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Explain various types of friction suggest a few methodsto reduce friction

Answer» <html><body><p></p>Solution :There are two types of Friction: <br/> (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 <br/> `0 <a href="https://interviewquestions.tuteehub.com/tag/lt-537906" style="font-weight:bold;" target="_blank" title="Click to know more about LT">LT</a>= f_s lt= mu_s N` <br/>where ,`mu_s` - coefficient of static friction <br/>N - Normal force<br/>Kinetic friction: The frictional force exerted by the surface when an object slides as kinetic friction. Also called as <a href="https://interviewquestions.tuteehub.com/tag/sliding-1211847" style="font-weight:bold;" target="_blank" title="Click to know more about SLIDING">SLIDING</a> friction or <a href="https://interviewquestions.tuteehub.com/tag/dynamic-11476" style="font-weight:bold;" target="_blank" title="Click to know more about DYNAMIC">DYNAMIC</a> friction, <br/>`f_k = mu_ k N` <br/> where `mu_k`- the coefficient of kinetic friction <br/>N - Normal force exerted by the surface on the object <br/>Methods to reduce friction: Friction can be reduced <br/>(i) By using lubricants (ii) By using Ball bearings (iii) By polishing (<a href="https://interviewquestions.tuteehub.com/tag/iv-501699" style="font-weight:bold;" target="_blank" title="Click to know more about IV">IV</a>) By streamlining</body></html>


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