Question

A man carries a load of 50 kg through a height of 40 m in 25 sec .If the power of man is 1568 W ,his mass is

Answer 1

Brainly.in

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amitsmarty909

Secondary SchoolPhysics 13+7 pts

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

Comments (1) Report by Edwerd5938 20.07.2018

siril

do u want the mass or the power

Answers

smrithi1235

Smrithi1235 Ambitious

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.