nns91 said:Homework Statement
A 1200kg elevator driven by an electric motor can safely carry a maximum load of 800kg. What is the power provided by the motor when the elevator ascends with a full load at a speed of 2.3 m/s
Homework Equations
P=F*v
The Attempt at a Solution
So I use directly P=F*v=(melevator+mpeople)*g*v
However I got the wrong answer. Does it involve any other formula here ?
The energy elevator problem, also known as the elevator paradox, is a thought experiment that explores the concept of energy conservation and the laws of thermodynamics. It involves a hypothetical scenario where an elevator is powered by a weight that is slowly descending, converting potential energy into kinetic energy. The question is, where does the energy go once the elevator reaches the ground floor?
The energy elevator problem challenges the first law of thermodynamics, which states that energy cannot be created or destroyed, only transferred or converted. In this scenario, it appears that energy is disappearing as the elevator reaches the ground floor.
The solution to the energy elevator problem lies in the fact that energy is not actually disappearing, but rather being transferred to other forms. As the elevator descends, the potential energy of the weight is converted into kinetic energy, which is then transferred to the surrounding air as heat and sound. This transfer of energy may not be easily observable, but it follows the laws of thermodynamics.
The energy elevator problem is a simplified thought experiment, but it can be applied to real-life situations such as energy production and consumption. It highlights the importance of understanding how energy is transferred and converted in various systems, and how energy conservation must be considered in these processes.
Yes, there are several other thought experiments that explore energy conservation, such as the "Maxwell's Demon" and the "Carnot Cycle". These experiments help us understand the fundamental principles of energy and how it behaves in different systems.