22) A smooth cylinder lying on its convex surface remains in ______ equilibrium.

Answer is:

unstable

Explanation:

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

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23) Three forces acting on a rigid body are represented in magnitude, direction and line of action by the three sides of a triangle taken in order. The forces are equivalent to a couple whose moment is equal to

Answer is:

twice the area of the triangle

Explanation:

Three forces acting on a rigid body are represented in magnitude, direction and line of action by the three sides of a triangle taken in order. The forces are equivalent to a couple whose moment is equal to twice the area of the triangle.

24) The principle of transmissibility of forces states that, when a force acts upon a body, its effect is

Answer is:

minimum, if it acts at the centre of gravity of the body

Explanation:

The principle of transmissibility of forces states that, when a force acts upon a body, its effect is minimum, if it acts at the centre of gravity of the body.