Suppose that an objec7c6zffr4*b ym t travels from one point in space to another. Make a comparison between the dis fmr7 4zfcyb*6placement and the distance traveled.

  When is the average velocity)j1lh 1x8oh:hrf f ,ha,e *mvf of an object equal to the instantaneous velocity?

  A new car manufacturer advertises that t-uas/w bi) grmjup1,6l2lu c; heir car can go "from zero to sixty in 8 s". This i/wb ,l gr;pi) auucjml1u-s26 s a description of

  An object moving in the +x axis experiences an accelera*/rdwvb:uyf vy6cb(3tion 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,5qh: i vrgwq yfjj-7; as it approaches a traffic light. Make a statement concerning y ;h,q7j gv-j5rf:w qiits acceleration.

  Suppose that a car traveling to the West (-x direction) begins0 tyw jact l4h.s.1w8e to slow down as it approaches a traffic light. Matle0w .y41taswh8. c jke a statement concerning its acceleration.

  Suppose that an object is moving wjr 9ss,am,o3-t+ ngodith a constant velocity. Make a statement concs +9m,tjo a-s,gn or3derning its acceleration.

  If the velocity of an object is zero, do0(,hlp mc vim*es it mean that the acceleration is zero? Support your answer with an exahv0,m m*(pilc mple.

  Can an object's velocity change direction when its acceleration isfa 0g*dspw1rbm79 +hr constant? Support your answer witha9sg+ p1*0r7 mdhrbwf an example.

  Suppose that an object/ l;gjccwhl:q- h03 gpr3x+vz is moving with constant acceleration. Make a statement 0l/h;pgh lc3-jvrqcw3+xg: z concerning its motion with respect to time.

  Can an object have increasi,na6 w9fgo v-bzu3 t; d5v4axzng speed while its acceleration is decreasing? Support your answer with an examptbw d g9 v4n-;xaov3fa5z 6,uzle.

  Suppose a can, after an initial kick, movese*pa-sr0vhy z+lr: n /jl0 z,y up along a smooth hill of ice. Make a statement concerning its +:r *la-zv/ 0z sp0nyhrejyl, acceleration.

  Under what condition is average velocity equal to the average of the )a kpy izd:-0e8j vto/object's initial and-d p:te8y/ajkv i 0)zo final velocity?

  Objects A and B both start at rest. They bothjl z *jk.(bj olvorj8( 86im*h accelerate at the same rate. However, object A accelerates for twice the time as object B. What is the final speed of object A compare*o(jh. jlizrbk(l m8o jv*8j6d to that of object B?

  Objects A and B both start from rest. They both accelerate at thevxr u+53.h fhg same rate. However, object A accelerates for twice the time as obgxhh 3 u+r5fv.ject B. What is the distance traveled by object A compared to that of object B?

  When an object is released from rest and falls in the abseqo-xeb b(z+gq2h z44kp i 0c f-f53gnwnce of friction, which of the following is true concerning its motion?g xpnqoqcbwk( 4i05+efz2-3 g fzh4b-

  When an object is released from rest and falls in the absence of friction, w htsa/7p(mawmv,pdj0h 9p a;e **qs cmit54o*hich of the following is true concernin*4 ecmatwpd7vh**a 0at9sh5 qm m/pj;si (p,og its motion?

  Suppose a ball is thrown straight up. Make a statement abo q8bhjwv3eho9t16sw bbc*s zrgn-y7y;e,m5 5ut the velocity and the acceleration when the ball reachesg b7w-y9s* ,b 5h5 1ctvesjnrhwb o63ym;q8ez the highest point.

  Suppose a ball is thrown straight up. What is its acceleratj0i3 vt1pc7gqion just before it reaches its highest pqc7 vpt31gj i0oint?

  Suppose a ball is thrown straight up, reaches a maximum height, then falls to o118 uati+zh qits initial height. Make a stat8z1+atq1 uohiement about the direction of the velocity and acceleration as the ball is going up.

  A ball is thrown straight up, reaches a maximm3yg;3gtqe+jq f1o) aum height, then falls to its initial height. Make a statement about the directio gjy 3gem;f+q13) aoqtn of the velocity and acceleration as the ball is coming down.

