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v = 50 m/s
g = 10 m/s
Dit Ek setelah 3 sekon
jawab.
Δs = v.t
= 50.3
= 150 m
W = F.Δs
= m.g.Δs
= 1 . 10 . 150
= 1500 j
W = ΔEk = 1/2 mv^2 = 1500 j