Suppose that an objec;jaoj2 j9m:p1wz0 vbiqrb /ijr.b9zw4t1c /k t travels from one point in space to another. Make a comparison between the displacement and the distance traveled.c9q/b. wz;9ji v1z1 : ai4rkmb ojt20wbj/prj

  When is the average velocity of an object equal to the instantqne-elw0cm y.bmv h91c*ew p-t6 98dhaneous velocity?

  A new car manufacturer advertises that their car can go "from zero to sixtymilu 3qu )2nonow6qjb (dn9/. in 8 s". o uq( )6bnml9 duq wnio2/n3.jThis is a description of

  An object moving in uxl8v( 4 1piv,/o yuhythe +x axis experiences an acceleration of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to thfu+fgd i vq-2:e East (+x direction) begins to slow down as it approaches a traffic -fd+givu: f2q light. Make a statement concerning its acceleration.

  Suppose that a car traveling t.5cxjdcc( /f fa877fcx1anl po the West (-x direction) begins to slow down as it /7c.ccdff ( a57f napcx1lxj8approaches a traffic light. Make a statement concerning its acceleration.

  Suppose that an object is moving with a constant velocity. xe4or 4frqs:kj+d* i: Make a statement concerning itsis4:r4xk:ed* foq +jr acceleration.

  If the velocity of an object is zero, does it mean that the acceleration is zpts9a+dl t z3.ero? Support your answer with ana9p+lzst 3dt . example.

  Can an object's velocity change direction when its acceleration is constant? yvv)zj2b 6 )hiSupport your answe2)hi)vy 6 jbvzr with an example.

  Suppose that an object ngs6vn- -5lqn3gsr:7juan g ;is moving with constant acceleration. Make a statement concernigq5 a:jl7;snr n-n3 -nu6gsvgng its motion with respect to time.

  Can an object have increasing speed while its acceleration is decreefq( ;ci(:o1 xgtzfoepw j;5tlf 2* i0asing? Support your answ5; x0g( iwfq21t;itecoop:flj*f(ze er with an example.

  Suppose a can, after an initi74g5t ot+3 bgtjgxc)e lq e-y0al kick, moves up along a smooth hill of ice. Make a statement concer4yx qg)0g- t+je7 5tlb c3egotning its acceleration.

  Under what condition is average velocity equal to the avera j,np9hh+-uy/po gh8 ksk q7)sge of the object's initial kjukg- p/ ,hnqs7 9+8 ospy)hhand final velocity?

  Objects A and B both start at rest. They both accelerate au*yakbo-xgcuq r /75 4t the same rate. However, object A accelerates for twice the time as object B. What is the final speed o/kcxa4 o57rg*qu -by uf object A compared to that of object B?

  Objects A and B both start from rest. They both accelerate at the same rate. Hn82cmm ih:nnuc1g/d6 owever, object A accnu8n m/d ig 126mcn:chelerates for twice the time as object B. What is the distance traveled by object A compared to that of object B?

  When an object is released from reau(hzgv+5rcb (xn:l e5r .4ho st and falls in the absence of friction, which of the(onc uz:xl5b. rr(ha+ v4hge5 following is true concerning its motion?

  When an object is released from rest and falls in the absencwajhx 3b46i r4e of friction, which of the following is true cjra6w4x3 h4iboncerning its motion?

  Suppose a ball is thrown strai i1nqnwq-n:) 5zmjg)7fai e )hght up. Make a statement about the velocity and the acceleration whiqgmf:i)q a ) 7njn-zhne1w 5)en the ball reaches the highest point.

  Suppose a ball is thrown straight up. What is its acceleration just before ittcf,3 w -myl.zu h)y9r reachetlum-y9 f,rh.3 )zywcs its highest point?

  Suppose a ball is thrown straight up, reaches a maximum height, t)o- +gnrx16nen6 fhaftky w ig;d.k 0)hen falls to its initial height. Make a statement about the direction of the velocity and acceleration as the ball is go0 yf) +kotg)- k iwexdnnr g;nh661.afing up.

  A ball is thrown straight up, reaches a maximum height, then falls to its i:v73b 5mwhkxdnitial heighh7 :kxv5mb3 dwt. Make a statement about the direction of the velocity and acceleration as the ball is coming down.

