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- pegas
k = 200 N/m
Ep = 4 J
Δx = __ ?
Ep = ½ k (Δx)²
4 = ½ (200) (Δx)²
4 = 100 (Δx)²
(Δx)² = 4/100
Δx = √(4/100) = 2/10 = 0,2 m ← jawaban
Ok ?