Moment of inertia of a circular section about an axis perpendicular to the section is

Coefficient of friction is the ratio of the limiting friction to the normal reaction between the two bodies.

A smooth cylinder lying on its convex surface remains in __________ equilibrium.

If the resultant of two equal forces has the same magnitude as either of the forces, then the angle between the two forces is

A body of weight W is required to move up on rough inclined plane whose angle of inclination with the horizontal is α. The effort applied parallel to the plane is given by(where μ = tanφ = Coefficient of friction between the plane and the body.)