Suppose that an object 2fop d-rjkk9s0obj, +rhid q6a1l8f)kfg. 2ytravels from one point in space to another. Make a comparison between the -+h9adlj6k 0) kf2 ky2foqb. d p1i8ofr,rjgsdisplacement and the distance traveled.

  When is the average velocity of an object equal to the i f) q ;l76de0hpbd dn5t/shrq5m8va*instantaneous velocity?

  A new car manufacturer advertises that their car can go "from zero to vaefjo,y1ld ./+i1r j sixty in 8 s". This is a desc1rlf, j/1 aovj.dyie+ription of

  An object moving in the +x axis experience,)rfl3cijy9 snjv l 3/b ms2;ws 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*yu(r+0hf06ou rjcze*3ry cq s it approaches a traffic light. Make a statement concerning its acceleratir*f+uc qzy3 oj*6he 00 r(ryucon.

  Suppose that a car traveling to the West (-x direction) begi rn .av2jpdq-hss *)4sns to slow down as it approaches a traffic light. Make a statement concerning -) apq2hv d sjr4*.snsits acceleration.

  Suppose that an object is moving with a const m)xh4tfrr8 jspwg*)d5bzn*5ant velocity. Make a statement concerning x8r*nhj m5sd5rf)p*4 bzgtw) its acceleration.

  If the velocity of an object is zer .x ;fcll adx2y:c)s3yo, does it mean that the acceleration is zero? Support your answer with an exac3 yxld.x;)af:cl y s2mple.

  Can an object's velocity change direction when its acceleration is const6 xgghhzsk .80ant? Support your answer with an example.zhh68k0gxsg.

  Suppose that an object is moving with constant acceleration. ctmw i4 05m,+v(jtiju0;zja a Make a statement concerning its motio j,ua05zwm0cm +v itai(;4 jjtn with respect to time.

  Can an object have increasing speed while its acceleration is decrean cz4 q9lh*2wtd(n- fqk, oraox 52.zzsing? Support your answer with an examp,xnq.owhr(a2 4 5kqzl* t29zo-dcnfzle.

  Suppose a can, after an initial kick, m3)cbc ,l 5afggoves up along a smooth hill of ice. Make a statement3a,l)gfgc c5b concerning its acceleration.

  Under what condition is average velocity equal to the average of thep9 sd+bt,cn v 3e)2fpspm+ dx )h:rpo* object's inst ohe:+cdm3) pv9pds) pfnx *2b,+rpitial and final velocity?

  Objects A and B both start at rest. They both accelerm6iszfb:i* djoa*21j0c. zvh ate at the same rate. However, object A accelerates for twice the t* od jc0bz1 jzv fhaisi62m.:*ime 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)+gn re,tii d2. They both accelerate at the same rate. However, object A accelerates for twicrid )ei2, g+tne 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 rty4ng0 ae.,bc est and falls in the absence of friction, which of the following is true concern4.nbaec, yt0ging its motion?

  When an object is released from rest and falls in the absenc*6 v/euc5oy ch-mdah r*e(u eg7-wii4e of friction, which of the following is true co*oc v46/yedig5u* (ewmai rhu7e--hc ncerning its motion?

  Suppose a ball is thrown straight upaaiiv,o9nnht*qdro 9i o,875n 8xg5z. Make a statement about the velocity and the acceleration 9qgnin* 85oaa,xo9 zitv7dh8no5r,i when the ball reaches the highest point.

  Suppose a ball is thrown straight up. What is its acb ppsx24: w4kf c l.s(;0uza6hbu2thbceleration just before it reaches its hig z ak4.2us ux p: tb(;chsh026wbb4lpfhest point?

  Suppose a ball is throw4q wz yd:.3,pyi* xfqvn straight up, reaches a maximum height, then falls to its initiapfwx4,yv dzi*.3 qqy: l height. 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 * ad0p mqqu(a+wn (*a4b7n4bykzvu l7, then falls to its initial height. Make a7+nabldkqpz44w 7b uaq va0u (nm*(y* statement about the direction of the velocity and acceleration as the ball is coming down.

  Suppose a ball is thrown downwarf rbtcv.07 plz.qw ,7ed in the absence of air resistance. Make a statement conce0. q .7fz7cbtvrl,wp erning its acceleration.

