For the motion of an object in which the velocity changes in either magnitude (speed) or direction or both, you will have a new quantity known as acceleration which is a vector quantity. An object is accelerating when it speeds up, slows down (usually called deceleration) or changes direction.
Formula:
Acceleration is the rate of change of velocity at a given time interval. The unit for acceleration is m/s².
EXAMPLES
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. This is referred to as a constant acceleration since the velocity is changing by a constant amount each second. Learn more about Constant Acceleration
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