From what height did the stone fall if it hit the ground at a speed of 10m / s.

To calculate the height from which a given stone should have fallen, we apply the formula: S = h = (V ^ 2 – V0 ^ 2) / 2a = V ^ 2 / 2g.

Values of constants and variables: V – speed when hitting the ground (V = 10 m / s); g – acceleration due to gravity (g ≈ 10 m / s2).

Calculation: h = V ^ 2 / 2g = 10 ^ 2 / (2 * 10) = 5 m.

Answer: Before the fall, the given stone was at a height of 5 m.