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State the Law of Conservation of Energy

Question

State the Law of Conservation of Energy

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Solution

The Law of Conservation of Energy states that energy cannot be created or destroyed, but it can be transferred or changed from one form to another. This means that the total amount of energy in a closed system remains constant, no matter what happens within that system. It's also known as the First Law of Thermodynamics.

Here are the steps to understand it:

  1. Consider any system, for example, a swinging pendulum. When the pendulum is at the highest point of its swing, it has maximum potential energy and zero kinetic energy.

  2. As the pendulum starts to swing down, the potential energy starts to decrease, but the kinetic energy (energy of motion) starts to increase.

  3. At the lowest point of its swing, the pendulum has maximum kinetic energy and zero potential energy.

  4. As the pendulum swings back up, the kinetic energy starts to decrease, but the potential energy starts to increase.

  5. This process continues back and forth. The total energy (potential + kinetic) at any point remains the same, illustrating the Law of Conservation of Energy.

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