Suppose that an object travels from oni.dwp f/p1ql,*6ob3 vfr t4oze point in space to another. Make a comparison between the displacement a6*b,.4it3/o oqwlfzrdp1 vf pnd the distance traveled.

  When is the average velocity of an object equal to the instantaneous veljxvjd8 ov3(mb6d .( e) -khsruocity?

  A new car manufacturer advertises that their car can go "from zero to 9de8t/7zvak2hy( w z(*qrd3mv5btnbsixty in 8 s". This is a descriptionm27yn hdrzdbqt5 a 93 /vb 8(ewtz*k(v of

  An object moving in the +x axis experiences an acceleaa.g; wa6fc6 bration of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to the Ehu)rxiskve n3l4v4 x9/rrt*n,6 d )a kast (+x direction) begins to slow down as it approi9 lrk,v 4)6un)e4r*x td /nr 3kxvhasaches a traffic light. Make a statement concerning its acceleration.

  Suppose that a car traveling to the Wes8 )x74d1g9a4uv:nal lryed i zt (-x direction) begins to slow down as it approaches a traffic light. Make a statement concerning its acceler94yr:7d) 1iel4nd gaazlv8uxation.

  Suppose that an object is moving with a constant velocity. Make a statezcg*m):wcezl ) xa 96xment concerning its acce ael)c:z6x9 xg)mzw*cleration.

  If the velocity of an object is zero, does it mean that the accelera/82c (zg2mq lkdoez/wtion is zero2le wkc8m /(z2god/ zq? Support your answer with an example.

  Can an object's velocity change direction when its acceleration is contxh5z y c*f,n(y*5k p fprqf19stant? Support yourr *5f qk(9,1*zhxynpypf 5tcf answer with an example.

  Suppose that an object is mop6:pec5 mxx.a ving with constant acceleration. Make a statement concerning its motion with re5 x6pmapx :.ecspect to time.

  Can an object have increasing speed while its acceleratipm,8bv;q* dj -aj7tn8i 5xla6/f)fukmr x:ygon is decreasing? Support your answer with an examplejjt fxx idpv8n *, /5m8mb r)u f7qaak;6l:g-y.

  Suppose a can, after an in)ttwyo2g s71m itial kick, moves up along a smooth hill of ice. Make a statement1g tm2oy)s7 wt concerning its acceleration.

  Under what condition icd iby63 yxu4o317ly ns average velocity equal to the average of the object's initial and final vy4xc63 13b7y oduliynelocity?

  Objects A and B both start at lzu8gdabcz64 o c)34*t ms9ulrest. They both accelerate at the same rate. Howevlc4u4ba6*mczl8d3) toug9s z er, object 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 x 1ndd lmw45xqf 29rts 50sn9haccelerate at the same rate. However, object A accelerates for twice the time as object B. What is tshn 45s lq dx59mx0wtn2d 9fr1he distance traveled by object A compared to that of object B?

  When an object is released from rest and falls in the absence obi 5hsx)y0 *kkl 1aep0f friction, which of the following is true concernkh* asb lepyx0k)10 i5ing its motion?

  When an object is released from rest and falls in the absencp bwy2*0s d3yte of friction, which of the following is true concerning its*twd2 y sy0b3p motion?

  Suppose a ball is thrown straight up. Make a statement abi:lt lry(7/fnh 6(2wjmf y 2oiout the velocity and the acceleration when the ball reaches the/2fl(orli6 hf(2ty jinym: w7 highest point.

  Suppose a ball is thrown straight up. What is its acc vlcn 57znw/y.eleration just before it reaches its highes/yn 7nclz5 w.vt point?

  Suppose a ball is thrown straight up, reaches a maximum heige t1tcd.xbup99pcni 8 7gegj3dou* k *l++y7bht, then falls to its initial height. Make a statement aboutbdu pnyej7 tcbo*+8p g.k3l97 *txd u+ egc19i the direction of the velocity and acceleration as the ball is going up.

