At which location will Newton's laws of motion be inadequate in describing precisely the motions of objects?

Question

Quizplus · Accepted Answer

Newton's laws of motion work well for describing the motions of objects at relatively low speeds and in weak gravitational fields. However, as an object approaches the speed of light or experiences extreme gravitational forces (such as near a black hole or inside the orbit of Mercury), the laws become inadequate and must be replaced with Einstein's theory of relativity.

At Which Location Will Newton's Laws of Motion Be Inadequate