It was pointed out to me once that in the SI system of units the kilogram is a unit of mass while the unit of weight is the newton. In the British system the pound is a unit of weight.
Donald G. Shead wrote in message <01bf90db$8623e480$161c3ccc@default>... >It's so simple; I don't think I've said it before? > >Masses are physically existent objects, and/or bodies of material matter. > >Weights are physical thrusts, of masses upon the ground, and/or other >supports; such as weighing scales. >-- >Donald G. Shead >Such a tangled web we weaved when first we practiced to perceive.