Engineering Mechanics
A spherical body is symmetrical about its perpendicular axis. According to Routh's rule, the moment of inertia of a body about an axis passing through its centre of gravity is (where, M = Mass of the body, and S = Sum of the squares of the two semi-axes.)

MS/3
None of these
MS/5
MS/4

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Engineering Mechanics
The static friction

All of these
Always acts in a direction, opposite to that in which the body tends to move
Is independent of the area of contact, between the two surfaces
Bears a constant ratio to the normal reaction between the two surfaces

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