Suppose that an object tt ttz8wj4k9nm g47g (n*xi)y, ac p-xtravels from one point in space to another. Make a comparison between the displacement and the distance t 4cp) , yt4ktm-j 8gttnxzwx97i*a(ngraveled.

  When is the average vu 89 xix;,vjmxelocity of an object equal to the instantaneous velocity?

  A new car manufacturer advertises that their car can go 1p2t(wbryy;yj 3+ gpnb2+ hby"from zero to sixty in 8 s"y ;tr(j p21p+yg2 wbn+y3b hby. This is a description of

  An object moving in the +xvow j n2h+ o3*q6slgre76kz0rmc p;* h axis experiences an acceleration of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to the East (+x direction) beg ue)o/a5 kdw6g* hgy w;z*iqdga863yeins to slow down as it approaches a traffic light. Make a statement concerning its acceleratioe y6 oqda )wg*z5;/*ey6iagu3gwk 8dhn.

  Suppose that a car traveling to the West (-x direcys6g0kydd k,resp5, 5tion) begins to slow down as it approaches a traffic light. Make a statement concernid,ys5k5 kgesyr 6d0,png its acceleration.

  Suppose that an object is moving with a constant velocity. :uf+ irms8, 10wh puck Make a statement concerning its acceleration.+,pus1uk:fcm0 wrh8i

  If the velocity of an object is zero, does it mean t.py 1o*hlti+ zhat the acceleration is zero? Support you1+p*o hyz .tlir answer with an example.

  Can an object's velocityi ut1t86.1v pn( rqvey change direction when its acceleration is constant? Support your answer with an example.n8p(qvv t1y1e i6ru t.

  Suppose that an object is moving with constant acceleration. Make a (jj0(83z 8wqifi katpq m f,:wstatement katf:iw qjiw8jfq80 p((3 m, zconcerning its motion with respect to time.

  Can an object have increasing speed while its acc)h4za/2ecs* svhu 9qr eleration is decreasing? Support your answer w h /qh4aves*)s2z9u rcith an example.

  Suppose a can, after an initial kick, moves up along a smooth hill of ice9f,z:4una jrjosgkbw di8; 59. Make a g5iajo n,s zjbr9:84;9d fukw statement concerning its acceleration.

  Under what condition is average velocity equal to the average of )ek cq x810jjfjxh0z7the object's initial and fix8 j7k zj0 )ex1jfcqh0nal velocity?

  Objects A and B both s-sycsqt5m5v1rd0ulik fx .+- tart at rest. They both accelerate at the same rate. However, object A accelerates for twice the time as object B. What issq0u- 5rmxvyf5st1c i.- d +lk 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 sa5g3( r h ero wf9u-,rw9,fum)hd u3otame rate. However, object A accelerates for twice the time as object B. What is the distanrd5amo ,ut hg(h)3owrwe 9- 9 fr3uu,fce traveled by object A compared to that of object B?

  When an object is releasedbg*6 *ydx gd,p from rest and falls in the absence of friction, which of the following is true x,pdgdg y*b6* concerning its motion?

  When an object is released fromhd,w/*,wu 9khgd uwbl7p i/ 5h rest and falls in the absence of friction, which of the following isdd*h iwg7/lwu, ,/ 95pwkuhhb true concerning its motion?

  Suppose a ball is thrown straight up. Make a stly.kzl 8 fj ,t*qmp6i9atement about the velocity and the acceleration when the6im8ljzl 9kft .qyp,* ball reaches the highest point.

  Suppose a ball is thrown stra1m d;6oo/b pfhmff+d4 ight up. What is its acceleration just before it reaches it;mho1pd+f /m4 6fofbds highest point?

  Suppose a ball is thrown straight up, reaches a maximum height, t 2zva w,iut;xwr/ue-vo66 i:jhen falls to its initial height. Make a statement about the direcvj6u wu t;x:i/e,zrow a2-i6vtion of the velocity and acceleration as the ball is going up.

  A ball is thrown straight up, reaches a maximkr 5 th8cdrcz o +g5t*73um*z7ut0z ayum height, then falls to its initial height. Make a statement about the direction of the velocity and acceleration as the5 c3t7*mr5o8rc+ 0zatgy 7 t*uduzhkz ball is coming down.

