GCSE Physics (AQA)

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Lubrication

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Energy Conservation and dissipation of energy

Lubrication

2:31 Reducing Energy Losses
Spec 4.1.2.1
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  • Friction occurs when two objects rub against each other due to the interaction between their surfaces.
  • Even smooth surfaces have tiny irregularities that cause friction as particles rub together.
  • Friction opposes motion, converting kinetic energy to thermal energy, causing heat loss to surroundings.
  • Work must be done to keep an object moving against friction, replacing lost energy.
  • Lubrication reduces friction by applying a fluid layer to surfaces.
  • Oil and grease are common lubricants used in machines and engines to reduce wear and extend lifespan.
  • Lubrication fills surface irregularities, making them smoother and reducing friction and heat loss.
  • Lubrication is useful in industry to reduce energy losses in machinery.
  • Lubricated gears require less energy to spin due to reduced friction.
  • Examples include engine oil in cars to lubricate pistons, allowing smoother movement and lower operating temperatures.
  • Businesses benefit from lubrication by reducing electricity and running costs.

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