Is force measured on a force plate be taken as a persons balance.?

Answer 1

I think you mean 'weight' and it points up the common confusion that exists between 'force' exerted on a mass by gravitational acceleration, and 'weight' (which is actually another way of saying mass). When we say a person 'weighs' 90 kg, it means that they have a mass of 90 kg and they exert a force of F=ma=90*9.8=882 Newtons against the surface which is supporting them.

HTH

Doug