Rigidity is defined as the property exhibited by the solid to change in its shape. That is when an external force is applied to the solid material, there won’t be any change in the shape. This shows that the particles are closely packed and the attraction between these particles is very strong.
Characteristics of rigidity
- It is the strongest force of attraction between particles.
- This property makes the solid rigid.
- Rigidity gives the perfect shape to solids, the particles in the solid are tightly packed.
Solids: Solids are the best example of rigidity.
- Solids can very easily be distinguished from liquids by their definite shape, considerable mechanical strength, and rigidity.
- There are many different types of solids. Some are soft and others are hard. Some are rigid and others are flexible.
- The atoms and molecules of solids are held together by pulling forces called bonds.
Why are solids rigid?
The atoms in solids are held together by interatomic forces. The average location of the atoms in a lattice does not change with time. Since the atoms are almost lacking in mobility, their kinetic energy is negligibly small. It is this lack of mobility that makes a solid rigid.