Question

What are the dimensions of Energy?

(a) (MLT^-2)

(b) (M^-1L^3T^-2)

(c) (M L^2T^-2)

(d) (LT^-2)

The question was posed to me in an online interview.

This intriguing question comes from Unit Systems topic in division Introduction & Unit Systems of Food Processing Unit Operations

Answer 1

The correct option is (c) (M L^2T^-2)

To elaborate: Energy is also known as work done, for which the formula is the product of force into displacement, i.e. Work = Force (mass x acceleration) X Displacement (in meters). We know that the dimensions for force and displacement are (MLT^-2) and (L) respectively. Therefore, the dimensions for Energy are (M L^2T^-2).