Question

why newton first law of motion called the law of inertia

Answer 1

Hi! Visha,

Inertia is the property of a body to oppose any change in the state of the body. Newton’s first law states that every body continues to be in its state of rest or of uniform motion in a straight line unless compelled by some external force. Newton’s first law is known as law of inertia because,

if the external force is zero, the body at rest continues in its rest state and a body in motion continues to move with a uniform velocity.

Cheers!!