# Deceleration

Written by Jerry Ratzlaff on . Posted in Fluid Dynamics

Deceleration, abbreviated as d, is the rate of change of velocity, this is the opposite of acceleration.

### Deceleration FORMULA

(Eq. 1)  $$\large{ d = \frac {\Delta v} {t} }$$

(Eq. 2)  $$\large{ d = \frac {v_f \;-\; v_i} {t} }$$

Where:

$$\large{ d }$$ = deceleration

$$\large{ \Delta v }$$ = velocity differential

$$\large{ v_f }$$ = final velocity

$$\large{ v_i }$$ = initial velocity

$$\large{ t }$$ = time in which the change occures