My point is that the mass is constant no matter what you do. Sometimes that’s not true. Cars lose mass over time because the gasoline is burned and lost via the tailpipe.
In hindsight, I should have just said that we’re pretty sure that there are no macroscopic objects with zero mass. What’s an object that you can push on but has no stuff in it?
How does that enter into it? The product of the mass and 0 would still be 0 if the mass had a different value.
My point is that the mass is constant no matter what you do. Sometimes that’s not true. Cars lose mass over time because the gasoline is burned and lost via the tailpipe.
In hindsight, I should have just said that we’re pretty sure that there are no macroscopic objects with zero mass. What’s an object that you can push on but has no stuff in it?