Acceleration is the rate of change of velocity of an object. Thus when the velocity ( direction or magnitude) of an object changes, we say that the particle is accelerating. Mathematically it is written as
a=
The units of acceleration are m/s²
Acceleration can be positive or negative. If the velocity of an object increases, we call that as positive acceleration and if the velocity of an object decreases, we call that as the negative acceleration.
Acceleration is a change in velocity over time. Acceleration can be either an increase of a decrease. Negative acceleration is sometimes called deceleration.
