On a conveyor belt moving with a speed u, sand falls at a constant rate (\frac{d m}{d t}), where m is the mass of sand. The extra force required to maintain the speed of the belt is

KEAM 2021 Physics and Chemistry Solved Paper

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On a conveyor belt moving with a speed u, sand falls at a constant rate (

), where m is the mass of sand. The extra force required to maintain the speed of the belt is

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