  Suppose a ball is thrown downward in the absence of air res;(mdhruxi d:z3 jy 2-distance. Make a statement concerning its acceleruyz3dix ;d hd:2-jm(ration.

  Suppose a skydiver jumps from a high-flying plane. What is her acceleration whea j+3zlb-1/epq aukkk05:rwp rs j ;x0n she sh 3 plkzj-: r 0aw;bkq1arspkx/u5 +je0e reaches terminal velocity?

  A ball is thrown vertically upward with a speed v. ct/e8st -jut: An identical second ball is thrown upward with a speed/jstu te: 8ct- 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 does the second ball go than the first ball?)

  Ball A is dropped from the top of a building. One second -3v4qk,z - yhv kuufgu75( tnj1th dl1later, ball B is dropped from the same building. As time progresses, the distance between t,jh3ft1l t4-g- u(zndv51u v khy7uqkhem

  Ball A is dropped from the top of a b(0.be: ( kb )ewlnn+wxxfhox 5uilding. One second later, ball B is dropped from the same building. As time progresses, the differencel( bohb+k5 ef x: w(ennxxw).0 in their speeds

  Two objects are thrown fromrpfo +i-. w 2huo9tkzu2u(9fc the top of a tall building. One is thrown up, and the ot9cru+o wph(-9o2 .fkuuzf2 ither is thrown 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 building. A ssm( *q fw bhrth8*4cr.econd brick is thrown straight down from the same building. They are released at thr t .*fbqhw*h4 (mc8sre same time. Neglect air resistance. Compare the accelerations of the two bricks.

  An object is moving with constant non-zero velocity in the +x axi *(9gqs8r xpuos. The position up8 q9*grxos(versus time graph of this object is

  An object is moving with constant non-zerxz, p9 6kle ryc9+qzz)o acceleration in the +x axis. The posit pekqz9yx6+ z9rcz), lion versus time graph of this object is

  An object is moving with constant non-zero velocity in the ms5pjy7u 3hmsi2m*+ c +x axis. The velocity versus time graph of this object icysh *m7+3u2spj mm 5is

  An object is moving wizv iqw;m) 2nh+th constant non-zero acceleration in the +x axis. The velocity vers+ w;)ihzm2nq vus time graph of this object is

  The slope of a positionrcz-jm8m-so,/qpr u x2v*c f: versus time graph gives

  The slope of a velocity ver nges;cd64zty )yq() rsus time graph gives

  The area under a curve in an acceleration versus time graph givews.w8mngf t ++s

  The area under a curve in a velocity versus time gv1:1 wlqggml/:4hq6re yjnn0 raph gives

  If the position versus time graph of an object is a horizontal line, the objectu q5:marim0la/ -03/dadbq du dq d5m-lubqa:iam0/rda/3 u0 is

  If the position versus time gra1, uni3s;i;6i qezln qph of an object is a vertical line, the object iss 1,e n ;qlqiz;36nuii

  If the velocity versus time graph of an object 7b2fs6f,2;u 81i sx dlh81mduapqn ybis a horizontal line, the object 8yqfx,f1b auhp;us27sd82nl i 6bd m 1is

  If the velocity versus time graph of an object is 3u 1*vs bxqz;(o,dhek a straight line making an angle of 30 degrees with the time axis, the o(e; uxq*k, 3z1sdbh vobject is

  An object moves 15.0 m north and then 9)ks9o8ixqp jj fe6i :jn 21so11.0 m south. Find both the distance traveled and the magnitude of the displacemensn1fko s:6pqx8i9ji 9jeo j)2t vector.

  A boat can move at 30 km/h in still water. How long will it take to mo 5jgz-9b3 rqdjve 12 km upstream in a riv- g3br9d 5zjjqer flowing 6.0 km/h?

  55 mi/h is how many m/s? (1 mi = 1609 *b)-))xz:v0lod5o*;lsi z+3omuwosqcyq a u m)

  What must be your average speed in order to travel 35tne7uzc+yttb ,. g7y *0 km in 5.15 h?

  A runner ran the marathon (approximately 42.0 km) in 2 hours 8 rq8km.df 5zmvk4 um ,is664ivh0cqgand 57 min. What is the kmkv,cdmsz .g8f4ir64qm v i680hu5q average speed of the runner in m/s?

