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v = 40 km/h
m = 180 kg
Ec = ?
Pasas los km/h a m/s
v = (40 km/h) (1000 m) / (1 km) (1 h) / (3600 s) = 11,11 m/s
Calculamos energía cinética.
Ec = 1/2 (m) (v)²
Ec = 1/2 (180 kg) (11,11 m/s)²
Ec = 90 kg (123,43 m²/s²)
Ec = 11108,7 Joules-------Respuesta