When you push or pull with a simple machine, you are applying a force and doing work. And, if you get more force out of a machine than you put into it, then that machine has a mechanical advantage.

At first glance, it might look like an ordinary vending machine, but it's something far more meaningful. Instead of snacks or ...

The Francis! Francis! X1 espresso machine in its assembled state. (Credit: Samuel Leeuwenburg) Recently, [Samuel Leeuwenburg] got his paws on a Francis! Francis! X1 (yes, that’s the name) espresso ...