How were Isaac Newton's theories correct?

Answer 1

In a world where motion on the Earth was limited to the fastest horse or the speed of wind in a storm or tornado, his laws of motion were entirely adequate and correct for all practical purposes. The speed of light was the only thing that did not fit in with his equations, but as I mentioned, it was not a factor in his theories. His three laws of motion are correct and still used when the components of the affected system are not moving at relativistic speeds.

Answer 2

Isaac newton's theories, particularly his laws of motion and law of universal gravitation, were correct because they accurately described the behavior of objects on Earth and in space. His laws provided a framework for understanding the relationships between force, mass, and acceleration, and they formed the basis of classical mechanics. Additionally, Newton's mathematical formulations allowed for precise predictions and calculations of physical phenomena.