  A car travels 90 km/h. How long doqrb9 gnb9 z2alp6d f8 l(q-6yges it take for it to travel 400 km?

  A ly (light year) is the distance ty4.pkst/yu88ui5(q 2 hh zqkfhat light travels in one year. The speed of liuk2. hq 8kzf y5psy4ih8utq(/ght 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 aloe2 bpg82uex ,g2vb8,*xadrd rl+ (o pung a straight road and you look to the side for 4.0 s, how far do you travel during this inattentive p ,brr+ue2vlbaxd (g2*u 2 o88,gepxdperiod?

  If you run a complete loop around an outdoor track (400 m), in 100 s, your averauwl+i))a39e ndd ny 9age veuw+ia)9)n9dd3yen la locity is

  A polar bear starts at the North Pole. It travels 1.0 km south, then 1.0 km eajb4cf :n-s(i ast, 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 s-a4 :ns(cibfj peed?

  A polar bear starts at the North Pole.y8wu wx2* ovl+ nk1kh- t32qyq 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 starting point. This trip takes 45 min. Wha 2uxyyv8 tq-wl1o*q3h k 2nkw+t was the bear's average velocity?

  You are driving home on a weekend from schoojfz/.6v+tja a l at 55 mi/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 minutes. v+ta f/j6j.a zHow far is your hometown from school?

  A motorist travels 160 km (iv xlzc 573that 80 km/h and 160 km at 100 km/h. What is the average speed of the mototxc z7v5h3i l(rist for this trip?

  A motorist travels for 3.0 h at 80 km/h and 2.0 h at 100 km/h. oxo cp9mf1vz 2.du2wy :j 8y+kWhat is her average speedf+y 8x.j2 kd zuomwv92 c:po1y for the trip?

  An airplane travels at 300 mi/h south forg uq21 bn/tl0aeqq 0-ew9)bew 2.00 h and then at 250 mi/h north for 750 miles. What is the averb0e2wt0leun /wbaq qe 9)g1-qage speed for the trip?

  In a 400-m relay race the anchorman (the pe5no ,zwzi2fo9zp u9b +rson who runs the last 100 m) for tea,po9uz n+9ofwzi bz52m 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 lose the race?

  A car decelerates uniformly and comes to a stop after 10 s. The car's averagetfyo b /oa3rum yf )*c(:(2uyi velocity during dec: yyt3a (u iu rmy)o(fcf/2b*oeleration was 80 km/h. What was the car's deceleration while slowing down?

  An airplane increases its speed from 100 m/s to 160 m/sgwnxprb7*2 1 6.8cxf x p+lzro, at the average rate of 6 xo z*+c1.8x lb7rp2wf pgrxn$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h arbzc 0 ocln/,5 wz*0rpky10olccelerates 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 re62 coky4y fa* 0hpvm4xst and 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 mc;g1 ;walm69pdna z/aj8l n7j/s for 10 s. It then speeds up with a constant acceleration o8a 6/aa7gdn;wjmlzl19jcpn ; f $2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial velocity of 6.7 m/s experiences a pupacgbwf x1;.ny;+*x -g7e4t-nkc wconstant acceleration obcatfp ;knwwn;e-x1-gx py*+4 cu.g7f $2.8 \; m/s^2$. What is the cart's displacement during the first 5.0 s of its motion?

  A bullet moving horizontally to the right (+x direction) with a speed ofr18cw (fg y*l+s0e mnj 233 m/s strikes a sandbag and penetrates a distance of 48.24 cm. What is tcrljw ( g0fmy8* +en1she average acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is launched from a catapult on an airot(qm 9bt2htx; q5jup g9k4 *q)-okurcraft carrier. It reaches a speed of 42 m/s at the end of the catapult, and this requires 2.0 s. Assumingqkub r t99kpo(4t ;uqtj2-o q *mgxh5) the acceleration is constant, what is the length of the catapult?

  A car starting from rest moves with constant adzkv/1) 3bg xacceleration 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 200q+pr9bx j/:axs, : -yrkx+i py m. What is its average acceleratr-,yx+xp9:r s+:a/ ybpxjkiq ion?

