An airplane pilot with a mass of 90.0-kg pulls out of a dive by following the arc of a circle whose radius is 300 m at a constant speed of 190 km/h.
1) At the bottom of the circle, what are the direction and magnitude of his acceleration?
2) What is the net force acting on him at the bottom of the circle?
3) What is the force exerted on the pilot by the airplane seat?