Question

what is rigid body? with example

Answer 1

a body which does not get deformed under the action of a force or a number of forces is called a rigid body
example : wood

Answer 2

Inphysics, arigid bodyis a solidbodyin whichdeformationis zero or so small it can be neglected. Thedistancebetween any two givenpointson a rigid body remains constant in time regardless of externalforcesexerted on it. A rigid body is usually considered as a continuous distribution of mass.In the study ofspecial relativity, a perfectly rigid body does not exist; and objects can only be assumed to be rigid if they are not moving near thespeed of light. Inquantum mechanicsa rigid body is usually thought of as a collection of point masses. For instance,in quantum mechanicsmolecules(consistingof the point masses: electrons and nuclei) are often seen as rigid bodies