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Ec=10/2*2^2= 20J
Los datos que tienes son:
m = 10 kg
v = 2 m/s
Ec = ?
Calculamos la energía cinética.
Ec = 1/2 (m) (v)²
Ec = 1/2 (10 kg) (2 m/s)²
Ec = 5 kg (4 m²/s²)
Ec = 20 J
Respuesta.
La energía cinética es = 20 Joules
Opción C)