When objects with no STR (such as cars) make moving attacks, use their Mass (in terms of the STR required to lift them) x1 instead of STR in the formulas.
(When objects with no STR (such as cars; make; moving attacks) (When objects with no STR (such as cars; use; their Mass)
When objects with no STR (such as cars When objects with no STR (such as cars
make use
moving attacks
their Mass