What are two types of force that newton discovered?

Isaac newton is well-known for formulating the laws of motion, which describe two key types of force: gravitational force and contact force. Gravitational force is the attraction between two masses, which governs the motion of celestial bodies and objects on Earth. Contact force, on the other hand, arises from physical interactions between objects, such as friction, tension, and normal force. Together, these forces provide a framework for understanding the motion of objects in various contexts.