Suppose that an object travels from one point in space to another.bl2e c0x* ae;l0u7g8 c9loicv Make a comparison between the displacement and the distance traveleg7 vl2; 0uci*l08ee acx oc9lbd.

  When is the average velocity lqnxz6k2b u,erz 0h*6of an object equal to the instantaneous velocity?

  A new car manufacturer advertises that their cx2b(ecz 0t1k , dy6kqrwc,.vdar can go "from zero to sixty in 8 s". This is a descriptizcdd6 qr,1yxt.(c2b, vk kew0on of

  An object moving in the +x axis experiencehdy ec.h .bbob7vr) ))s an acceleration of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to the East (+x direction) begins te +n*,fn9 qkcmo slow down as it approachen,nc *m9k q+fes a traffic light. Make a statement concerning its acceleration.

  Suppose that a car traveling to the West (-x diz/tz 4ybp(blrct /0pqqq+(- xrection) begins to slow down as it apptbx +qc-bq/rz y/pzq l0(4( tproaches a traffic light. Make a statement concerning its acceleration.

  Suppose that an object is moving with ug, hz7 *2bvana constant velocity. Make a statement concerning its accelerath2ab7g ,nv *zuion.

  If the velocity of an object is zero, does it mean that the acceleratio1*c eqybz9u y:n is zero? Support your answer with 9yczq :1*yeub an example.

  Can an object's velocity change(m0t5 d:zigcgu0 n ya9bz(o*e direction when its acceleration is constant? Support your answer with an e5g nt eg0 d9:z*ibc(0myaz(ou xample.

  Suppose that an objecle1imq+4o4he z0 kg fi97kd 7mt is moving with constant acceleration. Make a statement concerning its motion with respect toi9eh +7kmgmq0z4 7if 1ekd4lo time.

  Can an object have id. 3c.xkuw1xp:d1z; gepijg/ :r 1mx gncreasing speed while its acceleration is decreasing? Support 1:/ 1 :mxiexku x.dp3;1prwzggc.gdjyour answer with an example.

  Suppose a can, after an initial kick, moves up along a smozdxabva*+.j6 oth hill of ice. Make a statement conca*6 +vdjaz.xb erning its acceleration.

  Under what condition is average velocity equal to the averluttu 1- e f t,f1trhe9u/*un,age of the object's initial and tn he/tleu,*,uut r-f 9fut11 final velocity?

  Objects A and B both phe 09yijm-p5 start at rest. They both accelerate at the same rate. However, object A accelerates f09yh5ie jppm-or 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 bomku(ne4i *y6 s3w: goi9gzd-p/plh q* th accelerate at the same rate. However, object A accelerates for twice the time as object B. What is the distance traveled by object A compared to th46ylpsd/ upw ig ei*9*hn: mq3(gz -koat of object B?

  When an object is released from rest and falls in the absence of frictiof n 606q4 4omb.cgld2yqq 4hcqn, which of the following is true concerning its motio6y qmg f0 lchcqb oq64424nq.dn?

  When an object is released from rest and falls in the absence of friction, which(kwl: w;qae04guku 5 fg:qm b8 of t 0 u: :mb(kgk4g5fuwwqla;8e qhe following is true concerning its motion?

  Suppose a ball is thrownep ghw .zoj b:ui,2*-o straight up. Make a statement about the velocity and the accelerationojih o:*zgu2p b. ew-, when the ball reaches the highest point.

  Suppose a ball is thrown straight up. What ikaay(0 ,uuky0(, ezyr dib6 8os its acceleration just before it reaches its highesty z0,r8 i,d0y((a uoa6uky bke point?

  Suppose a ball is thrown straight up, reaches a maximum height, then falls to xuet,yl cm204cn1wd1its initial height. Make a statement about the direction of the n1d,y 4tw2e1u cmc0xlvelocity and acceleration as the ball is going up.

  A ball is thrown straighs; t(k;ae o-;ffnx +xbt up, reaches a maximum height, then falls to its initial height. Make a statementxb-;;e(s;off +akx tn about the direction of the velocity and acceleration as the ball is coming down.

