Have you got it right?

Let's see how well you understand this principle of balance.

There will be a series of questions. You can use your paper to answer, and if you don't get it right the first time, you can go back to the simulations at the top of the page. Try to think and use the concepts we have just seen to answer.

If you don't succeed straight away, don't worry! You'll be given hints and even an explanation at the end 🙂