1.

A man carries a load of 50 kg through a height of 40m in 25 sec then what is mass

Answer»

Take mass of MAN as 'M'.

Assuming all energy is used to do WORK, USE G.P.E = mgh.

Potential energy = (M+50) x 9.8 x 40

So G.P.E = 392M +19600

Other EQUATION; Power = W/t

P = (392M + 19600)/25

so,

1568 x 25 = 392M + 19600

392M = 39200 - 19600

Mass 'M' = 19600/392 = 50KG.



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