Question bank/NEET UG/Physics

A frictionless circular wire of unit radius is fixed on the horizontal plane. Two-point particles of unit mass start moving simultaneously from point A($\theta=\frac{\pi}{2}$) with identical uniform angular speeds in opposite directions, and meet again at point B ($\theta=-\frac{\pi}{2}$). During this time, which of the following figures schematically represent the magnitude of the total linear momentum $P$ of the system, as a function of $\theta$?
[IMAGE]

Source: geekyrakshit/indian-exam-questions / reneet2026-code50