 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 occl1si4 ()ar(n7zc gc6 a7earesistance. Make a stateeis 71)lc c7zoc (aga64cr na(ment concerning its acceleration.

  Suppose a skydiver jumps from a high-flying plane. W.byi5 2 **o+gjgakmfyhat is her acceleration when she she reaches terminal velocity?ki+oj5.2fb yyg *mag *

  A ball is thrown vertically upward with a s3 r0 v0 fwhea2fj9ruv:peed 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 t3rh 2 0u0vv:jwf ra9efhe first ball? (How many times higher does the second ball go than the first ball?)

  Ball A is dropped from the top of a buhmuf*a() la4 m poiy. za3dk82ilding. One second later, ball B is dropped fro.hp34lu y()2 8z d*amimaoafkm the same building. As time progresses, the distance between them

  Ball A is dropped from the top of a b)viz ep* 7op2 vk(vh9juilding. One second later, ball B is droppo2 jvkpz7*(9)pvhvi eed from the same building. As time progresses, the difference in their speeds

  Two objects are thrown f*f2ie d sq txm9q6sq 5+s,ncxk:ahe7 5rom the top of a tall building. One is thrown up, and the other is thrown down, bs2k9ixn ,5*th6s7 es+dm5c:qefx qq aoth with the same initial speed. What are their speeds when they hit the street?

  A brick is dropped from the to5*4kxq44:x g rpii8pb4njfux p of a building. A second brick is thrown straight down from the same building. They are rkfbp44q *i5:x4ig upx4x 8 njreleased 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 axis. Th ;npz vbs:t4/ ewv2uz/u1brs3 e position versus:;u/u2vst zben4z3wbpsv /r 1 time graph of this object is

  An object is moving with constay/xi31rmq)ct *gbv r4nt non-zero acceleration in the +x axis. The position vtm r/3qr1gyxc v*4)biersus time graph of this object is

  An object is moving with constant non-zero velocity in th3q98coyd ;jlth.s7hf d7h /cc e +x axis. The velocity cld9d7o8t.cf3hhjscq 7/ h; yversus time graph of this object is

  An object is moving with constant - q-fzcw fuz/t1/3wupnon-zero acceleration in the +x axis. The veluzt -w-3f uq1//zwcpfocity versus time graph of this object is

  The slope of a position versus time grf9-4rtuw3yd t6 ,zmgr aph gives

  The slope of a velocit5le u0i0.ftqj. 2 isr z+n3wkxy versus time graph gives

  The area under a curve in an acceleration versus tok0x;armua(l,l j (f47fiz4gime graph gives

  The area under a curve in a vevf)3 * pe ;x1tmkqg+szlocity versus time graph gives

  If the position versus time graph of an ord1 n 6j;e:9tnnuj2 rqbject is a horizontal line, the object r:2djr6nt1ue nj q9;nis

  If the position versus time graph of an object is a verticaz pl )*sjo2qta mbl6c61 ,muc0l line, the object iss, luq1b*cma jm6 0o2)6t lcpz

  If the velocity versus time graph of an object i,z+zg(93q m r7k hlpgys a horizontal line, the object islgp(, k rhg73y9 zmz+q

  If the velocity versus time graph of an objectojd s8k*5pzc-z ))htg is a straight line making an angle of 30 degrees with the time axis, the ohpg)tz*d so8-5)z k cjbject is

  An object moves 15.0 m north and then 11.0 m south. Find both the distancda1cu7+f ;zn8fj- b 2k hych1q abt3d/t-yc6 fe traveled and the magnitucf 11tkqzu db87 f h;d/-na y+ja b3ytc6-2hcfde of the displacement vector.

  A boat can move at 30 km/h in sti 655n3 3 .6 efd)ksw ipmziqsfymcx55qll water. How long will it take to move 12 km upstream in a river flowing 6.0 km/mfd5i ik6 s3 6qn)qc5xsp.3fm5ew5 z yh?

  55 mi/h is how many m/s? (1 mi .1: qjwcj3zc w= 1609 m)

  What must be your average speed in order to travel 350 *2 tqs5/o.oucp -ykarkm in 5.15 h?

