Aaah, good old "in a vacuum," surely one of physics most convenient simplifications, together with frictionless surface, the point particle and it's big-boned cousin perfect sphere and of course the infinite featureless plane. Except that a vacuum is actually kinda sorta possible in the real world too.
Aaah, good old "in a vacuum," surely one of physics most convenient simplifications, together with frictionless surface, the point particle and it's big-boned cousin perfect sphere and of course the infinite featureless plane. Except that a vacuum is actually kinda sorta possible in the real world too.