Answer to Question #38731 in Mechanics | Relativity for truey trey

Question #38731
hailstones with an average mass of 4g fall vertically and strike a flat roof at 12 metres per second .In period of 5 minutes six thousand hailstones fall on each square metre of roof and rebound vertically at 3 metres per second. Calculate the force on the roof if it has an area of 30 square metres.
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