Question

The dimensions of energy are _____

(a) [ML^2T^-2]

(b) [MLT^-2]

(c) [ML^2T^-1]

(d) [MLT^-1]

This question was posed to me in semester exam.

The doubt is from Various Forms of Energy : The Law of Conservation of Energy in division Work, Energy and Power of Physics – Class 11

Answer 1

The correct choice is (a) [ML^2T^-2]

To elaborate: Energy = Force x Displacement

Units of energy = kg x (m/s^2) x m

 = kg x m^2 x s^-2

Therefore;

Dimensions of energy = [ML^2T^-2].