At the instant 0 = 70°, the boy's center of mass G has a downward speed vg = 15 ft/s. Determine the rate of increase in his speed and the tension in each of the two supporting cords of the swing at this instant. The boy has a weight of 60 lb. Neglect his size and the mass of the seat and cords. 10 ft

At the instant 0 = 70°, the boy's center of mass G has a downward speed vg = 15 ft/s. Determine the rate of increase in his speed and the tension in each of the two supporting cords of the swing at this instant. The boy has a weight of 60 lb. Neglect his size and the mass of the seat and cords. 10 ft