  Suppose a ball is thrown downward in the absegy /u:cx ,ajn(nce of air resistance. Make a statement concerning its acceleration.n : u/gyja(xc,

  Suppose a skydiver jj(6ebn *bjb gj1kvlj+m i 9e47umps from a high-flying plane. What is her acceleration whev49*jbjk e +6in1m7bb jegl(jn she she reaches terminal velocity?

  A ball is thrown vertically upwardc/ rj0nlczau,clg8 krc *: 91d 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 second ball to that of the first ballrcc/*0gu8:d l alj krncz1,9c ? (How many times higher does the second ball go than the first ball?)

  Ball A is dropped from the top of a building. On90t ofu+z+cu je second later, ball B is dropped from the same building. As time progrefj +u9ut ozc+0sses, the distance between them

  Ball A is dropped from the top of a bu8cpc/nesmf4mdj 62-4 nb .nhkilding. One second later, ball B is dropped from the same building. As nem/ n ckdc4fh4mb.-8 pj6s2ntime progresses, the difference in their speeds

  Two objects are thrown from the top of a tall building. One is thrown up, and )ct)ufglitpvu ,t4ei 2)jp5 :4 iwde( the other is thrown down, both with the same initial speedp iiewc)t:g)ijtuv 4 ,t) u e5(24pldf. What are their speeds when they hit the street?

  A brick is dropped from the top of a building. A set 6 sf,3ap/spkic l70ucond brick is thrown straight down from the same building. They are released at the same time. Neglect air resistance. Compare the accelerations of t, afks/0u pt6csipl73he two bricks.

  An object is moving with constant non-zero velocity in the +x axia0bft e u0updh0f; jowy, ,42g7elrs4 s. The position versus time graph of this object ,yo d,7fte ;pehuu 42bj00wsrga0l4f is

  An object is moving with constant non-zero accee/x(7 plj a7ps3zg.cdleration in the +x axis. The position vergd/ lj.x 7cap(3e z7pssus time graph of this object is

  An object is moving with constant non-zero velocity inj43m;wnakii kqtt+i a17g )y1 the +x axis. The velocity versus time graph q mi3ga) ti+n kywi147tk1j;aof this object is

  An object is moving with constant non-zero acceleration in the +x axis,kqj sd 2g15wp. The velocitsj d wqk5,21gpy versus time graph of this object is

  The slope of a position vt r6 jamj:m. z1kb(w0kersus time graph gives

  The slope of a velocity versus tih1z7f;a-yfkcngg :t3 me graph gives

  The area under a curve in an acceleration versus time graphfvhp* j;y -4gr gives

  The area under a curve in a velocitrm,l60 fm7)tk t5 tk v;)yxhwry versus time graph gives

  If the position versus time graph of an object is a horizontal line, the obe)hu q+ztg 42 zm4bky7ject 4+m4he)t2q z 7kgb yzuis

  If the position versus time graph of an object is a vertical line, the objecqm4/ro pdm4h ofk +th (;9vo:vt is :thk9+v;vfq moroodm/ p(44 h

  If the velocity versus time graph of an object7rz1ib 6p5m.oid x+m teuj5q- is a horizontal line, the object iumoi1jq mtrbz . 576i5e+px-ds

  If the velocity versus time graph of an object is a straight line my ccnw69+ up4 jk mj0ve(cu07kp ,hha uqt,;i.aking an angle of 30 de4m+ up0 ;kukw6vuj.c7yi(j 0apth qh,enc9,c grees with the time axis, the object is

  An object moves 15.0 m nor6o+z4fos q,. y 9e8(whjomrs dth and then 11.0 m south. Find both the distance traveled and the magnitude of the displacement foe94mj,rowd s +ysqoh8 6z(. vector.

  A boat can move at 30 (c7obu 9gq 2oq;t4rmo km/h in still water. How long will it take to move 12 km upstream in a river flowin4 t;(c o7qmuqog92rbog 6.0 km/h?

  55 mi/h is how many m/s? (1 mi = 1609 m7fbk)l1r iz( d)

  What must be your average sd7awl1i4ir )z 20vyog7ea .gr peed in order to travel 350 km in 5.15 h?

