Physics - Elasticity Question with Solution | TestHub

An ice block at $0^{\circ }\mathrm{C}$ is dropped from height ' $h$ ' above the ground. What should be the value of ' $h$ ' so that it just melts completely by the time it reaches the bottom assuming the loss of whole gravitational potential energy is used as heat by the ice ? [Given : ${\mathrm{L}}_{\mathrm{f}}=80\mathrm{cal}/\mathrm{gm}$ ]