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An escalator is moving downward with a uniform speed of u. A man of mass m is running upward on it at a uniform speed of v. If the height of the escalator is h, the work done by the man in going up the escalator is?

  • Science -

    W=FD where W is work, F is force, and D is displacement. Find F and you will be able to get work.

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    mgh

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