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” (10[1])form equals the derivative of the Lagrangian (10[1])with respect to generalized velocity and is related to q and q-dot in Hamilton’s equations. Position and the generalized form of this quantity are the (10[1])usual coordinates of phase space. The square of this quantity’s “linear” form divided by two times mass (-5[1])equals kinetic energy. In the general statement of (-5[1])Newton’s (-5[1])third law, (-5[1])force equals the time derivative (0[1]-5[1])of this quantity, (-5[1])which is conserved in all collisions. For 10 points, (10[1])name (10[1])this quantity equal to mass times velocity. ■END■ (10[3]0[4])