A 88.0 kg man is riding an escalator in a shopping mall.?

Question

The escalator moves the man at a constant velocity from the ground level to the floor above, a vertical height of 4.80 m. What is the work done on the man by each of the following forces?
(a) the gravitational force

(b) the escalator







the last person who answered was wrong, please try and show work and answer. It woul dbe a big help

Answer 1

He gains potential energy equal to
m*g*h which is negative work by gravity and positive work by the escalator (assuming he stepped on and off the escalator at exactly the same speed as the escalator).

so gravity
-88*9.81*4.8
-4140 J

Escalator
88*9.81*4.8
4140 J

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