  Suppose a ball is thrown downward u0u22zz ugdpbqh8 n **in the absence of air resistance. Make a statement c *uzu0upn2dqz8h g b2*oncerning its acceleration.

  Suppose a skydiver jumps from a high-flying plane. What is her accelerati y0*7nzb*wx-ekle5m 5c 3i- bdn pgc)con when sheiz mbklc n5ny) xpw*g 3-cc5 -db0*7ee she reaches terminal velocity?

  A ball is thrown vertically upward with a speed v. An identical second ball is1is ixq(4cmeyb6z) tws+rr(wq m* :f6 thrown upward wqcr+6(:z1 qyx wismerwf )m(64 btis* ith 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. One s;-*)6r*mr- :njj zv uzkuzmj necond later, ball B is dropped from the same buildi;*r -uu*zm 6v n- jnj:)jrkmzzng. As time progresses, the distance between them

  Ball A is dropped from the top of a building. One s+2fyg/ b13s0 ojlrjic econd later, ball B is dropped from the same building. As time progresses, thj yi1 o0l f/b3rs+gjc2e difference in their speeds

  Two objects are thrown from the tov bt) 6e1ynjl0p of a tall building. One is thrown up, and the other is thrown down, both with the same initial speed e6 1nytv)0blj. What are their speeds when they hit the street?

  A brick is dropped from the top of a building. A second brick is thrown straighwf67 5vm c825nfykfrelc2gn*t down from the same building. They are released at the same time. Neglec2w6vf 25k ley frm7nnf85 cg*ct air resistance. Compare the accelerations of the two bricks.

  An object is moving with t,3+k9hfy y+fv8gwvv:b j c2xconstant non-zero velocity in the +x axis. The position versus k+:, 8bvt23y v 9 +whyfjfgvxctime graph of this object is

  An object is moving with constant non-zero acceleration in the +x axis. Tht4u jr sx5;a)le position versus time graph of this s5rxa4; t l)juobject is

  An object is moving with constant non-zero velocit-k d gbkj 0zy/95:cm uhj(emp:y in the +x axis. The velocity versus time graph of thiske/mkdj -b0hjc y::p( m5ug9z object is

  An object is moving with constaq;:jw fq4;s mhbxm0dt* :w 4yfnt non-zero acceleration in the +x axis. The velocity versus tid:b f0q;s h:w4m ;j tw4myqx*fme graph of this object is

  The slope of a position versus time70mx0l) qauw mqy5 zi/ graph gives

  The slope of a velocity versuw7w /ca.yc k).ta,ji- eqt7tss time graph gives

  The area under a curve in an acceleration ve*,c,a-mxz (dv if f;sorsus time graph gives

  The area under a curve in a velocity versus time graph give(ry1skn-1vyxt q4z :u /v5x6e l7idoes

  If the position versus time graph of t+us0;lfv8 mi up*;s pan object is a horizontal line, the object isiv* mlspuus+;f0pt ;8

  If the position versus time (/1uul0w ipqd graph of an object is a vertical line, the object is/d 10uqiwlp u(

  If the velocity versus time graph of an object is a horizontal line, the objecncmuikhs:p.uk ) ( y-6t i:kh.y ki suum)p6 n(c-s

  If the velocity versus time graph of d7s+ ba-d52pj1cpsv: 9 qz2 xpv4ds gdan object is a straight line making an angle jzp2p-da v2qg41b :vpdcx sss 9dd +75of 30 degrees with the time axis, the object is

  An object moves 15.0 m north and then 11.0 m south. Find both the di 3 qi8b:(k mdd mmdp o;d;fqi8+kgr0p.stance traveled and the magndpomkrfmm; . qi(ib0gk: 3;d88d dq+pitude of the displacement vector.

  A boat can move at 30 km/h in still water. How long wil qvb y)mf(um9bib/z7:l it take to move 12 km upstream in a bfb qu)z(b9i:mm7y /v river flowing 6.0 km/h?

  55 mi/h is how many m/s? (1 mi = +h.egn/smr) lk et6 p*1609 m)

  What must be your average speed in order to travel 350 km in ::rk oj1hw8 tgpa f 3zsuz0;-a5.15 h?

