80 km/h = 22,2 m/s; 120 km/h = 33,3 m/s
ΔEc = 1/2 m (V² - Vo²)
ΔEc = 1/2 . 3000 kg [(33,3 m/s)² - (22,2 m/s)²]
Saludos.
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Verified answer
80 km/h = 22,2 m/s; 120 km/h = 33,3 m/s
ΔEc = 1/2 m (V² - Vo²)
ΔEc = 1/2 . 3000 kg [(33,3 m/s)² - (22,2 m/s)²]
ΔEc ≅ 924000 J = 924 kJ
Saludos.