A 1m long rod having a constant cross sectional area is made of four materials. The first 0.2 m are made of iron, the next 0.3 m of lead, the following 0.2 m of aluminium, and the remaining part is made of copper. Find the centre of mass of the rod. The densities of iron, lead, aluminium, and copper are 7.9 xx 10^(3) kg//m^(3), 11.4 xx 10^(3), 2.7 xx 10^(3) kg//m^(3) and 8.9 xx 10^(3) kg//m^(3) respectively.

A 1m long rod having a constant cross sectional area is made of four m

1.	A 1m long rod having a constant cross sectional area is made of four materials. The first 0.2 m are made of iron, the next 0.3 m of lead, the following 0.2 m of aluminium, and the remaining part is made of copper. Find the centre of mass of the rod. The densities of iron, lead, aluminium, and copper are 7.9 xx 10^(3) kg//m^(3), 11.4 xx 10^(3), 2.7 xx 10^(3) kg//m^(3) and 8.9 xx 10^(3) kg//m^(3) respectively.
Answer» ANSWER :0.49 m from the LEFT of IRON ROD