Simple harmonic motion describes the vibration of atoms, ... and in 1675 developed a theory of elasticity or springiness as a way to regulate pendulum clocks. In short, ...

At what starting angle does the pendulum not agree with a simple harmonic motion model? Run the pendulum model for a much longer time than just 10 seconds (easy to change in the code above).

The period of a simple harmonic oscillator is also independent of its amplitude. From its definition, the acceleration, a, of an object in simple harmonic motion is proportional to its displacement, x ...