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Daya : 600 Joule : 30 Detik = 20 Watt
(Henshin!)~
s = 50m (Jarak)
t = 0,5 menit --> 30 s atau 30 detik (waktu)
W = F x s
Usaha (P) = W/t sama dengan F x s/t
Jadi, P = F x s/t
= 12 x 50/30
= 20 W (watt)