posted by Mike .
Karen has a mass of 52.7 kg as she rides
the up escalator at Woodley Park Station of the Washington D.C. Metro. Karen rode a
distance of 57.5 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 26.7?
Answer in units of J
Work = Vertical Rise*Weight
= 57.5*sin26.7*M*g = ?