text: The partial derivative of the Lagrangian with respect to the time derivative of a generalized coordinate gives a generalized version of this quantity.
full_question: The partial derivative of the Lagrangian with respect to the time derivative of a generalized coordinate gives a generalized version of this quantity. This quantity's quantum mechanical operator is h-bar over i times del. This quantity is typically plotted with position in phase space since it is conjugate to position. Unlike kinetic energy, this quantity is conserved in inelastic collisions. Newton's second law more formally states that force is equal to the time derivative of this quantity. The change in this quantity is known as impulse. For 10 points, name this quantity, commonly symbolized p, which is equal to the product of mass and velocity.
first_sentence: The partial derivative of the Lagrangian with respect to the time derivative of a generalized coordinate gives a generalized version of this quantity.
raw_answer: linear momentum [do not accept "angular momentum"]