A water container is kept on a weighing balance. Water from a tap is falling vertically into the container with a volume flow rate of ‘Q’; the velocity of the water when it hits the water surface is ‘U’. At a particular instant of time the total mass of the container and water is ‘m’. The force registered by the weighing balance at this instant of time is
(a) mg + $\rho$QU (b) mg + 2$\rho$QU (c) mg + $\rho$QU2/2 (d) $\rho$QU2/2