  A ball is thrown straight up, reaches a .d4na mwqmuakn;66+hl )enq/ maximum height, then falls to its initial height. Make a statement about the direction of the velocity and acceleration as n.6)4/q6n mqlnah+;kwm adeuthe ball is coming down.

  Suppose a ball is thronfy , ie(rm,2zw as;o)wn downward in the absence of air resistance. Make a stateme ysm),,2e;a nir (wzofnt concerning its acceleration.

  Suppose a skydiver jumps from a high-flying plane. What i7iwg oub6 /yx;,4hp tdi 4ph-ks her acceleration when she sheh,6p /d-x4p t gku4ohiw 7i;yb reaches terminal velocity?

  A ball is thrown ver1(-h u a:r; ff.(b e,ukfbfaawtically upward with a speed 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 se( bu-k.u;,afaaf :(w1ff bh recond 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 toyj*ipcdso.v( )zo5 c) p of a building. One second later, ball B is dropped from the sameo *cvz.5d )(pij scy)o building. As time progresses, the distance between them

  Ball A is dropped from the top of a building. One second later, ball y-e04/m-8iury it nkz B is dropped from the same building. As time progresses, the diff nk-4zyyui trim0 /e-8erence in their speeds

  Two objects are thrown from the top of a tall building. hou)fivu62, l2w 4 nos2 lm/ag One is thrown up, and the other is throww gmhn,2ul622o4u v)lf s/ oian 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 buil pjft i1* 2r/2 tic5xfejvu)z5ding. A second brick is thrown straight down from the same building. They are released at the same time. Neglect air resistance. Compare the acceleraterpfti)j2 uf t5 i152j/cvx*z ions of the two bricks.

  An object is moving with constant ae1r *8vfi3 drnon-zero velocity in the +x axis. The position versus time graph 3a*irrdv18 e fof this object is

  An object is moving with co-duv7t kt1vuvezq2b 8a: ( hr2nstant non-zero acceleration in the +x axis. The position versus timvaq2e h8t7 v1(tdub vkz -:ur2e graph of this object is

  An object is moving with constant non-zero velocity in the +x axis. The veloaqj 5j /f5a +cdd)yl(vcity versus time graph of thi5/j y(q 5cafaddljv +)s object is

  An object is moving wit,wcz zarn/ 4t) )jk+ns-;:qqujolna 4h constant non-zero acceleration in the +x axis. The velocity v-u ;j nankcj4 t+s)nar,/wqz z): oql4ersus time graph of this object is

  The slope of a position versus time g5+86o.s b9qq)ntl.3khu sv*kbc o xudraph gives

  The slope of a velocityvl7 i(kk5 i4nhqf,egv ),z wn9 versus time graph gives

  The area under a curve in an acceleration versus time n0f-7ab 8 hic/lqq, mwrbxz: 2graph gives

  The area under a curve in a velocity versus timelnr;d z).m6t8,pu 7i8 elpyto graph gives

  If the position versus time graph of an object is a horizontal line, the objecs9 tmto12z fzg :7pc:rt i zzscof1tg pr7t2m :9:s

  If the position versus time graph of an object is3ffhar 9ow)i 8 a vertical line, the object iswf 3ri)o8fh9 a

  If the velocity versus time graph of an object is a horizontal line, the objv l3g*x7 sy/ /1gn8cse,ans glect isg nlgvn/ 7*l3 cs ,agsy18ex/s

  If the velocity versus time graph of an object is a straight line making anfj5h*t:)q;zwoza l4z angle of 30 degrees with the time axis, the object ifql *5h4;zjz:tzaow) s

  An object moves 15.0 m north and then 11.0 m so0n+u xcq hn(w9uth. Find both the distance traveled and the magnitude of the displacement +(h xcwnqun09 vector.

  A boat can move at 30 km/h in still water. How lolv 0yb9y(.sr xku h5ci ; 5*)2oatfzthng will it take to move 12 km upstream in a river flowing 6.0 km/h?c ;thv)zt 5h*y2(9u o5xf. s0larbyki

  55 mi/h is how many mn8h3z wht+q p,/s? (1 mi = 1609 m)

  What must be your average speed in order to travel - huqs9 ttz)aa0 -3tx4wj,cnh 350 km in 5.15 h?

