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2 metres high person is holding a 25 kgs trunk on his head and is standing at the roadway bustermines. how much work done by the person

No work except of lifting the weight in air for 2meter


The Brainliest Answer!
Work done here is zero since there is no displacement done by the man nor change in energy.Even if the man would move the work done would be zero since the displacement would be perpendicular to the the force (the weight of the box acting downwards due to gravity..)
Work done is a scalar product of force and disp. :-
W=F.∆s= Fdscos(90) =0.
(where ∆s is displacement)
1 5 1
Work done by the person is zero
0 0 0
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