  A runner ran the marathon (approximately 42.0 km) in yki**ov-ibn l 4jqw.1 2 hours and 57 min. What is4kvy*n b.jwq1-ioi *l the average speed of the runner in m/s?

  A car travels 90 km/h. How long does it take for it q9 42x-cej:g1mspfz 72 pq gcnto travel 400 km?

  A ly (light year) is the distance that light tra)2l rvs0red w0 chcb16uzs5 :pvels in one year. The speed of light i:usc2 h ze60s01wb )c rlv5prds $3.00 \times 10^8 \; m/s$. 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 roacjb/9 nf,jo0 nd and you look to the side for 4.0 s, how far do you travel during this inattentbc,jnfo/ 09j nive period?

  If you run a complete loop around an outdoor track (400 m), in 100 s, your zaxlh73-vho 0 average velocix 0oza3 7lhh-vty is

  A polar bear starts at the North Polrk fehd-: . 69mfgprui+65 ny8ct1xoce. 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 stary-rf c 58xr6ou9icfmnk1gp+ e6t .:hdting point. 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, then 1-bt ,9yzy v;5c +xmj(bfcfv8 a.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's average velocityycxta9cbz y; f(b+jv-fv,m 85?

  You are driving home on a weekend from school at 55 mmb3 k:- (yzsupi/h for 110 miles. It then starts to snow and you slowbz(p:sy3u-m k 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 16x 1unl8-z/3ykwj merh9dhv;6 0 km at 100 km/h. What is the average speed of the reh/n 3dujvw;6zyl-1xh89 km motorist for this trip?

  A motorist travels for 3.0 h at 80 km/h and 2.0 ho)j nyx7x bmm e6iraa8n+ z2() at 100 km/h. What is her average speed for thj a)x7ri xobn(a2z)n+ym6 em8e trip?

  An airplane travels at 300 mi/h south for 2.00 h and then atbgvmqk,m.s z83 ,j.tu 250 mi/h north for 750 miles. What is the amv, .k .s btjz,8uqmg3verage speed for the trip?

  In a 400-m relay race the anchorman (the person who runsmth f n;41edzh2ij7 xd,(qi46fcnee+ t-) las 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 team A runnerlf,e1i +z4nt mj ;hqet d-2 )sc xehf6n(a7d4i not lose the race?

  A car decelerates uni1twfdwl x.) w)+tfb( e9ldsx2formly and comes to a stop after 13 s. The car's average velocity dsw.)fled wd(tt9l1 f bw+x) 2xuring deceleration was 73 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 ratqqikzo0 12-b le of qlz0qb 2-k1o i$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h accelnjn, ;ac8 f1jyerates 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 antq94 hx r2ormp,i q7) dl.,mgcd 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 for 10 s. It then speeds up with a cy)(a++h5en (fgix ulo onstant accelerationhg)+l( u ef(ai+ox y5n 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 7.3 m/s experiences a/0/epd) b y 1v(oquqg2ttq5p b constant acceleration ofuob1pqqe 5p 20(qt/yd tb) vg/ $4.4 \; m/s^2$. What is the cart's displacement during the first 8.2 s of its motion?

  A bullet moving horizontakq/) hdqw5n(ft g;q4s9up /unlly to the right (+x direction) with a speed of 227 m/s strikes a sandbag an59)nkqf (u4g/ htqwuq/sn ;dp d penetrates a distance of 65.46 cm. What is the average acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is launchedwz,bro ;o;dx 4 from a catapult on an aircraft carrier. It reaches a speed of 42 m/s at the end of the catapult, and this re,;;o4dw rx bzoquires 2.0 s. Assuming the acceleration is constant, what is the length of the catapult?

  A car starting from rest moves with constant a+m41okj . tdaeq6j e/xcceleration 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 disyxf 5u5-bsi-* ;7nfcggj w :h6 hpfiz1tance of 200 m. What is its average accelgfz f7n5:hx6y- b*hiipfujc1 w 5-gs; eration?

