Contents
Key Stage 3
Meaning
Lubrication is when a substance is added to a surface to reduce friction.
About Lubrication
- When a lubricant is added to a surface the surface becomes more 'slippery'. This means the friction between that surface and another has decreased.
Key Stage 4
Meaning
Lubrication is when a substance is added to a surface to reduce friction.
About Lubrication
- When a lubricant is added to the boundary between two surfaces the friction is decreased.
- Lubricating Oil is a fraction of Crude Oil often used as lubrication in machines such as cars.
Lubrication and Energy Transfers
- When two surfaces rub together the friction causes energy to be transferred to the thermal energy store of the objects. Lubrication of the surfaces reduces the unwanted energy transfer reducing the heating effect caused when two surfaces rub together.
- Drills often use water or oil to lubricate the surface which helps prevent the drill from getting too hot and melting.
References
AQA
- Lubricants, page 16, GCSE Physics; The Revision Guide, CGP, AQA
- Lubricants, page 173, GCSE Combined Science; The Revision Guide, CGP, AQA
- Lubrication, page 26, GCSE Physics; Student Book, Collins, AQA
- Lubrication, page 37, GCSE Combined Science Trilogy; Physics, CGP, AQA
- Lubrication, page 39, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA