3.2.13

Friction 2

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Friction and Air Resistance

Friction is the force created by two surfaces rubbing against each other. Friction opposes motion and often causes heating.

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Friction

  • Friction opposes motion and often causes heating.
  • Separating two surfaces with a thin layer of oil can reduce friction and allow them to move more freely across each other.
  • Fidget spinners reduce friction to the lowest level possible to let them spin for as long as possible.
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Air resistance

  • Air resistance is a frictional force.
  • It opposes an object's motion.

Jump to other topics

1Biology

1.1Cells, Tissues & Organs

1.2Reproduction & Variation

1.3Ecological Relationships & Classification

1.4Digestion & Nutrition

1.5Plants & Photosynthesis

1.6Biological Systems & Processes

2Chemistry

2.1Particles

2.2Chemical Reactions

2.3Atoms, Elements, Compounds

2.4The Periodic Table

2.5Materials & the Earth

2.6Reactivity

2.7Energetics

2.8Properties of Materials

3Physics

3.1Energy

3.2Forces & Motion

3.3Waves

3.4Electricity & Magnetism

3.5Matter

3.6Space Physics

4Disciplinary Knowledge

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