Part A How much work does the up escalator do on you when you ride it from the l

Question

Part A

How much work does the up escalator do on you when you ride it from the lower level to the upper level?

Part B

How much work does the down escalator do on you when you ride it from the upper level to the lower level?

An escalator carries you from one level to the next in an airport terminal. The upper level is 4.7 mabove the lower level, and the length of the escalator is 7.6 m . Assume that your mass is 64 kg .

You may want to review ( pages 289 - 292) .

Part A

How much work does the up escalator do on you when you ride it from the lower level to the upper level?

Part B

How much work does the down escalator do on you when you ride it from the upper level to the lower level?

Explanation / Answer

here,

mass , m = 64 kg

height , h = 4.7 m

a)

the work done by the up escalator when you ride it from the lower level to the upper level , Wu = m * g * h

Wu = 64 * 9.81 * 4.7 J

Wu = 2950.8 J

b)

the work done by the down escalator when you ride it from the upper level to the lower level , Wl = - m * g * h

Wl = - 64 * 9.81 * 4.7 J

Wl = - 2950.8 J

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