[dleviwing]

Force is the entity; energy is the measurement. The measurement determines the units of measure one wishes to present. There are many forms of energy other than the two you mentioned Pat; heat, electrical, bio, and so on. “G” can be expressed in several different units of measure from watts, ergs, joules, calories, and so on. As I’ve stated many times; “ always ask yourself, what’s the entity and what’s the dimension?” Don’t treat the dimension as the entity an the entity as the dimension. There are no entities in Einstein’s equation E=mc^2 and the same is true for many other equations. We use mass as a quantitative measure of matter and energy as a quantitative measure of force. Presuming that force and matter are two unique entities is the dilemma Newton was unable to solve and his error is still being taught without explanation today. Most professors and good physics text books make this quite clear.