Inertia

Inertia Newtons' first law of motion is also known as the law of inertia, which states that any object in a state of rest or of uniform linear motion tends to remain in such a state unless acted upon by an unbalanced external force. In effect, this is a definition of equilibrium; the branch of physics that treats equilibrium situations is statics. The tendency for matter to maintain its state of motion is known as inertia. The inertia of a body is its tendency to resist acceleration, or change in its velocity. The mass of a body is a quantitative measure of its inertia. Thus, a very massive object, such as a steamship, requires a significant force acting for considerable time in order to bring it either to a stop or up to speed, whereas a relatively light object, such as a table-tennis ball, requires little effort to change its velocity. A rotating body has the same tendency to maintain its state of rotational motion that a body moving in a straight line has to maintain its linear motion. The moment of inertia is a measure of a body's resistance to changes in rotation rate. Specifically, inertia, acceleration, object, motion, mass, body, state, moment, linear, force, angular, tendency, same, relationship, maintain, equation, velocity, torque, time, thus, through, requires, related, plane, objects, measure, law, known, equilibrium, distribution, cylinder, change, between, axis