For which of the following forces can the work done increase or decrease the potential energy?

For both conservative and non-conservative forces.

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For conservative forces only.

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For non-conservative forces only.

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For neither conservative nor non- conservative forces.

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Solution

The correct option is B For conservative forces only.
In case of non-conservative forces, the work done is dissipated as heat or sound but it does not increase the potential energy. But in the case of conservative forces, work done is responsible for increasing or decreasing the potential energy.
Work done by conservative force $= - Δ U$

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Conservative and Non-Conservative Forces

Standard XII Physics

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