  A runner ran the marathon (approximately 42.0 km9 c ss8go 6*(6r9z4pmppixyaq) in 2 hours and 57 min. What is the average sazxrg c 4y96p8op*9m6s ( pqispeed of the runner in m/s?

  A car travels 90 km/h. How long does it take for it to trrep2cg-bv 6r .ne;z1yavel 400 km?

  A ly (light year) is the p:o)8 i,hbc j0c4ikzsdistance that light travels in one year. The speed of lightjpboh8zk4)i,c 0 sic: 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 mrgl, s8pw(p,mh6mb))yh5k ithe side for 4.0 s, how far do you travel during this inattentive pe, i,8mrpylg k6(h)5hmmb )wp sriod?

  If you run a complete loop around an outdoor trac0z ft5,pw y sc4k(e ,8z r6n.hwqngo)uk (400 m), in 100 s, your average veloci ,np6s,qwctuz5 yofk)w8 (0h4 z .nrgety is

  A polar bear starts at the North Pole. It travels 1.0 km south, t4cs9s8s m+/:szeo c/fasbe1 khen 1.0 km east, then 1.0 km north, then 1.0 km west to return to its starting poin/ssbocs sfaee:m/+ z c 9ks814t. This trip takes 45 min. What was the bear's average speed?

  A polar bear starts at the North Poleuq5x4ox9hs3vg fht -c1ubr)0 . It travels 1.0 km south, then 1.0 km east, thenxou9gs t3x4vrubhfq1-0c)5 h 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 velocity?

  You are driving home on a weekend from school at 55 mi/h for 110 mi(g t.xhkkn/zb5wao9,j-0cvg les. It then starts to snow and ok /zcwx va 0ng.(b,-hj9g kt5you 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 *z-j -skje lb-9a wv*hn,cej1km/h. What is the average speed of the motorwbeh z-enc9-- ,lj1v j*ks*ja ist for this trip?

  A motorist travels for 3.0 h at 80 km/h and 2.0 h at 1 es:f*)wi jo:a1r jyn7nh: 9hz00 km/h. What is her averagefe9 z*h arw1 :hon:s):jyj ni7 speed for the trip?

  An airplane travels at 300 mi/h sou mal1o a tg18bq1lxg9(th for 2.00 h and then at 250 mi/h north for 750lg gtaq1xlo m a8(19b1 miles. What is the average speed for the trip?

  In a 400-m relay race the anchorman (the personivqvz63m7u*o 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 tea63o*ivz vuq 7mm 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 s:9hpz:nm yw(si*zjl *top after 13 s. The car's average velocity during deceleration was 32 km/h. What was the car's deceleration while syip9*lhzm: (nwz*:s jlowing down?

  An airplane increases its speed ui r3 tntjuz 87:bb0;mfrom 100 m/s to 160 m/s, at the average rate of 7j 8 b;0umzbr3t itun:$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h po8h2ir2w p1 2sawhj2accelerates 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 d(+3 rpw. .daobau tl-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 yy n kx)+b:(jjspeeds up with a constant accelerationk )n:jjyyb+(x 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 5.2(w( ggzi5uc :r m/s experiences a constant acceleration of : 5u gwzrc(i(g$3.5 \; m/s^2$. What is the cart's displacement during the first 8.9 s of its motion?

  A bullet moving horizontally to the right (+x directiobvkj ub)nkn+ m y8:f2 z9- nuc.of4p8tn) with a speed of 472 m/s strikes a sandbag and penetrates a distance o-n8: c9fkynt) .mu2vpnoj+bfb4z uk8 f 25.44 cm. What is the average acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is launched from a catapult on an.bo4m z;ws7 jt 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 7m ;jzo.t4w sbcatapult?

  A car starting from rest moveskhtvu/ 1:tv3e with constant 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 distance of 200 m. k((jqeb :3hpt What is its average accelerp3:hqkje (( btation?

  An object starts from rest and undergoes uniform acceleratiotw2t)i7 )w8 pranr/sm v n 9mms4q2ed,n. During the first sec tn7sra)/rtw mmv2w niq epd892,s4 )mond it travels 8.1 m. How far will it travel during the third second?

