Suppose that an object travels from one point in spn ,5w c7sx)vc t*8xolpace to another. Make a comparison between the displacement xnts8p w c75*l)xc v,oand the distance traveled.

  When is the average velocity of an object equal to the inst5 j)sixs2 *gwaantaneous velocity?

  A new car manufacturer advertises that their car can go "from qtxry-sh +w78 zero to sixty in 8 s". This is a yr t78+hw -sxqdescription of

  An object moving in the pgv-:e7e t:ro+x axis experiences an acceleration of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to tha2 1wy1 )jwo gses3h/og5g,xse East (+x direction) begins to slow down as it approaches a 1wg23)gyxjwoesgs5 o /a, 1hstraffic light. Make a statement concerning its acceleration.

  Suppose that a car traveling to the West (-x direction) begins to slow don7t6 xsff n2at h(7e5kwn as it approaches a traffic light.72k7xse(tffhn5t na 6 Make a statement concerning its acceleration.

  Suppose that an object is moving with a constant velocity. M)y. hb cvovo)r0i*,lj ake a statement concr0i b, vovjy)h.lo)*cerning its acceleration.

  If the velocity of an objln1kg)+ q*ivvect is zero, does it mean that the acceleration is zero? Supporkgn +*1v)iqlv t your answer with an example.

  Can an object's velocity change direction when its acceleration is const jf13p01guhg ,v afb+ag8q +nmant? Support your answgfvafnp a +1u0g8bjh+ ,qm3g1 er with an example.

  Suppose that an object is moving with constant accelerat xd1vto0 qinq/+iki .mti;9v:ion. Make a statement concerning its1 n iidq .kv/xo0qt+m9tivi ;: motion with respect to time.

  Can an object have increasing speed while its acceleratiojeq(bp1p: d2xz-1xmyn is decreasing? Supportp1bjp-q:yezmdx2 (1x your answer with an example.

  Suppose a can, after an initial kick, moves up along a s0bdnr-yenk1 ze,m (s)x 3k:ekmooth hill of ice. Makenz3 dbekeye1 rkxm-s,)( k0n: a statement concerning its acceleration.

  Under what condition is average velocity equal to the averaev 5r.phrb eb6h5w81age of the object's initial and final vbew5ve6b h.h1r58r pa elocity?

  Objects A and B both start at rest. They both accelerate at the same9ufi ie08dw6 p.sze:/hw s4lw rate. However, object A accelerates for twice the time as obji 9.wes0wisup 4w e6zd8hf/:lect B. What is the final speed of object A compared to that of object B?

  Objects A and B both start ,jtb(qa l6 4x/d3etenfrom rest. They both accelerate at the same rate. However, object A accelerates for twice the time as object B. What is the distance traveled by objec4( jd qe63,ltnxabe t/t A compared to that of object B?

  When an object is released from rest 39q+h1 z8o* i)jhkuymk xh0jland falls in the absence of friction, which of the following is true *khoj xulqm)9+ h 80ijzy1hk3concerning its motion?

  When an object is relequfk tk-k1*l i ,(4ddyased from rest and falls in the absence of friction, which o*, ldqi(uky tk dkf41-f the following is true concerning its motion?

  Suppose a ball is throsvqurv8+u.6fv sprmh/ 1dbc*/ 1s;yown straight up. Make a statement about the velocity and the acceleration when the ball reaches the 61fv b+s*/h vr orcyds;psuv .m1q/u8highest point.

  Suppose a ball is thrown straight up. What is its acceleration just before it vxw k6lh g1):,ku2ofvh- k9 ggreaches its higheslh1khgxk vv)-o,gkg w:9uf2 6t point?

  Suppose a ball is thrown straight up, reaches a maximum heighvv7*j s b f(+fypoj))nt, then falls to its initial height. Make a st)(jv off+)pbj n* vys7atement about the direction of the velocity and acceleration as the ball is going up.

  A ball is thrown straight up, reaches a maximum height, then falls to ivun(hn)k)mp6q)1k1 yu1oaa fts initial height. Make a statement about the directuu p) akk)y6 vam f)11(1qohnnion of the velocity and acceleration as the ball is coming down.

