que energia cinetica posee un cuerpo de 20 kg que lleva una velocidad de 9km/h
9(1000)/3600= 2.5 m/s
Ec = 1/2(m)(v)²
Ec = 1/2(20kg)(2.5m/s)²
Ec = 62.5 J
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9(1000)/3600= 2.5 m/s
Ec = 1/2(m)(v)²
Ec = 1/2(20kg)(2.5m/s)²
Ec = 62.5 J