A point `P` lies on the axis of a fixed ring of mass `M` and radius `a`, at a distance a
Channel: Doubtnut
Date: 2020-08-30

A point `P` lies on the axis of a fixed ring of mass `M` and radius `a`, at a distance a from its centre `C`. A small particle starts from `P` and reaches `C` under gravitational attraction only. Its speed at `C` will be.