A form of this quantity is the associated Noether (“NURR-turr”) current when the Lagrangian does not depend on a given coordinate. This quantity’s “conjugate” form equals the derivative of the Lagrangian with respect to generalized velocity (10[1])and is related to q and q-dot in Hamilton’s equations. Position and the generalized (10[1])form of this quantity are the usual coordinates of phase space. The square of this quantity’s (10[1])“linear” form divided by two times mass equals kinetic (10[2])energy. (10[2]-5[1])In the general statement (-5[2])of Newton’s (-5[1])third law, force (-5[1])equals the time derivative of this quantity, which is conserved in all collisions. For 10 points, name this (10[1])quantity equal to mass times velocity. ■END■ (10[4])