What is the angle of friction between two surfaces in contact, if coefficient of friction is \( ....

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What is the angle of friction between two surfaces in
\( \mathrm{P} \)
contact, if coefficient of friction is \( \frac{1}{\sqrt{3}} \) ?
(1) \( 15^{\circ} \)
(2) \( 30^{\circ} \)
(3) \( 45^{\circ} \)
(4) \( 60^{\circ} \)


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