Suppose that an object travk ;smqj6 nti3+els from one point in space to another. Make a comparison between the displacement andtk 3+m 6sji;nq the distance traveled.

  When is the average velocity ht1rr qrrr8/ 5-)pqw/ uhnw5l of an object equal to the instantaneous velocity?

  A new car manufacturer advertises that their car can go "from zero tolm+5sti,zxb7.72ivvh z bui; sixty in 8 s". This is zibmuzv5i b2.7vsi, l7x;t+h a description of

  An object moving in hsrce 3*r mu61the +x axis experiences an acceleration of $2.0 \; m/s^2$. This means the object is

  Suppose that a car traveling to the East (+x direction) begins * l2gt(t4hk klhgmo/. to slow down as it approaches a traffic light. Make a statement concerning its accelk(mtt /hh4 *og.lk g2leration.

  Suppose that a car traveling to the West (-x directiony8.46db pyeif) begins to slow down as it approaches a traffic light. Make a statement concy4pfiydbe 86.erning its acceleration.

  Suppose that an object is moving with a constant 4gdrnwg)p 41 co ow,9b 5eje5evelocity. Make a statement concerning itsweb jpd 1r,5oe)co4 5g 4gwe9n acceleration.

  If the velocity of an object is zero, does it meap5:wf d2e,tban that the acceleration is zero? Support your answer with an example.ptf5 a2we: ,bd

  Can an object's velocity change direction when its acceleration is cv.gztjd 6g (/ionstant? Support your answer with an example.d (/gizg6vtj .

  Suppose that an objee3krw+pu- 0 cix8sqg2k 2 pon)ct is moving with constant acceleration. Make a statement concerning2 k+e)2g iqon-p0 8kcru 3sxwp its motion with respect to time.

  Can an object have increadyqb p d.ncztp 2*2v-atx(e*.sing speed while its acceleration is decreasing? Support y 2y*pq*d(abtdv. .p -xenz2tc our answer with an example.

  Suppose a can, after an initial kick, moves up along a smooth hill of ice. Make;afx2 (g sfu(af;v r4l a statr a(asf;l 24 ufvxfg(;ement concerning its acceleration.

  Under what condition is average velocity equal to the average of the object's ;:muzl +a9opwmel)5b: )vcaminitial and final velo la)b ) zpwmo9:uac;mv5eml :+city?

  Objects A and B both start at rest. They both accelerate j/ 3*+hv- .lirycshha at the same rate. However, object A accelerates for twice the time as object B. What is the final speed of a* s+hjl ch/r3.yv-ihobject A compared to that of object B?

  Objects A and B both start from rest. They both accelera 8e;srs6yvt 3 /iqc53mz 1gtvute at the same rate. However, object A accelerates zrucise8qt v6yv3gt s;/m351for 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 rest and falls in the absence 4o u*5,fos ar y*5 5ibtg eumm--rrg(xof friction, which of the following is true concerning its motion?gmy4, (imf 5 5u-ru-sob*tera*rgo5x

  When an object is released from rest and falls in the absence of uk.onh+) (2r7i zf ej67mwyxj friction, which of tiy. 6kj7nxjh u(o z7r)e+2mwfhe following is true concerning its motion?

  Suppose a ball is thrown str6+nke 9io- b(mioes j,aight up. Make a statement about the velocity and the acceleration when the ball reaseb 69 m+kj(i-,onoe iches the highest point.

  Suppose a ball is thrown straight up. W bq+jc f3; (xxx1auxs0hat is its acceleration just before it reaches its highestxbfxq s;au( 30x j+1xc point?

  Suppose a ball is thrown straight up, reaches a maximum height, then falls to x(pem( -vyk3dco7pt +its initial height. Make a statement about the direction of the velocity and acceleration as the bal-m37+ptde kx(vo cp y(l is going up.

  A ball is thrown straight up, reaches a maximum height( v9g kcb/6vo. )-bw .l,jd+wnjrffb x, then falls to its initial height. Make a statement about the direction of the velocity and acckvwroffb.( 6.vwj-gjb/l9d xn +,c)b eleration as the ball is coming down.

