# Question: Equation of law

Is the following equation a physical law, kinematic relationship, or material law?

Ms = ∫v rdm

Here M =mass in volume V, dm = a mass element, r = position vector of dm, and s is the position of the mass center.

Ms = ∫v rdm

Here M =mass in volume V, dm = a mass element, r = position vector of dm, and s is the position of the mass center.

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