Suppose that an object travels from one point in space to anom 3c 6t/e wbt58ddeb ie2n6yfe022ceather. Make a comparison between thiy2 e 2 e5aftd08etd3eecb 6/n6cb2wme displacement and the distance traveled.

  When is the average velocity of an object equal 0gh,j4c w/j 6lszs(tk+ - mtqito the instantaneous velocity?

  A new car manufacture3kiwp*o, bo)wki t.eg .cpn)rmugo/,ki;* d) r advertises that their car can go "from zero to sixty in 8 s". This is a descript piog o ,)gkp*c*em)ktind.3 ko),uwwbi/ ;.rion of

  An object moving in the +x axis experiences an acceler7phhale * i./kao o:9lx;myt0ation of $2.0 \; m/s^2$. This means the object is

  Suppose that a car travelingw7u8 : jkn(cgsvaaafx ,36km 0 to the East (+x direction) begins to slow down as it approaches a traffic lig87xsw:c(k0ag k uvf,n3ma6 ajht. Make a statement concerning its acceleration.

  Suppose that a car traveling to the West (-x direction) begg0dzmd-2v: y xins to slow down as it approaches mzy gdx -0:v2da traffic light. Make a statement concerning its acceleration.

  Suppose that an object is mohg3vx8fc4u/ s ving with a constant velocity. Make a statement concerning3/fh8 u4 cvxgs its acceleration.

  If the velocity of an object is zero, doet ij rkgc t5uc--64rg)s it mean that the acceleration is zero? Supgt c4t-ji5 rcg6-rk) uport your answer with an example.

  Can an object's velocity change direction whe3l/ m u i6o3h7pdj6ovan its acceleration is constant? Sup7a36dvmil/6 3p hj uooport your answer with an example.

  Suppose that an object is mo gbp9kywx(x gtb7e-f 0/2rkb1 ving with constant acceleration. Make a statement concerning its motion with respect to time.k1 t9(x ex7g/pw 2b-kyf 0bgrb

  Can an object have increasing speed while its accelerati7ggnvsw.kbl)d8 ,k- y n14ddson is decreasing? Support your answer with adns gvy.d) 8,71dskn wl-4gb kn example.

  Suppose a can, after an initial kick, moves up alon9 pkdc,qws86snxf mg0/s.x4tg a smooth hill of ice. Make a statement concerning its accelerat/q0c .48,wt9s mxgdp kn6sx fsion.

  Under what condition is average velocity equalxmgwxeuh x3l q:4l*- , to the average of the object's initial and*x:uqell xhm- 4xgw,3 final velocity?

  Objects A and B both start at rest. They both accelerate at the same rate. -jfwm 7k-- muq However, object A accelerates for twice the time as object B. What is the final speed of object A compared to that of object B?--fm-kmj7u q w

  Objects A and B both start from:bvw z(g9f1f dk( fm5g 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 object A f1g(dz kw ffmbg59:(v compared to that of object B?

  When an object is released from rest and falls in the absench9qhxy6p3x6.knv pu: 5 bert0e of friction, which of the foll k9.vu rtypnxxh6qp:5 6b0 3ehowing is true concerning its motion?

  When an object is released from reu f7dmehq ,9r1st and falls in the absence of friction, which of the following is truqef9d7hr u1m,e concerning its motion?

  Suppose a ball is thrown straight up. Make a statement about the velocity a/v1i5+ p-glb+leio daebj 3p8nd the accele ale -iji/pbo1 +l8gepb+5dv 3ration when the ball reaches the highest point.

  Suppose a ball is thrown straight up. What is its ac tqzlgsvx9* :z6kp*u5 d0dmo8celeration just before it re t9z 6v0zukmd5*g8 xl: ps*odqaches its highest point?

  Suppose a ball is throwy jpl6/b( zd9hn straight up, reaches a maximum height, then falls to its initial height. Make a statement about th jhl(y /d96bzpe direction of the velocity and acceleration as the ball is going up.

  A ball is thrown straight up, reaches a maximum heig+ wvkvs22 .5ltzarp* bc-hqg+ht, then falls to its initial height. Make a statement about the direction of the velow25v2+z -*kps.arqv b lc ht+gcity and acceleration as the ball is coming down.

