Degrees of Freedom

Degrees of Freedom

An unconstrained rigid body moving in space can describe the following independent motion:

a. Translational motion along any three mutually perpendicular axes x, y and z.

b. Rotational motion about these axes

Degrees of Freedom
Degrees of Freedom



A rigid body possesses six degrees of freedom.

Degrees of freedom of a pair is defined as the number of independent relative motions, both translational and rotational, a pair can have.

DOF = 6 – Number of Restraints

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