Suppose that an object tr;yzs0p4)5dw9 tbhx og xj*xz8 avels from one point in space to another. Make a comparison between the displacement an84hopxxz* )jz 05dbt gyswx;9d the distance traveled.

  When is the average velocity of an object equal to the ih ,rh: (j.rl b3xfqf;onstantaneous velocity?

  A new car manufacturer advertises that their car can go "from zero t1po)n k3r li -;*s-dx/bjwwk po sixty in 8 s". This is a description ok/i-j w- po; 1k3dnx l)swbr*pf

  An object moving in the +x axis experiences an acceleratorg-f ao+p.c;ion of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to the East (+x direction) begins to slow do:p36x-j)w;l1tzc pn6mcsu 2p quc6o hwn as it approaxowc -p6c mp16u:sz2q3l;phu )t 6njcches a traffic light. Make a statement concerning its acceleration.

  Suppose that a car traveling to tu90xn-;uead xy/3 wnwhe West (-x direction) begins to slow down as it approaches a traffic light. Make a statement cww03; un axd-/ueny9x oncerning its acceleration.

  Suppose that an object is moving withc :t.nkdti7 1wu1vcdcd),3kn0 dn v6 l -lff6l a constant velocity. Make a statement concer 7nndt0 1d.) u3lcn: 6cfkl v tf1iv6,dwkc-dlning its acceleration.

  If the velocity of an object is zero, does it mean that the acceleration is ze0u4(mu jc4n ygro? Support your44cung j yu(0m answer with an example.

  Can an object's velocity change direction when its accelerationjwy4 l 5+ut,y8caf0oj59uh gds*qo p. is constant? Support your answer with an exsg5o toj.ap54 u0yfw yuj9dc*,ql8h +ample.

  Suppose that an object zq1ufzdl 7vj15v/0l wis moving with constant acceleration. Make a statement con zd/v1l5vu w7 jfl1zq0cerning its motion with respect to time.

  Can an object have increasing speed while its acceler/.xaj 2in(a4f(e.z hhzydp-m ation is decreasing? Support your answer with an nfah(z d- yzea.(jh4xm.2/i pexample.

  Suppose a can, after an initial kick, moves up along a smooth hilla; n8b yf ;9.eq qmk4bz*xw51tm irjc5 of ice. Make a statement concerning its aca89n . ;xbqyr* 1ic;kz5jbf4q5e mwm tceleration.

  Under what condition is average velocity equal to the average of the obj c4g/rcjkp c;pyell66rmn9 0.0c 9esuect's initial and fi g60yps6e /e.; jcmc909 lcrnclpur k4nal velocity?

  Objects A and B both staris/qc/+s. 5 wv nhg(mzt at rest. They both accelerate at the same rate. However, object A acceleratwv.(g s 5/hicmzs/+ qnes 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 at the same 7y;egde4r 5kz 1lp (ymrate. However, object A accelerates for twice the time as object B. What is the distance traveled by egykpr5ed;zmy 71 l4(object A compared to that of object B?

  When an object is released frocthhw t(:8;cntsi c+l0dy : x3m rest and falls in the absence of friction, which of the following is true concerning its mx 0+ d:hc3t(cth8ylcnw;:s itotion?

  When an object is released from resmdwf)0ul.e j ymbyl200iu h 5+t and falls in the absence of friction, which of the following is true concerning its mot lfy0l+hd 0ieb0). y52uj uwmmion?

  Suppose a ball is thrd-842t sh he968cuwmpijdx1 hown straight up. Make a statement about the velocity and the accex8 wp1d6teu4jh i 29hd-scm 8hleration when the ball reaches the highest point.

  Suppose a ball is thrown+ bfhz)dk.1 eqt: /odg straight up. What is its acceleration just before it rtgd b/h.q:o)z+df k1e eaches its highest point?

  Suppose a ball is thrown str ur8j 2+m,f qto0cbz)xaight up, reaches a maximum height, then falls to its i q8or f,cmt uzxj0b)+2nitial height. Make a statement about the direction of the velocity and acceleration as the ball is going up.

