When the relation between the controlling force (Fc) and radius of rotation (r) for a spring controlled governor is Fc = ar + b, then the governor will be
(a) stable
(b) unstable
(c) isochronous
(d) none of the mentioned
I had been asked this question by my school teacher while I was bunking the class.
My query is from Hartung Governor topic in chapter Governors of Machine Dynamics