Gravity force on Physics constraint is not = M*9.8 ???

Hi there, it’s strange. I have a simpliest blueprint with a sphere with mass =10Kg hangs using physics constraint with standard g=9.8 and produces >120N instead of 98N.

Constraint:
just simple -no motors, nothing:

Testing BP:

Result:
изображение

Why???

Sofar based on experiments I fugured out that Constraint Force doesn’t depend on Mass.
with damping 0.01 Fconstraint = Fapplied * 0.012
with damping 1 Fconstraint = Fapplied * 0.016
approx. so