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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