A uniform chain of length 2 m is kept on a table such that a length of 60 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?
[2004]
(a) 12 J
(b) 3.6 J
(c) 7.2 J
(d) 1200 J