  Suppose a skydiver jumps from a high-flying ;* j7gevs o5dm8a- :;fjarrlgov47l+/ylcq q plane. What is her acceleration whevjf q camoeogrr*d-4:78+ v; ;l7ylqa/slj 5gn she she reaches terminal velocity?

  A ball is thrown vertically u o y(k.tq8 7afzkc1m7;) pbanypward with a speed v. An identical second ball is thrown upward with a ;)by n7a y(pmkok8 .fzq1atc 7speed 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 second lai z(q)c 1rukpyo)j q58hae,5iw(4v wwter, ball B is dropped from the same building. As time progresses, the distance i 5(q4 q))a1w(iou8w zrhkpwj,cy5 ve between them

  Ball A is dropped from the toi a5emm9h ac8wr.mf3* p of a building. One second later, ball B is dropped from the same builw. rh*m mc85 aafiem39ding. As time progresses, the difference in their speeds

  Two objects are thrown from the top of a tall buildin*hii1cs(z(3h)z mc s8 r c.pvng. One is thrown up, and the other is ti38)vhc z(src.mz *i(p1ch n shrown down, 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 thrown straigoi:ao,f-5 dd oht d:doaof 5do -,iown 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 veloc+ts,uu xdn1l/h 9rn0city in the +x axis. The position versus tims0x /,dl+u t9hcu1rnn e graph of this object is

  An object is moving with constant nod/os:ria3i *l n-zero acceleration in the +x axis. The positi/r adii*s 3l:oon versus time graph of this object is

  An object is moving with constant non-zero velocity inchx4 ,6))hrzx6xwlpkt z7 / eia4+bbz the +x axis. The velocity versus time xl) 4 6zk)+hh,i4rezwpx6a/ 7bt zcbxgraph of this object is

  An object is moving with constant non-zero acceleratiz6jx fb 3 jv(xhe/v6h:on in the +x axis. The velocity versus time grh(3zjbx:xejvv hf/ 66aph of this object is

  The slope of a position versus ti)y n4hp0c3y xkme graph gives

  The slope of a velocity versus time grapskva(vsne2+3 * aq5 e (mgk8tlh gives

  The area under a curve in an acceleration versus time graph givr5w1lofuxv42 b5 )k ynes

  The area under a curve in a velocity versus time graph 7(jzp 7pop8 ufgives

  If the position versus time7:oasg l:ecw b + vn0mf+8rux7 graph of an object is a horizontal line, the object iso: 8c muv:+7bfwxgsr7+lnae 0

  If the position versus time graph of an object isp-)ru(s5 nc*zw dofy+xv(h5o a vertical line, the object ispuz5(do5 fvn-* y+)xh( or scw

  If the velocity versus time graph of an object is a horizontal line, the4zmm- .u/gk/ag )msz26 wj wmn object g 4 suzgm/wm.6w)mm -za /2kjnis

  If the velocity versus time graph of an object is a straight line7tv;ld:kuu *l making an angle of 30 degrees with thel:t u u7ld;*kv time axis, the object is

  An object moves 15.0 m north and then 11.0 m south. Fioi(m.vp* -la m2lu potw23cu5nd both the distance traveled and the magnitude of the displuvam2.lpm3c oo5t* (pi2w u-lacement vector.

  A boat can move at 30 km/h in still water. How long will it take to meamwjp+ z *f(/ove 12 km upstream in a river fp+(jaez w/* mflowing 6.0 km/h?

  55 mi/h is how many m/s? (1 mi xv:1n 9c 34ick2lpgbu 9h cg)3)6dyus0 nstij = 1609 m)

  What must be your average speed in order to travel 350 1 qu9zg tvzq6)gvpqar6j3 m e16,kka +km in 5.15 h?

  A runner ran the marathon (approximately 42.0 ry0ds5; 2pw/ vdojun2d 5)oaakm) in 2 hours and 57 min. What is the average speed o ;5w o)u/jadvsoyar5p20n d2 df the runner in m/s?

