Kineetiline ja potentsiaalne energia: tähtsad laused

The energy that bodies possess due to interaction is called potential energy. For example, the potential energy of a body at a height $h$ above the ground is

E_{p} = m g h

The energy that a body possesses due to motion is called kinetic energy.

The energy that a body possesses due to motion is called kinetic energy. The kinetic energy of a body can be calculated from the formula

E_{k} = \frac{m v^{2}}{2}

where $m$ is the mass of the body and $v$ is the velocity of the body.

The sum of the kinetic and potential energy of the bodies is called the total mechanical energy of the body. The law of conservation of mechanical energy states that the total mechanical energy of a body or a system of bodies does not change, it is a constant quantity:

E = E_{k} + E_{p} = const

Potential energy

Kinetic energy

Kinetic or movement energy

Total mechanical energy. Law of conservation of mechanical energy