Does potential energy really exist?

Oh yes, and there is a very direct way to experience it. Take an object. Feel its weight. No, I am not talking about the gravitational potential energy (that is real, too, but that's another matter.) No, I am asking a simple question: Where is the mass of the object in your hands coming from? read more

Motion/energy is a universal reality and always exists. The gravitational potential energy of the Earth in orbit about the Sun will always remain only potential to avoid disaster for us. Gravitational potential energy only originates from an objects position in space and is a mathematical possibility; it is not reality due to being only potential. read more

", yes, they do exist. Light for example, is an electromagnetic wave, which can transfer both energy and momentum. In a quantum mechanics view, this is a discrete particle known as a photon, which interacts similarly to any other particle. read more