When you have to increase the potential energy of an object then

You have to do positive work against gravity

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gravity has to do positive work against you

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Gravity should not do work

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Positive work has to be done against you

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Solution

The correct option is A You have to do positive work against gravity
Work done by internal conservative forces = - $Δ$ P.E, so if work done by gravity is negative, then potential energy increases

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When you have to increase the potential energy of an object then

The correct option is A You have to do positive work against gravityWork done by internal conservative forces = - Δ P.E, so if work done by gravity is negative, then potential energy increases

The correct option is A You have to do positive work against gravity
Work done by internal conservative forces = - $Δ$ P.E, so if work done by gravity is negative, then potential energy increases