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.

Thing 1 and Thing 2 demonstrate some simple machines. The Cat takes us on a tour of Machine-a-ma-zoo, and demonstrates simple machines, with some help from Thing 1 and Thing 2. They take a look at ...