An aeroplane lands at $216 k m / h$ and stops after covering a rumway of $2 k m$ . Calculate the acceleration and the time, in which it comes to rest.

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Solution

inital v elocity $(u) = 216 k m / h$

$= 60 m / s$

final velocity(v) $= 0 m / s$

displacement after covering a ranway of 2km

$= 2000 m$

using the formula,

$v^{2} - u^{2} = 2 a s$

$0 - 3600 = 2 a (2000)$

hance,
$a = - 0.9 m / s^{2}$

again,using the formula,

$v - u = a t$

$0 - 60 = 0.9 t$

hence,t is approximately $66.67$ sec.

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An aeroplane lands at 216km/h and stops after covering a rumway of 2km. Calculate the acceleration and the time, in which it comes to rest.

inital v elocity (u)=216km/h=60m/sfinal velocity(v)=0m/sdisplacement after covering a ranway of 2km=2000musing the formula,v2−u2=2as0−3600=2a(2000)hance,a=−0.9m/s2again,using the formula,v−u=at0−60=0.9thence,t is approximately 66.67sec.

An aeroplane lands at $216 k m / h$ and stops after covering a rumway of $2 k m$ . Calculate the acceleration and the time, in which it comes to rest.