statics

Question: A hemi-spherical shell rests on a rough inclined plane, whose angle of friction is $\lambda $ , the inclination of the plane base of the rim to the horizon cannot be greater than

1) ${{\sin }^{-1}}(2\sin \lambda )$

2) ${{\cos }^{-1}}(2\cos \lambda )$

3) ${{\tan }^{-1}}(2\tan \lambda )$

4) ${{\cot }^{-1}}(2\cot \lambda )$

Solution:

Explanation: No Explanation

Friction

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