# Understanding Uniform and Non-Uniform Motion

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.

## definition

### Uniform v/s Non-uniform motion

 S.No. Uniform Motion Non-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 table Ex: Body under freefall