# 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 FORMULA

$$d = v_i t + \frac {1} {2} at^2$$

$$\frac {v_i + v_f} {2} = \frac {d} {t}$$

$$a = \frac {v_f - v_i} {t}$$

$${v_f}^2 = {v_i}^2 + 2ad$$

Where:

$$d$$ = displacement

$$a$$ = acceleration

$$t$$ = time

$$v_f$$ = final velocity

$$v_i$$ = initial velocity