In a hollow sphere the maximum height with respect to the lowest point at which a particle remains in equilibrium, is one-tenth of the radius of the sphere. What is the coefficient of friction between the sphere and the particle?

In a hollow sphere the maximum height with respect to the lowest point

1.	In a hollow sphere the maximum height with respect to the lowest point at which a particle remains in equilibrium, is one-tenth of the radius of the sphere. What is the coefficient of friction between the sphere and the particle?
Answer» ANSWER :0.484