Principle of Conservation of Energy (3)

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Transformation in the forms of energy for the load between elastic potential energy (elastic P.E.) and kinetic energy (K.E.) from position Y to X (4)

- Elastic P.E. increasing (spring is gradually becoming more stretched) - K.E. decreasing (speed of spring decreasing)

Transformation in the forms of energy for the load between elastic potential energy (elastic P.E.) and kinetic energy (K.E.) at position X

- Elastic P.E. = maximum (spring is most stretched) - K.E. = zero (spring is stationary, speed = zero)

Transformation of kinetic energy and potential energy in a closed system

In a closed system, the transformation of energy between potential energy and kinetic energy obeys the Principle of Conservation of Energy

The total potential energy and kinetic energy in a closed oscillation system

The total potential energy and kinetic energy in a closed oscillation system is constant

Principle of Conservation of Energy (1)

Based on the Principle of Conservation of Energy, energy can transform from one form to another

Principle of Conservation of Energy (2)

When energy transforms, a small portion of the energy is converted into useful energy

Principle of Conservation of Energy (3)

A large portion of the energy is converted into wasted energy such as heat energy caused by friction

Principle of Conservation of Energy (4)

A closed system is a system in which there is no external force such as friction

Example of wasted energy

Heat energy caused by friction

Graph of the transformation in the forms of energy

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