A person carries a mass of 10 kg and walks along the +x-axis for a distance of 100m with a constant velocity of 2 m/s. What is the work done by this person?
None of the other choices is correct.
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The conservation of energy principle states that the final energy (Ef) of a system must be equal the initial energy (Ei) of the system plus any work (W) done on the system.
Ef = Ei + ...
The solution fines the work done by a person carrying a mass of 10 kg for 100m with a constant velocity of 2 m/s.