  Suppose a ball is thrown downward in the absence of qw3fdsfu* ;2ti /soh8 4lbr(a air resistance. Make a statement concerning its acceleration.so2ffu /a8t ibw(*hds4 l; rq3

  Suppose a skydiver jumps from a high-flyb oohi81/*5vz vwb ;zling plane. What is her acceleration when she she reaches terbi*o581o w ;bl/zvh vzminal velocity?

  A ball is thrown vertically upward with a +zj:3.a-aa3 vde5scsdbq/ pl * ol*se 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 oe s- p/.s cddjv3l3e:slzaaaq*+ 5*bto 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 buildintcjfo;,u be86 g. One second later, ball B is dropped from the same building. As time progresses, the dista8b;, ote j6ucfnce between them

  Ball A is dropped from the top of a buildip66fpcf-qw; u mpld)3 ng. One second later, ball B is dropped from the same building. As m3pwp-6f; fcq)6 uldp time progresses, the difference in their speeds

  Two objects are thrown from the t;f3szmo 0*wu eutwbhp 51qs ;5 wo18mxn4.cvbop of a tall building. One is thrown up, and the other is thrown down, both with the same initial speed. What are their speeds when they hit the so ;t53ewo*b wmv p1b84xf51;hs wzuq.mnc 0 sutreet?

  A brick is dropped from the top of a building. A second brk 8tr*wwagx (e+5e8((rhzp14bog ro m ick is thrown straight h(pgz4mo 5egab(8 (okwrrw1*ex +r8tdown from the same building. They are released at the same time. Neglect air resistance. Compare the accelerations of the two bricks.

  An object is moving with constant non-zero velocity ikdj9rkv4 2/o zq e/646vovp drn the +x axis. The position versus time graph of this objvjk6r/ 9qv od4e4r2povdzk 6/ect is

  An object is moving with constant non-z1),m mkwypgtvq:q(k/ e*dh 6jero acceleration in the +x axis. The position versuspqd(k6ym,hqw*kmevjg:/ ) t1 time graph of this object is

  An object is moving with constant non-zero velocity in the +x ax/a 0vbet6j*, a8o ;kk qv+htkrgy7hm9is. The velocity versus time graph of th tgekvkq 0ba,9j+va7/ ;6*rothhy 8mkis object is

  An object is moving with constant nog;-ni y (pt()ou fe4lzn-zero acceleration in the +x axis. The velocity versus time graph of this g(-efz4 on;)lp ui(y tobject is

  The slope of a position versus time grak7l + k8-mn5sw-* vgx ch4-yy,ib/xh0dw bw dmph gives

  The slope of a velocity ve3(mlj.iyjx dklgx9jxo3* d . 9rsus time graph gives

  The area under a curve in an acceleration versus time graph givguaz nr u*q1k8w(z xqo*q90-des

  The area under a curvzr8 cp xv0b,2qe in a velocity versus time graph gives

  If the position versus time graph of an object is a horizontal line-271z,9 lxz cyfn (4 xd2bf w2atoxouw, the object itoo ux7 x2zal,9fbw1(f4 y2 wd2-zx ncs

  If the position versus time graph of an object is a vertical line, tprst-97 la kr0z4pv v.he object ispr tv7razk. v04p-s l9

  If the velocity versus time graph of an object iw3r+j c 7hu7qvc-u+ fgs a horizontal line, the object -rghjcvcwqu7u3+7f + is

  If the velocity versusk 2p5 uu,i+uvw*x: qwe time graph of an object is a straight line making an angle of 30 degrees with the timeu+ u5p w,euqv 2ikx*:w axis, the object is

  An object moves 15.0 m north and then 11.0 m south. k 0 mm -tu:s36/:stp tfmjk*yxFind both the distance traveled and the magnitude of thekk -y:mm jm ts:6t0 /x*ts3pfu displacement vector.

  A boat can move at 30 km/h in still water. How9csle)ns +w,dbifi6f/zk51l long will it take to move 12 km upstream in a river flowing + 5 e6kz,sliibcw1/ nf)sd9lf6.0 km/h?

  55 mi/h is how many m/s? (1 mv4c)uise5q7-wn7+mfl4+2a jmhe ure i = 1609 m)

  What must be your average speed in order to travel 350 km g 0c(g8ydlpm50qn0 bpin 5.15 h?

