Circular motion question

Question

A 76-kg pilot at an airshow performs a loop de loop with his plane. At the bottom of the 52-m radius loop, the plane is moving at 48 m/s. Determine the net force acting upon the pilot.

Answer 1

N - mg = mv²/r; N = mg + mv²/r = 76kg·9.8m/s² + 76kg·48²m²/s²/52m = 4112.2 N