Torque and energy have the same dimensionality, and so logically are measured in the same units (joules). However, it seems more natural to call the unit for the former a “newton-metre”, because torque does not feel like a form of energy, even though this elaborately described unit means no more or less than a joule.
I could not think of another example of two quantities physically quite different in character that would be measured in the same units, but I expect that there are others. Any examples, please?
Best Answer
Angular momentum and action have the same dimensions, and Planck’s constant quantizes both.