How many seconds will a stone fall from a 125 meter high cliff?

Initial data: H (height of the cliff from which the stone falls) = 125 m; the fall of a stone from a cliff is considered free (V0 = 0 m / s); air resistance is not taken into account.

Reference data: g (acceleration of gravity) ≈ 10 m / s2 = a (acceleration of a stone).

The duration of a stone falling from a cliff can be expressed from the formula: S = H = V0 * t + 0.5 * a * t ^ 2 = 0 + 0.5 * g * t ^ 2, whence t = √ (2h / g).

Calculation: t = √ (2 * 125/10) = 5 s.

Answer: The stone will fall from the cliff for 5 seconds.