Suppose that an object travels from 8c,5v*nnjcw hjug 9:ione point in space to another. Make a comparison between the displacement and n jwn,ju 9h8gi* :cc5vthe distance traveled.

  When is the average velocity of an object equal to the instantaneous velocity?-)nrajt co4u46gwa m;2r 1f st

  A new car manufacturer advertibas5 -qhdf8m6tus 7;gses that their car can go "from zero to sixty in 8 s";uhdag -sqsm b 7t6f85. This is a description of

  An object moving in the +x axis mf kz5h0-ctre olu(z) /m ee23experiences an acceleration of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to the East (+x direction) beginc 6l ,b5(.gvn0bnjban 3 9v1sj zf+avws to slow down as it appro azv9 vcfba3s.vg,jnl wb(1n6bj5 0+n aches a traffic light. Make a statement concerning its acceleration.

  Suppose that a car traveling to the West (-x direction) begins to slow down as iaf:m;l5.dz/ddsce 7bur zj5(t approaches a traffic light. Make a statement concerning its acceleratij(mdb 5:5.dzarde;f su7c/z l on.

  Suppose that an object is moving with a constant velocity. (cm 3(dusabc ijq( pg32m;v.c Make a statement concernicumdc (2bgi.p;qs ( m33c(vaj ng its acceleration.

  If the velocity of an object is zerojo) hdl/9k mi- p,6lamx78yst , does it mean that the acceleration is zero? Suppor tm-xa7p yi/9l slh 6,ok8j)mdt your answer with an example.

  Can an object's velocity change direction whyf 3c1t7wq;if p+j-sken its acceleration is constant? Support 3 t -kypcf 7sf;j1+wiqyour answer with an example.

  Suppose that an obje :1h,7kjug4puev t0fjct is moving with constant acceleration. Make a statement concernin0:jp tvu 4kgj1 ue,fh7g its motion with respect to time.

  Can an object have increasing speed while its accezu h3,.q8 ovpileration is decreasing? Support your answer with an example.3hzv8i,q oup.

  Suppose a can, after ank0 -em 56ue 4lynlmq*x initial kick, moves up along a smooth hill of ice. Make a statement n06qu4 yk -*em5llex mconcerning its acceleration.

  Under what condition is averagexk)2q mfq)z1 k velocity equal to the average of the object's initia2kx ))q 1qmfkzl and final velocity?

  Objects A and B both start at rest. They both accelerag )cnqknd35 yopmy3- 0te at the same rate. However, object A accelerates for twice the time as object B. What is the final speed of object A compared to that of obje3dq-y 3p nygn)o05k cmct B?

  Objects A and B both start from rest. They both accelerate v;j3:r5u 3gwmm. dygjdeqy35 9n njz)at the same rate. However, object A accelerates for twice the time as object B. What is the di yqjwye33dndj gn5;5. 3j)zum mr:v 9gstance traveled by object A compared to that of object B?

  When an object is released from rest and falls in the absence of friction, whjb0 rp:gvsts n.j :.-5 0akcftich of the following i .0r:sj0sctv n5jpt.gaf:-k b s true concerning its motion?

  When an object is released from rest and faqjldha1:o1cbc4 9pg - ralf7i9ffs 71 lls in the absence of friction, which of the following is true concernin bf11 dg alfl 1j iosp97q4h7c-c9a:rfg its motion?

  Suppose a ball is thrown straight up. Makul(,5 szu )*w0x gzyqee a statement about the velocity and the accelerationq)5g zl*y, 0uesx(uzw when the ball reaches the highest point.

  Suppose a ball is thrown straight up. pptl+ :87p jrdWhat is its acceleration just before it reaches its highest point?8tr7ljp: dp+ p

  Suppose a ball is thrown straight up, r amuh k;ab)7ahb+zv* ;eaches a maximum height, then falls to its initial height. Make a statement about the direction of the velocity and acceleratahvkz+maa)h;b b 7*;uion as the ball is going up.

  A ball is thrown straight up, reaches a maximum height, then falls to its iqxn0xazl 66 ;lnitial height. Make a statement about the direction of tzx;660 alnlx qhe velocity and acceleration as the ball is coming down.

