Question

The dimensional formula for is in the relation y = A Senest is (a) [M^ r L^ * T]; \ ML^ * T^ prime \ (b) \ M^ * L^ * T^ prime \ (c)​

Answer 1

Modulus of elasticity is given by Y = F .L / A.∆L

Dimensions of force, F = { MLT -2 }

Dimension of Area , A = { L²}

Dimension of Length , L = { L }

Thus , dimension of modulus of elasticity

Y = { MLT-2} { L} / { L²} { L}

= { ML-1T-2}