Question

A stone is thrown vertically upward with an initial velocity u from the top of a tower, reaches the ground with a velocity 3u. The height of the tower is

Answer 1

Answer:8u^2/2g

Explanation:Taking downward as positive,

U=-u

a=g

V=3u

s=h

9u^2=u^2+2gh

h=8u^2/2g