What is meant by the mass of an object and by its weight on the Earth?
- Amass: its momentum divided by its velocity; weight: the work done in lifting it one metre
- Bmass: the gravitational force on it; weight: the property that resists its acceleration
- Cmass: the pull of the Earth on it; weight: its mass divided by the acceleration of free fall
- Dmass: the property that resists its acceleration; weight: the pull of the Earth on it