  Suppose a ball is thrown downward in the absence of1:7u y q:xlvn1nr5uil air resistance. Make a statement conc yu inrx5l71q1un ::vlerning its acceleration.

  Suppose a skydiver jumps from a .ee7b,t0)x 1ee,fype3 vq t xlhigh-flying plane. What is her acceleration when she she reaches terminal ve epyt)qe01 tx,xefv b.e, 7l3elocity?

  A ball is thrown vertically upward with a speed b v5xyr.2j0n7 fu2he bv. An identical second ball is thro5 r 2nbvj hx2e.f0uby7wn 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 does the second ball go than the first ball?)

  Ball A is dropped from the top of a building. 0 i 00s2dr/idzom-ro(4fqwbm One second later, ball B is dropped 00bd 0 miw(ifr2 or-dms4zqo/from the same building. As time progresses, the distance between them

  Ball A is dropped from the top of a building.j .xoiv )wja5aj/(qz8lw7 m8s(jfxd+ One second later, ball B is dropped fr8xjwz7 i)djl(s +w qxoj5j afa./vm( 8om the same building. As time progresses, the difference in their speeds

  Two objects are thrown from the top of a tall bzzn)l9c x pt5p4d 0uj0qm b.s7uilding. One is thrown up, and the other is thrown down, both with the same initial speed. What are their speed msb4.570d lp0zqjznx9)tpuc s when they hit the street?

  A brick is dropped from the top of a building. A second buijiu 7g8 *v3zl:ny/orick is thrown straight down from the same building. They are released at the same time. Neglect air resistance. Compare the acc*o yiuz8:gv37/lj uinelerations of the two bricks.

  An object is moving with constant non-zero veke+/625 q9 zwzc tm6)ym irltjlocity in the +x axis. The position vtez rj92tmkiw) z +/65cylq6mersus time graph of this object is

  An object is moving with constant non-zero accelx 3nm6bo*vrl7/y hqn-eration in the +x axis. The posim /nb6q-73n *loyvr hxtion versus time graph of this object is

  An object is moving with consry-ni( .;vtfd:ejj x 2tant non-zero velocity in the +x axis. The velocity versus time graph of this jef ij(xvn ;2y-d:r t.object is

  An object is moving zunnf. u o)vhn:,5sdp5b f;h1with constant non-zero acceleration in the +x axis. The velocity versus timv);hb5 nhu :u5,o 1n.dfn zspfe graph of this object is

  The slope of a position versus time bl(sq b 9sb /:e faw;ep/t7eu8graph gives

  The slope of a velocity versus time graph give e4g7odz/pgg5e w 9cpue)hz(;s

  The area under a curve in an acceleration versus time grapc (b.(m;. novmt2 yv9hwpipb ,h gives

  The area under a curv(ch.sn1h*j8)o g qutpvusg 53g(v n/ie in a velocity versus time graph gives

  If the position versus time graph of an object is a horie5ax uhg 6a)p/qxx;:lzontal line, the object is6lxeq :a/ 5puhx)gax ;

  If the position versus time graph of an object is a 80mufusdr *4z vertical line, the object is0fzrm duus8* 4

  If the velocity versus time graph of an object is a horizontal line, the objecu: ql;/z7hmfe t /uz mf q7hel:;is

  If the velocity versus ti .;+3r1zm ,xvehsir;/bxc*o q ehrb:yme graph of an object is a straight line making an angle of 30 degrem oqxz +b3i;ry;,/:bec r 1hxh *v.rsees with the time axis, the object is

  An object moves 15.0 m north and then 11.0 m south. Find both the distance tp*8g uv w42bi-+ona 7ixr4 xiaraveled and the magnitude of the displacement ivu*-8ag+n 74 bi4xxo ar2pw ivector.

  A boat can move at 30 km/h in still water. How long will it take to move 1 cg+dq 06 f;wzlxt *u)jp+(jft2 km upstream in a river flowing 6.0 km/h?j0;f x c*(+gutlf6pt wj+ )zdq

  55 mi/h is how many m/s? (1 mi =) 4jjiu pmw2s7 1609 m)

  What must be your average speed in order to travel 350 km ao**qlps5zi6 kdt w8.in 5.15 h?

