A book lying on a horizontal surface is an example of

Let F₁, F₂, F₃, F₄, F₅ be the forces acting on the particles P,Q,R,S,T,U respectively ,then the resultant force is equal to their

There are ______ stages of equilibrium.        

A body is said to be in _______ if it changes its position without change in equilibrium after being disturbed.

The stability of state of a body depends upon

Rolling of  ball is an example of

Stability of a body depends on the

Stability of the state of a body ______ with base area.

For  all regular shape bodies the geometric centre is the

Each particle is  attracted towards the centre of the earth with a force equal to its