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Explain various types of friction suggest a few methodsto reduce friction |
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Answer» Solution :There are two types of Friction: (i) Static Friction: Static friction is the force which opposes the initiation of motion of an object on the surface. The magnitude of static frictional force `f_s`lies between `0 LT= f_s lt= mu_s N` where ,`mu_s` - coefficient of static friction N - Normal force Kinetic friction: The frictional force exerted by the surface when an object slides as kinetic friction. Also called as SLIDING friction or DYNAMIC friction, `f_k = mu_ k N` where `mu_k`- the coefficient of kinetic friction N - Normal force exerted by the surface on the object Methods to reduce friction: Friction can be reduced (i) By using lubricants (ii) By using Ball bearings (iii) By polishing (IV) By streamlining |
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