  A runner ran the marathon (approximately 42.0 km) in 2 hours and 57 min. h5nbxokkat1,til;h- u at+-m3y ct i9a0 n1/cWhat is the average speed of the -ob-1h5act na9m1hxyi,l tinuc+0t3; /atkk runner in m/s?

  A car travels 90 km/h. How long does it tak :k qpysqumifc:pn r+42i7.s2 e for it to travel 400 km?

  A ly (light year) is the distance that light travels in one y:e 438c3h kma)y5 xoeqww rq/1oui9 yzear. The speed of light 1i3:)e o x4uho kyeqwzcym8ar 3w/q95is $3.00 \times 10^8 \; m/s$. How many miles are there in a light year? (1 mi = 1609 m, 1 yr = 365 d.)

  If you are driving 72 km/j35 m6r;u1tr bvk yvppb0we- 2h along a straight road and you look to the side for 4.0 s, how far do you travel during this inattentive v0 puj56kbterwm -bpy2r;3v1 period?

  If you run a complete loop around an out 1s)vu lh++w(bfncp2 odoor track (400 m), in 100 s, your average velocol12v pc fn)+w(u b+shity is

  A polar bear starts at the North Pole. It travels 1.0 km south, then 1.0 km ea nfyhl5pvjlz 3 )3z ;g((d4vffst, 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'dlhl ;)gvjyzf45fv (n fz3(p3s average speed?

  A polar bear starts at the North Pole. It t lsnh8gi;k)/ dravels 1.0 km south, then 1.0 km east, then 1.0 km north, then 1.0 km west to return to its starting poinlnsg)8hkid/; t. 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 +lvha8hhhx :yv*1o4 a 110 miles. It then starts to snow and you slow to 35 mi/h. You arrive home after driving 4 hours and 15 minutes. How far is your hohh h a ya*4l+1v8x:ovhmetown from school?

  A motorist travels 160 km at 80 km/h and 15 bc:o+thvc 9w60 km at 100 km/h. What is the averagth+bvo ccw :59e speed of the motorist for this trip?

  A motorist travels for 3.0 h at 80 km/h and 0bxa b)ef92g zu7c b1g2.0 h at 100 km/h. What is her average spe 1g97x c0 abe)bfbzug2ed for the trip?

  An airplane travels at 300 mi/h 4ftw)( rcpkk( south for 2.00 h and then at 250 mi/h north for 750 k (krp)f4(tcwmiles. What is the average speed for the trip?

  In a 400-m relay race the anchorman (the personzssuryp(1* d98qrjo 40 4xl;lra.r f y 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 r0fa9; y.os*ld l p8 jqxy(r1zr4usr4the 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 ca9h/srif g1m6t1s fx+ i7qnqn. xx4r ;hr's average velocity during decelerati xrfqg hnns1r6+ mqi 7f.stx9ih1x; /4on was 46 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 f c)mos:nr)h8*gn*pfir g(. ylea(k4tyxz)+ of p4*( gh (oz y 8s.mixr*ng )nt))+kaf:efylrc$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h ac)cu2f2itwj2* c lsi9dcelerates 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 andawa qxaz9(j1un/wi m:q/x c3, 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 speeds up with a constant accelerat5m )rsq4 ps80nenytogq u- 1 +nyae*)aio n n4-aotry50eanqpg)us q my+8*se)1n 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 2.5 m/s expp g6jksy7.yb7 0 crgfoaq .36teriences a constant acceleration of .g0 6gy k6oy 3cbptrj7s.fqa7$2.3 \; m/s^2$. What is the cart's displacement during the first 4.2 s of its motion?

  A bullet moving horizontally to thx-/vkt8upn0 /cf cn t2e right (+x direction) with a speed of 576 m/s strikes a sandbag and pen/x c/2t nvuc8 f-p0tknetrates a distance of 36.72 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 c.jmc9n+u/(* i -xgudpx5qsgcarrier. 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 catapul +j.-igc *qxc5sd gm( un9u/xpt?

  A car starting from rest movetv) f8+4- kr7m *ia wv0dfj 5mzmlc4qrs 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+h tyeito5,*z;sxj4i 80 m/s in a distance of 200 m. What is its average accelera;sjy5*4t, o xz+htiie tion?

