Practical applications of eigenvectors

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Eigenvectors and eigenvalues are essential concepts in linear algebra, often used in various practical applications such as stability analysis, quantum mechanics, and facial recognition technology. The discussion highlights a need for practical examples of eigenvector problems, particularly using a 2x2 matrix. While the theory is understood, there is a challenge in creating a relevant problem that applies these concepts. Resources like Wikipedia can provide foundational knowledge, but specific application scenarios are sought. Exploring real-world contexts can enhance understanding and facilitate problem creation involving eigenvalues and eigenvectors.
Martin III
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Homework Statement


A simple eigenvector problem using a 2x2 matrix.

Homework Equations


Ax = \lambda x

The Attempt at a Solution


I don't have one. I know and understand the theory behind eigenvectors, but I cannot think of a practical application. I need to create a problem that uses eigenvalues/eigenvectors as a solution.
 
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The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?

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