Q. 185.0( 5 Votes )

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

Answer :

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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