|inertia (ɪnˈɜːʃə, -ʃɪə)|
|1.||the state of being inert; disinclination to move or act|
|a. the tendency of a body to preserve its state of rest or uniform motion unless acted upon by an external force|
|b. an analogous property of other physical quantities that resist change: thermal inertia|
inertia in·er·tia (ĭ-nûr'shə)
|inertia (ĭ-nûr'shə) Pronunciation Key
The resistance of a body to changes in its momentum. Because of inertia, a body at rest remains at rest, and a body in motion continues moving in a straight line and at a constant speed, unless a force is applied to it. Mass can be considered a measure of a body's inertia. See more at Newton's laws of motion, See also mass.