  Suppose a ball is thrown downward in the absence of air res- 3hp,ck7sljo y2zyi0istance. Make a statement 37,2 k-oyy jsh0i lcpzconcerning its acceleration.

  Suppose a skydiver jumps u0e i a 8gd4n+ofmb.q;/ip( bmfrom a high-flying plane. What is her acceleration when she she reaches terminal velocqif/bm m ;eiud.g+4o (abp n80ity?

  A ball is thrown vertically upward with a speed v. An identical second pai); oy(jcmctc*h-g4l.s u0:)gb j; ec qdf9ball is thrown upward with a speed 2v (twice as fast). What is the ratio of the maximum height of the second ball to that of the first batfccycj0j ; :o);(u*ah il)mpb. gq94-gsc dell? (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 later, ball B oq- y wtbfz0.v yb:gsve60)/nis dropped fromgwvs).y0eybt vf0/n:qo 6b- z the same building. As time progresses, the distance between them

  Ball A is dropped from the top of a building. One secondz -a+5han/1b5 dxf8i7yydxpz later, ball B is dropped8 -y5pdfa5xzd/b i hy7+xnza1 from the same building. As time progresses, the difference in their speeds

  Two objects are thrown from the top of a tall building. One :bwzbdwue a7o1*0m3i is thrown up, and the other is thrown down, both with the same initial speed. What are their s1zu3 7eb :w0imbowa *dpeeds when they hit the street?

  A brick is dropped from the top aqyrs(u u 8-s6of a building. A second brick is thrown straight down from the same building. They are released at the same time. Neglect air resisu- 8qu rs6(asytance. Compare the accelerations of the two bricks.

  An object is moving witjaos (m)- bey.2 gww l* eo-bxt6e/y.xh constant non-zero velocity in the +x axis. The position versus time grap.(oe ea6wlmy- jx)bgwxb2. ey*/os -th of this object is

  An object is moving with conow, ( zvux 9rv+c,xyznuwe76: stant non-zero acceleration in the +x axis. The position versu7vxywuvz,96w, nz+e x(c:o urs time graph of this object is

  An object is moving with constant non-zero velocity in ao 7 5pvxlx7n saj,wqh/ 1au9/the +x axis. The velocity versus time graph of this objew/97h1unq,o/s j75 a x lapxavct is

  An object is moving with constant non-zero acceleaauj1oo2kl,7urz/2 a ration in the +x axis. The velocity versus time graph of this objeo/j 72 a,ular1u2ok azct is

  The slope of a position versus time graphyf +vp k :8- o*s3edaxvy+fl;c gives

  The slope of a velocity versus time go:l t+2u t6wxofne/ z4raph gives

  The area under a curve in an accelerationk xkd ,;k+xht: versus time graph gives

  The area under a curve in a velwpg1f lak46*l ocity versus time graph gives

  If the position versus time graph of an object is a horizontal line, the object)8fy2rjm ;hwtg3h6d.) b rx ff f dj8)f32g.mh)w tbryh ; xr6fis

  If the position versus time graph of an object is a v:b68 , *i,6k pgo9evrfeurwowertical line, the object isv rgokw,:riewo69peb*f 6 8u,

  If the velocity versus time graphy*4;i1h/yln. 0 k 1im hmcmfj5 t4ikrp of an object is a horizontal line, the object is1m yf.icjih*1 4m05rh n;/kli kypm4t

  If the velocity versus time graph of an object is a strw cp 4n/mr8.faaight line making an angle of 30 degrees with the time axi a.pw m8r/cn4fs, the object is

  An object moves 15.0 m north and then 11.0 m south. Find*bo ms-40(f9mnqxl8f h mwycm1sc, ,a both the distance traveled and the magnitux,cwm *4h,o 90a( -l bmsfqn8fm1ycmsde of the displacement vector.

  A boat can move at 30 km/h in still water. How long will it take to move 123tc ; 8mhxq /ww2xdw0p 1jk4wz km upstream in a river flowing 6.0 km/h?3qh /jk8w0zt 4m ;wdc x2wpwx1

  55 mi/h is how many m/s? (ri ak*qj8m ),a1 mi = 1609 m)

  What must be your average sp i 5xk-jp1uax6au: ch(eed in order to travel 350 km in 5.15 h?

