A ball is dropped from 13.6 ft above the ground. Assume that air-drag is negligible in this case. (a) At what height is half of its energy kinetic

A ball is dropped from 13.6 ft above the ground. Assume that air-drag is negligible in this case.

(a) At what height is half of its energy kinetic and half potential?

Blank = ft

(b) Using energy considerations only, what is the velocity of the ball just as it hits the ground?

 Blank = ft/s