  A ball is thrown straight up, reaches a maximumr/yam o 2li:e, height, then falls to its initial height. Make a statement about the direction of the velocity and acceleration as ta/ y,irem 2o:lhe ball is coming down.

  Suppose a ball is thrown ienr8frc r8c(fkwg cyq-1*** downward in the absence of air resistance. Make a statement concerning its acce cn r1(ywiekccf * r*88fgq-r*leration.

  Suppose a skydiver jumps from a high-flying plane. What is her acceleratu t/ai;ci 86lwl z+kt)ion when she k)tucil a8t+ z;6w/ lishe reaches terminal velocity?

  A ball is thrown vertically upward with9p :16jpjwps.a )1tgsz l, helz/gn v7 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 ball? (How many times higher doesls.61z ,a7 jnge:t 1 jw9/phzp) gpvls the second ball go than the first ball?)

  Ball A is dropped from the top of a building. Onep81 i o+d j41-uxxuzix second later, ball B is dropped from the same building. As time progresses, the distance betwee4x+zx piidjuu1x -8 o1n them

  Ball A is dropped from the top of a building. ,8e ** hv+itev4-id bmtqzt9 s One second later, ball B is dropped from the samee9tvvttmi8*eqi *4,hb -szd+ building. As time progresses, the difference in their speeds

  Two objects are thrown from the top of a tall buildinj6/gvq,1e0 a rhwgl6 pg. One is thrown up, and the other is thrown down, both with the same initial speed.p,1rawqvh0 j/g l e6g6 What are their speeds when they hit the street?

  A brick is dropped from the top of a building.k. -/f aetk7mz A second brick is thrown straight down from the same building. They are released at the same time. Neglect air resistance. Compare t fz.atkm/e7k-he accelerations of the two bricks.

  An object is moving with constant non-zero kbb2d; xs)55bzbdsro o2mf 0 1velocity in the +x axis. The position versus time gradk;5 sbdr b)2b z15 x2fo0bomsph of this object is

  An object is moving with constant non-zero c/ mfr,l2wz0+e :ufhow s+4(c0xsl azacceleration in the +x axis. The posi4w02aufzlcr+/ e z ocss:lw+f0h(x,mtion versus time graph of this object is

  An object is moving with constok.d607og t qrni: h:xant non-zero velocity in the +x axis. The velocity versus time graph of this object isi ngdxr o k.:t0q7h:6o

  An object is moving with constant non-zero accelera c)zjo6 d(jy1i:gr7.vyp 2huztion in the +x axis. The velocity versus time graph of this obg2)u:6r c idojy1 hvp7zy(j. zject is

  The slope of a position versus tx8 34rgw wto;gime graph gives

  The slope of a velocity veus x(0ua:- 1y y9noqogrsus time graph gives

  The area under a curve in an a2yd(pj ph0j5 qcceleration versus time graph gives

  The area under a curve in a velocity versus time2vy0ass g w)b/vd*mf- graph gives

  If the position versus time graph of an object is a horiz2b tq2h97oohjv )pxh e7g-h ;uontal line, the object isvejx2uht;h7h pq2 7go9b- ho)

  If the position versus time graph of an object is a vertical line,v- k9bqb n;+dro xb0:f the object isv -:+orq 9nbb k;f0bdx

  If the velocity versus time u 1y/krs;v 3,g9 yflwz6 lqf9dgraph of an object is a horizontal line, the object isqy ulk/l1;dy 99 s,rf 3vwzg6f

  If the velocity versus time graph of an object is a straight line0xy/3i2n vxn;uc2ik yhw */ ng making an angle of 30 degrees with the time axis, thcngyi0u*y2nn/x/kv ixw2 ;h3 e object is

  An object moves 15.0 m north and then 11.0 m south. Find both thiyhb+ mymu )udic-1l ri, e :*(o9fun/e distance traveled and the magnitude of thehd-eu:i+o y* i fum(lcu,/r1ynbi 9)m displacement vector.

  A boat can move at 30 km/h in still water. How long will it take to move 12l yxv4qq0c*w. km upx. yc04qlq*wv stream in a river flowing 6.0 km/h?

