Question

S
20
Dimensions of stress are:
(1) [ML2T-2]
(2) [MLºT-2]
(3) [ML-1T-2]
(4) [MLT-2]​

Answer 1

Option 3

Explanation:

The dimension of stress is equal to the dimension of pressure.

Pressure = Force/Surface Area

dimension of Force = [MLT-2] ...............(1)

dimension of Surface Area = [L²] .............(2)

On dividing (1) and (2), we get :

Dimension of pressure = Dimension of stress = [ML-1T-2]