Gc (engineering)
In engineering and physics, gc is a unit conversion factor used to convert mass to force or vice versa. It is defined as
In unit systems where force is a derived unit, like in SI units, gc is equal to 1. In unit systems where force is a primary unit, like in English units, gc is not equal to 1, and is required to obtain correct results.Motivations
According to Newton's law of motion, the force F is proportional to the product of mass m and acceleration a:
or
If F = 1 lbf, m = 1 lb, and a =, then
Leading to
gc is defined as the reciprocal of the constant K
or equivalently, as
