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Re: [Phys-l] Collision of irregular bodies



The tangent plane to a surface at a point is determined by the
equation of that surface. When two surfaces meet at a point is it
necessary for their two tangent planes to become congruent.

regards,
Sarma.

On 11 Aug 2006, at 15:01, Bob LaMontagne wrote:

If "smooth" means frictionless, then the action reaction pair is
perpendicular to the plane of contact.

Bob at PC