The negative rate of change of velocity is known as deceleration. Deceleration is the decrease in velocity of an object with respect to change in time. The unit of deceleration is meter per second square.

Deceleration = decrease in velocity / change in time

Deceleration = -dV/ dt

Deceleration is represented by a negative sign. The direction of the deceleration is opposite to the direction of motion of body.

Deceleration = decrease in velocity / change in time

Deceleration = -dV/ dt

Deceleration is represented by a negative sign. The direction of the deceleration is opposite to the direction of motion of body.