While it is true that Albert Einstein's theory of general relativity revolutionized our understanding of gravity and provided a more accurate description than Isaac Newton's theory of gravity, Newton's equations are still widely used in many practical applications. There are a few reasons for this:
Simplicity and Practicality: Newton's equations of gravity, known as Newtonian mechanics, provide a simpler and more practical mathematical framework for many everyday situations. They are computationally less demanding and easier to apply in most cases, making them suitable for a wide range of engineering, physics, and astronomical calculations.
Approximation: In many situations, such as when dealing with objects at relatively low speeds and weak gravitational fields, the differences between Newtonian gravity and general relativity are negligible. Newton's equations serve as a good approximation under such circumstances, and the added complexity of using Einstein's field equations is unnecessary.
Compatibility with Other Theories: Newtonian mechanics is compatible with many other branches of classical physics, such as electromagnetism, making it easier to integrate with existing scientific frameworks. General relativity, on the other hand, introduces significant mathematical complexities and requires a more advanced understanding of tensor calculus and differential geometry.
That said, there are situations where Einstein's theory of general relativity becomes crucial. For example, when dealing with extremely massive objects, strong gravitational fields, or very high speeds, the effects predicted by general relativity, such as gravitational time dilation or the bending of light, become significant and cannot be accurately described by Newtonian gravity.
In summary, Newton's equations of gravity are still widely used due to their simplicity, practicality, and applicability in many situations. However, in scenarios involving extreme conditions or when high precision is required, Einstein's general relativity must be considered for a more accurate understanding of gravity.