Law of inertia class 9 science chapter Motion
The Law of Inertia, also known as Newton’s First Law of Motion, is a fundamental principle in physics. It states:
“An object try to remain in its initial state until external force is applied.” Inertia refers to the tendency of an object to resist changes in its state of motion. Objects at rest stay at rest, and objects in motion keep moving at a constant velocity unless a force (like friction, gravity, or a push) causes a change.