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What happens to the potential energy that an elevator looses in coming down from top of building to the ground?

What happens to the potential energy that an elevator looses in coming down from top of building to the ground? 

Grade:12th pass

2 Answers

Arun
25750 Points
4 years ago
An elevator descends from the top of a building to a stop at the ground.The potential energy (E) of the elevator is defined as,E = mgyWhere m is the mass of the elevator, g is the acceleration due to gravity of earth and y is the height of the elevator from the earth.The potential energy of the elevator at the top will be maximum since y is maximum at the top and at the ground will be zero since y is zero at the ground. The loss of potential energy of the elevator descends from the top of a building to a stop at the ground floor used in the mechanical work of the elevator when it comes from top to ground.
Khimraj
3007 Points
4 years ago
The potential energy of an object is:
where U  = mgh
is the potential energy of the object relative to its being on the Earth's surface, m is the mass of the object, g is the acceleration due to gravity, and h is the altitude of the object.
Hence, the potential difference is:
dU = mg*dh
According to this the potential energy of the elevator will decrease.

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