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March 29, 2017

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A simple pulley with the given
radius r used to lift heavy objects is positioned 10 feet above
ground level. Given that the pully rotates °, determine the height
to which the object is lifted.
(a) r  4 in.,   720°

  • sasas - ,

    2 ft

  • sasas - ,

    (a)r=4in, θ=720°

    720°(π/180°)
    =4π

    S=rθ
    S=(4in)(4π)
    S=16π
    S≈50.27in

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