A porter lifts a luggage of 15 kg from the ground and puts it on his head 1.5 m above the ground. Calculate the work done by him on the luggage.
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22.5 kg/m work done be done
aryan1624:
just wanted to ask why wouldn't the work done be zero as the work is done against gravity at an angle of 90°
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Answer:
The work done by porter on the luggage is 225 J
Explanation:
Given,
A porter lifts a luggage of mass = 15 kg from the ground.
It's on his head 1.5 m above the ground.
To find: The work done by him on the luggage
Solution:
here, Force is due to the weight of the luggage.
i.e F = mg , where m = mass of luggage and g = accerleration due to gravity
or, F = 15 * 10 = 150 N
Work done can be given as:
W = F * s
where, F = force and s = displacement i.e 1.5 m
W = 150 * 1.5 = 225 J
Therefore, The work done by porter on the luggage is 225 J.
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