Inertia is the basic concept of physics that is explained using the concept of Mass. The inertial concept was first explained by Sir Isaac Newton and the Law of Inertia is explained as any object in a state of rest or in a state of motion always staying in its state of rest or motion until an external force is applied. We can define Inertia in physics as the property of the matter that is linked to the mass of the object. In this article, we will learn about, What is Inertia, What is Law of ... Law of inertia, postulate in physics that, if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force. This law is also the first of Isaac Newton’s three laws of motion. Newton’s laws of motion are three statements describing the physical relations between the forces acting on a body and the motion of the body. Isaac Newton developed his three laws in order to explain why planetary orbits are ellipses rather than circles, but it turned out that he explained much more. The law of inertia states that an object remains in either a state of rest or motion unless an external force acts on it.
