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P = ΔEp/t
m₂g₂h₂ - m₁g₁h₁
P = ________________
t
mg (h₂ -h₁)
P = ___________
t
2000 • 10 (50 - 0)
P = ______________
20
20000 • 50
P = ___________
20
P = 50000 Watt
P = 50 kWatt
Jadi, daya yang diperlukan adalah 50 kWatt