Basics of physics Physics is the study of the fundamental laws of nature that govern the behavior of the universe and everything in it. It is a branch of science that deals with the properties and interactions of matter, energy, space, and time. Some of the key concepts in physics include motion, energy, force, matter, and waves. One of the most famous laws in physics is the law of universal gravitation, which states that every object in the universe is attracted to every other object with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. This law was first proposed by Sir Isaac Newton in the 17th century and is still widely used today to understand the motion of planets, moons, and other celestial bodies. Another important concept in physics is energy, which can take many forms, including kinetic energy (the energy of motion), potential energy (the energy of position), and thermal energy (th...