What is a rigid body ? Explain the differences between rigid body and solid body.

Explanation

A rigid body generally means a hard solid object having a definite shape and size
. A system of particles in which interparticle distance remain invariant is known as a rigid body.
A solid body can be deformed whereas a rigid body can not be deformed.
A rigid body is an ideal concept, hence it is difficult to obtain it in practice.
In reality, solid bodies can be stretched, compressed and bent mean it can be deformed. Hence solid bodies are not perfectly rigid.