Question

example when work done on object is negative​

Answer 1

A person walking down the stairs with load on its head, the work done is negative as the force applied on the load is in opposite direction to its displacement

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Answer 2

Answer:

Work can be either positive or negative: if the force has a component in the same direction as the displacement of the object, the force is doing positive work. If the force has a component in the direction opposite to the displacement, the force does negative work.