  55 mi/h is how many m/s? (1 mi = 160e2,:rml dvp c/9 m)

  What must be your average s-*q n:hftui8/qo d-ls c42 xltpeed in order to travel 350 km in 5.15 h?

  A runner ran the marathon (approximately 42.0 km) in 2 hours and 57 m/,i teivri a.c 59/whnin. What is the average speed of the runv r/w,iia /.ne5c th9iner in m/s?

  A car travels 90 km/h. How long does it take for ia / hhq,9bv,phqcp, h3t to travel 400 km?

  A ly (light year) is the distance that light travels in one ye4 lf5ps3d* 3nyq3a1zn2lzcm z ar. The speed of light mz 4*q f z1 na5y2dlpcl333zsnis $3.00 \times 10^8 \; m/s$. How many miles are there in a light year? (1 mi = 1609 m, 1 yr = 365 d.)

  If you are driving 72wc5t9 3 kecvx/ ia;*sc km/h along a straight road and you look to the side for 4.0 s, how far do you travel during this inattentive periodcxviw a/k;*3etcs 59c?

  If you run a complete loop around an outxwmnyfb +n9c72fhv +yfi8i3g5cp l - 1door track (400 m), in 100 s, your average velo25y9f3bf vxyi g n+i8p1hc-nfmc+l7w city is

  A polar bear starts at the North Pole. It travels 1.0 k 9ulx46jb5z6dn (rgv0yeft j8m south, then 1.0 km east, then 1.0 km north, then 1.0 km west to return to its starting poi l5r0nfzu xd8 v bjg6t94y6j(ent. This trip takes 45 min. What was the bear's average speed?

  A polar bear starts at the North Pole. It travels 1.0 x fpyju5/ a*h jga)f(7km south, then 1.0 km east, then 1.0 km north, then 1.0 km west to return to its starting point. This trip takes p* 5fjh)xaua7/ygfj( 45 min. What was the bear's average velocity?

  You are driving home on a weekend from school at 55 pp m832 tzf4fhmi/h for 110 miles. It then starts to snow and you slow to 35 mi/h. You arrive home after driving 4 hours and 15 minute2f ztfp3mp h48s. How far is your hometown from school?

  A motorist travels 160 km at 80 km/h and 160 km at 100 km/h. What is the avern+z c7o2 zik *ka4qmx/age /k2 xzc7zm*k a+o4nqi speed of the motorist for this trip?

  A motorist travels for 3.0 h at 7bgnbw0 uv4z 080 km/h and 2.0 h at 100 km/h. What is her average spz wbgun704b0veed for the trip?

  An airplane travels at 300 mi/h soltv2uz ( h80pyuth for 2.00 h and then at 250 mi/h north for 750 miles. What is the average speed fl hp2tz8u0(yv or the trip?

  In a 400-m relay race the anchorman (the person who runs the last 100 m) for tec/h4t0fvvx9mr sp (-a am A can run 100 m in 9.8 s. His rival, the anchf /marhc(4 -9t vspvx0orman 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 after 13 s. The car's av dp)/h,,yuorr*ri9 zxerage velocity during decelerr,,/ 9 oydpui* rxh)zration was 65 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 aaq)(gj6c8+/.*hp hwfe luf r nverage rate of h *)(.h u ec6fjlwg/rp8f naq+$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h accelerates 7k::uegdsls(xk /+8(dtzz ,um qtct 5at 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 acceleratpq (huwz)78ljes 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 accz5 +zg7lpws:peleratiop lswzzg5p: 7+n of $2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial velin/ 8/i*vnv wul rmzrb.1s )5eocity of 3.9 m/s experiences a constant acceleration of mi/wbz.svenn)5/v8*li rru 1$1.5 \; m/s^2$. What is the cart's displacement during the first 8.0 s of its motion?

  A bullet moving hori uk:y5vy9lk,4 ni vom0zontally to the right (+x direction) with a speed of 345 m/s strikes a sandbag and penetrates a distance of 23.43 cm. What is the average acceleration,u9vynmk0:ovl4 yk i5, in $m/s^2$, of the bullet?

