Auniversal and absolute fact or truth about a specific action or phenomenon

A universal and absolute fact or truth about a specific action or phenomenon is known as a law.
For example, there is a natural law that says that there are certain rights that all people living on Earth should have equally without discrimination. It is a universal truth, a fact, and thus it was even made into a law in America within its Declaration of Independence.

When the ball is rising up, it gains kinetic energy. when the ball reaches the very top, it will have all potential energy, until it falls back down and gains it kinetic energy. finally when you catch the ball or it falls back down, it would have gained its potential energy back.