In SRT, Force (F) transforms identically to d(mV)/dt, which can in turn be transformed using the Lorentz transformations and the dependence of m upon speed. This raises the question whether Force in the force laws also transforms the same way among different reference frames. Certainly the Lorentz force does. But what about the other force laws (Hooke’s Law, Nuclear forces, gravitation, etc.)? Should it be a requirement that the force in every force law transform identically to d(mV)/dt? If so, does this suggest that we can learn something about the behavior of moving springs, etc.?