Consider the speed control system shown in the figure wherein the inner loop corresponds to motor back e.m.f, the controller is an integrator with gain K observes that the load is inertia only. What is the value of K for which steady-state error to unit ramp input $$\left( {{V_r}\left( s \right) = \frac{1}{{{s^2}}}} \right)$$   is less than 0.01 rad/sec?