Bitesize has changed! We're updating subjects as fast as we can. Visit our new site to find Bitesize guides and clips - and tell us what you think!

Did you know?

We also have Bitesize study guides covering many subjects at National 4 and National 5 on our Knowledge & Learning BETA website.

Home > Physics > Revision videos > Friction

Physics

Friction

Friction

Friction is created whenever two surfaces rub together. This video explains how friction works, and demonstrates how surprisingly strong a force it can be.

In order to see this content you need to have both Javascript enabled and Flash installed.

Key learning points:

  • Friction always acts in the opposite direction to movement, i.e. it opposes the motion of an object.
  • Air resistance is a frictional force which opposes motion through air.
  • Frictional forces can be useful, e.g. to allow car tyres to grip the road or to slow down a falling parachutist.

BBC © 2014 The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.