Concept of negative work done by friction.
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Give an example of a frictional force doing negative work. Explain how the friction does work in detail.
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The solution explains how the work done by the friction can be negative.
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Work done by the friction means that the work is being done against the friction and the applied force F is doing (positive) work to move body against friction.
Give an example of a frictional force doing negative work. Explain ...
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