An insect craws up a hemispherical surface very slowly (see fig.). The coefficient of
Channel: Doubtnut
Date: 2020-07-05

An insect craws up a hemispherical surface very slowly (see fig.). The coefficient of friction between the insect and the surface is `1//3`. If the line joining the center of the hemispherical surface to the insect makes an angle `alpha` with the vertical, the maximum possible value of `alpha` is given by