Question

The unit of energy is a derived unit, why?​

Answer 1

Answer:

It is a derived unit because it is not one of the 7 base units. The “joule” is the “special name” given by the writers of the SI Brochure to the newton metre aka the N m. ... It is a derived unit because it is not one of the 7 base units.

Answer 2

Answer:

The unit energy will be whatever is the unit of force times the unit of length. A Joule is the same as a Newton-Meter, which are already defined in the SI system. ... But once we define length, time, and mass independently, we cannot define energy independently. The Joule is a "derived unit"