[Phys-l] teaching energy

[<carmelo@pacific.net.sg>]

Ludwik Kowalski wrote:
> In my mind rest energy is potential energy.

In the mind of particle physicist, such as Frank Wilczek, rest energy is *mostly* kinetic energy.

"Most of the proton’s mass arises from the fact that the quarks and gluons inside it are moving around quite vigorously. Therefore they have a lot of energy." 
                                            Frank Wilczek

Alphonsus