A jet pilot takes his aircraft in a
vertical loop (Fig. 5-43). (a) If the jet is moving at a speed of 1200 km/h at
the lowest point of the loop, determine the minimum radius of the circle so
that the centripetal acceleration at the lowest point does not exceed 6.0 gs.
(b) Calculate the 78-kg pilots effective weight (the force with which the seat
pushes up on him) at the bottom of the circle, and (c) at the top of the circle
(assume the same speed).