Question

what is inertia, static inertia

Answer 1

Inertia is the inability of an object to change its state its own. Inertia are of three types
1)Inertia of rest 
2)Inertia of motion
3)Inertia of direction
Static inertia refers to the inertia of a body at rest.For example,the inertia of a book on a table is static inertia.

Answer 2

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☯Inertia is a resistance to any object to change its position or the tendency of any object to remain jn its actual position of rest or motion.

☯The change may be in speed , position etc.

☢STATIC INERTIA REFERS TO THE INERTIA OF REST

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