Using the accelleration constant (9,8 m/s2) in your formula gives you the string tension in kg in stead of Newtons, like this: Force in N (=kg*m/s2) divided by 9,8 m/s2 gives kg.
David > Acceleration (a constant that has been variously described to me, it happens > to match the 32 feet per second per second of gravity, but I think that is > likely a coincidence and the constant has to do with the normal pull by the > finger).