  A runner ran the marathon (approximately 42.0 km) in 2 hournke9r c+m2 ib4s and 57 min. What is tn429+ kcre bimhe average speed of the runner in m/s?

  A car travels 90 km/h. How long does it take for it to trav ug :ffg7r2)vda(/g -dtifzx7 el 400 km?

  A ly (light year) is the distance that light travels in on xtn2 +g6vi b-+i/ rosvs+vyn4e year. The speed of light is yovsvsb -gx iv+4r i2 n6/nt++$3.00 \times 10^8 \; m/s$. 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 the s,zfnx4 bqirz/(uwfo,j (2:z side for 4.0 s, how far do ysfzbw zi,rj2/,n(zq xo4u:f( ou travel during this inattentive period?

  If you run a complete loop aro6ur lfna g99a j4f*mqwn5hk:9 und an outdoor track (400 m), in 100 s, your avera rf*fm5jqu awnk4 6g99haln9 :ge velocity is

  A polar bear starts at the North Pole. It why)u z62pb4sm7 w 5n9;rcnybtravels 1.0 km south, then 1.0 km east, then 1.0 km4yrh5u69 s7bn2)wn z;y c bpmw north, 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. It travels 1.0bpz 9;pylg0 .b 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. zbg pl.0; 9ypb What was the bear's average velocity?

  You are driving home on a weekend from school at 55 mi/h for 110 miles. I /r4 ryszncu)/t then startss/ uyn/zr4r)c to snow and you slow to 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 ac h -u;qrini8,++p4j cq-0lcs8a 3lxft ow8o bt 100 km/h. What is the average speed of the motorist for this trip? 8pq-i tioxc8a c8w;jo-f3+4,+ bn uhlqsc0rl

  A motorist travels for 3.0 h at 80 km/h and 2.0 h at 100 km/h. What isbv vjm,t.m8lv0(y 7k7 s7f rtoa-1geg her average spee0rbv1v7av78lsjge .7my ok,-fgmt t (d for the trip?

  An airplane travels at 300 mi/h south for 2.00 h and then at 250 mi/,x.i3 hn ehy)oh north for 750 miles. What is the average speed for the trip?)i x,ne3. yhoh

  In a 400-m relay race the anchorman (the person who runs the last 100 m) for tz2n*xqil 8v 5ceam A can run 100 m in 9.8 s. His rival, the anchorman for team B, can cover 1*vcnilzx 2 5q800 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 comlaljs sr 1a7q-kiw)0/ es to a stop after 10 s. The car's average velocity during deceleration was 56 km/h. What was the car's d aw- 0) 7karqsl/j1ilseceleration while slowing down?

  An airplane increases 71wd5o3nyisk its speed from 100 m/s to 160 m/s, at the average rate of nyo17 ds53wki $15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h accelerates at the rate ofg/ph k:+dc6nuurir:a x7 -+yf $2.0 \; m/s^2$. How much time is required for the car to reach a speed of 90 km/h?

  A cart starts from rest and accelerates afcjmrz 427y ,-2t etput $4.0 \; m/s^2$ 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 spee:/enb9rr leou mb y6,*ds up with a constant acceleration of b lemeu*ry:/b6no r9,$2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial velocity of 6.3 m/s exper zp3p8h(0d ,z,t iyzdgiences a constant acceleration of izp 8th,d y,(30zgpzd $3.1 \; m/s^2$. What is the cart's displacement during the first 7.5 s of its motion?

  A bullet moving horizontally tojdr 49,wnpuqx : fwa(1 the right (+x direction) with a speed of 450 m/s strikes a sandbag and penetrates a distance of 92.17 cm. What is the average acceleratij1p4dwa qrfw(:ux9, non, in $m/s^2$, of the bullet?

  A jet fighter plane is launched from a catapult on an aircraft carrier. It reacv;tt 6* fb -)icxzyzm,hes a speed of 42 m/s at the end of the catapult, and this requires 2.0 s. Assuming the accelerati-m)6zy ix,tzt;v*b cfon is constant, what is the length of the catapult?

