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State the empirical laws of static and k...

State the empirical laws of static and kinetic friction

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The empirical laws of friction are:
(i) Friction is independent of surface of contact. (ii) Coefficient of kinetic friction is less than coefficient of static friction. (iii) The direction of frictional force is always opposite to the motion of one body over the other. (iv) Frictional force always acts on the object parallel to the surface on which the object is placed. (v) The magnitude of frictional force between any two bodies in contact is directly proportional to the normal reaction between them.
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