Rigid Body

A rigid body is an ideal solid object where the distance between two points stay completely the same, even when you push or pull on it. It does not change shape under force.

In order to simplify simulations of physics-based behaviour (such as movement, gravity, collisions, etc) we treat objects as rigid bodies allowing us to ignore their potential deformation. We use a rigid body model when we care about the size and shape of the object.

True Rigid Bodies

Rigid bodies is a theoretical assumption, in reality, there is no such thing as a true rigid body as all objects experience deformation.

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