Suppose that an object travels from one point in space to another. Make a comxk4;3iz bk4 tayjc/a9 parison between 4 ac;4bxjz3kkai / 9tythe displacement and the distance traveled.

  When is the average velocity of an object equal to the instantaneocyqus m(ic 9u/ee qn 2n).c-s8us velocity?

  A new car manufacturer advertises that their car can go "froi/tk*w.ph i(c40inmp dtps ,8 m zero to sixty in 8 s". This is*p0i /sc ,pp4ii(ktnm 8h.twd a description of

  An object moving in the +x axis experieq.v sxjtiv70h zs 1x2.,fo3 gdnces an acceleration of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to the East (+x direction) begins to slow down a, 4fu61aufk39p 0hdtbac pd1* 1hkdojs it approaches a traffic light. Make a statement concerning its a*af au,09f1d3jc1dhkpdt16 4hbk opucceleration.

  Suppose that a car traa31jl:xtlf j;veling to the West (-x direction) begins to slow down as it approaches a traffic light. Make a statement conljjxa:3t ; f1lcerning its acceleration.

  Suppose that an object is moving with a constbf c mcr/v 8*zh-iuzra0:n+*uant velocity. Make a statement concerning its acce0*cr: +zuz 8v/am h* f-icrnbuleration.

  If the velocity of an object is zeiu(0:t vy2kvg ro, does it mean that the acceleration is zero? Support your answer with an( u:0i2ktvgy v example.

  Can an object's velo/wu)iv + x8lqvcity change direction when its acceleration is constant? Sux+ )qwvv8u/ ilpport your answer with an example.

  Suppose that an object is moving with cons o6 fdv)s6/lxu zx)t6htant acceleration. Make a statement concerning its mot) 6d 6txuh)l/z xvfso6ion with respect to time.

  Can an object have increasing speed while its accrix+ au sq:+j)eleration is decreasing? Support yoijusxrq+): +aur answer with an example.

  Suppose a can, after an initial kick, /4eprns2-r+ xzmswk3 moves up along a smooth hill of ice. Make a statement concerning ikp4 rmx ws+en s-r/3z2ts acceleration.

  Under what condition is average velocity equal23u; guq92bqxsghm wp6.eso 4 to the average of the object's initial and final vuw4bug3q2q shxp.2;6 oe mgs 9elocity?

  Objects A and B both start at rest. They both accec9tgcj:)eawoo nz .**lerate at the same rate. However, object A accelerates for t 9jog n o)w*z:a*cc.etwice the time as object B. What is the final speed of object A compared to that of object B?

  Objects A and B both start from rest. They both accelerate at the same r7u 9ewmw7 i3yeate. However, object A accelerates for twice the time as object B. What is the distance traveled by object A w ue97y73i mwecompared to that of object B?

  When an object is released from rest and falls in the absence of friction/r st1z6tmzkf: mocx h-)u ,)m3 o/xfd, which of the following k)tfh/zd m f,uxo/mo)cx6 t3z1m : -sris true concerning its motion?

  When an object is released fc9ic ++ - pseqhuf7j(grom rest and falls in the absence of friction, which of the followie(u iph+ -f+c7 gsq9cjng is true concerning its motion?

  Suppose a ball is thrown straight up. M3h)t6m/ 1stz n 2drylfake a statement about the velocity and the acct6dzt3hm2/y1fr l)sneleration when the ball reaches the highest point.

  Suppose a ball is thrown straight up. What is its acceleration hl s bjkw*-s7wk) ,pn5just before it reaches it j)w-ks,7 k hb5npl*sws highest point?

  Suppose a ball is thrown straight up, reaches a maximum height,h7r . 6foh;ne k6dim8c) m-yhi then falls to its initial heightyhhomr-6ndf8i.he6 )km c;7 i. Make a statement 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 46lt5 ns vw7135jd,hqjppl.hn /jga q its initial height. Make a statement about the direction of the velocity and acceleration as the ball is cp.5 4td ljap6ng1lqjh j7,vhwn s5/q3 oming down.

  Suppose a ball is thrown downward in the absence of air resisfx)xlfa0okc 5,9qez)*zm;w k tance. Make a statement concerning its acceleration.k)xf9 f zlxoezw0am,;)* cq5k

  Suppose a skydiver jumps from a high-flying ( 8 ebnaffm+fu85kv:b plane. What is her acceleration when she she remfbau85 f8 +b evn:(fkaches terminal velocity?

