1. The problem statement, all variables and given/known data In a physics exam I have this question: "what is the momentum of the weight force of an object in a free fall relative to its center of mass?" 2. Relevant equations Is my answer right ? 3. The attempt at a solution My answer is: "If we try to calculate the momentum, the center of reduction coincides with the center of mass, and the line of action of the force passes through the center of reduction, so the momenut is canceled"