\(A\) is a fixed point at a height \(H\) above a perfectly inelastic smooth horizontal plane. A light string of length \(L\) (\(L>H\)) has one end attached to \(A\) and other to a heavy particle. The particle is held at the level of \(A\) with string just taut and released from rest. Find the height of the particle above the plane when it is next instantaneously at rest.
This question is from the book DC Pandey.
Also try this.