A traveler at an airport takes an escalator up one floor . The moving staircase would itself carry him upward with vertical velocity component v between entry and exit points separated by height h. However, while the escalator is moving, the hurried traveler climbs the steps of the escalator at a rate of nsteps/s. Assume that the height of each step is h_s .

(a) Determine the amount of chemical energy converted into mechanical energy by the traveler's leg muscles during his escalator ride, given that his mass is m.

energy=_________

( b ) Determine the work the escalator motor does on this person.

work=_________