a. At the airport, you ride a \"moving sidewalk\" that carries you horizontally

Question

a. At the airport, you ride a "moving sidewalk" that carries you horizontally for 25 m at 0.70 m/s before stepping onto the moving sidewalk and continue at 0.70 m/s afterward, how much work does the moving sidewalk do on you?

(answer=0J)

b. An escalator carries you from one level to the next in the airport terminal. The upper level is 4.5 m above the lower level, and the length of the escalator is 7.0 m. How much work does the up escalator do on you when you ride it from the lower level to the upper level?

(answer=2.6 KJ)

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

(answer= -2.6 KJ)

Explanation / Answer

aanswer may vary due to changes in values but the logic stands 1. In this case there is no change in potential energy or in kinetic energy so no work. 2. W= M g h = 62 kg *9.80 m/s^2 *4.6m= 2795J = 2800 J (sig. figures) 3. W = -2800 J

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