gil

The correct formula for KINETIC energy is NOT Velocity x Mass but rather (Velocity)SQUARED x Mass. Thus, increasing club head speed (even a little) increases kinetic energy DRAMATICALLY whereas small increases in mass result in small increases in energy. It is for this reason, for example, that the M-16 bullet is SMALL and LIGHT yet because of high velocity, very lethal. The problem is that, I suspect, most amateur golfers cannot increase club weight without sacrificing club head speed to even a very small degree which is, because of the physics, very detrimental to the amount of kinetic energy which can be imparted to the ball by the club. To increase kinetic energy, an increase in club head speed (velocity) is ALWAYS preferred over an increase in Mass (club weight). GFS