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A man of mass 50 kg clikmbs up 20 steps...

A man of mass 50 kg clikmbs up 20 steps of a staircase in 5s . Each step is 30 cm high. Find the power applied by the man .

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Height of 20 steps =`20xx 30 =600 cm =6m`
`therefore` Work done =`50xx9.8xx6 =2940 J`
`" "[ as m =50 kg, g=9.8 m*s^(-2)]`
`therefore` power = `(2940)/(5) J*s^(-1) =588W.`
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