  An object starts from rest and ybfi l 0;0,kitundergoes uniform acceleration. During the first second it travels 1.6 m. How far will it travel during the third secon0y bilkfi;t 0,d?

  An object is moving i3o 26xwb/cyhwa vi;-i n a straight line with constant acceleration. Initially it is traveling at 16 m/s. Three seconds later it is traveling at 10 m/s. How f iwx/ b;owaicy62-3hvar does it move during this time?

  A car starts from rest and myimjk(3lw( pl,r bd.-,7,d qwon a2taccelerates 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* r 9y)biqfr/leoa04v 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 turnsl joola7 ,ly-i sckc),)l4;tr green, a car that has been waiting at the intersection starts aheak,) il);4l-r, tyo 7llocjcsad 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 on the surface of pyk;d,d- ( t(zpjsvrx9lanet X where the acceleration due to gravity zdj; d9 p, vxytksr-((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 oa),y7 jbta pf6 bb;k4*q2 xdeh/zu9 nkf planet X where the acceleratiof ap7, xnyb2kua6)zd4jqhk *; e/bb9t n 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 surface of4skdw1 kdj.n8 planet X where the acceleration due to gravis81 dk4n.wkd jty 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 ozdfhq3*,eht 0sc /)tnf 14 m/s on the surface of planet X where the accelesht 3 0qhd,/*ct fz)neration 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 you )d14jeoigox8r friend holds a ruler between your fingers andig8 4 djx1oo)e releases it without warning, how far can you expect the ruler to fall before you catch it?

  A ball is thrown upward at a vex.pz sn5pt0.da0ob1o+a.;p k g,dqculocity of 19.6 m/s. What is its velocity after 3.00 s; ndpqgx. oa. pkad 00usoc+t1.b 5p,z?

  A bullet shot straight up returns:l;m,*sdsm mb to its starting point in 10 s. What is the initiallm;d s*m ,sbm: speed of the bullet?

  A ball is thrown straight up with a speed of 36.0 m/s. How lo1ex 1b gmf+k7drku.g)ng does it take to return to its starting po1) f 1x de.ug7kgbrmk+int?

  A ball is thrown downward from the 2n 2mjc4ezat7top of a building with an initial speed of 21 m/s. It strikes the ground after 8.0 s. How high ij7ea 2tm4n2zc s the building?

  A ball is thrown straight up with a speed of 30 m/s. (only fill in numerical vb2:w asa)(koi aliw:a( oa2b)sk ue 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 straight up into the air wi x ze1 pn(rvfw,q77+zkth a speed of 29.6 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 1 seconds later.  (数值)  $m/s$
(e.) Determine the time at which the ball pass a point 13 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 13.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what is the veloc yidh:cc;0j(uq d-jz7ity at t = 1.0 s?

  In Fig. below, what is the velocity at t = 2.5 uw(,3qqca94x 33lqtmmg: nu )zr:dqmxd3w5p s?

  In Fig. below, what is the 9j vf6adna*yq04cx 4yvelocity at t = 4.0 s?

  In Fig. below, what is the c6s- i-0zxn 5kje(.j j iwd4uqvelocity at t = 5.5 s?

  In Fig. below, what is tgzd32nha8 yqob u.*mb zb(;k1ljj:z-he average velocity from 0 to 4.0 s?

  In Fig. below, what is the av*lq3d tcwi-dy.pg 44ferage velocity from 0 to 6.0 s?

  In Fig. below, what is the acceleration at 1.0 s?l 2 jqxg.fhr;,,qhw*m

  In Fig. below, what is the acceleration at 3.nc 4/pn v z-d)ln6v/dt0 s?

  In Fig. below, what is the average acceleration from 0 l)c+g 6kh /g,f3hk8t txte;xhto 5.0 s?

  In Fig. below, what is the average nyz+u 0m( 9qqmacceleration from 0 to 8.0 s?

  In Fig. below, what is the displacem j3hnps j5i((b; pqfm9ent from 0 to 8.0 s?

