# A man weighing 70 Kg carries a weight of 10 Kg to the top of tower 100 m high. Calculate the work done.

Given,

Mass of man = 70 kg

Weight carried = 10 kg

Height above ground h = 100 m

Work done =???

Total mass at top of tower = 70 + 10

M = 80 kg

For a body of mass m to raise to height h above earth,

Work done = potential energy stored

= M × g × h

Let g = 10 ms-2

So, work done will be = 80×10×100

= 80,000 J

= 80 KJ

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