# A free falling body reaches the ground at a speed of 40 m / s. From what height did the body fall?

September 20, 2021 | education

| V0 = 0 m / s.

V = 40 m / s.

g = 9.8 m / s2.

h -?

h = (V² – V0²) / 2 * g.

Since the body is falling, its initial velocity is V0 = 0 m / s.

h = V² / 2 * g.

h = (40 m / s) ² / 2 * 9.8 m / s2 = 81.6 m.

Answer: the height of the fall of the stone was h = 81.6 m

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