Question

what is inertia??????????????

Answer 1

Inertia is the inability of a body to change its position on its own without any external force acting on it.
Inertia is of three types they are
Inertia of rest 
Inertia of motion 
Inertia of direction
mass is the measure of ineritia

Answer 2

a tendency to do nothing or to remain unchanged."the bureaucratic inertia of the various tiers of government"synonyms:inactivity, inaction, inactiveness, inertness, passivity, apathy, accidie, malaise,stagnation, dullness, enervation, sluggishness, lethargy, languor, languidness,listlessness, torpor, torpidity, idleness, indolence, laziness, sloth, slothfulnessa property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is changed by an external force."the power required to overcome friction and the inertia of the moving parts"
hope it helps u