- 天同Lv 77 years agoFavorite Answer
(a) Toughness is the ability of a material to absorb energy and plastically deform without fracturing.
Ductility of a solid material is its ability to deform under tensile stree.
(b) Maximum strain = 6/250 = 0.024
(c) Cross-sectional area of rod = pi x 0.003^2 m^2 = 2.827x10^-5 m^2
Stress = 500 000/2.827x10^-5 N/m^2 = 1.768 x 10^10 N/m^2
Strain = 2/500 = 4x10^-3
Modulus of elasticity = 1.768x10^10/4x10^-3 N/m^2 = 4.42 x 10^12 N/m^2