Phoenix Business Daily

If mass is a measure of inertia, does that mean if an object increases in mass as it is in motion?

Mass is a measure of inertia, right? A car traveling at a high speed has a lot of inertia. Does this mean that the faster the car goes, the greater the inertia and the greater the mass?

Public Comments

1. No: Inertia as energy is MxV. The increase comes from the speed, not the mass. (Until you get to relativistic speeds that is.) Inertia as a property is resistance to acceleration. It doesn't change. (Again, until you get ....). You are confusing the terms.
2. Yes.