[spunkets]

"If I have a bowling ball at the top of a hill, it's potential energy, if I let it roll it's kinetic energy, does the bowling ball gain mass? When it stops, does it then lose its gained mass?

Yes, to both questions. As with your ordinary chem though, the E and m change is too small to be significant.

The total mass is given by,

m = m₀/sqrt(1-v²/c²)

m₀ is the rest mass. You can see that if v is small the changes don't mean much.

[PatrickHenry]

Placemarker