What is an example of a pendulum in real life?

A common example of a pendulum in real life is the swinging mechanism in traditional pendulum clocks, like grandfather clocks. In these clocks, a pendulum swings back and forth at a consistent rate, controlling the gears and hands of the clock to keep accurate time. The regular motion of the pendulum is key to the clock's precision. This application of pendulums has been historically significant in timekeeping before the advent of modern quartz and digital clocks.