For 10 points, name this location with respect to which moment of inertia is calculated, representing the weighted mean of the positions of a collection of objects.
Its relative displacement governs the height a pole vaulter or high jumper can clear. For a system with internal forces that obey Newton's third law, it always moves at constant velocity; Newton's second law can be written in analogous form with respect to the acceleration of this quantity. For 10 points, name this location with respect to which moment of inertia is calculated, representing the weighted mean of the positions of a collection of objects.
Its relative displacement governs the height a pole vaulter or high jumper can clear.
{center of mass} [accept {center of gravity} before “Newton's second law” is read]