Inertia is the resistance of a physical object to change in its velocity. Inertia may also refer to: Science Moment of inertia, the resistance to angular acceleration Second moment of area, a geometrical property of a body that determines its resistance to bending Thermal inertia or effusivity, the resistance of an object or body to temperature change in response to heat input Sylvester's law of inertia, a theorem in matrix algebra Sleep inertia, a psychological state Climate inertia, a slowness of the Earth system to changes in significant factors such as greenhouse gas levels Ecological inertia, the ability of a living system to resist external fluctuations Social science Cognitive inertia, resistance to change in an individual's beliefs Psychological inertia, a tendency to favor omission over commission due to a lack of incentive to act Psychical inertia, a term introduced by Carl Jung Social inertia, description of a person's resistance to change in psychology and sociology Corporate inertia or unwillingness to change, a diseconomy of scale in microeconomics Arts and entertainment Inertia (film), a 2001 Canadian drama Inertia (Marvel Comics), a fictional hero Inertia (DC Comics), a fictional antagonist "Inertia" (short story), a story by Nancy Kress Music Inertia, an Irish DJ duo, the pairing of John O'Callaghan and Neal Scarborough Inertia (The Exies album), an album by The Exies Inertia (Derek Sherinian album), an album by Derek Sherinian "Inertia", a song by Bruce Dickinson from the album Skunkworks "Inertia", a song by The Wonder Stuff from the album Never Loved Elvis "Inertia", a 2016 song by 20syl “Inertia”, a song by Britpop band Blur, from their debut album Leisure