  An object starts from rest and undergoes uniform acceleration. 0k1bebbcl 3i7During the first second it travels 6.5 m. How far wic31kbbi e70lb ll it travel during the third second?

  An object is moving in a straight line with constant accevs1( g f.yui+ko6us 8 doye/i/leration. Initially it is traveling at 16 m/s. Three seconds later it is traveling at 10 m/s. How far does it move during this tie.//(s1udo y iiu6kfg8os v+yme?

  A car starts from rest fq9qtw ki/0 l3)z(/ 4ofhfpsard+)u land 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 tirep,r+i mk:x u 5mlev5)fs on 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 hasg,kz g c7y1.agghi f45 been waiting at the inteh7if5gc ,z.g1 gya4 kgrsection 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 qbou8q+(qx8x the surface of planet X where the acceleration due to gravity 8 xxb(qo8uq+qis $1.5 \; m/s^2$. 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 planet 2 gqb (,qqqi:9vahh.e X where the acceleq q a,9ibq veh2g.:q(hration 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 wipp8v yk7wws *gv :m.wf8h2yl +th a speed of 15 m/s on the surface of planet X where the a.w+ 88kwm7f y phyvp:gs2*vwlcceleration 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 speed of 14 m/s on the sursos8 f 8.shoyj:jqz/y0ks 3;fface of planet X where the acceleration due to gravity hq y0fj8so ss;8:sf3k zoyj./is $3.5 \; m/s^2$. What is the speed of the object after 8.0 s?

  Human reaction time is usually bk 5mmek37dm,k l +f-ogreater than 0.10 s. If your friend holds a ruler between your fingers and releases it without warning, how+- k37bod ,fklme5mkm far can you expect the ruler to fall before you catch it?

  A ball is thrown upward at a velocity of 19.6 m/s. What iu 8u zhskx05vc2h9e0 ilq2k*6d(wqeys its velocity after 3.00 uu 9kh 2 (2ee v6 yzlq*qsich0x0w8k5ds?

  A bullet shot straight up returns to its starting point in 14 s. What is-1br ffu;q 3zx the initial speed of the bullet? xz13qff-rub;

  A ball is thrown straight up wew+q+pfysr*06 v s4iq ith a speed of 36.0 m/s. How long does it take to return to its starting poiq6wy s0+ +fs vepr4i*qnt?

  A ball is thrown downward from thet wgqh2 am3 ;56wfm0 ewckr5)z top of a building with an initial speed of 8 m/s. It strikkwfwthc55)3zqea6g r2 mw0;m es the ground after 4.9 s. How high is the building?

  A ball is thrown straight up with a speedb xa.1;9lmd wx of 30 m/s. (only fill in numerical value in the blank .x9w daxbml;1s)
(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 41f:m30hwa6 ssg .6 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 = 1.0 ,6h*/lhw z nyxdg n;u/s?

  In Fig. below, what is the velocity.:/oo b.o ll13i dcvuc at t = 2.5 s?

  In Fig. below, what is the velocity at t = 4.0 a3:cq6ww m:ljdx*ciwp gn. *,s?

  In Fig. below, what is the velocity at tg rx-regp )h13 ma1;sf = 5.5 s?

  In Fig. below, what is the average velocity from 0 to 4.0 s std.lp+ftp 5gxp e/:9ulm4 m6?

  In Fig. below, what is the average vejv8 yg,rrz;ui*; m 7gylocity from 0 to 6.0 s?

  In Fig. below, what is the acceleratio-tqjh, kv3hv a a8blh7 8ognj)dg8);kn at 1.0 s?

  In Fig. below, what is the acc wp9i fcqag49;e-8suzeleration at 3.0 s?

  In Fig. below, what is the average acceleratin 6a( xia+k8ozc6. act: broi,on from 0 to 5.0 s?

  In Fig. below, what is the average acceln7 izge4nzq/ 3eration from 0 to 8.0 s?

  In Fig. below, what is the displacement from 0 to /+i ;(kj*)nl /bydchvk,kq dh 8.0 s?

