Willis Tower Elevator

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In Chicago, the Willis Tower (known as the Sears Tower before 2009) has 108 floors, rising to a height of 442 m. Its main elevator, with a mean speed of 8.13 m/s, needs 54.4 seconds to reach the top floor. Assuming it weighs kg, the work done is calculated as a function of time. This corresponds to a power equal to kW.

Contributed by: Enrique Zeleny (March 2011)
Open content licensed under CC BY-NC-SA




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