Question

unit and dimensional of young`s modulus of elasticity​

Answer 1

Answer:

Unit of Young's Modulus is Pascal or N/m²

Dimension of Young's Modulus is [ M L⁻¹ S⁻²]

Explanation:

Young's modulus = Stress/Strain 

                            = F/A x e/l

                            = ma/A x e/l

Where,

F = force

A = area of cross section

e = elongation

l = actual length

a = acceleration 

m = mass                          

 By their units,

                                    Y = [(kg x m/s²) / (m²)] x m/m

                                    Y = (Kg x m) / (m²s²)

                                    Y = Kg/ms²

In dimension formula    Y = [ M L⁻¹ S⁻²]