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Posted by on Wednesday, January 5, 2011 at 5:33pm.

A rope goes over a circular pulley with a radius of 6.3 cm. If the pulley makes four revolutions without the rope slipping, what length of rope passes over the pulley?

  • physics - , Wednesday, January 5, 2011 at 5:56pm

    Four pulley circumferences
    = 4 * (2 pi R) = 8 pi R

    Plug in the numbers.

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