chapter8 (friction) - CHAPTER EIGHT FRICTION Friction...

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CHAPTER EIGHT FRICTION
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Friction Contd. Whenever there is relative motion between two bodies in contact, frictional force will develop along the line of contact. The direction of action of the frictional force on one of the bodies e.g. A is such as to oppose the direction of the relative motion of A with respect to B. Similarly for B.
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Friction Contd. B A V A V B F V A > V B
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Friction Contd. For friction to exist, actual relative motion is not necessary. It is sufficient that there be a tendency to move. That is if A tends to move relatively to B, without actually moving, frictional forces will be set up.
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Types of Friction There are two types : dry and fluid friction. When the surfaces in contact are rigid bodies, it is dry and if one is a fluid, fluid friction obtains. The latter will be covered in Fluid Mechanics in the next semester. 8.2 Dry Friction P W R If the body is in equilibrium and the force P applied does not move the body along surface of contact. No friction force exists. Fy
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This note was uploaded on 06/18/2009 for the course CE xxx taught by Professor Tuken during the Spring '09 term at Middle East Technical University.

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chapter8 (friction) - CHAPTER EIGHT FRICTION Friction...

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