Question

what is rigid body?​

Answer 1

Answer:

Or you may say the body which does not deform under the influence of forces is known as a rigid body. But, in real life, there would be some force under which the body starts to deform. For example, a bridge does not deform under the weight of a single man but it may deform under the load of a truck. or ten trucks.

Answer 2

A body is said to be RIGID if the separation between any of its two constituent particles does not change , no matter how small or large force is applied .

It's the required answer to your question...