# Energy extraction help requested

• zydubion1
In summary, the conversation discusses the possibility of extracting usable energy from a mechanism that has force but no movement. It is concluded that this is not possible as energy cannot be created from force without displacement. However, it is suggested that small displacements, such as 0.25mm, can potentially be used to extract energy through methods like piezoelectricity or using a lever.

#### zydubion1

My basic question is this. Can usable energy be extracted from a mechanism that has force only, no movement. Here is an example. You press a hard cover book against a wall. You now lean into the book thus there is static force against the wall. There is no movement, just force. This happens over and over, you release the force and re-apply the force over and over, the book never moving to or from the wall. How can one extract the force and convert it into usable energy? I realize energy can not be created, only converted. How can the weight of my body exerting force to the wall via the book be extracted without movement?

Hi zydubion1, welcome to PF. The basic answer is: no, energy cannot be extracted from force without displacement.

Thanks Mapes. Next question: If one could get a very small displacement, say 0.25mm, what are some of the best ways to extract usable energy when such small displacement is available?

Hmm... the first thing that comes to mind is piezoelectricity, which employs very small displacements. Alternatively, a lever might be used to amplify the displacement for use with other types of generators.

You might also get some ideas http://en.wikipedia.org/wiki/Energy_Harvesting" [Broken].

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Mapes...Thanks for your help. I will start doing some homework based our your suggestions.

## 1. What is energy extraction?

Energy extraction refers to the process of obtaining energy from various sources such as fossil fuels, wind, solar, hydro, and nuclear power. This energy can then be converted and utilized for various purposes such as electricity production, transportation, and heating.

## 2. Why is energy extraction important?

Energy extraction is important because it is essential for meeting our daily energy needs. It powers our homes, businesses, and industries, and enables us to maintain our standard of living. Additionally, as we continue to deplete our finite resources, finding alternative sources of energy extraction is crucial for sustainability.

## 3. What are the different methods of energy extraction?

The main methods of energy extraction include extracting fossil fuels such as coal, oil, and natural gas from the Earth's crust, harnessing wind and solar power through turbines and panels respectively, using hydroelectric power from water sources, and utilizing nuclear power from radioactive materials.

## 4. What are the potential environmental impacts of energy extraction?

The environmental impacts of energy extraction vary depending on the method used. Fossil fuel extraction can lead to air and water pollution, as well as contribute to climate change. Hydroelectric power can disrupt ecosystems and affect wildlife. Nuclear power poses the risk of accidents and long-term storage of radioactive waste. However, renewable energy sources such as wind and solar have minimal environmental impacts.

## 5. How can we improve energy extraction processes?

There are several ways to improve energy extraction processes, such as investing in research and development for more efficient and sustainable technologies, implementing stricter regulations for minimizing environmental impacts, and promoting the use of renewable energy sources. Additionally, reducing energy consumption through conservation efforts can also help improve energy extraction practices.