Projectile Energy

The total energy of the projectile is the sum of its speed energy (kinetic energy) and its rotational energy.

Kinetic energy: $$E_{kin} = \tfrac{1}{2} \cdot m \cdot v ^2$$

Rotational energy: $$E_{rot} = \tfrac{1}{2} \cdot J \cdot \omega ^2$$

Example calculation:

Kinetic energy: A common 4,5mm (.177) pellet (RWS Meisterkugeln 0,53g) is measured at a speed of 175m/s. The kinetic energy is 0.5*(0.53/1000)*175$$E_{kin} = \tfrac{1}{2} \cdot (0,53 / 1000) \cdot 175 ^2 = 8,1 Joule$$

Rotational energy: