How high will a body rise that is projected vertically upward with a speed of 100 ft/s?

Question

How long will it take for the body to reach its maximum height?

Answer 1

g = 32 ft/s^2 ... so time to peak is ... (100 ft/s) / (32 ft/s^2) = ?

initial K.E. equals peak P.E.
... 1/2 m v^2 = m g h
... h = v^2 / (2 g) = 100^2 / (2 * 32) = ?