  A ball is thrown vertically upward with a 3z- yr1aedvbuz*wpr0 x8 - zx:speed v. An identical second ball 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 ball? (How xd8:y3 v br0*xe1r-zz pzu- wamany times higher does the second ball go than the first ball?)

  Ball A is dropped from the top of a building. One second lap+dp-5g +i bjr1k7jf2,/uahfqpp gd 2 ter, ball B is dropped from the same building. As t +j /q d12phpgjb2 pfpu,ird5g+f ak-7ime progresses, the distance between them

  Ball A is dropped from the top of a buil+ z-gqxo-)zt.qm*wzb ding. One second later, ball B is dropped from the same building. A) tq-z+bw.oq z gxmz-*s time progresses, the difference in their speeds

  Two objects are thrown from the top ofkxy 9 sq4plg2;uk 3*)wd0m pzf a tall building. One is thrown up, and the other is thrown down, both with the same initial u4q wmyf d ;3spgxk9lkzp*)0 2speed. What are their speeds when they hit the street?

  A brick is dropped from the top of a buildin) j0j a+otqwl 5v*5qgf /vklp,g. A second brick is thrown straight down from the same building. They are released at the same time. Neglect air resistance. Compare the accelerations of the two ba5 qj/0*lt lpvvqjfk5g) ow+,ricks.

  An object is moving with cons .y -uyr6g q)gqh2hcgakg6u8 .6d0kfo tant non-zero velocity in the +x axis. The position versus time8fqo6rg. ) k6 qggu6uhdh-02 cay gy.k graph of this object is

  An object is moving w2ege7yb;qw k4 ith constant non-zero acceleration in the +x axis. The position versus time graph of te;w e472 kbygqhis object is

  An object is moving with constant non-zero velocity in the +x axis. Theq:3i5 :s; 2,w dhuiykde,qe ul velocity vers 3h 5qe ,2qi: syk;d,we:uiludus time graph of this object is

  An object is moving with consfos0firy d0s0;g-ti4r86 m* ocsdru -tant non-zero acceleration in the +x axis. The velocity versus time graph o g8srdc-y600-d *mt4usoforirs0f; if this object is

  The slope of a position versux+ vm:v myo 0j3,t2flhs time graph gives

  The slope of a velocity versus time graph give8bf9q (jm*6(vtrt jic s

  The area under a curve in an acceleration 7rcpe1/f*7u g t1yffc versus time graph gives

  The area under a curve in a velocity versus time graph giok*prvl:( oz) ves

  If the position versus time graph of an object is a horizontal linzbvx-hwdz b r71uv 8 n2q y72w(1td0sxe, the object is7vx-71 q h (z28zvubyw tw 201bnxdrsd

  If the position versus time gra gy9ew2 0q0:wx;pm 84r kcnvnyph of an object is a vertical line, the object iswp n80qnrkc x;w:y94em2v yg 0

  If the velocity versus time graph of an object is a horit* okpw44a4i2 l m8awkzontal line, the object i o444kml* 82wip atwaks

  If the velocity versus time graph of an objnn* 0rw g-l(je1x9zzy my(6plect is a straight line making an angle of 30 degrees with the time axis, the ob(g en*p( lzrz x1n y90w6-jymlject is

  An object moves 15.0 m north and then 11.0 m south. Find both the distance tr+9 s g(8ez7ww (wbhracaveled and thz(sc7e9wbrgwh 8wa +(e magnitude of the displacement vector.

  A boat can move at 30qt03h4y t ,rvd5kgwi( du hf+9 km/h in still water. How long will it take to move 12 km upstream in a riv 0vwdgq(5r 4+9f3 kdyt, htuhier flowing 6.0 km/h?

  55 mi/h is how many m/s? (1 mi = 1609 nef;; 8ve u8kim)

  What must be your average speed in obm5 odz9m( 7-r vw5fktrder to travel 350 km in 5.15 h?

  A runner ran the marathon (approximately 42.0 km) in 2 hola9w9b83 -at jghf ibm a6xd74urs and 57 min. What is the avegtabxm3i a9-7 j98ld6 wb 4hafrage speed of the runner in m/s?

