A uniform chain of length 2 m is kept on a table such that a length of60 cm hangs freely from the edge of the table. The total mass of the chain is 4 kg. What is the work done in pulling the entire chain on the table ?

see fig  Mass per unit length =ML=42=2kg/m  Mass of the hanging chain =0⋅6×2=1.2kg Centre of mass of the hanging part =0⋅6+02=0⋅3m Work done in pulling the chain on the table is equal to work done agaitrst gravity W=mgh=1⋅2×10×0⋅3=3⋅6 joule