  Suppose a ball is thrown downward in the absence of air resistance. Make a s*2tp +3hw5n4uh -qjlyoqhf)f tatement concerning itwh)jly+ -thf54p*hf2 qu3o nq s acceleration.

  Suppose a skydiver jumps from a high-flying plane. i 8rz, 1 (jj1d*rnnqpf-*ddh;lbc33ghrd cp7 What is her acceleration when she she reaches termi rd 7,jpb31dn-hgicnr ldh*pz 1qr (*c;fjd83nal velocity?

  A ball is thrown vertically upward wzv /vxl-4* wfkith a speed v. An identical second ball is thrown upward with a speed 2v (twice as fast). What is the lwz4xk-*v v f/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 buildinxtffm:7+(n*yjyli.d paxc09k0 f s r5 g. One second later, ball B is dropped from the same building. Asl+n5m jr typ.9f0fcdyka xsi:xf7 *( 0 time progresses, the distance between them

  Ball A is dropped from the top of a building. Onskh 8p9;olfj0e second later, ball B is dropped from the hp j0ok8f;ls 9same building. As time progresses, the difference in their speeds

  Two objects are thrown from the top f:rb; r10ne8qobx65iqmb5ia of a tall building. One is thrown up, and the other is thrown down, both with the same initial speed. What are their spee q:e581ba6i nm; qrbbriof5x0ds when they hit the street?

  A brick is dropped from the top of a building. A second brick is thrown straiglyu.d 2k:z4 2ans qq:jht down from the sq a:.ujzs24n2dy lqk: ame building. They are released at the same time. Neglect air resistance. Compare the accelerations of the two bricks.

  An object is moving with constanluxl8om* d kj.j0fu (1t non-zero velocity in the +x axis. The position versus time graph of this ob.ujo um l8(dlf1*kj0xject is

  An object is moving with constant non-zero acceleration in fhi 1oqey sn l.o(9609 4fxkefoq)c f0the +x axis. The posifo4f09e qcy6k1fo fsx) (ieoq9h .0ln tion versus time graph of this object is

  An object is moving with x* pswv8qxp yq1i*;0dconstant non-zero velocity in the +x axis. The velocity versus 1sp0 vyi*p*wx8 xd q;qtime graph of this object is

  An object is moving wxyt84olq9+i2y j;+vq gqo7q uith constant non-zero acceleration in the +x axis. The velocity versus time graph of this4qq++x; 7 y9ju2qoovtq y8ilg object is

  The slope of a position vew slh l8/m*.wnrsus time graph gives

  The slope of a velocity versus time graph giyvqzdzpkv q64s r cs1yt*3.p)2*e)v eves

  The area under a curve in an a* ap* 24iybdr-/dsjw4 f,nvgecceleration versus time graph gives

  The area under a curve i -im.2hyyod z/n a velocity versus time graph gives

  If the position versus time graph u 8ef+8bl5gpw9 zic cbp5 8h.mof an object is a horizontal line, the object iu z5mlce. h8gi+bf5wb p98p8cs

  If the position versun;6n( b u8nv ky2+u57 af6wnei5yihu js time graph of an object is a vertical line, the object isyi 7e8 ;nub6yn nfjki+(wnhv 25uu a65

  If the velocity versus time graph of an object is hsr 8h/n5( czpa horizontal line, the object ish rnzch 5/(s8p

  If the velocity versus time graph o-.; 1:gid*-h,gmtwl xndud,v obuk.nf an object is a straight line making an angle of 30 degrees with the time axis, the objegg dox *wt .1 :n,um-ilhk-nvd.du,b;ct is

  An object moves 15.0 m north and then 11.0 m south. Find both t jp+fl y,6.ryphe distance traveled and thefj 6p+ly,rp.y magnitude of the displacement vector.

  A boat can move at 30 km/h in still water. How long will it take toqe cffgn y5hp:8vm7:yb ad ;)j6vwo67 move 12 km uq oh7bg7y:6fj dy)cp vv awf;n65e:m8pstream in a river flowing 6.0 km/h?

  55 mi/h is how many m/s? (1o .a9 :nu,q2pcvp*a +a1vvzjp mi = 1609 m)

  What must be your average speed in order to travel 350 km o))pnh7 xd5bj5 m)fyc in 5.15 h?

