1.

A man whose mass is 70 kg walks up 10 steps each 0.2m high in 5 second. Find the power he develops.

Answer»

mass of man=70 Kgg=10f=mg=700N1 step = 20cm10 steps= 200cm=2mh=2mw= mghw= 700*2=1400Jt=5secp=w/tp=1400/5=280Watt



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