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ditanya: m?
penyelesaian:
Ep=mgh
300 kg.m²/s² = m×10m/s²×15m
300 kg.m²/s² =m×150m²/s²
m=300kg.m²/s² : 150m²/s²
m=2kg
jadi, massa kelapa tersebut adl 2 kg