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Uniform and Non- uniform Speed

Physics

definition

Uniform motion

A body is said to be in uniform motion if its velocity does not change with time. For a body in uniform motion, net external force is always equal to zero. An example of uniform motion is a body sliding on a frictionless surface with a constant velocity. 

definition

Non-uniform Motion

A body is said to have non-uniform motion if its velocity changes with time. Such a body is necessarily under the influence of an external force. An example of non-uniform motion is a body rotating at a constant speed. Its velocity is not constant because its direction of motion changes every instant. 

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Difference between uniform and non-uniform motion

Uniform MotionNon-Uniform Motion
When an object travels equal distance in equal interval of time .When an object travels unequal distance in equal interval of time. 
For example : If a car covers equal distance of 500m in the interval of 2 minutes.For example : Motion of car on a crowded road when it covers unequal distance in equal interval of time.

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