Question

Derive the unit of energy in terms of the fundamental unit of SI system.

Answer 1

Explanation :

1. Energy is the ability to do work, i.e., Energy = work
2. Energy = Work = force × displacement

= mass × acceleration × displacement

SI Unit of mass = kg

SI Unit of acceleration = m/s²

SI Unit of displacement = m

Now, Energy = mass × acceleration × displacement

= kg × m/s² × m

= kg m² / s²

= J