An airport terminal. The upper level is 4.5 m above the lower level, and the length...
Homework Answers
by the energy coservation law work done by escalator on you = mgh
where m is mass
g is garvity
h is height from lower level to upper level
so in first part
in work done the up escalator do on you = +mgh = 66*9.8*4.5= 2910.6J
in second part
escalator going down mean work don on escaltor so work done is negative = -mgh=-66*9.8*4.5= -2910.6J
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