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= 16 / 8
= 2 N / cm
F₂ = k. Δx₂ --> Δx₂ = F₂ / k
= 10 / 2
= 5 cm
8. Ep = 1/2 F. x
0,6 = 1/2. 30 x --> x = 0,6/ 15
= 0,04
F = k. x --> k = F / x
= 30 / 0,04
= 750 N/m
9. --> F =m.g
= 50
F = Kp. x --> x = F / Kp
=