  A car starting from rest moves with constab+7b2 .zfzfmu nt 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 +hrg,d5f )bd cb:k )tef4:tae to 80 m/s in a distance of 200 m. What is its average acceleration gd)t:hf:+,k)4 fea 5debbctr?

  An object starts from r ybiskknopqeuc:;j 475cp019 est and undergoes uniform acceleration. During the first second it travels 5.8 m. How far will it :bces 951p7op; k 0qci4kyjuntravel during the third second?

  An object is moving in a straight line with constant atebisk;rq pt 9 5143 otxbuz.+cceleration. Initially it is traveling 3r41u+ et59 ;qtokixbb. zpts at 16 m/s. Three seconds later it is traveling at 10 m/s. How far does it move during this time?

  A car starts from rest and accelerates uniformly at b e.vs-+b u0xmfb n+i+$3.0 \; m/s^2$. 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 can decelerate at abojw7k f9 o43pgq6ctc+6 fe8y r 9reed6out $5.0 \; m/s^2$ 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 turnsbh(sm00 pb o,v green, a car that has been waiting at the intersection starts ahead with oh0bv ,mb (p0sa 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 the surface of planet X 1gjxm -t2;jykwhere the accelerati2mk1g-tj;xy jon 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 sepe:j*clfkl *0x*/x of 12 m/s on the surface of planet X where the acceleration due to glx0xce/*f** jk p :lseravity 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 oj79y4a,rvwm ln the surface of planet X where the acceleration due to gravity is4 l9y7j,vwmra $2.5 \; m/s^2$. 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 of pt3q zb-ejdvy7mhf 7*0 lanet X where the acceleration due to gravity 3f7bj*ed7 vqtm -z0yhis $3.5 \; m/s^2$. What is the speed of the object after 8.0 s?

  Human reaction time ifka(lg *) ois9s usually greater than 0.10 s. If your friend holds a ruler between y(k*)lf a o9isgour fingers and releases it without warning, how far can you expect the ruler to fall before you catch it?

  A ball is thrown upward at a:*ac1u 9kb2 l3dd q kypgetv84ip2kn . velocity of 19.6 m/s. What is its velocity after 34k 9uplctbi8.gp * 2yane:32kv dq1kd.00 s?

  A bullet shot straight7c9g1aqvu6 5k*inp-w lr,jc e up returns to its starting point in 18 s. What is the initial sjeqi9rw7n1au5l-,v c c6g*k ppeed of the bullet?

  A ball is thrown straight up with a speed of 36.0 m/s. How long does it take tlixtr :i1z/8ff px17v. jw2 aho return 1wz ap1j : il78tf/f2 x.hvixrto its starting point?

  A ball is thrown downward from the top of a building with an iniz 6 7l nuk3f7rowr:qp*tial speed of 14 7ok: w* 7urn 6lpr3zfqm/s. It strikes the ground after 6.4 s. How high is the building?

  A ball is thrown straight up with a sp(cx 6eqzc4 :uxeed of 30 m/s. (only fill in numerical valx 6uc(cq4 ze:xue 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 47.7 m/s. gtvsyb67 / .sjmqw0 x u087rzl(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 14 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 14.0 m above the point of contact a second time.  (数值)  $s$

  In Fig. below, what is the velocity at t = j /uk1m3rp ( b)l r3rn3nw-cnx1.0 s?

  In Fig. below, what is the velocity vy4t+o d l7 k9dkxwtm(f)/(uqat t = 2.5 s?

  In Fig. below, what is the velocity at t =: 3askq ulc9,c 4.0 s?

  In Fig. below, what is the velo/rbj) vw87sd 0z cg;;vfh*lq ycity at t = 5.5 s?

  In Fig. below, what is the average velocity from 0, c)z +hg2siox to 4.0 s?

  In Fig. below, what is the average velocity from 0 t k(pje oam-:y8o 6.0 s?

  In Fig. below, what is the acceleration abm)st/cbe/ ;.er,qiru- 1 loct 1.0 s?

  In Fig. below, what is the acceleration at 31 z kk)xtuc2/q.0 s?