  A runner ran the marathon (approximately mqf3 jp6 ab:c442.0 km) in 2 hours and 57 min. What is the average speed of th 6ja4qc3mf :bpe runner in m/s?

  A car travels 90 km/h. How long does it take for it to t ) j(,ri+c-x4c ghlytqravel 400 km?

  A ly (light year) is the distance that light travels in one year. The sps ,zb 96wpdi*peed of liiw*s,p 6 bz9pdght 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 you look to the side for 4.4ra9;b a wjm4p0 s, how far do yojaa49;rb pw m4u travel during this inattentive period?

  If you run a complete loop around an outdoor track (400 m), in 100 s7 y l(t0fmbit.l1y4sl , your average velly y17i.lbtm(l4 tfs0 ocity is

  A polar bear starts at the North Pole. It travels 1.0 km south, then 1.0 j/ 2w96 lj a5.qcwnh bvl/g/sukm east, then 1.0 km north, then 1.0 km west to return to its starting poin9 qnscl./lv5wjh u6/b aj gw/2t. This trip takes 45 min. What was the bear's average speed?

  A polar bear starts at the North Pole. It travels 1.0 km south, thenq9 lfd5f 4nczu98qf 3e/2xej obser)+ 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 velocit83enqfojq s)u+lffxre9 z c4/d52e9b y?

  You are driving home ) kb/m/*:xpuomd(w qhc8j 2aw c)uz:h on a weekend 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 hours and 15 minutes. Hao)*(wxu8h)/ccmh2u: /wm: pb j dqz kow far is your hometown from school?

  A motorist travels 160 km at 80 km/h and 162d4rd*uuiq m s4u c:6o0 km at 100 km/h. What is the average speed of the motorist for this tr 2s4crq6o didu :4m*uuip?

  A motorist travels for 3.0 h at 80 km/h and 2.0 h at 100 kyz0/v)pt k 5avm/h. What is her average speed 5pv ak yt/v0)zfor the trip?

  An airplane travels at 300 mi/h south w11cbddg6v wxc ux1*7for 2.00 h and then at 250 mi/h north for 750 miles. What is the average speedx 6 cg*wcv1d1wbud71x for the trip?

  In a 400-m relay race theg j; bu59q,:d6ozivqc vg)ef1 anchorman (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 team A runzd1ve9u)ci6g qfvgqo:5j,; b ner not lose the race?

  A car decelerates uniformly and comes to a stop after 12 s. Th6fr udlt ai0jg88 w0,je car's average velocity during deceleration was 33al, 0jgrj8f t 6w8u0di km/h. What was the car's deceleration while slowing down?

  An airplane increases its speed from qqwyj.tw / i3-mu65ge 100 m/s to 160 m/s, at the average rate of u/65 emgiwwtq qjy .3-$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/ ) eer.cb335wiaycyx xe.74 kxz63uceh 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 resf zedhiv6;vqd/r a;9y 30fpb1t 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 constag bl yo65m+k (fmfy:9rnt acceleration of ymf5+byl o(6r9kg m: f$2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial vel2hd ww(f0j8 )9zwq tgaocity of 2.2 m/s experiences a constant acceleration of 2q) 8zwadw(wg ht0fj9$2.9 \; m/s^2$. What is the cart's displacement during the first 9.6 s of its motion?

  A bullet moving horizontally to the right (+x direction) with(vxg9 07qr b,l5hbm )tv upzl. a speed of 201 m/s strikes a sandbag and penetrates a distance of 91.96 cm. What is the average acceleration, iu9()llz. h7t,m qbgvv b0prx5n $m/s^2$, of the bullet?

  A jet fighter plane is launched fro.aresj*ni -x- isnc hulxc75,9p +j,ym a catapult on an aircraft carrier. It reaches a speed of 42 m/s at the end of the catapult, and thisj*px,.9sn- ys- ccn7 ,xi+laiujh 5r e requires 2.0 s. Assuming the acceleration is constant, what is the length of the catapult?

  A car starting from rest moves w0su6i0)hf bdgh lf,tf+nj r/:x 5 li(fith 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 200eh negq9h 8vo6f6 sxv*0kqd, ( m. What is its average acceleratf *nsd (kgq8h v06q,xh96oev eion?

