A coin is sliding down on a smooth hemi spherical surface of radiusR. The height from the bottom, where it looses contact with the surface is

A coin is sliding down on a smooth hemi spherical surface of radiusR.

1.	A coin is sliding down on a smooth hemi spherical surface of radiusR. The height from the bottom, where it looses contact with the surface is
Answer» `R//3` `2R//3` `3R//4` `4R//5` ANSWER :B