An insect crawls up a hemispherical surface very slowly as shown in the figure. The coefficient of friction between the surface and the insect is 
. If the line joining the centre of the hemispherical surface to the insect makes an angle a with the vertical, the maximum possible value of 
is given by
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
For equilibrium,
But for limiting case 
or 
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