40 An insect crawls up a hemispherical surface very slowly see fig The coefficient of friction between the insect and the

Question

40 An insect crawls 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 a with the vertical the maximum possible value of a is given by

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