  A car travels 90 km/h. Hocd6nk5. 7y/8c n d 0twk8yai 1k*ksaafw long does it take for it to travel 400 km?

  A ly (light year) is the distance that light tra7onoh f*i p0u(o(8p ouvels in one year. The speed of lighoh u(np0 8of(*op7ouit 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 and youpy-d 07sioo: b1z n8tf look to the side for 4.0 s, how far doyi70p 8- z :b1oofdtns you travel during this inattentive period?

  If you run a complete loop around an outd obn;ll+,g* j+w :h+6 yugjov;tca0gboor track (400 m), in 100 s, your average vejv6yb+gn ou+glcl;a : whog0 b+*jt,; locity is

  A polar bear starts at the North Pole. It travels 1.0 km south, then 1.0 km vgi:qnu,f5n78 s n l;x)rc:jw east, then 1.0 km north, then 1.0 km west to return to its starting point. This trip takes 45 min. What vq:xlfwn sn, c n85rui7)jg: ;was the bear's average speed?

  A polar bear starts at the North Pole. It travels 1.0 km soutea/,:6c3 g dtbrnr wx5h, 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 average velocit ,btnd : /a5rew3rgc6xy?

  You are driving home on a wee +cl3fsipt;snprkkhl+/b 38- kend from school at 55 mi/h for 110 miles. It then starts to snow and you slow to 35 mi/h. You arrive home after driving 4 hourr8snk ibhcs+-tl3ppf+3;l / ks and 15 minutes. How far is your hometown from school?

  A motorist travels 160 km at 80 nt zj2y 87zah9km/h and 160 km at 100 km/h. What is the average speed of the mojzy92n8 7 zhattorist for this trip?

  A motorist travels for 3.0 h aq qvpk:, the(c-u1;wv t 80 km/h and 2.0 h at 100 km/h. What is her average speed for the tri ( v qp:1kec;tv,hw-uqp?

  An airplane travels atk;s11/hf wwk uqq*un 8 300 mi/h south for 2.00 h and then at 250 mi/h north for 750 miles. What is the avernwu hu 811ks/ f*qk;qwage speed for the trip?

  In a 400-m relay race the anch.h c;r3r le0guorman (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 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 tcu lgh0 re;.r3eam A runner not lose the race?

  A car decelerates uniformly and comes to a stop after 2x n9yk;2jzer 9 s. The car's average velocity during deceleration was 58 km/h. What was the car's deceleratioj2ynk2 rxez9;n while slowing down?

  An airplane increases its speed from,.h nd* cq(ma 3b7wgng 100 m/s to 160 m/s, at the average rate of ah ndbcn( q. m,wg3g7*$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h accelerates at the rat7ku-33eeeh ip9b,qxx e 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 re id4mjv6w5x :ost 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 thenm w7c)df8m; ol speeds up with a constant acceleration of7m;8 cfol)wmd $2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial velocity of 2.8 m/s experiences a const4l9:jej85sg2 z 0lxhq bq2 xjaant acceleration o8g z5 2aej qsblq2j9:lx40hxj f $1.7 \; m/s^2$. What is the cart's displacement during the first 6.7 s of its motion?

  A bullet moving horizontally to thexsr;uye;yb ltz kq 3zdr33 8-9 right (+x direction) with a speed of 530 m/s strikes a sandbag and penetrates a distance of 78.14 cm. What is the average acceleration, in e3-zyk;ux9l8;zb3rrt 3 q dsy$m/s^2$, of the bullet?

  A jet fighter plane is launched from a catapult on an aircraft carrier; 8c;) a5x6wy cmpbmrs. 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 le8 ;r5mm)p;wycc6xs abngth of the catapult?

  A car starting from rest moves wit3elw7es6dxy8d9*:sv+ zd kiy h 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 804o64 ;oy 2ahmeupoi6b m/s in a distance of 200 m. What is its average acceo y op246u6;4 eamhbioleration?

  An object starts from rest and undergoes uniform acceleration. D2pl(11l ada ms q6bp8ri1 iif*uring the first second it travels 7.9 m. How far will it travel dra1dli8p blaf16i mqi2*p s1(uring the third second?

