# Kinematic Equations

Written by Jerry Ratzlaff on . Posted in Classical Mechanics

Kinematics formulas are about objects in motion and their interrelationship.  These formulas are only accurate if acceleration is constant during a time interval and it assumes all variables are in the same direction.

## Kinematic Equations formulas

 $$\large{ d = v_i \; t + \frac {1} {2} \; a \; t^2 }$$ $$\large{ \frac {v_i \;+\; v_f} {2} = \frac {d} {t} }$$ $$\large{ a = \frac {v_f \;-\; v_i} {t} }$$ $$\large{ {v_f}^2 = {v_i}^2 + 2 \; a \; d }$$

### Where:

$$\large{d}$$ = displacement

$$\large{a}$$ = acceleration

$$\large{t}$$ = time

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

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