  A jet fighter plane is launched from a catwow7 ::7mgr-* (7rztki nhluaapult on an aircraft carrier. It reaches a speed of 42 m/s at the end of the catapult, and thi77* kwa-o7wuzhnr: (mgi ltr :s requires 2.0 s. Assuming the acceleration is constant, what is the length of the catapult?

  A car starting from rest moves with5jopi 6lv z ckfytr(bo7y j(y.-u1f*7 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 80xgnc74t/6govle - jt5:*qvjc m/s in a distance of 200 m. What is its average accel* 6jejvlgcv/4 :5c g- txqtno7eration?

  An object starts from rest and undergoes uniform acceletf6x-q tf 2rw/ration. During the first second it travels 9.6 m-f6/r2tqf tw x. How far will it travel during the third second?

  An object is moving in a st ego6kl w:f01iraight line with constant acceleration. Initially it is traveling at 16 m/s. Three seconds later it is traveling atlk0ei6o:1g fw 10 m/s. How far does it move during this time?

  A car starts from restwt0 mr* hl k9-+dak2yp 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 o9owm s;bhn2l sin3zr8n qd( 6(n a 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 turns green, a car that has been waiting at the ia7:,c(j e4h )pdej,rked si9hntersectio9 ieeeadhr 7sp:c ,)d kj,hj(4n 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 surfe9( irau4jly 7rcn0cr ;g*u)wace of planet X where the acceleration9 4giec unru(w7l)*rcr 0yaj ; 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 pla g86+qe+vnp d xueywtr/x41*r f t5h*cnet X where nxwdrf*p c y x5et*6u1+48+vg /qtreh the acceleration 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 brdft xwkpu0n g* g fw0v659pb4zh69-on the surface of planet X wherkr0 wd g65g- fb0z*v tw b499nhfpx6upe 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 with a ,oo-ktnwb i;2 speed of 14 m/s on the surface of planet X whe;iboo-k t, 2nwre 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 h e+uq9 c;we8ms. If your friend holds a ruler between your fingers and releases it without warning, how far can you expect the rule;9qemw 8 hecu+r to fall before you catch it?

  A ball is thrown upward at a velocity zz lokt2m r-7 *;dzbixx.17gqof 19.6 m/s. What is its velocity after 3.q ri7 ;. dzt*kzm1xgbz2l-7xo00 s?

  A bullet shot straight up returns to its starting point in 5 s. What is t ,dp iba c2ysi6em//y6he initial speed of the bullet6y6acepmb y2i/sd /,i?

  A ball is thrown straight up with a speed .c0zhz*( sj 8ni9s snfof 36.0 m/s. How long does it take to returzn9.8sicfj(h0 s s*zn n to its starting point?

  A ball is thrown downward from the top of a building with an initial speed of 2r 0icsazv* f 8etd5+ oyii89d-r9iev)7 m/s. It strikes the ground after 2.8idi+c irre z 5tf80o89 idyas)v*v-e9 s. How high is the building?

  A ball is thrown straight up with a speed of 30 m/s. (only fill in numeri:t2vo nmgd :ut1l. yb*cal value in the blanks) ub2.v1d ty :*lntgo:m
(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 ai/ sr.dfo;d;tyk 1ql c4r with a speed of 22.3 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 11 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 11.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what is the velocity at t ,8m-gbclscs5ikhtp 43 ( h. mn-p6wvv= 1.0 s?

  In Fig. below, what is the velocity at t = *.kxk ,k8kkk 1tnbqxn9ud (4s 2.5 s?

  In Fig. below, what is the velocity at t = k bi(.kp/+ dsr-au47yqru)gkkt 2kj td * 8cn74.0 s?

  In Fig. below, what is the velocity at t = r n3z ;j cp)+1cui*nsxsvq.)u 5.5 s?

  In Fig. below, what is the averagevac1* na ql03om8fbgc -t( ur0 velocity from 0 to 4.0 s?

  In Fig. below, what is the average ve -c,xa3/7*xces c7 dumsnof.zlocity from 0 to 6.0 s?

  In Fig. below, what is the t )nc8qdk/h1og 6vh pnnwh18w k,ba97acceleration at 1.0 s?

  In Fig. below, what is the acceleratio :4mo9ydfkk- 5hgb.zr/9gd 1r6iom wyn at 3.0 s?

