A 79.2-kg airplane pilot pulls out of a dive by following, at a constant speed of 191 km/h, the arc of a circle whose radius is 321.0 m
(a) At the bottom of the circle, what are the direction and magnitude of his acceleration?
magnitude
direction
(b) What is the net force acting on him at the bottom of the circle?
(c) What is the force exerted on the pilot by the airplane seat?