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What is the work done by a man in carrying a suitcase weighing30 kg over his head, when he travels a distance of 10 m in(ù vertical and (i) horizontal directions? |
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Answer» i) W.D = FScos∅ = mg*h*cos(0) = 30*10*10 = 3000J ii) W.D = FScos∅ = mg*h*cos(90) = 0 |
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