A thin flat circular ring of radius is placed gently over the surface of water

PHYSICS · Numerical · CBSE · Physics · Mechanical Properties of Fluids · Mechanical Properties of Fluids

Problem

A thin flat circular ring of radius

5\text{ cm}

is placed gently over the surface of water. If the surface tension of water is

0.07\text{ N m}^{-1}

, find the excess force required to take it away from the surface.