Dimensions of stress are:

Question

Question

This question was previously asked in

NEET 2020 Official Paper (Held On: 13 September, 2020)

Answer 1

Explanation:

Stress - Stress is defined as the force that is acted on an object per unit area. It is measured as N/m².

Stress \( = \frac{{Force}}{{Area}}\) ----(1)

Force = mass \(\times\) acceleration

⇒ F = ma

⇒ [F] = [MLT^-2]

and area, [A]= [L²]

Putting these values in equation (1) we have;

Stress = \( \frac{{\left[ {ML{T^{ - 2}}} \right]}}{{\left[ {{L^2}} \right]}}\)

⇒ Stress = \( \left[ {M{L^{ - 1}}{T^{ - 2}}} \right]\)

Hence, option 2) is the correct answer.