  An object starts from rest and undergoes unifor 1x h(7 1qoik mq* riwj)3a6oa4rb;ymnm acceleration. During the first second it travels 8.3 m. How far will it travel during a6 o1 xi4;7b( )kimn3mrhy rawojq1*qthe third second?

  An object is moving in a sd1(3ho iyedf* traight line with constant acceleration. Initially it is traveling at 16 m/s. Three seconds later it is traveling at 10 m/s. Ho 3 i*yfe(ddo1hw far does it move during this time?

  A car starts from rest and accelerates uniformly at 9-wyn)m ujfz1i y8l. p$3.0 \; m/s^2$. 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 iyqtefk3g2 zijx e. y6w3a,5: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 ca 1bwe1 y3bdkk vtn(n6drb9d0u-(3 jq ar that has been waiting at the intersection starts ahead with a consta-1ukny1d jbkn9tdr0 (w3bda( eqv3b 6 nt 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 2ptw 4uys qyh8.)jf g5 mxr74km/s on the surface of planet X wheuq7y g 4xj r)2ypw4hk.st8fm5re the acceleration due to gravity is $1.5 \; m/s^2$. What is the maximum height reached by the object?

  An object is thrown upwardd2x 2k)c)/cnfovp ul qjwe evx61)4j) with a speed of 12 m/s on the surface of planet X where the acceleration due top j1ec6du)nxw )v4l/cfxvqek)2) 2jo 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 s 0y 0xx+ w7eb52sbfg2mcg2quq peed of 15 m/s on the surface of planet X where the acceleration due t2w2cq2+m y guebx70b q0 5sxfgo 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 s6u*dl6kdv -o gpeed of 14 m/s on the surface of planet X where the acceleration d u6g*o-6vdkdl ue to gravity is $3.5 \; m/s^2$. What is the speed of the object after 8.0 s?

  Human reaction time isylws 1yb)c-4+kp- 3io4qpd eq usually greater than 0.10 s. If your friend holds a ruler between your fingers and releases it without warning,b +1-q -p43yc swdy)4pioeqkl how 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 is its vel7jk2dtp /2bgk ocity after 3.00 s?/gk2 7j tdbk2p

  A bullet shot straight up returns to its starwgkzp ,: 9,dufi,+ld vting point in 7 s. What is the init k : dp+z,w,f9dugi,vlial speed of the bullet?

  A ball is thrown straight up with a speed of 36.0 m/s. How long does kwnk64n 1cz/:zp / mztx5omt5 it take to return to itoc1/zntp6mkn5mzt54wk x/ z: s starting point?

  A ball is thrown downward fbo f-t se-p78drom the top of a building with an initial speed of 28 m/s. It strikes the gd p-7-osbtf 8eround after 2.1 s. How high is the building?

  A ball is thrown straight up with a speed of 30 m/,vdf *xwq di7:ehk:2 1r6jxfhs. (only fill in numerical value in thx,f17qhj: e :dxd2r vifw *6hke 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 45.2 mc8h l7,) ;fjoapnff/t/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 is the vosqnj wt4(b up85ah (8elocity at t = 1.0 s?

  In Fig. below, what is the c79eqj p* -n/ pyx/hwevelocity at t = 2.5 s?

  In Fig. below, what is the velocg5s88s ybcpyoti+5h lli5f( om -,i o.ity at t = 4.0 s?

  In Fig. below, what is the velocity at t = ,4 qe0ukpbp z9n0w(ran*l o25lo*fav5.5 s?

  In Fig. below, what is the average velocity from 0 to nni z3 y o6,d2gv8gj:p4.0 s?

  In Fig. below, what is the average velocity from 0 to 6.w( m,*(hl1r /omgczrs0 s?

  In Fig. below, what is the acceleration at 1.efg m*) v.4xax0 s?

  In Fig. below, what is the acceleratip fac8as ,r.v um.05nyon at 3.0 s?

  In Fig. below, what is the average av6n 7wou+19lxdc h)eo cceleration from 0 to 5.0 s?

  In Fig. below, what is the average acceleration nk: 6jm ybnmx)k( 8*vmfrom 0 to 8.0 s?

