Question

What do u mean by inertia?

Answer 1

Inertia is the inability of an object to change by itself its state of rest,motion and direction.

There are 3 types of inetia:
1) Inertia of rest
2) Inetia of motion
3) Inetia of direction

Answer 2

The tendency of every body to oppose the change in its state(state of motion or state of rest) or to oppose acceleration is know as inertia
the concept of inertia came from newtons first law of motion
for example if we push a body is continues to to move in a straightt line this is because of inertia of the body
Hope this helped u :-)