A man weighing 49 kg carries a bag of 2 kg . He climbs to the top of a building 100 m tall in 5 minute . Calculate the work done by the man and the power he develops .

Explanation

Given m = `49 + 2 =51` kg
h = 100 m , t = `5 xx 60 = 300` s
Work done = mgh = `51 xx 9.8 xx 100 = 4.998 xx 10^(4) J` .
Power developed = `("Work done")("time") = (4.998 xx 10^(4))/(300) = 166.6 W`