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L = 140 cm = 1,4 m
A = 2 mm² = 2×10^-6 m²
F = 100 N
∆L = 1 mm = 10^-3 m
E = __?
modulus elastisitas
E = F L / (A ∆L)
E = 100 • 1,4 / (2×10^-6 • 10^-3 )
E = 7×10^10 N/m² ← jwb