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F = 20N
y = 40 cm = 0,4m
Dit:
a. k
b. Ep
jwb:
a. k = F/y
k = 20/0,4
k = 50N/m
b. Ep = 1/2ky²
Ep = 1/2.50.(0,4)²
Ep = 4J
Δx = 40cm=0,4m
k=?
Ep=?
F=k Δx
20=k x 0,4
k=50N/m
Ep = 1/2 F Δx
Ep = 1/2 20 0,4
Ep= 4 j