Perpetual motion refers to the hypothetical concept of a machine or device that can operate indefinitely without an external energy source. Such a machine would be able to continuously perform work or produce energy without the need for fuel or input energy, effectively violating the laws of thermodynamics. There are two main types of perpetual motion: 1. **Perpetual Motion of the First Kind**: This type violates the first law of thermodynamics, which states that energy cannot be created or destroyed.
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