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physics help pleease!!

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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?

how can i find distance if the only variable given is radius and revolutions?

  • physics help pleease!! -

    Arc length = radius * angle (in radians)

    In this case, arc length equals length of rope, so

    L = r*θ = 6.3*4(2π)

    Can you take it from here?

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