Velocity & General Plane Motion
Plane motion = Translation with A + Rotation about A
The most general plane motion of a rigid slab can be considered as the sum of a translation and a rotation. The slab shown can be assumed to translate with point A, while simultaneously rotating about A. It follows that the velocity of any point B of the slab can be expressed as
where vA is the velocity of A and vB/A is the relative velocity of B with respect to A.