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Explicacion
m = 247 g = 0.247 kg
h = 15 m
g = 10 m/s²
t = √ 2 h / g = √ 2 (15 m) / 10 m/s² = 1.73 s
Vf = g t = (10 m/s²) (1.73 s) = 17.3 m/s
Ec = m v² / 2 = 0.247 kg (17.3 m/s)² / 2 = 36.96 Joule
Ep = m g h = 0.247 kg x 10 m/s² x 15 m = 37.05 Joule