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AS - Physics (mechanics) Hard Question (i think) Im really struggling with it

Marshall1999

A container rests on a top pan balance, which measures mass in kg. a funnel above the container holds some sand. The sand falls at a constant rate of 0.300 kg s-1 into the container, having fallen through an average vertical height of 1.60m.
(i) Show how the velocity of the sand as it lands in the container is 5.6 ms-1.
(ii) Calculate the magnitude of the momentum of the sand that lands in the container in each second.