  A runner ran the marathon (approximately3ba6-l )3 e-oj/zogfdmhhu s4 42.0 km) in 2 hours and 57 min. What is the average speed of the runner in m /fo)-hjb ad4 z6gsmul3h o-e3/s?

  A car travels 90 km/h. How long does itl :x7g)g37svl62dhm * lth zlb take for it to travel 400 km?

  A ly (light year) is the distance that light travels in one year. The speed ofsqaaza uw/*2) bp/ ,hn light iup azwh,a)q/2a *b n/ss $3.00 \times 10^8 \; m/s$. 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 thv 4p4 e qu.fsqci.z(c5e side for 4.0 s, how far do p4 .q.euv ic (sz45cqfyou travel during this inattentive period?

  If you run a complete loop around an outdoor track (400 m), in 100 s, yo*4qxq vs9g pol1ymk-,m q-x9jgyp ,t 9ur average vely*9 ,4,yo9qqptvmxk s x- 9j-q1ggpmlocity is

  A polar bear starts at the North Pole. It travels 1.0 km south, then w-ov,*p3i)+ dnm * pc prz rvng*0fxc51.0 km east, then 1.0 km north, thg p3or wn**npmp+*rdx 0f,ccv-vz5 i)en 1.0 km west to return to its starting 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 1.1 f/o32yizq:e9 /nrzo h swel40 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 averag3oq/w1f24n: ez/9l ih ero szye velocity?

  You are driving home on a we*,:irvojiu8t1iush: o pwb8 +pzf5k+ekend from school at 55 mi/h for 110 miles. It then starts to snow and you slow to 35 mi/h. Yoppf+, z+:1oohrut5usj :i 8 w i8vb*iku arrive home after driving 4 hours and 15 minutes. How far is your hometown from school?

  A motorist travels 160 km at: htg sbqv*p /t8hnz0 sb,0j;(otu lboh47;pi 80 km/h and 160 km at 100 km/h. What is the average speed of the motorist for this lt*ht/z;b (p,sop jhv4hoib70:n u8t0;qbsgtrip?

  A motorist travels for 3.0 h at 80 km/h and 2.0 h at 100 km/h. What is her avessf njv9 7uo :n4a/(eurage speed for v7s4joe9ns: uf a (n/uthe trip?

  An airplane travels at 300 mi/h sout;0qa. js xv3qkh for 2.00 h and then at 250 mi/h north for 750 miles. What is t jqv3x.q;ks 0ahe average speed for the trip?

  In a 400-m relay race xmf tr) 6q/cdn2zv9+ xthe anchorman (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 cnvx c+df2)69trm z q/xover 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/s:0gp b68 jyhtaj qbae;s*r- 8 s. The car's average ve-yapgt8rbb*s/ :jheaj 6 ;q0 slocity during deceleration was 60 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 rate okabplu1ve0) t1q 7 t3jzroh2 1f oljv3h0tur1tk e) za21b 17pq$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h accelerates at the cj. mdc.3c;za6jf 2kxrate 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 accel +7,9/ f9muizr gzctiterates 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 s3bhe*1zf k22u d dh3zxh1hf r,. It then speeds up with a constant acceleratio*3fhhd2 3he 1,1 bf2zdru hkzxn 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 2.2 m/s experiences a constant accelerationyru, yn;; mf.n onfy .m,;uynr;f $2.2 \; m/s^2$. What is the cart's displacement during the first 7.9 s of its motion?

  A bullet moving horizontally to the right (+x direction)f)dwjk 1 b qtb6v,vc4/-8 uyqc with a speed of 375 m/s strikesfbq-vjdcc 4)b /q8k6u v ,wty1 a sandbag and penetrates a distance of 74.80 cm. What is the average acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is launched from a catapult on an aircraft carrier. It dke 6nx )qa 2nee8hmq j0hy43b4sh3 .breaches a speed of 42 m/s at the end of the catapult, and this requires 2.0 s. Assuming the a bs 8e3 .43qhmex)2jqnbh yn40e kahd6cceleration is constant, what is the length of the catapult?

