I was making an ornithopter and it was having trouble lifting its wings. For the uninitiated, ornithopters are machines which fly by flapping their wings. The problem was that the lever arm was ...

How does that work?OK, so, a lever is simple machinethat helps you lift something by providingwhat's called a "mechanical advantage".Essentially, it's a way to lift heavy stuffusing less effort ...

(Class 2) place the fulcrum at one end of the lever and the effort at the other, with the load in the centre. The closer together the fulcrum and load are, the easier it is to lift the load.