Why Do Waves Oscillate Like a Pendulum?

[Einstein's Cat]

Please correct me or excuse me for my potential ignorance but why do waves oscilliate?

 

[DrClaude]

For the same reason a pendulum swings or a spring oscillates. There is a disturbance and some restoring force (like the tension is a string). But as the system returns to what would be the stationary point, it has acquired velocity and continues past the equilibrium point, and so on...

 

[Einstein's Cat]

For the same reason a pendulum swings or a spring oscillates. There is a disturbance and some restoring force (like the tension is a string). But as the system returns to what would be the stationary point, it has acquired velocity and continues past the equilibrium point, and so on...

Thank you very much for your help