  A car starting from rest moves with constant acceleratili1nwf/ fl7 u;/2 yyxgon 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 dis. b.jdg-m1b xptance of 200 m. What is its average acb.x m b.jg1d-pceleration?

  An object starts from rest and undergoes unifoqi+m8pit3 /zjrm acceleration. During the first second it travels 7.0 m. How far will it jm/it83zqp+i travel during the third second?

  An object is moving in a straight line with constant acceleration. kdu m4vwxmy7q(apq1vk3 /nu+u p5c7;Initially it is traveling at 16 m/s. Three seconds later it is traveling at 1pq5 ( pkw3ka7vmc4x7;u/quny+ 1 d umv0 m/s. How far does it move during this time?

  A car starts from rest and accelerates unil. j/1 d(zfzyeformly 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 cjv2q 9 du;j)r87l vvl4qh5e rlan 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 th+4hg-klgi fwq tj. ky+-ka nh2z*-7yjat has been waiting at the intersection starts ahead wiw. 7 k-n j4hylkg kh+ -zf*aq+j-t2ygith 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 withmomy : ;wfxgcz5wchs5*-w3 ;a a speed of 12 m/s on the surface of planet X where the acceleration due to cma-szw*5c; 3o h f;gy:x 5mwwgravity 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 planc gy; jrwdk4:iio3f/;et X where g:oyi /c w;3; dr4jikfthe 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 1a3jazit4 (ds4 quxb t-95y( bu5 m/s on the surface of planet X where the acceleration due to graviu-b( yz45 4ajaq sid3tut9xb(ty 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 ) i9f5btc7 maavwc +hs+r 2x2gn5r6hq/s on the surface of planet X where the acceleration due to gravity rfi52hbvw2tcas ch 7 5mg+6x9r q+na)is $3.5 \; m/s^2$. What is the speed of the object after 8.0 s?

  Human reaction time is usually b+d -z2k /oigxgreater than 0.10 s. If your friend holds a ruler between your fingers and releases it -g doz /2bxki+without warning, how far can you expect the ruler to fall before you catch it?

  A ball is thrown upward at a velocitygs i;+f 6c+laa of 19.6 m/s. What is its velocity after 3.00 s;6gfs +ca+ai l?

  A bullet shot straight up returns to its star5y t/ggvr o1q.3x/mtdting point in 10 s. What is the initial speed of the bug/o.q/ttymx31r 5v d gllet?

  A ball is thrown straight up n -f37onmkwj)with a speed of 36.0 m/s. How long does it take to re mnwnj-7 of3k)turn to its starting point?

  A ball is thrown downward from the top of a building with an initial s;sn 7vzb.m 1sopeed of 18 m/s. It strikes the ground after 6.9 s. bo. sv1szmn7;How high is the building?

  A ball is thrown straight up with a speed of 30 m/s. (only filcsea1b ,spwkee 4)- 0kl in numerical value in ,s 0kb)eeepw41s-akcthe 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 with a speed of 21.4 m/s. / u 7d)ov 1:uigiua*ij(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 7 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 7.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what is the t 6,b)e2j2b ;ujfcftcvelocity at t = 1.0 s?

  In Fig. below, what is x477+k1bjojp( rqwcf the velocity at t = 2.5 s?

  In Fig. below, what is the velocip u.ib9lue*r7g/ z8jd -v3i7l dis eu9ty at t = 4.0 s?

  In Fig. below, what is the veloc/0wi4,5prw5zgct8 j 2 tbfhcwity at t = 5.5 s?

  In Fig. below, what is the average velocity from 0 t41 vqlui5x13jk1pgh:w ygon5 o 4.0 s?

  In Fig. below, what is the average vey,kx +qre 2g0a0dw; a 2 cgyxnnoi53rue2*k.olocity from 0 to 6.0 s?

  In Fig. below, what is the acceleratio)*) ftg7oocbc /0t-irg* e0medyla a)6 r2ketn at 1.0 s?

  In Fig. below, what is the acceleration at 3.0 e ) oeqcx q;gzu7x105us?

  In Fig. below, what is the average acce4 syv9 fb0w6hoah/mk+leration from 0 to 5.0 s?

