1. Mass (M): Mass is a measure of the amount of matter in an object. It is a scalar quantity and is measured in kilograms (kg).

2. Length (L): Length is the distance between two points. It is a scalar quantity and is measured in meters (m).

3. Time (T): Time is the duration of an event. It is a scalar quantity and is measured in seconds (s).

4. Force (F): Force is a push or pull on an object. It is a vector quantity and is measured in newtons (N).

5. Energy (E): Energy is the ability to do work. It is a scalar quantity and is measured in joules (J).

6. Power (P): Power is the rate at which work is done. It is a scalar quantity and is measured in watts (W).

These six quantities are the basis of mechanics and are used to describe the motion of objects.