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 water container is kept on a weighing balance. Water from a tap is f

1.	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 + QU
B.	mg + 2 QU
C.	mg + QU /2
D.	QU /2
Answer» B. mg + 2 QU

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