Explanation:
Stress = force / area
σ = F / A
σ = (4.5 kg × 9.8 m/s²) / (1.28 cm² × (1 m / 100 cm)²)
σ = 344,531 Pa
σ = 345 kPa
Strain = elongation / initial length
ε = ΔL / L₀
ε = 1.4 cm / 10 cm
ε = 0.14
Young's modulus = stress / strain
E = σ / ε
E = 345 kPa / 0.14
E = 2460 kPa