  A runner ran the maratho 8xcmmhu;.xm*xl9 t;r4) 9xs m0linewn (approximately 42.0 km) in 2 hours and 57 min. What is the average speed of the runne4 09rll8mhm.x; e;tn 9xu cwsxx*mi)mr in m/s?

  A car travels 90 km/h. How long does it take for it to travel 3fdh dxa os(:(400 km?

  A ly (light year) is the distance that light travels in one year. The .*vkhfw zdz+buf5 y wedk v*95 +g9li5speed of ligh y.wdfeg *i*5zv bu9l5v+dkw5 k9 +zhft 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 sidjcpr rt8-c0 ,k r*kba)zxc:7p e for 4.0 s, how far do you travel during this inatrkzcccb8:rj, *0-trapx)pk7 tentive period?

  If you run a complete loop around an outdoor track (400 m), in 100 s,eai59 0w 7wgtd8at8ia your average velocawde508a7ti 8wiatg9 ity is

  A polar bear starts at the North Pole. It travels 1.0 km south, then 1.0 kmnm v5pyw6+0r itbd i0/z*8skg 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 avi *05sd+ tig/pyvb0km8wr 6nzerage speed?

  A polar bear starts at the North Pole. It t 47pj(u lc p 4jlt 7d20.;40sjmdzmd*lfozaxqravels 1.0 km south, then 1.0 km east, then 1.0jaf0 jd m *lzx04(qdt2lu7 jo4ps;.d4pz7lcm km north, then 1.0 km west to return to its starting point. This trip takes 45 min. What was the bear's average velocity?

  You are driving home on a weekend from schooxe,a(3s8kao m+qle (nl at 55 mi/h for 110 miles. It then starts to snow and you slow to 35 mi/h. You ,xeem+o k a(a q(38nlsarrive 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 ;o yb*p4p*ucm 160 km at 100 km/h. What is the average speed of the motori;bmp*u y4oc p*st for this trip?

  A motorist travels for 3.0 h aoka :ozz/0ah8t 80 km/h and 2.0 h at 100 km/h. What is her averagea 0oz /ohz:a8k speed for the trip?

  An airplane travels at 300 mi/h south for 2.00 h and4pegjqdknd501m y)n : then at 250 mi/h north for 750 miles. What is the average speed for dge5yqjnn4 :p)d0k1m the trip?

  In a 400-m relay race the anc3xe mqt 5wv;(n,suqr,horman (the person who 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 team A runner not losemtu(nxv,q ;,esqr3 5 w the race?

  A car decelerates uniformly and comes7ve-aqe8sww+ 8 lf/ci to a stop after 14 s. The car's average velocity during deceleration7lea wc8wv-q+s fe 8/i 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, i;. vxr2o (zp1(buqwbat the average rate of 1rvozwq i(. (b2u;b xp$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h accelerates ati dcth h)yve71;8ei*e 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 accelerate ,ds pk);duv fzxwwtf *36lj06s 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 jz/ )40es a 7oyxt;bypspeeds up with a constant acceleration of)spbtoy04j;/ zxy7a e $2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initiarkh-z 2otx .n +;ga1lal velocity of 4.7 m/s experiences a constant acceleration o- ;k1t+a 2hoaznr.xg lf $3.0 \; m/s^2$. 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 of 568 m/s/4opa+ 4-dupdx8 zb:yum s*pl strikes a sandbag and penetrates a distance of 25.08 cm. What is t-ou 44y /+*lpxp8a bdz:u pdsmhe average acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is launched from a catapulk 5m:c gdw5s/6jcb7cnt on an aircraft carrier. It reaches a speed of 42 m/s at the end sk jw7 mcb6n5dg:/c 5cof 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 constanteffttx*, j9ko4 b8-eb26nrsy 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/s to 80 m/s in a dist5r:n i.j-qz trance of 200 m. What is its average accitr jzn:5 r-.qeleration?