  A runner ran the marathon (approximately 42.0 km) in 2 g+4qt85xsa qohours and 57 min. What is the avera5x s+gaq8 q4toge speed of the runner in m/s?

  A car travels 90 km/h. How long does it take for it tl )8;a;zb nmzsi3x07rt .rvvno travel 400 km?

  A ly (light year) is the distance that ls5qzcnda69k n s.w0 o1ight travels in one year. The speed of li1 d zwosknn6q.sc 0a59ght 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 along a straight road 6;y8 6uwcoeijand you look to the side for 4.0 s, how far do you travel during this in6ocu j wy86;ieattentive period?

  If you run a complete loop around an outdoor track (400 m), in 10v l -f5p83xlou0 s, your average velocity 5fl3vpo u-x8l is

  A polar bear starts at the North Pole. It travels 1r rn-.6vi n.9 i13zbl;fo2c ktq nvv4f.0 km south, then 1.0 km east, then 1.0 km north,4ztfq23f1i n; vnrcori6bln -kv v.9. then 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. :bzhgp3, rr 1u 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. What was r1gz u p,hr3b:the bear's average velocity?

  You are driving home on a weekend from school at 55 m y+ (*-*xneio5yod(uzy h ff0vi/h for 110 miles. It then starts to snow and you slow to 35 mi/h. Y(of zyv*5hf (uyoni+0e-d *xy ou 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 g503 2mb rsvmnkm/h. What is the average speed of the motorist for thimm v3b25rn0gss trip?

  A motorist travels for 3.0 h at 80 km/h and 2.0 h)u8 kag5qh .we at 100 km/h. What is her average speed fg.eq)hk w ua58or the trip?

  An airplane travels at 300 mi/ rezn4g6 rur:t9t6cq.u (ov8 uh south for 2.00 h and then at 250 mi/h north for 750 miles. What is the average speed t.t6nor uu4r(r8zuce6g:9q v for the trip?

  In a 400-m relay rac f*f/ri (cm0ooe the anchorman (the person who runs the last 100 m) for team A can run 100 m in 9.8 s. His rival, the anchormai*c fr ofo/m0(n 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 id 9g3ha)-qlb stop after 13 s. The car's average veloc b3ahldq g9-)iity during deceleration was 59 km/h. What was the car's deceleration while slowing down?

  An airplane increases its speed from 1z/ imjkt uults5:7 e2/00 m/s to 160 m/s, at the average rate of i/ jum7t uk/z:5 s2lte$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h acceler ruuv5 za3gj kfqatd8 +zrrb),g8 a098ates 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 rei6m.tbt.0tlq st 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 arqg5tpyhcb* ai )z)qjq*8sq 6 )ror--cceleration ofijr)*g aq -t)rcbzoy h8 r-6s*qp)5 qq $2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial velocity of 6.5 m/s experiences a constant accelera +heq s94e) s,sz2gbiation of +ez ahq)2 ,4 bei9ssgs$4.2 \; m/s^2$. What is the cart's displacement during the first 8.2 s of its motion?

  A bullet moving horizoidvd7;k(:tb mx 3h- ofntally to the right (+x direction) with a speed of 290 m/s strikes a sandbag and penetrates a distance of 64.05 cm. What is the average accelv h3fx (-omk7ddi:b t;eration, in $m/s^2$, of the bullet?

  A jet fighter plane is launched from a catapult on an ;pxr,l7 n/z ;wn1 ir 2wrv wghyn/(d/gaircraft carrier. 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 rp vw7 n1 wh,ggy r/;;2/zdiwrx/n(ln length of the catapult?

  A car starting from rest m/5 o3-d5uqwpogwdbm8 oves 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 80 m/s in a distance of 200 m. cgqg0u7q0(7y 8wj4mjhh2qju +oa 1lye o::goWhat is its average accelerati:48a muo2co7l7(1q hqj:u00oyg jq ygehgw j+on?

