Springs are everywhere.
They鈥檙e in pens, mattresses, toys, cars, electronic and medical devices and much, much more. But what makes a spring stay鈥 springy?
It all comes down to force and Hooke鈥檚 Law, as Professor Brian Cox explains with a quick physics lesson.
Want to know more about physics? We've got you sorted.
What does Star Wars get right about physics?
Don't worry, there's plenty it gets wrong too.
How to explain forces
KS3 Physics