  In Fig. below, what is the displacement fro-ht74suwsnca,h 3 bxj(t)g n:m 0 to 8.0 s?

Does a car speedometer measure speed, velocity? {speed|ver * aay8rcb+6qjp6 he-locity}

  An object can have a varying speed if its velocity isgdua,h47b:7 yge6mp;c otv7u constant.

  The velocity of an object can be negative when its accelerati7u xvq h;o9v3(lp9ok mon is positive.

  If one object has a greater speed than a second 6 -dwze-msvs-object, the first must have a greater acceleratse6-ds m v--zwion.

  Two cars emerge side by side from a tunnel. Car A is t :0mosdysi2+nmew 9+kraveling 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 acce5y z f d6m4e2qe:)8 t0bgj3 wzydxhsz.po)0ysleration decreases.

  A baseball player hits a foul ball straight up into the air. It leaves the bat83pw8lj(uov q wiowv(8qp3l8 uj th 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 happening to i*9z8wk /j j rfr8;xzmkts acceleration, how9 mk/8*;8r k zjwzfxrj does it change if air friction is ignored?

  As a freely falling object speeds up, what is ek9z2 4.;h3 efk ss.btorhyeb6ae75q happening to its acceleration, how does it ckfrhe3 btszee.69hqsko2abe; 75 4. yhange if air friction CAN NOT be ignored?

  An object that is thrown a7 qis8gm40 bwvertically upward will return to its original position with the same speed as it had initially if air resistance is negligible. If air resistance is appreciable, how will this resgi4q 8s a0wbm7ult be altered?

  An object can have zero velocity and nonzero acceleratir c) yogp4 +cf6l,6vry4kfk4non at the same time.

  An object can have nonzero velocity and zero acceleration at the same tim lqknnf) ,z0 xkm6:mp1e.

  An elevator moving from the second flove 6+ hwwq w)w 1yits3)tuyuv6px4 5m0or to the fifth floor making no stops along the way has zero acceleration asy356hq0twwwti4ym1 v +uuew 6xp) v)ll the time.

  A rolling ball moves fromt+ru)muc( t6j $x_1=2.4 \mathrm{~cm}$ to $x_2=-4.6 \mathrm{~cm}$ during the time from $t_1=3.0 \mathrm{~s}$ 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 $t_1=-2.8 \mathrm{~s}$ is at $x_1=2.0 \mathrm{~cm}$ and at $t_2=3.0 \mathrm{~s}$ is at $x_2=7.3 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete laps around a quarter-miltrxf t+e4h5x -e ($1 \; mile = 1609 \; m$) 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 ih lg(n)jw 8mzot97r;m ts trainer in a straight line, moving 109 m away in 13.6 s. It then turns abruptly and gallops halfway back in 4.7 s. C)h8 o jn(rw;gml7mz9talculate (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 jcl+q,0u/l jbfyma m.s2 (x26rp pwcu d3.g8v $12 \; m/s$ to $22 \; m/s$ in 5.1 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 frompry7/ 1*mff :x8vbfb j $17 \; m/s$ to rest in a distance of 84 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reqt*(ad txglz g8*i( k5ach a speed of $27 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $2.6 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinter can burst out of the tb18i+ cm72n 3 nealphblocks to essentially top speed about i7h1mb p 2en nc+8tal3$10.3 \; m/s$ in the first 10.5 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 2d* 5iqmqbt . .d;qcuozl-+bhfrom a speed of $17 \; m/s$ to rest in 5.61 s. How far did it travel in that time?  (数值)  $m$

  In coming to a stop, a car leaves skid ma(bz4.8 dy7cduaa jr)prks 92 m long on the highway. Assuming uj ab. d87rdzc) 4pya(a deceleration of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a trucn6oijzb 8qt4-k going $25 \; m/s$ 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 compl/ yxah0dmp9z6eu:tba. qwp1 0 ete the 10,000-m run in less than 30.0 min. After exactly 27.0 min, t a0ht/mbq6xpw9:p0deu.1 y z ahere are still 1100 m to go. The runner must then accelerate at $0.20 \; m/s^2$ for how many seconds in order to achieve the desired time?    $s$