  An object starts from rest and undergoes : e2c6ie wzs)zuniform acceleration. During the first second it travels 1.8 m. How far will it6e)zz :ci sew2 travel during the third second?

  An object is moving in a straight line witx9lhpvvkh3,x : eqi4) h constant acceleration. Initially it is traveling at 16 m/s. Three seconds later it is traveling at 10 m/s. How far does it move during thike h xq vvixp9l:34),hs time?

  A car starts from rest and acceleratq pc:h1jx;dc 04xic )oes 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 cazlv.,7v bjc7 8+v9pepnkbpo: 3yo(la n 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 bee0f,vor ls3kwh7b x*)v n waiting at the intersection startsh vvsbklf *r 0x)3o7,w 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 suryo s))1v( ;sfxfw/lxk: a vi,cface of planet X where the acceler, xsl1v( i)wa)sf x/ykvf:oc;ation due to gravity is $1.5 \; m/s^2$. What is the maximum height reached by the object?

  An object is thrown sttup rnj:pq-: 0;q )mupward with a speed of 12 m/s on the surface of planet X where the acceleration due tr)mt :qp ;n0 us:jtpq-o 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 with62u vsfg+a .ea a speed of 15 m/s on the surface of planet X where the acceleration due to gravity ie2g6vfa ua+s. s $2.5 \; m/s^2$. 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/sdbuus 9j4s:(fr c-(mr on the surface of planet X where the acceleration due to gravity id-s:rsru4jbm9f( c (u s $3.5 \; m/s^2$. What is the speed of the object after 8.0 s?

  Human reaction time is usually greater than 0.10 s. If your friend holds a repc) h, w fvc4pi3x8g2uler between your fingweg3fpvpc2i8h4c, x ) ers and releases it without warning, how far can you expect the ruler to fall before you catch it?

  A ball is thrown upward ar49 j)o hdi /fgbw+ w c;of4k0aqk+v2ct a velocity of 19.6 m/s. What is its velocity after 34 ccok2 of;dg+hi4 fbjr0kw+9qwa )v/.00 s?

  A bullet shot straight up returns to iy 3./.am a7ftorkb3xh ts starting point in 20 s. What is the initial sp3mxh 7.ao3ft br yka./eed of the bullet?

  A ball is thrown straight up with a speed of 36.0 m/s. Ha,1mejfc. 1gm:kjv-l 3 we(pj ow long does it take to return to its stav-epc e m1j(1 ,3 k:.wmjgflajrting point?

  A ball is thrown downward from the top of a building with an initiz.jg1* z ci 0fqhdw5si*6mt u.al speed of 6 m/s. It strikes m1 .ih.q*gdizjw u*s0t6 fz5c the ground after 6.3 s. How high is the building?

  A ball is thrown straight up with a speed of 30zmncn +a-qq :vp 32c*r m/s. (only fill in numerical value inqcv-nz3:cpa +2n mq r* 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 straiqx ki qy+p5pvq;6-eh(ght up into the air with a speed of 47.2 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 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. m papn(e,b5-m0 s?

  In Fig. below, what is the velocity at t = 2.e+xltx0+ccfi9 l g-+z5 s?

  In Fig. below, what is the velocity at t = 4.r jtr/q p0 oy**k(1vap0 s?

  In Fig. below, what is thefnc)vn y8 8h*ra4uw5/zx 5ruf velocity at t = 5.5 s?

  In Fig. below, what is the averm 9r c2j+zic)hage velocity from 0 to 4.0 s?

  In Fig. below, what is the average velocity from 0 t,b 3s*(c *rdj6rbyavxuz +-zm o 6.0 s?

  In Fig. below, what is the acceleration at -1catkvr/ r;kk(u l0h1.0 s?

  In Fig. below, what is the accef angeg .w0,ew87 cgurmzx l7hw,+- z:leration at 3.0 s?

  In Fig. below, what is the average acceleration f4 c6 e,5zoie5o6kakd zrom 0 to 5.0 s?

  In Fig. below, what is the average accelerawyf12msq,f dq+ vy8kza69:phtion from 0 to 8.0 s?

  In Fig. below, what is the displacement fro klj-kczlr i, b(p9m45m 0 to 8.0 s?

