Two bodies of masses 1 kg and 3 kg are lying in xy plane at (0, 0) and (2, -1) respectively. What are the coordinates of the centre of mass ?

Explanation

`x_(cm)=(1xx0+3xx2)/(4)=(6)/(4)=(3)/(2)`
`y_(cm)=(1xx0+3xx(-1))/(4)=-(3)/(4)`
`(x_(cm),y_(cm))=((3)/(2),-(3)/(4))`
Hint : `x_(cm)=(m_(1)x_(1)+m_(2)x_(2))/(m_(1)+m_(2)), y_(cm)=(m_(1)y_(1)+m_(2)y_(2))/(m_(1)+m_(2))`