Mass
- Mass is an intrinsic property of all matter
- It is a scalar quantity
- It is a measure of the tendency to resist change in motion.
- SI unit is kilogram (kg)
Weight
- Weight is a measure of the gravitational force on a mass
- Consequently, weight on Earth will differ from that on another planet
- Even though the mass will remain the same
- It is a vector quantity
- It is determined by the relationship
- where is the acceleration due to gravity
- is also defined as the gravitational field strength
- on Earth’s surface is
- SI unit is m/s² or
Measurement of Weight and Mass
- By adding masses in small increments to
until it balances 
completely, we can determine the mass .