  An object is moving in a straight line with constant acceleration. Initialcj:3d) wxwy2a ly it is traveling at 16 m/s. Three seconds later it is traveling at 10 m/s. cywx)d :j3a2 w How far does it move during this time?

  A car starts from rest and accelerates+ o dki.b :85zall1jd *ic6cdnq3e pg/ uniformly at $3.0 \; m/s^2$. A second car starts from rest 6.0 s later at the same point and accelerates uniformly at $5.0 \; m/s^2$. How long does it take the second car to overtake the first car?

  A car with good tires on a dry road ca;a12dyih a-o do3v u-en 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 tj7nr 2(x*c s sgr04mzvurns green, a car that has been waiting at the intersection starts ahead with a constant accelers*(rr4cn7 xz m2sjgv0ation 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 o) 3whdk6rbg 7an the surface of planet X where thekw7hr ba6) gd3 acceleration due to gravity 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 jvem9c-2o4 .mt f+u xpsurface of planet X where the acceleration due to gremm-c+jt2.vopu 9 f x4avity is $1.5 \; m/s^2$. How long does it take for the object to reach the maximum height?

  An object is thrown upward wit..wnryc. .eq th a speed of 15 m/s on the surface of planet X where the acce...qetycr .wnleration 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 wit xuf2*;txboei5 tb3 -wbhxp* 3h a speed of 14 m/s on the surface of planet X where the acceleration due to gravity 5*x2bex3pxo-;tu3hw*bb t i f 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.misd;z)yvt :nq + ,0ex If your friend holds a ruler between your fingers and releases it without warning, ho;:m esq), 0vx+ zidyntw far can you expect the ruler to fall before you catch it?

  A ball is thrown upward at a velocity of 1 9ed*.x 4ag,umpni;,w hb:j 4e yrbfk.9.6 m/s. What is its velocity after 3,xw pfyg.r9eu:ie*.k bja,4hb4; m nd.00 s?

  A bullet shot straight up returns to its starting po -yka:7 uhdiga+b-4auint in 4 s. What is the initial speed ofu47g-ah +ykabu i-da : the bullet?

  A ball is thrown straight up with a speed of 36.0 m/s. How long does it;ghzcc( k1isf2h .x nkr:hu29p.w5a t take to return to its starting pointn9ik(;2h2g5 :xat.u zk ps chh r1w.fc?

  A ball is thrown downward from the top of a building with an in9dcm o2-fvso q --jn.pitial speed of 9 m/s. It strikes the grou9jq2co mfd- n-.p o-svnd after 3.3 s. How high is the building?

  A ball is thrown strai5j:uc ygc6f.j; zn9e hght up with a speed of 30 m/s. (only fill in numerical valueche6:fg9 5junjcz; y . 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 straight up into the air with a speed of 44.2 m9j,.li 03( jpt:gww i ,rto b0ru3ypbz/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 10 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 10.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what m zalmt7z);6 sis the velocity at t = 1.0 s?

  In Fig. below, what is the velocity at t = 2.5 sr9fe::k 2wd4mj k,pi k?

  In Fig. below, what is the velocity at t = 4yhws84 +z5 uzc.0 s?

  In Fig. below, what is theb) 44v emgs; a9tcnvt+ velocity at t = 5.5 s?

  In Fig. below, what t1 :,nsz anhi;+ud0ysis the average velocity from 0 to 4.0 s?

  In Fig. below, what is the average velocit9bmvc ) 5c4 ipdvsh,:fy from 0 to 6.0 s?

  In Fig. below, what is the acceleration at 1.0 w 7ztj8v m w)yv)rg-ajpznn hppb,5 m,.q1 y59s?

  In Fig. below, what is the acceleratwk5.ld) zpjnuz8,z5k ion at 3.0 s?

  In Fig. below, what is the average *y+, )mhunclmqfq6v8 acceleration from 0 to 5.0 s?

  In Fig. below, what is the ai+hbg7i taqeych5zbo/1 wx 6+gd0/ (t verage acceleration from 0 to 8.0 s?

  In Fig. below, what is the ./vdi)eyhx4qcj* ot7 u19up, oi; eve displacement from 0 to 8.0 s?