  Suppose a ball is thrown downward in the )h 8yxjz2v*csa,rg:f9hj4f fra ( ws8absence of air resistance. Make a statemev,49 (fys c 8aw:)hf*8jrghr2fzj axs nt concerning its acceleration.

  Suppose a skydiver jumps from a high-flying plane. What is hercw ukbc0rn3(cs +r3 36h76odw e9ajfc acceleration when she she reaches termisj3dac9 ruw (70cherf+n3wc6 okbc63nal velocity?

  A ball is thrown vertically upwai z9 8cyihn:8r2 :yvlw c11beord with a speed v. An identical second ball is thrown upwar c1n8czeiy8v b ow 21iy:h:r9ld 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 buildinkebu+df)qg4 m8riv d,i-h)8 jg. One second later, ball B is dropped from the same building. As time progresses, the distance k- q rf )i8) 84gemi,djuh+vdbbetween them

  Ball A is dropped fromf4 ri /sq)5nnm the top of a building. One second later, ball B is dropped from tnmn4q5f/s ) rihe same building. As time progresses, the difference in their speeds

  Two objects are thrown from the top of a tall building. One is thrown up, ijro3-ds)y ,dand the other is thrown down,rs 3y o-d,jid) 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 second brick is 0iiac)x tewu2k.t2-gx a5 ji*g )dgw.thrown straight down from the same building. They are released at the same time. Neglect air resistance. *x)wk5cj ewgi gx.2td02i u.at ) aig-Compare the accelerations of the two bricks.

  An object is moving with constant non-zero velocity in bc05qvsfb/ a0hb6/-p8l t3z iy1 u:i 5nkocehthe +x axis. The position versus time graph of this objectvecfocp 0-0 yu:tblih 51386/bh 5a/bki znqs is

  An object is moving with conswbf/ r .ec/k(ftant non-zero acceleration in the +x axis. The position versus tfrf/b( wk/.ec ime graph of this object is

  An object is moving with constant non-zero velocity in the +x axis. T5ixh7 t4c n.n7 f9ry cgc2b3ov6 4sdurhe velocity versus time graph of this o3h sct dn7cn96gc4.vr oi 42yx57burfbject is

  An object is moving with constant no5wf xzjdiwrx3t p he-042a0z 3n-zero acceleration in the +x axis. The velocity versus timezwzjd40 ix ap 50f3hrt2w-e 3x graph of this object is

  The slope of a position versus time graph giv+f:0th ft kl1lu o8s(hes

  The slope of a velocity versus t,u7kpf/..)p4iyl e c*0xfsue8dovetime graph gives

  The area under a curve in an 1xe5-)ikb vcsa6xpxm b9 lzap 6 8l-l+acceleration versus time graph gives

  The area under a curve in a velocity versus time graph ghw1*i7 j vtog*ives

  If the position versus time graph of an object is a horizond,98sj ljiydvq4-q *hxm)gf (tal line, the object igxjqlimsd(fq) jv- h84*y9,d s

  If the position versus time graph of an object is a vertical line, the objpa:.) drc,r:;i a9 vhuuvq 1flect is:f.,ru;a:r9pl dvhq )v1i ca u

  If the velocity versus time graph of an object is a holqef; : zyvh8 y-9mrj+rizontal line, the object isq; 9 hleyj+ v8f-r:zym

  If the velocity versus time graph of an object is ac dneq, ka5*l9 straight line making an angle of 30 degrees with the time axis, the object is l9d*c5 eknaq,

  An object moves 15.0 m north and the70nke*z ++ b3z)- pbsytprursn 11.0 m south. Find both the distance traveled and the magnitude of ts7-t*nbpry+spezu+ br3 k z0)he displacement vector.

  A boat can move at 30 km/h in still rts 1up: /a1llwater. How long will it take to move 12 km upstream lp1u/ st l:r1ain a river flowing 6.0 km/h?

  55 mi/h is how many m/s? (1 mi = 1609 kwao /zeuh)j-rn5 : )rfl6k(um)

  What must be your average spee7m;,n(ra:fk trxeknlybi0g 6iu //7c d in order to travel 350 km in 5.15 h?

