work is positive or negative explain
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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.
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work done by the gravitational force on the body is positive. ... Thus work done by the applied force which is lifting up the body is positive since the angle between the applied force and displacement is positive.
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