A stone released with zero velocity from the top of a tower,

A stone released with zero velocity from the top of a tower, reaches the ground in 4 sec. The height of the tower is (g = 10m/s²)

Initial velocity (u) = 0; Time (t) = 4 sec and gravitational acceleration (g) = 10 m/s².
Height of tower

h = ut +	1	gt² = (0 × 4) +	1	10 × (4)²
	2		2