Question

Find potential at a point 'P' at a distance 'x' on the axis away from centre of a uniform ring of mass M and radius R .

Answer 1

Explanation:

Gravitational field due to ring at a distance d=3R on its axis is

E=(R2+d2)3/2GMd=(R2+3R2)3/2GM3R=38R3GMR=8R23GM

Therefore, Force on the sphere = Mass of the sphere ×E

Force on the sphere =8ME=R23GM2