Unlike kinetic energy, this quantity is conserved in inelastic collisions.
The conservation of this quantity is a consequence of translational invariance according to Noether's theorem. For a particle, the de Broglie wavelength equals the Planck constant divided by this quantity. According to a principle named for Heisenberg, the accurate measurement of position produces uncertainties in the measurement of this quantity. Newton's second law can alternatively be written as force equals the change in this quantity divided by the change in time. Unlike kinetic energy, this quantity is conserved in inelastic collisions. For 10 points, name this vector quantity symbolized by a lowercase p that is equal to an object's mass and velocity.
The conservation of this quantity is a consequence of translational invariance according to Noether's theorem.
linear momentum [do NOT accept "angular momentum"] 