  An object is moving in a straight line with constant acceleration. Iiebu (i;a r6ydv q./fl/b ilyg.)9q5pnitially it is traveling aai.qii6.l gvybfp(e;y u)qbl //dr 59t 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 accelerat:nm,a0g :i dxqxuzxef /-zu3-dhi+/ l es 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 dry6gt8)3/z parj ;ekdmi 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 xski l/zwn.: ; kwoj:*waiting at the inz :o. siwkxl /:jw;kn*tersection 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 speed of 12 m/s on the surface of planet/-/6oplvue fgqh0i5dji5,up X where th5j qu6g/io,pp l0vue-/dihf 5e 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 g: -ri2vv6 e iw3 ycl25o2dfaeplanet X where the acceleration 5l:fv2iy2iwee 26agcrv3 o d- 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 thezc -eeabnl/ e c(156glao)7rs surface of planet X where the acceleration dulocnz5/ea( rac ls)67b1 eg -ee 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 with a speed of 14 m/s on the surface of planet X 6zn.r n+ibmnbn)bp00 wheremzbb0i6 rpn +n .bn0n) the 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 frix,c48g7 f3yq .vtymt eend holds a ruler between your fingers and releases it without warning, how far can you expect the ruler to faqgyy3 cxtt48,m. v7fe ll before you catch it?

  A ball is thrown upward at a velocity of 19 e 5rnb tuq8h-2bezv/ d,h(sn4.6 m/s. What is its velocity after 3.0su(ht vznb5 2rq8-ebh4e /n, d0 s?

  A bullet shot straighf-mqpp61f3 7zgxdvgk+z( co t. ml5* ht up returns to its starting point in 6 s. What is the initial speed of the m gx31z vmp.ckf+(og5p* dflztqh7 6-bullet?

  A ball is thrown straigh0l 1njq5 ywr13eon ; yai3hrb,t up with a speed of 36.0 m/s. How long does it take to return to iy1a 3rn 3qn,wlo;0hj51 e iyrbts starting point?

  A ball is thrown downward from the top of a building with an initichfgarmehe 5(u45 9z ,al speed of 27 m/s. It strikes the ground after 7.3 s. uh5ha,4ec5fg9( e rzm How high is the building?

  A ball is thrown straight up with a speed of 30 m/s. (onl gunlp, b4h,:urg s)g;y fill in numerical value in4 :s)pgggn;,rhbu ,lu 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 str xmkiiph*;1dfyv7u: ks9xp 5ff8a5s5 aight up into the air with a speed of 40.2 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 15 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 15.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what is the veloc,vp1z/,bj4ylau ld7i ity at t = 1.0 s?

  In Fig. below, what is the velocity at q2r,llv0imk 0zn s*1w4l a3vs t = 2.5 s?

  In Fig. below, what is the velocity 8v4zhp8)x2 p) sz yjvxx+.cjtat t = 4.0 s?

  In Fig. below, what is the velocity at t = 5.5 :noa ((tou5jkvd h*3po:1njvs?

  In Fig. below, what is the average velocitwghqkm5*ejocwu2asm0dbys 5** z, 91y from 0 to 4.0 s?

  In Fig. below, what ivn4;zd ns (0xgs the average velocity from 0 to 6.0 s?

  In Fig. below, what is the acceleration ahk82 9 ly7xwggz;z1aat 1.0 s?

  In Fig. below, what is the*h/f;+dnu t9 -f fvvph acceleration at 3.0 s?

  In Fig. below, what is the average acceleratiiv4rwd76y.vod6 j +u jon from 0 to 5.0 s?

  In Fig. below, what is the average (jmg xrl6p o).acceleration from 0 to 8.0 s?

  In Fig. below, what is the displacemel+4 b;tzg kji0h)tn d;nt from 0 to 8.0 s?

Does a car speedometer measure speed, veloc oe-/vu snj/:f.n/ysgity? {speed|velocity}

  An object can have a varying spef sh00 u;)qetded if its velocity is constant.

