What is inertia

Answer 1

Inertia is the tendency of an object at rest to remain at rest or an object in motion to remain in motion in a straight line at a constant speed, unless acted upon by an external force. It is a property of matter and can be understood through Newton’s first law of motion, often referred to as the law of inertia. Inertia is directly related to an object’s mass, with heavier objects having greater inertia.