posted by John .
At a particular instant, a stationary observer on the ground sees a package falling from a moving airplane with a speed vobserver at an angle θ to the vertical. To the pilot flying horizontally at a constant speed relative to the ground the package appears to be falling vertically with a speed vpilot at that same instant. What is the speed of the pilot relative to the ground in terms of the given quantities?
Vpilot = Vobserver sin θ