Question

An airplane flying at 120 km/h due west moves into a region where the wind is blowing at 40 km/h due east of the plains original vector velocity is very plain, what is the expression for the plains resulting velocity in terms of the plane?

Answer 1

Velocity of plane is given as

$v_p = 120 km/h$ towards west

velocity of wind is given as

$v_w = 40 km/h$ towards east

now the net velocity of the plane will be given as

$\vec v_{net} = \vec v_p + \vec v_w$

$\vec v_{net} = 120 - 40$

$\vec v_{net} = 80 km/h$ towards west

so the net velocity of plane will be 80 km/h towards west