The effect of centrifugal force on heat transport underlies many buoyancy-driven natural convection flows that encounter a rotational shear. In the present study, direct numerical simulation of such a flow is studied using a rotating lid Rayleigh Benard convection (RBC) system under varying rotational Reynolds number (Re) and Rayleigh number (Ra). We observe that the rotating lid RBC exhibits two different regimes of operations, the rotation dominated, and the convection dominated. The scaling of heat transfer is determined for five orders of Ra (2 ×10³ to 2 ×10⁷) with Re ranging from 300 to 3000. Two different scaling exponents for heat transfer are identified in a modified (Nu -Ra) plot, with a shallower curve in the rotational dominated regime, and a steeper curve in the convection dominated regime. The change in exponent between the two regimes is accompanied by a change in flow morphology from a centrifugal type to a large scale circulation. The two regimes are identified with two different mechanisms of heat transfer depending on the balance between buoyancy and centrifugal forces.