  In Fig. below, what is the average acceleratmu2;9a9f;t. khw *dumy y6od uion from 0 to 5.0 s?

  In Fig. below, what lh8z eoiqe(n k7e92hmuf -d 7z58m/nnis the average acceleration from 0 to 8.0 s?

  In Fig. below, what is the displacement from 0 to 8.0 s?tgzv( 0c4 fg37jsq-it/z71 zodh tlqz 2h.lm0

Does a car speedometer meagh h/6f7a0) lf9yl 3t: wumczqsure speed, velocity? {speed|velocity}

  An object can have a varying snp1- 6mz ;exss 1(ol ).jvwmtypeed if its velocity is constant.

  The velocity of an object can be negative when its acceleration is opuj* g z28,wbpositive.

  If one object has a greater speed than a second object, the first must have a grgx 7kkjl- 25pokv5k z2vlzr -.eater acceleration.x5-zk2 ol.vvpkrk57k-2z jg l

  Two cars emerge side by side from a tunnel. Ca rvr:1wi .)ldwzrf(s/m y- 6kar 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 decreasigq..e6 e5 2frb9o,h ui ehme.es.

  A baseball player hits a foul ball straight up into the air. It leaves te tvg46k d:)zzhe bat with a s6gt: zd)z v4ekpeed 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 its acceleration, 0ut2ki7t+z) rqpx3tu how does it change if air friction tuk i 2t )rqt307zpxu+is ignored?

  As a freely falling od)cg6 o+iv: 4ggfa -ucbject speeds up, what is happening to its acceleration, how does it change if air friction CAN NOT be ignore )gc+ :gfu46adc -oigvd?

  An object that is thrown vertically upward will return to its originakg4y8v (ikw/xl position with the same speedk i /(8gw4vyxk as it had initially if air resistance is negligible. If air resistance is appreciable, how will this result be altered?

  An object can have zero velocity and nonz7fp0j anlh5; tn6 a)x3x txvc9ero acceleration at the same time.

  An object can have nonzero .m8: u *vxc/jwyxq1djvelocity and zero acceleration at the same time.

  An elevator moving from the second floor to the fifa;8 5w xczoklb+ 8xo8lth floor making no stops along the way has zlk8zlcw58+ bxoo;a8 xero acceleration all the time.

  A rolling ball moves from 7im wb g*9irpl c:m jb(+vke24$x_1=3.4 \mathrm{~cm}$ to $x_2=-4.8 \mathrm{~cm}$ during the time from $t_1=3.0 \mathrm{~s}$ to $t_2=5.4 \mathrm{~s}$. What is its average velocity?  (数值)  $cm/s$ (only fill in numerical value please)

  A particle at $t_1=-4.3 \mathrm{~s}$ is at $x_1=2.4 \mathrm{~cm}$ and at $t_2=3.0 \mathrm{~s}$ is at $x_2=8.5 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight com 62 ai2p0blmgkq mgn(goy89o1plete laps around a quarter-mile ($1 \; mile = 1609 \; m$) track in a total time of 7.7 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 m4l ;w2imhdi15 n,lrdu away in 8.6 s. It then turns abruptlmwl,h2ru5i4l d1d; in y and gallops 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 from f1zt1p9dbw y,fp. w,h $13 \; m/s$ to $25 \; m/s$ in 4.3 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 x, g 4t lst*w3, kfjpsg:)tm5f$17 \; m/s$ to rest in a distance of 85 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reacv/noaifdy1 t)70 esb4h a speed of $27 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $2.3 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinter can burs6dma(gv- s (2qbwyv-n)h1p qdt out of the blocks to essentially top speed aboutd1)qnygs(h-2a vd( mvb -q6 pw $10.5 \; m/s$ 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 frqfip vc.)2 kwasn1qt1m:w0t6x s , aq8om a speed of $16 \; m/s$ to rest in 5.17 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 highwaaz*xpgrgi r;e g 43e16y. Assuming re*gex grzg41; 3a pi6a deceleration of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck going gr lji2p vx06/e* h3qj$25 \; m/s$ 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).    $m$