What is a rigid body?#
Part 1#
A rigid body is an object:
Answer Section#
For which the dimensions are irrelevant to the description of its motion or the action of forces upon it.
Whose dimensions are negligible.
Whose changes in shape are negligible compared with the overall dimensions of the body or with the changes in position of the body as a whole.
That is always at rest.
Attribution#
Problem is licensed under the CC-BY-NC-SA 4.0 license.