This has already been mentioned in the section on forces. Every object has a centre of mass, but quite often, it is referred to as the Centre of Gravity.

At the end of this section you should:

• Know the centre of mass of some regular shapes.

• Understand how the centre of mass affects stability.

• Know how to find the centre of mass of an irregular shape.

• Be aware of the role which it plays in sports.

Look at this site: Internet site link 

• Information
• Centre of Gravity and Sports
• Mechanics Index