posted by anna on .
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