A food packet is dropped from a plane going at an altitude of 100 m. What is the path of the packet as seen from the plane?
Straight line perpendicular to the horizontal
Let v1 be the velocity of the plane w.r.t to ground.
∴ vA = v1^i
∴ Then vB = v1^i − gt^j
As the package has an initial velocity of v1^i and an acceleration of g downwards now velocity of B w.r.t A
vBA = vB - vA
= v1^i - gt^j - v1^i
∴ The package will look like it is falling vertically downward w.r.t. the plane.