  A runner ran the marathon (approximately 42.0 km) in 2 hours and 57 min. What (re mfa/tyg s 7a4+ sabr)s2ywtwt9(-is the average speed of the runner in m/waa 9t-ts4() (/ryw2b+ g7asr fmstyes?

  A car travels 90 km/h. How long does ive/ j6 8/ ;.o;kk b8kfzbuxxbtt take for it to travel 400 km?

  A ly (light year) is the distance that light travels in one year.-z/*iv(j ,bl kt qlte, The speed of light isl*t(/q zkvet ,jil-b, $3.00 \times 10^8 \; m/s$. 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 thtmbye), *4dz/ *6w ly+pjjniu e side for 4.0 s, how far do you travel during this iny )uez+jl*pb4 6iw* ,tyjdm n/attentive period?

  If you run a complete loow;v1-djvu 1hj p around an outdoor track (400 m), in 100 s, your average velvw 11dh; u-jvjocity is

  A polar bear starts at the North Pole. It travels 1.0 km south, theneeen:; (r-wmg 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. What was the beamr(n:;eewge- r's average speed?

  A polar bear starts at the North Pole. It travels1,s cdc//zkimhl -( h3pyvz- b 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. What was the bear's c(1zhcylshdivz 3- bkp//m,- average velocity?

  You are driving home on a weekend from school+sjj(73n9qb o sj -hjr at 55 mi/h for 110 miles. It then starts to snow and you slow t+ jhqr js39obj7ns-(jo 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 km/h. What is t:sogop12) qc aq g*0p+qr9zeshe average speed of the motorist fozq pcos)9g g*: eq2 +0apsroq1r this trip?

  A motorist travels for 3.0 h at 80 km/h and 2.0 h 2 pw7x 7h,plo-m wxuo.kggre q0-7j/v at 100 km/h. What is her average sp-7o/-mhgq7kpo el uwg.2xjvx7w0, p r eed for the trip?

  An airplane travels at 300 mi/h south for 2.00 h and then at 250 mi/h north bxpf*5v*udjhz4uf (r)rn ./d pllub *- 9 k)vvfor 750 miles. What is the average speed for the trip?v-/uur)bdun h4 *.z*l 5bf p px)kvd f9lv*rj(

  In a 400-m relay race the anchorman (the person who runs the last 100 m) z 0 mnryz :4, h4lpgqkm37hdd7for 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 , md0l4m7hn pzkd qh 43z7:ryglargest 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 t /l7z97 q/n9glvxcvecar's average velocity during decelen e7 vqt v99gxzl7/lc/ration was 53 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 rw 9o v(f;neq t)an4rb3ate of 3a );be4tqvo9 (w fnnr$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 krzlu+m.*+-*sa vok y-socab /m/h accelerates 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 reshgrhnipak ;p +nz-7( t2ub*v4 t 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 m/s for 10 s. It then speeds up with a constant accel;iqc1 mv4a) +aolxz-geration o;c-zqml 4i 1a)o+xvgaf $2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial velocity of 4.3 m/s experiences a c04o joymta(4gpv-o )o onstant acceleration of 4po govot o0)m4 a(-yj$1.0 \; m/s^2$. What is the cart's displacement during the first 6.3 s of its motion?

  A bullet moving horizontally to the right (+x directjply 0 c3*f.sms6lw 2 )mksv*qion) with a speed of 416 m/s strikes a sandbag and penetrates a distance of 62.l)0pw s.jykmc6m*qv*sl f3 s2 96 cm. What is the average acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is launchf y :(yev3:xo(yx:7mbv g.b zzed from a catapult on an aircraft carrier. It reaches a speed of 42 m/s at the end of the cata bv bx:7o gvy mz:.3fexy:z(y(pult, and this requires 2.0 s. Assuming the acceleration is constant, what is the length of the catapult?

  A car starting from rest moves with constant accelera, )l5.,h6wvl3 5bgzk + kgtnh igfuu+ttion 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 distancy /b g bu18+:npezl,4w13h poiib0xqhe of 200 m. What is its average acceleratioql 103yu/hn w, b1ixop8 +z:4e bpgbhin?

