What is Uniform Velocity?

Uniform Velocity: A particle is said to move with uniform velocity if it moves along a fixed direction and covers equal displacements in equal intervals of time, however small these intervals of time may be.

In a displacement-time graph, (Fig) the slope is constant at all the points when the particle moves with uniform velocity.

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Non-uniform or variable velocity

The velocity is variable (non-uniform), if it covers unequal displacements in equal intervals of time or if the direction of motion changes or if both the rate of motion and the direction change.

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