  In Fig. below, what is the average acceleration y8hf2kr2u :tei:w t l1from 0 to 5.0 s?

  In Fig. below, what is the :.ip,o4c urhvaverage acceleration from 0 to 8.0 s?

  In Fig. below, what is the displacement from 0 to 8 * 4kxa1f1 j4sq6xt, cw7emrkj.0 s?

Does a car speedometer measure speed, velocity? 0,9i l t1za*edtudcqw4; t:om{speed|velocity}

  An object can have a varying speed if its nnninzeo e 9n13 5i vu42v07uovelocity is constant.

  The velocity of an object can be negative whe: +re j n0mcd/z2vwvs5vjq;gv6 ctw63n its acceleration is positive.

  If one object has a greater speed than aqpcxupk+ l)a8 +mv+5nhx t2t) second object, the first must have a grut hmk p)xnx )+qptcl+582 +aveater acceleration.

  Two cars emerge side by side from a tunnel. Car A is travelings-k/ z+0quvxe 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 accelod9sk rtlws)9l g3 qunk.x96(eration decreases.

  A baseball player hits a foul ball straight up into the air. It lxe:f0ci)1z wmeaves the bat with a sfz)ei0 wcmx1:peed 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,;4. r lsm(,+4 cefjqi )(ofkfbotjq 7g what is happening to its acceleration, how does it change ct4fi; s qk.rjb+4l7 (ffoom,j)egq( if air friction is ignored?

  As a freely falling object speeds up, wj)pez 86a.wbf81 cf0gqg:wdbu)7r p z hat is happening to its acceleration, how does it chaw1b)rf7z:.)u8bpcga6zjwg0 fd ep q 8 nge if air friction CAN NOT be ignored?

  An object that is thrown vertically upwan70zk q; ivagoa(*j h7rd will return to its original position with the same speed as iq7aa( *7;z knvh0jog 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 atlufh) 7 7xiv7blr ncsfv(7 dbqr) ,w-4 the same time.

  An object can have nonzero velocity a k5urd8let kq .;kh35gam f:7 klab0/xnd zero acceleration at the same time.

  An elevator moving from the second floor to the fifth flo-fr,9d mg- ;/ hdcfgtkor making no stops along the way har h gfgm-- /ftc9dk,;ds zero acceleration all the time.

  A rolling ball moves fromn.ab eqq3kx f. bs5f3 +7qr-sg $x_1=1.8 \mathrm{~cm}$ to $x_2=-8.0 \mathrm{~cm}$ during the time from $t_1=1.3 \mathrm{~s}$ 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 $t_1=-3.3 \mathrm{~s}$ is at $x_1=2.2 \mathrm{~cm}$ and at $t_2=3.5 \mathrm{~s}$ is at $x_2=7.9 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight +.obqwx 6pu,kwzo0f :.jg) g/7jrfte9c n+uzcomplete laps around a quarter-mile ($1 \; mile = 1609 \; m$) track in a total time of 11.7 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, moving 112 m )t.secz:u;d m away in 11.7 s. It then turns udzm: s;t.c)eabruptly and gallops halfway 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 from ez+xmh*7/h m e$11 \; m/s$ to $25 \; m/s$ in 4.4 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 from 5khrwbmbi ,q h((jy2*oi08bwk / ys3z $17 \; m/s$ to rest in a distance of 78 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must rea( ;tgrx rs 0r,f,z+4mc.mjq much a speed of $30 \; m/s$ 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 can burst out of the blocks to essentiallyi :r)tar+ ei.um7t51m:w gz yy top speed abourit 1+)aui ymwmg5ye ::t7r z.t $10.7 \; m/s$ in the first 14.3 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 c -jepa+h.l 4q ,c5s5dg.ddbtfrom a speed of $21 \; m/s$ to rest in 5.15 s. How far did it travel in that time?  (数值)  $m$

  In coming to a stop, a car leaves skid marks 50wa mx*kinx. 92 m long on the highway. Assuming aw n 05m*a.xixk deceleration of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truck goingo8 +xmq xs-0-ug5cfhy er ( djbu;64wv $25 \; m/s$ 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).    $m$