A smooth chain of length $2 \mathrm{~m}$ is kept on a table such that its length of $60 \mathrm{~cm}$ hangs freely from the edge of the table. The total mass of the chain is $4 \mathrm{~kg}$. The work done in pulling the entire chain on the table is (Take, $g=10 \mathrm{~m} / \mathrm{s}^2$)