friction
• It is a force that slows down moving
https://www.youtube.com/watch?v=V2P6CuH
VWvIbjects
• Friction: is a force between two surfaces that
are sliding, or trying to slide, across each other
• Reducing friction: a layer of oil is added
between 2 surfaces to reduce the force of
friction this called lubrication
Harmful friction
Useful friction