  An object starts from resaubo 83 u-wq(xt and undergoes uniform acceleration. During the first second it travels 3.9 m. How far will it tra3u8xu ob-(w qavel during the third second?

  An object is moving in a straight line with constant acceleration. 66o9vj1mtc 06 n au5vk ry-kkwsn)c9k4l- t cv Initially it is traveling at 16 m/s. Three seconds later it is travelim-5t jn-ak9koclr)6 6s 1v tnc0ycuwvk9v4k6ng at 10 m/s. How far does it move during this time?

  A car starts from rest and accelerat-hr c/f 3jkan*es 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 1 e7sragp.y(oypi:; ea 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, ( mhr espuamp9 b)0+y8a car that has been waiting at the intersection ppma 9r8uyhms() be+0 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 ogw(gwll)bcd7-tf8e v+ (endm2d4 e5b f 12 m/s on the surface of planet X where the acceleration due to gravitc(we2f em+8lbt (dl)v5dbwn ge 4-7gd y 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 mk 9 k1j5u1z/rrab n)dc+cwg9e /s on the surface of planet X where the acceleration kngr9z k+c 1j1r9/cuaw) e d5bdue to gravity is $1.5 \; m/s^2$. How long does it take for the object to reach the maximum height?

  An object is thrown upward with a speed of 15 m/s on the se9 acf;p*msv;urface of planet X where the acceleration dm 9ep;;av cf*sue 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 surface ofynu 261+wh4*c msd;yz:ihs(k pv be 4f planet X where the h w( z yh +if2nsed14kv;4 bysm6uc:p*acceleration due to gravity is $3.5 \; m/s^2$. What is the speed of the object after 8.0 s?

  Human reaction time is usually grea,hub+) lzui0oter than 0.10 s. If your friend holds a ruler between your fingers and releases it without warning, how far can you expect the ruler to faul )z0u o,b+hill before you catch it?

  A ball is thrown upward at akkr yh0gpf,k+ luby 2* .f4c;i velocity of 19.6 m/s. What is its velocity after 3.00 bgkk;py2h. i, f40ful ry*k+cs?

  A bullet shot straight up returns to its starting point in 13 s. Wha ,v4;rm-hjhv lt is the initialhjr ,-v4ml;hv speed of the bullet?

  A ball is thrown straight up with a speem+ *6zo :jautwd of 36.0 m/s. How long does it take to return to its starting :m+t*jz6 wuaopoint?

  A ball is thrown downward from the top of a building with an initial speed of 1w8d5d+d5 qloso3a5yc 4 m/s. It strikes the ground after 2.4 s. How high is ths5qod35d+wao5ldy8 c e building?

  A ball is thrown straight up with a speed )+t9 s8whoj gbof 30 m/s. (only fill in numerical value+ wbtgj8 s)o9h in 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 strpt sc .0prn* +hqxcds)ika:n3*l ,, kraight up into the air with a speed of 41.1 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 1 seconds later.  (数值)  $m/s$
(e.) Determine the time at which the ball pass a point 13 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 13.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what is the velocity at t =s,ewd fci9 l:hnzs :w 8)uz8tj9qt,u0 1.0 s?

  In Fig. below, what is the velocity at t = 2.5 lw. jdmw5bwl4gb9v10s?

  In Fig. below, what is the velocity (9 ,wxy(sg5yp2qr tzsat t = 4.0 s?

  In Fig. below, what is the velocity p 7h7hh uko77eat t = 5.5 s?

  In Fig. below, what is the average vet8j( ksd(s/j slocity from 0 to 4.0 s?

  In Fig. below, what is the average veloc2xa, g 9t37, kp6ptoxhpu0mlo ity from 0 to 6.0 s?

  In Fig. below, what is the acceler0cn o.l a) pwxywb:ut y4,4e5aation at 1.0 s?

  In Fig. below, what is th : 1vw jx9j-pe3bo1ndk4f (bxse acceleration at 3.0 s?

  In Fig. below, what is the average acceleratihfo ih/ pp301-7+k.q zrbcd njon from 0 to 5.0 s?

  In Fig. below, what is the average yugil , h6;g0r3 ivfo;acceleration from 0 to 8.0 s?

  In Fig. below, what is the displacement from 0 to 8.0 9gp,n- 3hgwjg s?

