# What is the difference uniform and constant velocity ?Is acceleration zero in case of both constant and uniform velocity?

Refer to the explanation below.

UNIFORM VELOCITY: when an object is moving in a straight line, without any acceleration. No change in speed or direction is experienced.

CONSTANT VELOCITY: when the speed of an object has not changed even though the object may have experienced a change in direction (zero acceleration).

To answer the second half of your question: Yes, acceleration is zero for both uniform and constant velocity based upon these two definitions.

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There is no difference between the two expressions.

And it follows that the acceleration is zero.

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