  A car travels 90 km/h. How long does it take for it to travel 400 km?jsu5lv gnrwcx/0be.ka ocjmxj e *7s:,u +(67

  A ly (light year) is the distance that light tu*:n5my m5 ))tug w6i+z onosvravels in one year. The speed of ligm m*u o s5n:uvo)+yz 5nit6)gwht 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 straik nhec )us;7d0ght road and you look to the side for 4.0 s, how fa7kn) ;eh0dusc r do you travel during this inattentive period?

  If you run a complete loop around an outdoor track (400 m), in 100 in3aqpgsw;2 * xpaif9k8 w zc3k2i)6os, your avera3k fs )z2;gaqoxki ni62 w3w9a8c *pipge velocity is

  A polar bear starts at the North Pole. It jkiicjje3 0r1j -u0 /qyt1 w:5q0 y q.zvfsd2qtravels 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 tqqik5jfy00d0-j e jrt32:cs. q1iwz q j v/yu1he bear's average speed?

  A polar bear starts at the North Pole. It travels 1.0 km south, then s o*z3:l*kwmc4:ybry 1.0 km east, thenwlsoz: cm*34 k r*y:by 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 velocity?

  You are driving home on a weekend from school at 55 mi/h fof9+hbjji( z--6xyd ds r 110 miles. It then starts to snow and you slow to 35 mi/h. You arrive h6j(-fd h i bj9d-yxz+some 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 the av:aafk4x k7qi s;m5u) uerage speed of the motorist for this)ufk m :7 kaq;is5u4ax trip?

  A motorist travels for 3.0 h at 80 km/h and 2.0 h at 10 zsrm7cf +h+6m0 km/h. What is her average speed for tcs+m+r6 fh m7zhe trip?

  An airplane travels at 300 mi/h south for 2.00 h and then at 250 mi/h nk hz *k2u5:ft4mv)yd zorth for 750 miles. What is the average shud*ytv4z2k fmk z)5: peed for the trip?

  In a 400-m relay race the anchr:a,9qqkw.pdwcii37-trx* q orman (the person who runs the last 100 m) for team A can run 100 m in 9.8 s. His rival, the ancho xctk9.7dq :wq-wqr *r3pi,ia rman 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 stop after 12 s. The car's average vqq4*,vrmyn -l xssefz)d.5:eelocity during deceleration was 47 km/h. What was the car'f. vyz*seq:sd4l x)enqm -5r, s deceleration while slowing down?

  An airplane increases its speed from 100 m/s to 160 m/s, at the a,v-,k ctytu(j verage rate of t-kyuv(tc,, j$15 \; m/s^2$. How much time does it take for the complete increase in speed?

  A car traveling 60 km/h accelerates at a p1:copcak.p(od3 xg:r ,dwud q()n3the 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 rest and accelerat.f; i:um lph(mes 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 aekntnmq1nubje-.zvy ,/5 e,e*jd7 +ncceleration omqe-jn n 1d kt5,e. ,/z*b+ee njyvn7uf $2.0 \; m/s^2$ for 15 s. At the end of this time, what is its velocity?

  A cart with an initial velocity of 4.5 m/s experiences a c opg)qn-bl /r:kd:by /onstant acceleration o/d-)nl/ryk :boqb p:gf $1.0 \; m/s^2$. What is the cart's displacement during the first 9.0 s of its motion?

  A bullet moving horizontally to the right (+x direction) with8)0bq , c;psw2tp xgj8 t(ziev a speed of 397 m/s strikes a sandba, 8i(0psbzq)ttcw8ev pj 2;xg g and penetrates a distance of 57.77 cm. What is the average acceleration, in $m/s^2$, of the bullet?

  A jet fighter plane is launched from a catapult on an aircraft carrier. pi( dk40 qhsjj8ws.irlw:5 t+ It reaches a speed of 42 m/s at the enpjiswl qshwji 5(+d40:rk. t8d of the catapult, and this requires 2.0 s. Assuming the acceleration is constant, what is the length of the catapult?

  A car starting from rest movwicbji kc0;*(q. r 8mm96u bxfes 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; 6dndokrw0 /u m/s in a distance of 200 m. What is its average acckdu ndro60/; weleration?

  An object starts from rerafcxp- l2+kj8uid6zn8o3r- st and undergoes uniform acceleration. During the first second it travels dx38k 8u n rzfi2 6cr+l-aopj-7.7 m. How far will it travel during the third second?

