I have been led to the idea that there is in Newtonian mechanics only one form of mass, gravitational mass, which is derived from a gravitational potential as primordial, wit inertial mass = gravitational mass as a consequence of universality of free fall and conservation of energy. This is a clear picture, which can be understood by everybody, and which has shown to work excellent in practice.
This is not the idea of modern physics, which plays with several different forms of mass:
- gravitational mass
- inertial mass
- rest mass (relativistic)
- Higgs mass.
with different origins:
- gravitation
- Higgs mechanism and strong force
- relativity theory
- Higgs mechanism.
No doubt this shows a very complex picture and the questions pile up: Why so many different forms with different origins and why then is an Equivalence Principle adopted stating that inertial mass = gravitational?
- Warum es einfach machen, wenn mann es so schön kompliziert machen kann?
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