inertial mass is the amount of matter in an object, the measure of the resistance an object has when a force pushes it.
They are the inertial power – rather than the counterfist of reform.
The delicate accelerometers and inertial guidance components did all the piloting until the second stage kicked us loose.
"You are, of course, aware of the problems inherent in the development of inertial systems," Marks began.
1713, introduced as a term in physics 17c. by German astronomer and physician Johann Kepler (1571-1630), from Latin inertia "unskillfulness, idleness," from iners (genitive inertis) "unskilled, inactive;" see inert. Used in Modern Latin by Newton (1687). Sense of "apathy" first recorded 1822.
inertia in·er·tia (ĭ-nûr'shə)
The tendency of a body to resist acceleration; the tendency of a body at rest to remain at rest or of a body in motion to stay in motion in a straight line unless acted on by an outside force.
Resistance or disinclination to motion, action, or change.
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.