By definition,

**acceleration**means change in**velocity**. So if the**velocity**is**constant**, this means both speed and direction are**constant**. And there has to be at least one of these things changing for the**velocity**to change, the**acceleration**is zero if none of these things change and the**velocity**is said to be**constant**.Correspondingly, what is the acceleration is constant mean?

The

**Meaning**of**Constant Acceleration**. Sometimes an**accelerating**object will change its velocity by the same amount each second. As mentioned in the previous paragraph, the data table above show an object changing its velocity by 10 m/s in each consecutive second.Can an object be accelerating if it is moving with constant speed?

An

**object can accelerate**while traveling at**constant speed**but not at**constant velocity**. This is because**acceleration**is a measure of the change in**velocity**over time.**Speed**is a scalar quantity with magnitude but not direction while**velocity**is a vector quantity with both magnitude and direction.