Springs are everywhere.
They’re in pens, mattresses, toys, cars, electronic and medical devices and much, much more. But what makes a spring stay… springy?
It all comes down to force and Hooke’s Law, as Professor Brian Cox explains with a quick physics lesson.
WATCH: Professor Brian Cox explains all about Hooke's Law
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

