Question

A helicopter hovers 200 meters over the ground and releases a relief packet. How much time does it take for the food packet to reach the ground?

Answer 1

I think it would take about ~6.39 seconds
D = (1/2)at^2 
(Where initial velocity is 0m/s) 

200m = (1/2)(9.8 m/s^2)(t^2) 
Sqrt(2x200m)/(9.8m/s^2) = t 

T = ~6.39 seconds (assuming no air resistance)