[QUE/CM-01017#Solu] Falling Chain (solved)

 A chain lies pushed together at the edge of a table, except for a piece which hangs over it, initially at rest. The links of the chain start moving one at a time; neglect friction. The energy written in the usual form is no longer an integarl of motion. Instead impulsive  ( Carnot)  energy loss must be taken into accountb in writing the balance of energy.

Source::Sommerfeld