  The velocity of an object can be n1v 7*oo45wr+en t +xx b5dd+,3h akfbacurg0negative when its acceleration is positive.

  If one object has a b4 -qwum36/e fxja6bcgreater speed than a second object, the first must have a greater acfm/qu6w- x ea43cbj6 bceleration.

  Two cars emerge side by side from a tunnel. Car A is travd c5x*bmv8 ip,f9t6 hny d*+jkeling 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 p6s f-a -4n c-m 7q i8ukxquwrx/-t)vnits acceleration decreases.

  A baseball player hits a foul ball straight up into the air. It le iw,n rotw,7)5 tara5daves the bat with a speed o7rt tnw o 5ia)dw,,5arf $120 \; km/h$. 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, whatbtf:zow: r6mib1w5t 1 is happening to its acceleration, how does it cz w5b:wrbi1mo6:t1 tfhange if air friction is ignored?

  As a freely falling objec;y pz; z y p6rn8nfv/usv9j+t7t speeds up, what is happening to its acceleration, how does it change if air fricti;8y t pvzrns/fjvn76y 9p+zu; on CAN NOT be ignored?

  An object that is thrown vertically upward will return to its o2i1* j;)wp6s mhw n:z dpy+rtvriginal position with the same speed as it ; i 1hs*2p6n d):wrptyw mvj+zhad initially if air resistance is negligible. If air resistance is appreciable, how will this result be altered?

  An object can have zero velociuhde*kt*f(;j* a/c6jaia 6yw 1b2 u chty and nonzero acceleration at the same time.

  An object can have nonzercvra0uy50nde.bzp0 , o velocity and zero acceleration at the same time.

  An elevator moving from the second floor to the fifth floor makingy ygudg4k guq*nns, a: *+3n9f no stops along the way has zero accgk+y 4y*dnn*ug9:a3 u sf,gqn eleration all the time.

  A rolling ball moves from 6imux1d )ue(c*f2c u a$x_1=2.1 \mathrm{~cm}$ to $x_2=-6.2 \mathrm{~cm}$ during the time from $t_1=2.5 \mathrm{~s}$ to $t_2=5.1 \mathrm{~s}$. What is its average velocity?  (数值)  $cm/s$ (only fill in numerical value please)

  A particle at $t_1=-5.0 \mathrm{~s}$ is at $x_1=2.9 \mathrm{~cm}$ and at $t_2=3.1 \mathrm{~s}$ is at $x_2=8.2 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete la yul6fbu wj,k2*m4sj* ps around a quarter-mile ($1 \; mile = 1609 \; m$) track in a total time of 6.0 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 93 m amt b,l+),bve j+.jo dtway in 10.1 s. It then turns abruptly and gallops halfway bacvtm lob, +j .b+jt),dek 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 fro ksx6hr yxum;zbx-7w) zjt-:.m $13 \; m/s$ to $22 \; m/s$ in 5.1 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 t 2f;5q4mlbjo8jmdg; $20 \; m/s$ to rest in a distance of 78 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reach a sgk3*:lb*l5 4p lxae sm,g k,rspeed of $29 \; m/s$ 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 bp:3 cc7q(vw aburst out of the blocks to essentially top speed about3accqv( :bpw7 $10.6 \; m/s$ in the first 10.2 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 unifor5im *uax.51g b kqy- ;q8czfbymly from a speed of $17 \; m/s$ to rest in 5.40 s. How far did it travel in that time?  (数值)  $m$

  In coming to a stop, a car leaves skid marks 92 m long on the h9 bwt :hytp/k:ighway. Assuming a deceleration of hy k9t:/tpb: w$7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck gn28tp h-38jx 2xgdxn9q2moll oing $25 \; m/s$ 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 less than 30.0 min. Afted 0,al (bhn vg6fd zuc+fm3cx) 00xyl6r exactly 27.0 min, there are still 1100 m to go. The runner must then acceleramduhl3fc0cgdz+nbx0 y60)6 l, xfv (ate at $0.20 \; m/s^2$ for how many seconds in order to achieve the desired time?    $s$