Definition of energy:It is the ability to work, to do a job, to do something like criticizing, moving, and cooking ....., and to obtain many forms. It can also be converted from another form, and energy is measured in joules.Law of survival energy:The law of survival states that in an isolated system energy, energy is neither destroyed nor created from scratch, but can be transformed from one form to another.Different images of energy:Energy has many different forms, such as:Chemical Energy: Chemical energy comes from the atoms and molecules and how they interact.Electric energy: electrical energy is generated by the movement of electrons.Gravitational energy: Large objects such as the earth and the sun create gravity and gravitational energy.Thermal energy: It comes from molecules that are the result of various thermal reactions.Light energy: light is called (radiant energy). And the Earth gets a lot of its energy from sunlight.Energy of motion: Anything that moves, has energy. This energy is also called kinetic energy.Nuclear energy: Huge amounts of nuclear energy can be generated by splitting atoms.Potential energy or potential energy: potential energy is stored energy.What is mechanical energy:Mechanical energy is defined as the sum of the potential and motion energy of any object.What is the law of survival of mechanical energy:The sum of the potential and kinetic energies of any object is a constant amount that does not change at all points the object passes through.Examples of the mechanical energy law of survival: - Free fall with neglect of air resistance: During the fall of the object, the potential energy decreases and the kinetic energy increases gradually, and the amount of decrease in the amount of the potential energy is the same as the amount of the increase in the kinetic energy, so the sum of the position and motion energies is equal at all points.- The movement of the pendulum while neglecting the air resistance: when holding a pendulum pulley and raising it at a certain height, it stores potential energy, then let it go, the potential energy gradually decreases and the motion energy increases until it reaches the maximum speed, then decreases again and the position energy increases by the same amount, so that the sum of the position and movement energies is equal. At what point proves the law of survival of energy.You can experiment with the survival mechanical energy law by default on the Flappy platform.