Does a car speedometer measurepgj)6aw/mit+d 1* o9 );4sovl c mshhw speed, velocity? {speed|velocity}

  An object can have a varying spa/-k 0 )jzyq9dxqo/r+ m /qinleed if its velocity is constant.

  The velocity of an object can be negative when its mdc , k;7 h:+*okb;m npf/kwtfacceleration is positive.

  If one object has a greater speed than a seck2wcx7;f .ll cond object, the first must have a grea; .2kcl7xwflc ter acceleration.

  Two cars emerge side by sidevlqx2 (j09su a from a tunnel. Car 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 acceleratiomdx rg q5u+x5 hw3b9lo09x7 cjn decreases.

  A baseball player hits a foul ball straight up intr v w./6z1hj8sscj: h /pari2zo the air. It leaves the bat with a speed .i6pzjsc: a/81 2vwhsrzj/hr 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, w5eob/7eb h5b0 vrvmn5 hat is happening to its acceleration, how does it change if air frme0re5o /bb vb7 55nvhiction is ignored?

  As a freely falling object speeds up, what is happening to its accelerati2c1h v.)vk3l7 zeoy jton, how does it change if c)vok2z1 .vhje lt3y7air friction CAN NOT be ignored?

  An object that is thrown vertically upward will return to its original zvo,v 6pdn;rs o5n09lwd89rb position with the sa9nr lvd 8zrwop509 dbnov6s ;,me speed as it had initially if air resistance is negligible. If air resistance is appreciable, how will this result be altered?

  An object can have zero velocity and nonzero acceleration at thejcsmr/ 8a 4a:0q;yg yh same time.

  An object can have nonzero velocity and zero acceleration at the same0*m;w kw stawewn .s+( 7rg2xl time.

  An elevator moving from the second floor to the fifth floor making no stops o mu2(-jxvnn4f1k 8icalon1 omuj vi8f2 n4-n(kxcg the way has zero acceleration all the time.

  A rolling ball moves fts. c1(jth6 xgrom $x_1=2.7 \mathrm{~cm}$ to $x_2=-7.1 \mathrm{~cm}$ during the time from $t_1=1.1 \mathrm{~s}$ to $t_2=5.3 \mathrm{~s}$. What is its average velocity?  (数值)  $cm/s$ (only fill in numerical value please)

  A particle at $t_1=-2.1 \mathrm{~s}$ is at $x_1=2.6 \mathrm{~cm}$ and at $t_2=4.2 \mathrm{~s}$ is at $x_2=7.7 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete laps around a quarterj6wz;s6v eqwyhhx+6ek58 yp +-mile ($1 \; mile = 1609 \; m$) track in a total time of 10.3 min. Calculate (a) the average speed  (数值)  $m/s$ and (b) the average velocity    $m/s$

  A horse canters away from itubjk rhgob o 9pjo-7i:l(p 3z,q)x *+as trainer in a straight line, moving 107 m away in 10.8 s. It then turns abruptly and gallops halfway back in 4.6 s. Calcul x: +alzh-)b,q*u9 (jo3gp ojbr7k oipate (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 froma4-bmmx50acd1jqo5kd xz sc3xe1i5, $10 \; m/s$ to $23 \; m/s$ 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 fro 6aj)dfav9f:+fcy +q-z f s.q-zebg9g m $16 \; m/s$ to rest in a distance of 64 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reach a speeds;xze-ycue ,/ko-5d d of $26 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $2.8 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinter can burst out of the blocks t.ll. qw /tgwy-p6arc.o essentially top speed about -ar/qct. lp.l6g.yww $11.0 \; m/s$ in the first 13.4 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 unif hgt8 1z :6hr8bywu barv,b7m7ormly from a speed of $20 \; m/s$ to rest in 5.95 s. How far did it travel in that time?  (数值)  $m$

  In coming to a stop, a car leaves skid marks 92s.rudci5 m ;7p m long on the highway. Assuming a dece; uim75drpc s.leration of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck goiev1rdl,,5 hrfgxc 1x:ng $25 \; m/s$ 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. Afterqi6 dmaco5 0syc *26lt exactly 27.0 min, there are still 1100 m to go. The y5m2 sl6icta *ocq 0d6runner must then accelerate at $0.20 \; m/s^2$ for how many seconds in order to achieve the desired time?    $s$