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Los datos son:
m = 500 kg
v = 108 km/h
Ec = ?
Pasas las unidades al SI
v = (108 km/h) (1000 m) / (1 km) (1 h) / (3600 s) = 30 m/s
Calculamos.
Ec = 1/2 (m) (v)²
Ec = 1/2 (500 kg) (30 m/s)²
Ec = 250 kg (900 m²/s²)
Ec = 225000 J
Respuesta.
Ec = 225000 J