# centre of gravity

• Dec 8th 2008, 02:23 PM
bandy1989
centre of gravity
have managed to work out th centre of gravity by splitting the shape up into a rectagle and triangle
but i dont know how to combine them to get a c.o.g for he full shape.
the informaion is attatched.
• Dec 8th 2008, 03:21 PM
Skalkaz
If we have two mass point than the centre of gravity is the weighted mean:

$\vec r = (m_1*\vec {r_1} + m_2*\vec {r_2}) : (m_1 + m_2)$