  An object starts from rest and undergoes uniform accele4 1esuo. y)+oa y0+tyqlgzc i5ration. During the first second it travels 2.2 m. How far willqg+lz syi)o40 1a+ teuy.5yc o it travel during the third second?

  An object is moving in a straight line with constant acceleration. Initi -vz,sxoecg: +4;kyfkally it is travel c;z-v,x+g s4:okeykf ing 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 andwtrg5-6orzz7+nhe;f u k ,1h0x y yy1y 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 dry road can dect4ngwy9.p :a kovc5x9l r6+t kelerate 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 w/ oa,s2ahpk2that has been waiting at the intersection starts aheadpk, h w2as2ao/ 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 surfacw *e+f8cof+cj e of planet X where the acceleration due eowj+*f+8fc c to gravity is $1.5 \; m/s^2$. What is the maximum height reached by the object?

  An object is thrown upward with a s r8; dgl/i2ybypeed of 12 m/s on the surface of planet X where the acceleration due to gravit2b;dy y/gl8 iry 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 of planet X whsgstpab 4+ ;(oerss(tb apgo+; 4e the acceleration due to 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 wiul;)mbwo/) z9u 8xbdr th a speed of 14 m/s on the surface of planet X where the acceleration duexd l);wm)b9 zro8bu u/ 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 holg6jcf-nb3e *qva 0yw/ds a ruler between your fingers and releases it without warning, how far can you expectc0je/6-fa ybq3 ngvw* the ruler to fall before you catch it?

  A ball is thrown upward at a velocity of 19.6 m/s. What ;,y kyh5/j5x3xc rhi om r pqai*za7)(is its velocity after 3.mhy(r;,5 hii qypcakr 3 5a7xjx)*zo/00 s?

  A bullet shot straight up returns to its starting point in 16 s+e.*bx kdnl qh6sg0 p). What is the initiadg)p*6klnxbhqs.0e +l speed of the bullet?

  A ball is thrown straight up with a speed of 36.0 m/s. mv0x,hsyh0ypxik -k+64g, iu How long does it take to 0ix0ski-v4pkymg,, u yh6h+ xreturn to its starting point?

  A ball is thrown downward fromwldz t/4tyd)1d:mpz 7k :bj,b the top of a building with an initial speed of 23 m/s. It stripy z /,t4blbdwj1:k:)7 d ztdmkes the ground after 1.1 s. How high is the building?

  A ball is thrown straight up with a speed of 30 m dv*:zd.z9 ,w f0wy b0zd dcz-9zh8vgd/s. (only fill in numerical value in thzdz:z*y0v,9d - dvzz dw c0bg.fh8w 9de 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 with8 ;q ;xoto:i7rj(mgh t a speed of 24.5 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 10 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 10.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what is the velocity at t = 13s c.dwg7f8zmgjin +*.0 s?

  In Fig. below, what is the velocitt:z7 v5v2lr2vmb6)4b.mujpo r2 hexey at t = 2.5 s?

  In Fig. below, what is the velocia)e, 2yxel dc:ty at t = 4.0 s?

  In Fig. below, what is the velocit; wj)rgrugdzy/djx 1;dur4: l3j:;lfy at t = 5.5 s?

  In Fig. below, what is the average velocitqkda 52*/sc)scbz1g xy from 0 to 4.0 s?

  In Fig. below, what is the average jtli0s5i0 vqnp(w7 9gboa3a( velocity from 0 to 6.0 s?

  In Fig. below, what is *g/w bc b o3nv)t4qfzgh6d-. nthe acceleration at 1.0 s?

  In Fig. below, what is the ajbsh 1t; u5s4qk/ y3n-a .czzlcceleration at 3.0 s?

  In Fig. below, what d5g3c ln j.mk*,4-m(sqp nendis the average acceleration from 0 to 5.0 s?

  In Fig. below, what is t z*x-e+n4offohe average acceleration from 0 to 8.0 s?

  In Fig. below, what is the displacement from/-gnxo ny/-kjf m(iyjh2 ehqk:w3r., 0 to 8.0 s?

