The dimensional formula coefficient of elasticity is given by, [M 1 L-1 T-2] Where, M = Mass; L = Length; T = Time; Derivation. Coefficient of Elasticity = Stress × [Strain]-1. . . . (1) Since, Stress = Force × [Area]-1. . . (2) And, Force = M × a = [M × LT-1 × T-1] ∴ The dimensions of force = [M 1 L 1 T-2] . . . . (3) The dimensional.