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ap physics

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Karen has a mass of 48.2 kg as she rides
the up escalator at Woodley Park Station of
the Washington D.C. Metro. Karen rode a
distance of 65.7 m, the longest escalator in
the free world.
The acceleration of gravity is 9.8 m/s2 .
How much work did the escalator do on
Karen if it has an inclination of 32.9?
Answer in units of J

  • ap physics -

    m g h

    h = 65.7 sin 32.9

  • ap physics -

    Wt. = 48.2kg * 9.8N/kg = 452.8N.

    Fp = 452.8*sin32.9 = 245.95N = Force
    parallel to plane.

    W=Fp*d = 245.95 * 65.7 = 16159 Joules.

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