Question

a man weighing 48kg carries a bag of 2kg he climbs to the top of a building 100m tall in 5min calculate the work done by the man and his power

Answer 1

hope this helps you....

Answer 2

The work done by the man and his power is 49 kJ and 163.354 watts respectively.

Explanation:

Given that,

Mass of the man is 48 kg and the mass of the bag that he carries on his head is 2 kg.

Height of the building, h = 100 m

Time taken, t = 5 min = 300 s

When an object climbs to a certain height, the work done him is given by :

$W=mgh$

$W=(48+2)\times 9.8\times 100$

W = 49000 Joules

or

W = 49 kJ

The work done divided by time is called its power. It is given by :

$P=\dfrac{49000}{300}$

P = 163.354 watts

So, the work done by the man and his power is 49 kJ and 163.354 watts respectively.

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