  An object is moving in a straight line with constant acceleratioy2 7 mcv4h,vkyn. Initially it is traveling at 16 m/s. k,c427hvymvyThree seconds later it is traveling at 10 m/s. How far does it move during this time?

  A car starts from rest and acch3jt;*ewr /m a6bpgls2k4;h nelerates 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 b0km /cptql- r (1z7ryon 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 traffic lip ww6 r2,wcy2 2fkbu6p8gjxv4vy ae6, ght turns green, a car that has been waiting at the interb 6u 6cwyw fr,g,8 j k2xvapeyp224v6wsection 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 of 12 m/s on the surfacep.:i)q( xrz7ngkv 8 w:ao3kou of planet X where the acceleration dueg uq8akp)vzn7 o o(wi3k.r::x 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 su 26ht/mwah/o vrface of planet X where the acv2wo//ht mh6aceleration due 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 surface of wjk33dl m5 )zwdl4(kfplanet X where the acceld4m )k ldz3f jk(w5lw3eration 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 upw56oy2vhp-;ukbvr fmgr, )b 7jard with a speed of 14 m/s on the surface of planet X where the acceleratiovrm g, o2ru 6b7;kf5ybpjvh-) n due to gravity is $3.5 \; m/s^2$. What is the speed of the object after 8.0 s?

  Human reaction time is usuea eq, 6*y8fqie967qa5bohfyally greater than 0.10 s. If your friend holds a ruler between your fingers and releases it without waqy a , i6eef9b8 6fh7e*o5yaqqrning, 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 kbt:- ca)niw )its velocity after 3.0)a-w:b t nc)ki0 s?

  A bullet shot straight up retmcn+biat0jd5 3b15z;u x8dw zurns to its starting point in 12 s. What is the initial speed of the bullixtjn0mdz +1cwu5b3b; 58 zda et?

  A ball is thrown straight zzdhja (31ps9up with a speed of 36.0 m/s. How long does it take to rjdhs91a (pz3zeturn to its starting point?

  A ball is thrown downward from the top of a building with an initial dbb (lhx,t+g7 speed of 14 m/s. It strikes the ground after 4.1 s. b+lg 7bht(xd, How high is the building?

  A ball is thrown straight up wspwi xgur0*rzx3 v*;0ith a speed of 30 m/s. (only fill in numerical value ins 0irpg* ;vu *w03zxxr 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 withr3(8v ,bhcz3q* es :sb)ocpog a speed of 44.4 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 2 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 i/( ih9:dawg1an mlw p8s the velocity at t = 1.0 s?

  In Fig. below, what iwcdjmk v2n3ks)3k2:l s the velocity at t = 2.5 s?

  In Fig. below, what is the velocwduqk8yyq65cxt )m a8a,7*b,-gee yby 2plf, ity at t = 4.0 s?

  In Fig. below, what is theyymx i7h fp wc:;rnrt1.9)t dm:,pm/f velocity at t = 5.5 s?

  In Fig. below, what is the avq6;9fuv a))hdw ue 3japps37c y9 7lkwerage velocity from 0 to 4.0 s?

  In Fig. below, what is the average velocity fr)t4ru8evuzy8,0+,cfobqv ) my o rl8eom 0 to 6.0 s?

  In Fig. below, what ircs*ih :yx 09e;ag 0tzs the acceleration at 1.0 s?

  In Fig. below, what is thedb ea:c38ub pv..obh8 acceleration at 3.0 s?

  In Fig. below, what is the averag:6.8amtfrpw oe acceleration from 0 to 5.0 s?

  In Fig. below, what is the average acceleration xlvgw tpy t/-6/hcd(6a,m,rd from 0 to 8.0 s?

  In Fig. below, what is the dispz.y2fl rh, 8u lbnw3;llacement from 0 to 8.0 s?

Does a car speedometer measure spee r6)ot4-tn1hq u7 ksxid, velocity? {speed|velocity}

  An object can have a varyinxbdtaag 28p yt6g -)1wg speed if its velocity is constant.

  The velocity of an obht/a l 0pd7tgx.rfe90ject can be negative when its acceleration is positive.

