A disc is rolling (without slipping) on a horizontal surface. $\text{C}$ is its centre and $\text{Q}$ and $\text{P}$ are two points equidistant from $\text{C}$. Let ${\text{v}}_{\text{P}},{\text{v}}_{\text{Q}}$ and ${\text{v}}_{\text{C}}$ be the magnitude of velocities of points $\text{P},\text{Q}$ and $\text{C}$ respectively, then