  An object starts from rest and undergoes uniform acceleration. 7xh)nvqn+a 3 lqsm*dxly+/+.iy-u nhDuring the first second it travels 7.2 m. How far will it travel dln/xiql)3v+x+m qu+h * .nh7a yds yn-uring the third second?

  An object is moving in a st;*nuqv p ri/x*igjyay..g 3d8 raight line with 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 this t j.gvdpagx ryiu8;qn*/* .iy3ime?

  A car starts from rest and acceleratefb1 z7ex2d r.o;u)ve cs 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 tire x -uw1yla(y,l2sv y2ns 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 traff nc5.uexrge h02q1u0a ic light turns green, a car that has been waiting at the intersection starts ahead with a conshe0. r15qauecxg2n u0tant 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 ixyl8de0z1 mc - ,jpnmar- v61on the surface of planet X where the ,l 6nemypax8-1j rd1 zm0ic v-acceleration due to gravity is $1.5 \; m/s^2$. What is the maximum height reached by the object?

  An object is thrown upward wakb(8jlrr/3r)nrq :ybx+ .6z6f bjjxith a speed of 12 m/s on the surface of planet X where the acceleration due to gzlxjk:+/ ab n( brjb)36 f6.r8rrjxy qravity 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 the surfa dam;,zsff) h;ce of planet X where the acceleration afm, ;h;) dszfdue 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 om 9+xrx+or5b m*t m7mon the surface of planet X where the acce9+ rx5o+7m mtmomxr*bleration 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 h/c gw- 7o7pmc8q6 adpfriend holds a ruler between your fingers and releases it without warning, how far can you expect the ruler 6a c7 m7ppq/doh g8cw-to fall before you catch it?

  A ball is thrown upward at a velocity of 19.6 m/s. What isv 6r+dyo 7uqs4l) qx7ka 3,afe its velocity after 3.0lr,ue734qv 6o 7 kd+syfqaa) x0 s?

  A bullet shot straight up returns to its starting point in 11 s. Wpswtpu ,) *4cehat is the initwc,4u sp)pt e*ial speed of the bullet?

  A ball is thrown straight8da.8k 3irhb k up with a speed of 36.0 m/s. How long does it take to rk3 ridka.h8 b8eturn to its starting point?

  A ball is thrown downward frug f-we3fdoge68 klrjptvo g;8 0.(s+ om the top of a building with an initial speed of 6 m/s. It -le0;8oge6p w 3rs+.t(dof f gu8vgkj strikes the ground after 3.0 s. How high is the building?

  A ball is thrown straight up w e:1,g v3uhrg.y9)d1zttkzqvith a speed of 30 m/s. (only fill in numerical value in the bl )9v1 zqveht,kgd ygtz.1ru:3anks)
(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 thc7so o6jdq7-(h gg 0kle air with a speed of 29.5 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 3 seconds later.  (数值)  $m/s$
(e.) Determine the time at which the ball pass a point 12 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 12.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what is the vet3n tof( -.rlslocity at t = 1.0 s?

  In Fig. below, what is the velocity attkfba+j1, lg9 c4c 9 tprn8w4y t = 2.5 s?

  In Fig. below, what is the velo jbuqsx,wlhm5z n1gd5t., v8 2city at t = 4.0 s?

  In Fig. below, what is the velocirc;l fb,dfc ex 9,f1p1ty at t = 5.5 s?

  In Fig. below, what is the average vf .dv64zfi2pmt1 i cadel* q5e( g3m,yelocity from 0 to 4.0 s?

  In Fig. below, what is the average velocitfgq vz3o8ggl o l626t(y from 0 to 6.0 s?

  In Fig. below, what is the acceleration at 1.0 s?8yuled8ra, zh a u.7j7

  In Fig. below, what iscc zu hw5li8i,6mec4z :al v/- the acceleration at 3.0 s?

  In Fig. below, what is the average ao 2m6z*zap8/bias l qjiz)..ucceleration from 0 to 5.0 s?

  In Fig. below, what is the average acc64tw ze*wjj1c eleration from 0 to 8.0 s?

  In Fig. below, what is the displac0co, :3adbm/tt oa2 uh mt:7sfement from 0 to 8.0 s?

