Velocity Ratio (\( K = \frac{V_k}{V_f} \)):

Where:

• \( K \) is the velocity ratio.
• \( V_k \) is the average knife velocity, in m/s.
• \( V_f \) is the average forward velocity, in m/s.

Note: \( K \) typically falls between 1.3 and 1.4.