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During a heavy rain, hailstones of average size 1.0 cm in diameter fall with an average speed of 20 misSuppose 2000 hailstones strike every square meter of a 10 m x 10 m roof perpendicularly in onesecond and assume that the hailstones do not rebound. Calculate the average torce exerted by thefalling hailstones on the roof. Density of hailstones is 900 ka/m3 take (n 3.14)E-3.

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