Potential energy is the energy stored in the system, which can also be released or converted into other forms of energy. Potential energy is a state quantity, also known as potential energy. Potential energy is not owned by a single object, but shared by interacting objects.

Gravity potential energy and elastic potential energy are two common potential energy. The energy possessed by an object due to elastic deformation is called elastic potential energy. Within a certain limit, the greater the deformation of an elastic object, the greater its elastic potential energy.

Potential energy theorem:

Only conservative forces can introduce corresponding potential energy. Non-conservative forces cannot introduce corresponding potential energy.

For example, the work done by gravity and the change of potential energy of gravity. Gravity does positive work, and the potential energy of gravity decreases. Gravity does negative work, potential energy increases, gravity does no work, potential energy remains unchanged, and potential energy changes as much as work.

According to the work done by conservative force, the change of corresponding potential energy can be judged.

Determination of potential energy: first, specify zero potential energy point, and then use the "potential energy theorem" to find out the potential energy of an object at a certain point through the change of potential energy.

Extended data

Conversion of kinetic energy and potential energy

1, kinetic energy and gravitational potential energy can be transformed into each other, such as rolling pendulum and simple pendulum.

2. Kinetic energy and elastic potential energy can be transformed into each other.

note:

1. Energy conversion can occur on the same object or between different objects.

2. In the process of mutual transformation between kinetic energy and potential energy, if no mechanical energy is converted into other energy and no other energy is converted into mechanical energy, the total amount of mechanical energy will remain unchanged.

As the saying goes, "there is no turning back arrow before opening the bow." This sentence reflects that the elastic potential energy of the string is converted into the kinetic energy of the arrow after the taut string is loosened. The process of archery is the process of using elastic potential energy to do work and transforming elastic potential energy of strings into kinetic energy of arrows.

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