How To Find Velocity With Deceleration. To find the percentage of deceleration, simply input final speed, initial speed, and time. How do you calculate deceleration rate?
Where, v = final velocity, u = initial velocity, t = time taken, s = distance covered. The formula for acceleration can be used here, with a negative sign, to identify the deceleration value. For gradual deceleration you use either linear or quadratic friction.