Does a car speedometer measure speed, 7fk x;3ymmsn6velocity? {speed|velocity}

  An object can have a varyingkl moio u( ct- hmd;y/l;v930n speed if its velocity is constant.

  The velocity of an object can be negative when its acceleration is positivetptcg cj-0c .38 b1g2zyd4yrap 96gsq.

  If one object has a greater speed than a se33be sf): ejeucond object, the first must have a greater acceleration.ujb3e) :fees3

  Two cars emerge side by side from a tunnel. Car 4( nzd9+bd vshA 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 accelerati (4*68)j yxkfznyvd gwon decreases.

  A baseball player hits a foul ball straight up intoq3 1g0b; kcscf the air. It leaves the bat with a spbgq1ccs;0f 3 keed 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 to igeeg(g1 dzv ./ ouh8;kts acceleration, how does it change if air friction is igdu zh/1e.e; vg( ogk8gnored?

  As a freely falling object speeds up, what is happening to its acl5.cgdo8i -(ut z.7mq6fe*nduh bv1sceleration, how does1 eq*7sv5ghi8u-fbdct.. lomndu ( 6z it change if air friction CAN NOT be ignored?

  An object that is thrown vertically upward will return wwrq 0wmivhir kpwv )u,oi:*. -16 7dgto its original position with the same speed as it had initially if air resistance is negligible. If air resistance is apprewvv.r*ui w7m-ww1io 0krhi)6 :gp, dq ciable, how will this result be altered?

  An object can have zero velocity and nonzeroyja7 1 h wdavxh2v8lzv) *qe0/ acceleration at the same time.

  An object can have nonzero velocity and zero acceleration at the same ti y)q) her5xm z86rovvl1:7eql me.

  An elevator moving from the second floor to the fifth floor making no sto0vzwth/h yqhjf v9de/h) 9- 3bps along the way has zero accelb y qhhz)dh /f/tj93-0 9evvwheration all the time.

  A rolling ball moves 2 uvh)l l)p,yvw/9 cecfrom $x_1=2.0 \mathrm{~cm}$ to $x_2=-5.4 \mathrm{~cm}$ during the time from $t_1=2.1 \mathrm{~s}$ to $t_2=5.3 \mathrm{~s}$. What is its average velocity?  (数值)  $cm/s$ (only fill in numerical value please)

  A particle at $t_1=-4.1 \mathrm{~s}$ is at $x_1=2.3 \mathrm{~cm}$ and at $t_2=4.3 \mathrm{~s}$ is at $x_2=8.2 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete laps aofyt 7u* okm3919dkgx round a quarter-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 frosza,y/ldtc-w mm ;q zz b(4zm(pbx; 70m its trainer in a straight line, moving 108 m away in 8.4 s. It then turns a0py s wmz /zam(bz-lc;mdq,x4(;7tzb bruptly and gallops halfway back in 4.6 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 froming,u8 tx a,q-dl fm :.to3j0p $12 \; m/s$ to $23 \; m/s$ in 5.3 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 i93qn p*eymj ;sh 7x7nxe syoz.;9)wu$23 \; m/s$ to rest in a distance of 67 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reac dl,j/cm4k +5armp5eo h a speed of $30 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $2.0 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinter can burst out of the blocks to essentially top spfyx rh811isru r-kr3x zwp11 )eed abouy rk p3u1 1is-8rw)rr1f1xxhzt $10.0 \; m/s$ in the first 13.1 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 fr m4 noo(tb 1rsla0ua-pxre1gql-l/0c kr 09o-om a speed of $16 \; m/s$ to rest in 4.57 s. How far did it travel in that time?  (数值)  $m$

  In coming to a stop, a car leaves vx j0t jf/5d8gskid marks 92 m long on the highway. Assuming a decelefdt v5jgj8x/ 0ration of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck goinjo;cof7g 6w(d a6sq +eznh)o *,wtyt5g $25 \; m/s$ 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 lesp 7wb 52).,yon ds *o5rnlsfuts than 30.0 min. After exactly 27.0 m),npy7nouf rsw*sob5 t l .d52in, 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?    $s$