Does a car speedometefaem+5::un lur measure speed, velocity? {speed|velocity}

  An object can have a var3 y btgqf0)wd+ying speed if its velocity is constant.

  The velocity of an object can be negative when its acceleration is positit;)eyhu7v;s 9qqd3m g ve.

  If one object has a greater speed than a second object, the first must have i -nk1of jgi6knh /2p7a greater accele7ohjp2i k6nkif/n1 g-ration.

  Two cars emerge side by side from a tunnel. Ca 3wk9s5wfj5u0u8 +xgczb t6x lr 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 decreasa rr 9:a h3n(6g;rrzlees.

  A baseball player hits a foul ball straight up int m99voi7:o,u+e0i gonuwtcf f 3ibl/z tj54n1o the air. It leaves the bat with a spe5/niutzw o bf :iit0+c,ln1vu9 m4j 73f9o ogeed 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 s(vjzud h-,gqq,az osp4f-,1 ipeeds up, what is happening to its acceleration, how does it change if air frict-(qqsi4jguf,z ap,- d 1zho, vion is ignored?

  As a freely falling objy/ 15g) msuu+jk3jjxigl 34fnect speeds up, what is happening to its acceleration, how does it change if air friction CAN NOT be ignos mg)xjj3iy fk1g /3ulu5j+n4red?

  An object that is thrown 6myqhuut2o*i* jan*;- pa (ia vertically upward will return to its original position with the same speed as it had initially if air resistance is negliu 6na*qto2i* h ;y*iamp(aj-ugible. If air resistance is appreciable, how will this result be altered?

  An object can have zero velocity and nonzero acceleration at the same time.x-bc :q- /obhk 6i2neo09nalb

  An object can have nonzero velocity aw8w byxi oc7 )a.d ithxxl3823nd zero acceleration at the same time.

  An elevator moving from the second floor to the fifth floor making n obv yvzs pa;d3g,m-06o stops along the way has zero acc;ad b-gyv 0oz,6msp3v eleration all the time.

  A rolling ball moves frbssa:vo:. hj ;om $x_1=1.7 \mathrm{~cm}$ to $x_2=-4.9 \mathrm{~cm}$ during the time from $t_1=1.8 \mathrm{~s}$ to $t_2=6.0 \mathrm{~s}$. What is its average velocity?  (数值)  $cm/s$ (only fill in numerical value please)

  A particle at $t_1=-2.8 \mathrm{~s}$ 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 cov q)d(qx; u 2uipfej(.mplete laps around a quarter-mile ($1 \; mile = 1609 \; m$) track in a total time of 9.6 min. Calculate (a) the average speed  (数值)  $m/s$ and (b) the average velocity    $m/s$

  A horse canters away from its trainer m3rf*bgsgegw; d*5 3tin a straight line, moving 105 m away in 9.1 s. It then turns abruptly and gallops halfway back in 4.5 s. Calculate (a) its avert*f s 3gw 5emgg;3b*drage 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 m)jon hguz obr(9,4(s $11 \; m/s$ to $24 \; m/s$ 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 *qfnw6zwz r rf*z-g 4q:8jfh/$18 \; m/s$ to rest in a distance of 71 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reach a speed omqf. 7i9h:whzjb /a,7c i lo2qf $29 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $2.1 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinter d dx82t-mtmhc tx.,w0 can burst out of the blocks to essentially top speed about xdt.mc8 0h2w-dmt, tx$11.1 \; m/s$ in the first 10.9 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 ofn)hd,/xe *ado m5d i50f pn8fc $17 \; m/s$ to rest in 4.02 s. How far did it travel in that time?  (数值)  $m$

  In coming to a stop, a car leaves skid marqv;6i0jud3 .oausg ,lks 92 m long on the highway. Assuming a decell; ,30uqdo j viuga6.seration of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck guetr;x6g/h: t 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 is,nh/poq a y j9sgqy91 te)z80n less than 30.0 min. After exactly 27.0 min, there are still 1100 m to go. Tpz s9/a),sq1y8 g qh yotj90nehe runner must then accelerate at $0.20 \; m/s^2$ for how many seconds in order to achieve the desired time?    $s$