Question

What is inertia? explain please!

Answer 1

inertness, especially with regard to effort, motion, action, and the like; inactivity; sluggishness.

Answer 2

Inertia: Objects tend to move at the same speed and direction or, if at rest, stay at rest. A force has to be applied to overcome inertia. An objects inertia is determined by the mass of the object.