5. summary and conclusion
we have shown how , by treating F=ma as a physical law and by using the physical law that the weight W is proportionnal to the inertial mass m, one can , with accurate balance scale measurements of relative weight , obtain a new syandard of force , distance, or time , according to which is the least accurately measureable of the three. Presently, force is the least accurately measurable of these quantities, leading to the use of distance-mass-time units rather than distance-force-time units.
These possibilities occur when the measurements appropriate to a physical law, and the physical law itself , are more accurately true than the measurements