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- Daya
m = 10 kg
g = 10 m/s²
h1 = 4 m
h2 = 10 m
t = 2×60 = 120 s
P = __ ?
Usaha
W = ΔEp
W = m g (h2 - h1)
W = (10) (10) (10- 4)
W = 600 J
daya
P = W/t
P = 600 / 120 = 5 W ← jawaban
Ok ?