The Sears tower in Chicago is 1450ft tall from street level to thetop of the roo

Question

The Sears tower in Chicago is 1450ft tall from street level to thetop of the roof. There are 88 stories in the tower. The distance tothe highest occupied floor is 1431 feet. What is the gravitationalPE of a 1561.7 kg elevator that stops at the highest occupiedfloor?
Express your result in JOULES. Furthermore, if the cable tothe elevator were to break, use energy techniques to determine thespeed of the elevator the instant it strikes the ground (assumestreet level)?
Express your result in m/s and in mi/hr.
Needed urgently !
Express your result in JOULES. Furthermore, if the cable tothe elevator were to break, use energy techniques to determine thespeed of the elevator the instant it strikes the ground (assumestreet level)?
Express your result in m/s and in mi/hr.
Needed urgently !

Explanation / Answer

Express your result in JOULES.


Furthermore, if the cable to the elevator were to break, useenergy techniques to determine the speed of the elevator theinstant it strikes the ground (assume street level)?
v=2gh=19.6*436.1688=92.46m/sec=206.82m/h

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