- #36
j_phillips
- 6
- 0
I was thinking about this today and looked up a bit about the history of mass measurement. Obviously it is still defined by a physical object (an ingot of some alloy). My question is more toward defining it another way. Why not use Kepler's law's aka. gravity? If we can define Force as a kg*m/s^2, then why not equate force to electrostatics or any other branch?