  In Fig. below, what is the average acceleration from 0 tot/m.m xia.j 3en2f0*djy d0bg 8.0 s?

  In Fig. below, what is the displacement from 0 to 8.0 dwetf(dq ;(., 7-c;mthycy sn s?

Does a car speedometer measure speed, velocity?(b6e6yc69k jfasp ,n j {speed|velocity}

  An object can have a varying speed if its velocity is co; hzi+js 2bzggk3xc2.. dfyg6 nstant.

  The velocity of an object can be negative when its ac jz*7u+ga8acqwkpciw 8 d6u): celeration is positive.

  If one object has a greate lubbh+*b/c2 br speed than a second object, the first must have a greater accelerati2l *bu b+hcbb/on.

  Two cars emerge side by side from a tunnel. ),w woq j,r.;q -p xxn-j;ilavz5 z3grdt/(niCar 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 speezxs - oqd-d -b31p f;q e41xgpn(;w+tly imot(d as its acceleration decreases.

  A baseball player hits a foul ball straight up into the dph3p u m7m7-qb)f/vqair. It leaves the bat witdf)7u3 b 7mvh qpp/mq-h a speed 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 happeny.e0/k e:7x-y - xcsuxa0kswmu5gl y )ing to its acceleration, how does i-al- 0: )5mecsy.sekgx0/xuk 7wy uxyt change if air friction is ignored?

  As a freely falling objec6gq do 2sq,t ai8:g-5 kks6bgjt speeds up, what is happening to its acceleration, how does it change if air fr: 6sqdg big6j at5gskq8k2o,- iction CAN NOT be ignored?

  An object that is thrown vertically upward will p4 (ykphke);nreturn to its original position with the same speed as it had initially if air resistance is negligible. If air resistance is appreciabl(eyk nk)h4pp ;e, how will this result be altered?

  An object can have zero velocity and nonzero acceleratxt.f z+ z,y7jqion at the same time.

  An object can have nonzero velocity and zergj,3j a0.(k ruvlhjp:3oc 6 ugo acceleration at the same time.

  An elevator moving from the second floor to the fift.r-dxo5 m+s ;e yxx7jbh floor making no stops along the wj-e;mx.7bx5 yxrs+ doay has zero acceleration all the time.

  A rolling ball moves fwsqd5j: d,690fbrwa srom $x_1=1.8 \mathrm{~cm}$ to $x_2=-5.8 \mathrm{~cm}$ during the time from $t_1=2.8 \mathrm{~s}$ 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 $t_1=-4.6 \mathrm{~s}$ is at $x_1=3.3 \mathrm{~cm}$ and at $t_2=4.0 \mathrm{~s}$ is at $x_2=7.8 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete laps ar*k4okwtp-l )tound a quarter-mile ($1 \; mile = 1609 \; m$) track in a total time of 12.1 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, movi.rv q03me hwq*d79ffmng 94 m away in 10.0 s. It then turns abruptly and gallops halfway back in 4.8 s. Calculate (a) its averagq*w.mref qfd 3h09m7ve 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 r0ix)zb /c)oh$11 \; m/s$ to $24 \; m/s$ 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 fro hk w0uoh99vqzb68f7vm $21 \; m/s$ to rest in a distance of 80 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reach a speex7qbur 8b yq16at+jzrhk4 +-cd 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 b4gyvj* * v+3ibk rr kzs(5doo:urst out of the blocks to essentially top speed about kr*d:+vj(gko oiv ry*b543 sz$11.0 \; m/s$ in the first 14.2 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 uniformly from a speed hp z7 rc0 px/(dz m/edsy.*.2yjyhcr3 of $19 \; m/s$ to rest in 5.53 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 op+m go3c*so .et.fe6 bn the highway. Assuming a decelf*..m6bgteoces p+o 3 eration of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truc0e;honuem zui:u(kt +n9os8 2k going $25 \; m/s$ 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. Af0pn.b-4mt kcyter exactly 27.0 min, there are still 1100 m to go. The runner mm0y.4knctb- p ust then accelerate at $0.20 \; m/s^2$ for how many seconds in order to achieve the desired time?    $s$