A pendulum continues swinging due to the principle of conservation of energy. When a pendulum is initially pulled to one side and released, it gains potential energy. As it begins to swing back and forth, it converts this potential energy to kinetic energy. The energy constantly transfers between potential and kinetic forms, allowing the pendulum to maintain its motion. This perpetual motion is sustained by the fact that the pendulum experiences minimal air resistance and friction, allowing energy to be conserved in the system. Overall, the pendulum's continued swinging is a result of the interplay between potential and kinetic energy, coupled with minimal energy loss from external factors.
