Understanding Uniform and Non-Uniform Motion

Physics

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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. 

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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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Uniform v/s Non-uniform motion

S.No.Uniform MotionNon-Uniform motion
1.Velocity is constant with time.Velocity changes atleast once in the given interval of time.
2.External force is zero.External force is non-zero.
3. Ideal scenario.Realistic scenario.
4.Ex: Body moving on a frictionless tableEx: Body under freefall

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