Does a car speedometer measurfhwzzr0 k:gp *d+-/gse speed, velocity? {speed|velocity}

  An object can have a;c byl; jt (twib5(r r5/o8rlk varying speed if its velocity is constant.

  The velocity of an object canobo +q flvniv:.t-(f3 be negative when its acceleration is positive.

  If one object has a greater speed than a second or ra99 i8e2fw.lhp ul7bject, the first must have a greater8ri rf.p9a wueh l9l72 acceleration.

  Two cars emerge side by side from a tunnel. Car A is traveling with a speed of :zsml2f kw qe59t.q.k 5 chws,$60 \; km/h$ 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 dec(;l) ;u:ewnvniwo )gj reases.

  A baseball player hits a foth rn,te8-+vo 8a/xqxul ball straight up into the air. It leaves the bat witha+o8n,te x/rhv8 - tqx 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 happeningkxz; 3 .8e0rvl3kxpn x to its acceleration, how does it changx3 v 8p30lenrx.;kkxz e if air friction is ignored?

  As a freely falling object speeds up, what is happening to its accel3myp f ;sa4zo.eration, how does it change if air friction 34 z; omyp.fsaCAN NOT be ignored?

  An object that is thrown vertically upwark6mi-4hpf7ub l8d1 rjlx0 c5 ld will return to its original position with the same speed as it had initially if air resistance is negligible. If ar8mbh1d 56pxf74lcjilk -0luir resistance is appreciable, how will this result be altered?

  An object can have zero velocity and nonzero acceleration at the same nezpjo57z 3w5 o, eby)time.

  An object can have nonzero velo5.;c)s f59mwmh1vaac nr6cyhcity and zero acceleration at the same time.

  An elevator moving from the second floor to ej 4wb --jt2 isl/hp7/x qyzi1the fifth floor making no stops along the way has h24plijx-b / qz/is-1 w7jetyzero acceleration all the time.

  A rolling ball moves frompbi:cot9li.pf w)w 7: $x_1=2.4 \mathrm{~cm}$ to $x_2=-5.5 \mathrm{~cm}$ during the time from $t_1=0.8 \mathrm{~s}$ 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 $t_1=-3.5 \mathrm{~s}$ is at $x_1=3.4 \mathrm{~cm}$ and at $t_2=3.6 \mathrm{~s}$ is at $x_2=7.6 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete laps around a quarter-ebs9 *gg2w +jqmile ($1 \; mile = 1609 \; m$) track in a total time of 11.5 min. Calculate (a) the average speed  (数值)  $m/s$ and (b) the average velocity    $m/s$

  A horse canters away from its trainer ry 7lx-gdpf0n r mn,)-in a straight line, moving 95 m away in 11.5 s. It then turns abruptly and gallops halfr lnxnm0, --)7fy rpgdway back in 4.7 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 fro6,)d9zvhtjulrwg n /e5ij33i m $12 \; m/s$ to $23 \; m/s$ in 6.0 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 7y4sb ut 2/huu lgml* yu6;3hs$15 \; m/s$ to rest in a distance of 74 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reach , v18r( xr;myjrqyh.ta speed of $26 \; m/s$ 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 oua. )e ,p+nbuawqb2yku0e q 4c-t of the blocks to essentially top speed about2 .e0+cpekqa b4)qnya ,u w-ub $10.8 \; m/s$ in the first 12.0 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 unifo:pm ikek4i*y7h ):q qa vrbog7 52xi1vrmly from a speed of $19 \; m/s$ to rest in 4.34 s. How far did it travel in that time?  (数值)  $m$

  In coming to a stop, a car leaves skid marks 92 m long on the xc 2+ya6,w,dpei -vnv highway. Assuming a decele,c+y2w i-d6xp,vna evration of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck goingnx)mh2*y3 hr281vvs q1x l gub $25 \; m/s$ 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.gf:i7, pj6ao:deu2fxz9 k q1u0 min. After exactly 27.0 min, there are still 1100 m to go. The runner 7:kj u192:i xq afgud, oef6pzmust then accelerate at $0.20 \; m/s^2$ for how many seconds in order to achieve the desired time?    $s$