Civil Engineering ⇒ Topic : Laws of Friction
|1. The force of friction always acts in a
direction, opposite to that in which the body is
moving or tends to move.
2. The magnitude of the force of friction is equal to the force which just makes the body to move.
3. The magnitude of the limiting friction bears a constant ratio to the normal reaction between the two surfaces.
4. The force of friction is independent of area and shape of the surface in contact so long as the intensity of the normal reaction remains constant.
5. The force of friction depends upon the roughness of the surface in contact and the material of which the surface are made.
6. For moderate speeds, the force of friction remains constant but it decreases slightly with the increase of speed.
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