Inertia
1. Inertia is a property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is changed by an external force.
2. Inertia is the physical force that keeps something in the same position or moving in the same direction.
3. Inertia is the tendency of an object in motion to remain in motion or an object at rest to remain at rest unless acted upon by force. This concept was quantified in Newton's First Law of Motion.
Inertia is a passive property and does not enable a body to do anything except oppose such active agents as forces and torques. A moving body keeps moving not because of its inertia but only because of the absence of a force to slow it down, change its course, or speed it up.
There are two numerical measures of the inertia of a body: its mass, which governs its resistance to the action of a force, and its moment of inertia about a specified axis, which measures its resistance to the action of a torque about the same axis.
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Vedantu: Learn Live Online https://www.vedantu.com/physics/
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