1.

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?

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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