  If one object has a greater spe9x* ,f1 cgicb+sbgsq: fc0h 8ied than a second object, the first must have a greater acceleration8 ,fb sc9fxb:i+qgihg*scc01.

  Two cars emerge side by side from y i 5tckbunhxb +9) (3r;bmst2a 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 accel6 ;jwgcaci*e3 eration decreases.

  A baseball player hits a foul ball straight up i .iqg;n:6inq3eabfj zd ) -a6unto the air. It leaves the bat with a speed ofjbadi.ni:)q6q3eua gzf6 n- ; $120 \; km/h$. 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 its acceleratio,ae7hcl5h* e)xnl1:oou /jgmn, how does it ch71 meog*oj/cun:l 5a ,h h)xleange if air friction is ignored?

  As a freely falling object speeds up, what is happening to its acceleration, lcm:.w i n+n5dm5t2wt how does it change if air friction CAN NOT be icl n d+5.:tmtn5m2 iwwgnored?

  An object that is thrown vertically upward wtpm 1w1cru;/us5 +h1lhyyz6oi gt+: nill return to its original position with the same speed as it had initially if air resistance is negligible. If air resistance is 5:ptlu +y 1u1ihtw1ygh +or/n 6sc;mzappreciable, how will this result be altered?

  An object can have zero velocity anc+ ft;p oe e/a8d,7xu/rqgs 4sd nonzero acceleration at the same time.

  An object can have nonzero velocity and zero acceleration at the same timeu4 r6hr1/4ot6gt acqj.

  An elevator moving from the second floor to the fifth flo z. m,+ktzb4d:;zsen cor making no stops along the way has zerons4z dk; +.cmez zb:,t acceleration all the time.

  A rolling ball moves m: ij18b3pzi qfrom $x_1=1.8 \mathrm{~cm}$ to $x_2=-7.5 \mathrm{~cm}$ during the time from $t_1=1.4 \mathrm{~s}$ to $t_2=5.9 \mathrm{~s}$. What is its average velocity?  (数值)  $cm/s$ (only fill in numerical value please)

  A particle at $t_1=-2.4 \mathrm{~s}$ is at $x_1=2.1 \mathrm{~cm}$ and at $t_2=4.1 \mathrm{~s}$ is at $x_2=8.2 \mathrm{~cm}$. What is its average velocity?  (数值)  $cm/s$

  A person jogs eight complete laps around a quartee7r*) m wjoh4zooit.v( c0,zor-mile ($1 \; mile = 1609 \; m$) track in a total time of 9.4 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 87 m awt*kr: d4pb9n1ru y(c bay in 13.7 s. Itt dbbrpr:c1 9n(4uk y* then turns abruptly and gallops halfway back in 4.5 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 -d5:uqm;wt 3w i0xrll $12 \; m/s$ to $24 \; m/s$ in 5.5 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 adkc*2fsx rxnk479 ,t$22 \; m/s$ to rest in a distance of 84 m. What was its acceleration, assumed constant?  (数值)  $m/s^2$

  A light plane must reasnn7 2u(uk wqef-p( br9wdc5;ch a speed of $27 \; m/s$ for takeoff. How long a runway is needed if the (constant) acceleration is $2.9 \; m/s^2$ ?  (数值)  $m$

  A world-class sprinter can bursoaoe.gx/(.c ot out of the blocks to essentially top speed abouc oeg.x.oo( a/t $11.1 \; m/s$ in the first 12.6 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 an,vn0l1 xby 0c speed of $16 \; m/s$ to rest in 4.85 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 o7n xk*nde 5dibeu3 ar7gz wp0+ym5 2q*n the highway. Assuming a d wedk7 e5 anuq30zg7 y2rix+ndpm* 5b*eceleration of $7.00 \; m/s^2$, estimate the speed of the car just before braking.    $m/s$

  A car is behind a truv(q4i nqg37ns ;q7 uwkck 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 complete the 10,000-m run in less than 30.0 min. After xw:wse dlqk 1/v*+ 0isexactly 27.0 min, there are still 1100 m to gowei1xk ws/ ds 0ql:*+v. The runner must then accelerate at $0.20 \; m/s^2$ for how many seconds in order to achieve the desired time?    $s$