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Kinesiology, Biomechanics & Sports
Question
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What is friction? Discuss various types of friction.

Answer

Friction is the force that combats relative motion between the two surfaces that comes in contact. Friction always acts in the opposite direction of the applied force. Friction can be of following types:-

  1. Static Friction – The opposite force that comes into play when the body tends to move over the surface of another, but the actual motion has not yet started.
  2. Dynamic Friction:- The opposing for that comes into play when one body is actually moved over the surface of another body. Dynamic friction may be of two type.
  3. Rolling friction:- The opposing force that may come into play when the body is actually rolling over the surface of another body. for ex-hockey/cricket ball is hit.
  4. Sliding friction:- The opposing force that comes into play when one body is actually sliding over the surface of the other body. For example – ice skating

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