KVPY SA Exam 2013 Question Paper

Two stones of mass ${\mathit{m}}_1$ and ${\mathit{m}}_2$ (such that ${\mathit{m}}_1>{\mathit{m}}_2$) are dropped At time apart from the same height towards the ground. At a later time t the difference in their speed is ΔT and their mutual separation is ΔS. While both stones are in flight