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Δx = 0,25 m
F = 18 N
ditanyakn : k dan Ep ?
dijawab :
a. F = k x Δx
k = F/Δx
k = 18/0,25
k = 72 N/m
b. Ep = 1/2 k (Δx²)
= 1/2 x 72 x (0,25²)
= 1/2 x 72 x 0,0625
= 2,25 J
⇒
b. E = F · s
= 18 · 0,25 = 4,5 J