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• usaha
m = 2000 kg
Vo = 36 km/jam = 10 m/s
Vt = 72 km/jam = 20 m/s
W = __?
usaha
W = ∆Ek
W = ½ m (Vt² - Vo²)
W = ½ • 2000 • (20² - 10²)
W = 300000 J ← jwb