Question

Dimensional formula $\text{M L}{}^{-1}\text{T}{}^{-2}$ doesnot represent the physical quantity

• A. Young's modulus of elasticity
• B. Stress
• C. Strain
• D. Pressure

Answer 1

The correct option is C Strain

Strain is defined as ratio of change in length to original length
So, Strain has no units.
Stress, pressure , Youngs modulus have same units $\text{kg m}{}^{-1}\text{s}{}^{-2}$ and dimensions $\text{M L}{}^{-1}\text{T}{}^{-2}$