Does a car speedometer measure speed, velocity? {speed|velocfwfjo/-z*j5; gqcs -j.s9fq eity}

  An object can have aur m5zs o*c4s4 tj69gf varying speed if its velocity is constant.

  The velocity of an object can be negative when its acceleration is positive0p 7u lqr/eo:x.

  If one object has a gr.mxde f whvh,- 3)st.5xzjs-o x/gqs -eater speed than a second object, the first must have a greater accelerations -sx gs /.x5-)dmoxt- jeh hq.v3zwf,.

  Two cars emerge side by side from a tunnel. Cqc 4q maq) c;(9t3titxar 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 decm-g q9bt7)) zbr3e iqareases.

  A baseball player hits a foul ball st3mx.em5arf slh5e9 : rraight up into the air. It leaves the bat with a speedfr3al e e m.s59rh:5xm 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 happexyw4hzi2d( qjy,x- 4j8 st)runing to its acceleration, how does it change if air friction is ignored?4uhxt-drzi4y2)s8j q xy j(w ,

  As a freely falling object speeds up, whatdj q87fd ,fc:4+mwaao is happening to its acceleration, how does it change if air frict+fw:am q f,7dd o8ajc4ion CAN NOT be ignored?

  An object that is thrown vertically upwlr jsk(7 lbp d:-wsk61ard will return to its original position with the same speed as it had initially if air resistance is negligible. If air resistance is appreciable, how will this result blsp(kb:s 1j6lk w-dr 7e altered?

  An object can have zero rw9 pz7yv9w1 rvelocity and nonzero acceleration at the same time.

  An object can have nonzero velocity and zero,,opdk : jzdp* acceleration at the same time.

  An elevator moving from the second floor to the n1-bg) rqt/hbm0j ib;fifth floor making no stops along the way has zero acceleratior-mhib /;t n)qj10b gbn all the time.

  A rolling ball moves from 2y3hm8xgu l 5d$x_1=2.4 \mathrm{~cm}$ to $x_2=-6.6 \mathrm{~cm}$ during the time from $t_1=2.9 \mathrm{~s}$ to $t_2=5.6 \mathrm{~s}$. What is its average velocity?  (数值)  $cm/s$ (only fill in numerical value please)

  A particle at $t_1=-4.6 \mathrm{~s}$ is at $x_1=2.5 \mathrm{~cm}$ and at $t_2=4.0 \mathrm{~s}$ is at $x_2=8.4 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete laps around a q)ov*; ep r(mkkuarter-mile ($1 \; mile = 1609 \; m$) track in a total time of 6.1 min. Calculate (a) the average speed  (数值)  $m/s$ and (b) the average velocity    $m/s$

  A horse canters away from its trainer1(wuzaf ajy5w0;up*hdp l 6b; in a straight line, moving 100 m away in 8.8 s. It then turns abruptly and gallops halfway back in 4zhpa ;0(b;5uup j16ww lda*yf.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 fruh xz.upkdc28-l1clj k7vm; 4de4v7a0 )us e com $12 \; m/s$ to $23 \; m/s$ in 5.4 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 fro mya* v*bc/-b d4d,ckqm $21 \; m/s$ to rest in a distance of 74 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reap9y)nfkp 4;rlw-+4iv n sij,wch a speed of $27 \; m/s$ 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 clf +hcoicf 9b9 yd9xna 905tr7an burst out of the blocks to essentially top speed aboulx99yh rba7+59 cfficdt0no9t $10.5 \; m/s$ in the first 13.5 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 uniform a6l gi eo97g8-xy*ah0 wk(xpfly from a speed of $16 \; m/s$ to rest in 5.75 s. How far did it travel in that time?  (数值)  $m$

  In coming to a stop, a car leaves skid marks 92 m loc9 ji00z kn .3etba-ueng on the highway. Assuming a decelerati.09zjnia c0uke- be3t on of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck goingh+juk :8oy.-z;ksm avx k/4pw $25 \; m/s$ 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 than5lrqo -vxs1p7t;s 8hs 30.0 min. After exactly 27.0 min, there are still 1100 m to go. The runner must then accelerp; 5stov78-rl1hssq x ate at $0.20 \; m/s^2$ for how many seconds in order to achieve the desired time?    $s$