List of top Physics Questions on Relative Motion asked in TS EAMCET

Five stones are dropped successively from a height of 50 m from the ground with a time interval of half a second between two successive stones. The relative velocity between the first and third stones when they are in motion is \[ (g=10~\text{m s}^{-2}) \]

A monochromatic radiation of wave length $\lambda$ is incident on a hydrogen sample in ground state. The sample subsequently emits radiation of six different wave lengths, then the value of $\lambda$ is [Use $ch = 1242\text{ eV-nm}$]