La energía cinética es Ec = 1/2 m V²
72 km/h = 20 m/s
Saludos.
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La energía cinética es Ec = 1/2 m V²
72 km/h = 20 m/s
Ec = 1/2 . 4 kg (20 m/s)² = 800 J
Saludos.