The Science Of Swings Is More Complex Than You Thought

Swings are a wonderful childhood staple, but it turns out that they're not quite as straightforward as you may have realised in your younger days. This video explains the physics behind them.

Sure, you can imagine them as a kind of pendulum -- but a rather complicated pendulum. In fact, they rely on a concept known as parametric resonance to work properly. Fortunately, this video explains exactly what that means. [YouTube]