Does a car speedometer measure speed, velocitmau viyfvm;e 81k+r ;3y? {speed|velocity}

  An object can have a varying speed r(t9e;-wje k nif its velocity is constant.

  The velocity of an object can be negative when an7k9 hlz5um 0hs.lmwn7o y61 its acceleration is positive.

  If one object has a greater52o,y t6fi; bbz ozf2q speed than a second object, the first must have a greater accele25bz oof b6ztqi,y2f; ration.

  Two cars emerge side by side from a tu7m9f )ok 6al sb/sbmktgdi 0*9nnel. 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 increasing in speed as its acceleration d8c1vjy; sfdw2r : hmy/ecreases.

  A baseball player hits a foul ball straight up into the air. It leaves pc taq4.4o ui1the bat with a speed .ctpouq4 a4i1of $120 \; km/h$. 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, hw)zj 1a. 10ctkobmrq2ow do kc1.1zj qot)0mb2a rwes it change if air friction is ignored?

  As a freely falling object speeds up, what is happening to its acc)v nfaf 7c( uuxy,3+;06w f2a kxtjlpfeleration, how does it change if3cta wflf)p j (n, a20xfu 6yvku7xf+; air friction CAN NOT be ignored?

  An object that is thrown vertically upward will return5bt sgqk /6odw *j)-ys to its original position with the same speed as it had initially if air resistance is negligible. If air resistance is apprecj) s6bwg*ykot5 dq /-siable, how will this result be altered?

  An object can have zero velocity and nonzero acceleratio) pmyott3u9k-n at the same time.

  An object can have nonzero velocity and zero acceleration at the same time.k32 a6z oq6:fb52u52r+s txkk bjorjq

  An elevator moving from the second floor to the fifth floor making no stnm t(xuc-is0 je br0je8n ()b)ops along tt0u j cexi0r(nnj-))b(b sm 8ehe way has zero acceleration all the time.

  A rolling ball moves fromy:o+ls a scz9cc :5/g8llv)j q $x_1=1.7 \mathrm{~cm}$ to $x_2=-7.1 \mathrm{~cm}$ during the time from $t_1=2.3 \mathrm{~s}$ 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 $t_1=-3.2 \mathrm{~s}$ is at $x_1=3.1 \mathrm{~cm}$ and at $t_2=3.6 \mathrm{~s}$ is at $x_2=7.5 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete lapstplu9ds .mh8: around a quarter-mile ($1 \; mile = 1609 \; m$) track in a total time of 7.8 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, moving 95 m aw 0vbxy+v e-65 mqq6xx1ati h9.nm*ivxay in 8.7 s. It then turns abruptly and gallops halfway back in 4.8 s. Calculate (a) 6xi5b v1xq mv6xm*0y-qh+vt ianx .9eits 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 fro kg) gm*1veyu l6ntq/zhz99/ym $11 \; m/s$ to $23 \; m/s$ in 5.7 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 frok:4.p,7sl+ tzry8ua 7etw x dpm $16 \; m/s$ to rest in a distance of 76 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must rexaz6*6ipi 5 wxach a speed of $32 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $2.5 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinter can x3ryj ,tef kpq;h(:m5burst out of the blocks to essentially top speed about : km(t5;yqphfr,e j3x$11.1 \; m/s$ in the first 11.5 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 fsgs 54jaf6*i byq3jx ,rom a speed of $16 \; m/s$ to rest in 5.05 s. How far did it travel in that time?  (数值)  $m$

  In coming to a stop, a car leaves(u zgpmhgz(4 01-m-br kzx,nw skid marks 92 m long on the highway. Assuming a deceleration ofzumnr0(bz -h4(z xp1 ,-wkgm g $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck gvhv pdy(+5(qioing $25 \; m/s$ 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 cag0r d zod+1)w* .kd+wgie9ithe 10,000-m run in less than 30.0 min. After exactly 27.0 min, there are still 1100 m to go. The runner must then accelerat.rwiiw0dd*9g1d ++)zck a oeg e at $0.20 \; m/s^2$ for how many seconds in order to achieve the desired time?    $s$