Mass
What is this thing called Mass?
Mass is a property of an object. In Newton’s theory it is always constant for a given object.
Mass is not weight, not volume, . . . .
Mass is a quantitative measure of how hard it is to accelerate the object.
- Mass of objects can be calibrated by measuring their acceleration by the same force
- Tested experimentally -- found to be true that different measurements with different forces give consistent values of the mass