How do the factors of gravity, phase difference and other series impact how pendulums work in the pendulum swing?

Question: How do the factors of gravity, phase difference and other series impact how pendulums work in the pendulum swing?
- Keywords:
  gravity,
  pendulum
Asked by James on 15 Jan 2020.
- Amy Mason answered on 15 Jan 2020:
  
  This is a bit beyond what I can answer without a good deal of time and a whiteboard. I’d recommend looking into how simple harmonic oscillators work and looking for a physics or maths textbook.
  
  Try starting with: https://www.khanacademy.org/science/ap-physics-1/simple-harmonic-motion-ap/simple-pendulums-ap/v/pendulum

Question: How do the factors of gravity, phase difference and other series impact how pendulums work in the pendulum swing?