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:

 Units English Metric $$\large{ s }$$ = displacement $$\large{ft}$$ $$\large{m}$$ $$\large{a}$$ = acceleration $$\large{\frac{ft}{sec^2}}$$ $$\large{\frac{m}{s^2}}$$ $$\large{t}$$ = time $$\large{sec}$$ $$\large{s}$$ $$\large{v_f}$$ = final velocity $$\large{\frac{ft}{sec}}$$ $$\large{\frac{m}{s}}$$ $$\large{v_i}$$ = initial velocity $$\large{\frac{ft}{sec}}$$ $$\large{\frac{m}{s}}$$