Does a car speedometer s.l 6 *brshs0vefq4rq(c7 w(h xc)3vr measure speed, velocity? {speed|velocity}

  An object can have a varying speed if i.gy6 hfzsft8 +ts velocity is constant.

  The velocity of an object can be negative when its2s91 9,fd+ht+qw 4pqh3x w9io rjp kzx acceleration is positive.

  If one object has a greater speed than a second object, the first must have a g1y(0gg.fzhb-efv5ud 64+ go xe cups +rezeg 0+ (b4-u6sgd fh .fv1xg5oypue+c ater acceleration.

  Two cars emerge side by side from a tunnel. Car A is traveling with a s2w0:c+etjstgj2ik.aj z43, ;ebhe qcpeed 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 acceleratiozct*7(z /y 8 rtk7mw 3xmwcy,vn decreases.

  A baseball player hits a foul ball straight up into the5t(oreb6e+qylo; tu3 air. It leaves the bat with a speedqy+ob; u3 eott5l6(r e 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 acceleranxj0d8pgrk1 mp ,5(zz tion, how does it change if aig m1d zpk0rxn(,5pj z8r friction is ignored?

  As a freely falling object speeds up, what l0rv;tj(wo h8is happening to its acceleration, how does it chanw to08r(vj lh;ge if air friction CAN NOT be ignored?

  An object that is thrown vertically upward will return to its original positi*lviw yjo; r54on with the same speed as it had initially if air resistance is negligible.45w ojr* yiv;l If air resistance is appreciable, how will this result be altered?

  An object can have zero velocity and nonzero acceleration at the sam cly ytnkw.m2-p 7u;j2e time.

  An object can have nonzero velocity and zero acceleration at the samru1f q:as+vk )e time.

  An elevator moving from th(gae;m2u kqcr5u 8j) 2r;sy,3i ygzuue second floor to the fifth floor making no stops along the way has zero acceleration all the2 ji u k gr8y5uq;au (suzm3g2cr;,ye) time.

  A rolling ball moves fromq s*;f yel0jz)74rwb3;h ; xemiorid1 $x_1=2.8 \mathrm{~cm}$ to $x_2=-5.6 \mathrm{~cm}$ during the time from $t_1=2.5 \mathrm{~s}$ 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 $t_1=-3.8 \mathrm{~s}$ is at $x_1=2.6 \mathrm{~cm}$ and at $t_2=3.8 \mathrm{~s}$ is at $x_2=8.2 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete laps around a quartd / wm/c1 .i5rignzh*2 af.xnter-mile ($1 \; mile = 1609 \; m$) track in a total time of 6.3 min. Calculate (a) the average speed  (数值)  $m/s$ and (b) the average velocity    $m/s$

  A horse canters away from0o yt/f9 j/dojt9l z*rbb k6 .aj7cmf5 its trainer in a straight line, moving 98 m away in 12.5 s. c ./jlfzo0k5ojtmb9fj9rt *6d/aby7 It then turns abruptly 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 from y:;c :kmyqz *f$11 \; m/s$ to $22 \; m/s$ 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 froa(d mbw8gxo9*4 gm md;m $17 \; m/s$ 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 speed of f)l ygen+ro00*2tqb 9b3bu )-mm xhea $30 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $2.7 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinter can burst out of th( 0 bcbsyhg+w-e blocks to essentially top speed aboutb-y g 0(s+hcbw $10.8 \; m/s$ in the first 14.8 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 fromc4o/ 1hdoqh8v a speed of $16 \; m/s$ to rest in 4.04 s. How far did it travel in that time?  (数值)  $m$

  In coming to a stop, a car len v1-a0m+ q1/qzjzti,x nh gr4aves skid marks 92 m long on the highway. Assuming a decele10z1qm,vin4hrx g t-znja/ q +ration of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck ggpe /lf:uub:+cq9f e ei3rqu:-ha4l0oing $25 \; m/s$ 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. After erv5e,cg:9r x ryr5b8r zp d97tf .-jkhxactly 27.0 min, there are still 1100 m to go. Tdhr ,8:p5frrr. x7b j rcg9t-ye59kz vhe runner must then accelerate at $0.20 \; m/s^2$ for how many seconds in order to achieve the desired time?    $s$