Hello everyone, today we will discuss the principle of conservation of energy in physics. This principle states that energy cannot be created or destroyed, only transferred or converted from one form to another. This means that the total energy in a closed system remains constant over time. One of the most common examples of this principle is the simple pendulum. As the pendulum swings back and forth, its kinetic energy (energy of motion) is converted to potential energy (energy of position) at the top of each swing. When the pendulum reaches the lowest point of its swing, all of its energy is in the form of kinetic energy. This back and forth transfer of energy showcases the principle of conservation of energy. Another example of this principle is a roller coaster. As the coaster climbs to the top of a hill, its potential energy increases. As it speeds down the hill, this potential energy is converted into kinetic energy. The coaster's energy is constantly changing form, but the total amount of energy in the system remains the same. In conclusion, the principle of conservation of energy is a fundamental concept in physics that helps us understand the behavior of energy in various systems. By recognizing this principle, we can analyze and predict the energy transformations that occur in everyday phenomena.