Final answer:
The Gravity Model, based on Newton's law, predicts gravitational interactions well but not perfectly because it does not account for variations in real-world conditions and the space-time distortions described by general relativity, which become significant in high-precision scenarios such as GPS operation.
Step-by-step explanation:
The Gravity Model predicts well but not perfectly because of variations in real-world conditions and factors. While Newton's law of universal gravitation provides a reliable framework for understanding gravitational forces within our solar system and has been sufficient for guiding spacecraft and understanding the motion of celestial bodies, it doesn't account for all phenomena. For stronger gravitational fields or when high precision is required, such as in the orbit of Mercury or the operation of GPS systems, Einstein's theory of general relativity offers more accurate predictions. This is due to general relativity's ability to account for the distortion of space-time caused by mass, which is not considered in Newton's theory.
Physicists continue to use Newton's equations for most Earth-bound applications because the differences between Newtonian gravity and general relativity are often negligible under normal conditions. The mass of Earth-bound objects is generally too small to cause any significant space-time distortion, making Newton's law adequate for engineering tasks such as constructing bridges, buildings, and amusement park rides. Nonetheless, when it comes to satellite technology and very precise measurements, the effects of general relativity must be considered to ensure accuracy, highlighting the limitations of the Gravity Model in certain scenarios.