Physics-
General
Easy
Question
An insect crawls up a hemispherical surface very slowly (see the figure). The coefficient of friction between the insect and the surface is 1/3. 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 a is given by :
- cot
= 3
- tan = 3
- sec = 3
- cosec = 3
= 3
= 3
= 3
= 3
The correct answer is: cot = 3
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