Definition that contains law of motion
- inertial mass (physics) the mass of a body as determined by the second law of motion from the acceleration of the body when it is subjected to a force that is not due to gravity
- inertial reference frame a coordinate system in which Newton's first law of motion is valid
- coriolis force (physics) a force due to the earth's rotation; acts on a body in motion (airplane or projectile) in a rotating reference frame; in a rotating frame of reference Newton's second law of motion can be made to apply if in addition to the real forces acting on a body a Coriolis force and a centrifugal force are introduced
- inertial frame a coordinate system in which Newton's first law of motion is valid