{"id":5009,"date":"2025-06-28T16:10:11","date_gmt":"2025-06-28T10:40:11","guid":{"rendered":"https:\/\/study.madeeasy.in\/?p=5009"},"modified":"2025-07-22T11:39:51","modified_gmt":"2025-07-22T06:09:51","slug":"laws-of-friction","status":"publish","type":"post","link":"https:\/\/www.madeeasy.in\/study\/me\/strength-of-materials\/laws-of-friction","title":{"rendered":"Laws of Friction"},"content":{"rendered":"<h2>Static Friction<\/h2>\n<ol>\n<li>The force of friction always acts in a direction opposite to the impending motion.<\/li>\n<li>The limiting force of friction is proportional to the normal reaction.<\/li>\n<li>The force of friction is independent of the area of contact between the two surfaces.<\/li>\n<li>The force of <a href=\"https:\/\/study.madeeasy.in\/me\/strength-of-materials\/types-of-friction\/\" target=\"_blank\" rel=\"noopener\">friction<\/a> depends upon the roughness of the surfaces of two materials.<\/li>\n<\/ol>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_79_1 ez-toc-wrap-left counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.madeeasy.in\/study\/me\/strength-of-materials\/laws-of-friction\/#Kinetic-Friction\" >Kinetic Friction<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.madeeasy.in\/study\/me\/strength-of-materials\/laws-of-friction\/#Fluid-Friction\" >Fluid Friction<\/a><\/li><\/ul><\/nav><\/div>\n<h3><span class=\"ez-toc-section\" id=\"Kinetic-Friction\"><\/span>Kinetic Friction<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ol>\n<li style=\"text-align: left;\">The force of friction always acts in a direction so as to oppose the relative motion between two moving surfaces.<\/li>\n<li style=\"text-align: left;\">The magnitude of kinetic friction bears a constant ratio to the normal reaction between the two surfaces.<\/li>\n<li style=\"text-align: left;\">The force of friction is independent of the relative velocity between the two surfaces in contact, but it decreases slightly with an increase in velocity.<\/li>\n<li style=\"text-align: left;\">The <a href=\"https:\/\/study.madeeasy.in\/me\/strength-of-materials\/coefficient-of-friction\/\" target=\"_blank\" rel=\"noopener\">coefficient of friction<\/a> changes slightly by temperature changes.<\/li>\n<\/ol>\n<h3><span class=\"ez-toc-section\" id=\"Fluid-Friction\"><\/span>Fluid Friction<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ol>\n<li>The force of friction is almost independent of the load.<\/li>\n<li>The force of friction reduces with the increase of temperature of the lubricant.<\/li>\n<li>The force of friction depends upon the type of <a href=\"https:\/\/study.madeeasy.in\/ce\/fluid-mechanics\/viscosity\/\" target=\"_blank\" rel=\"noopener\">viscosity<\/a> of the lubricant.<\/li>\n<li>The force of friction is independent of the nature of surfaces.<\/li>\n<li>The frictional force increases with the increase in the relative velocity of the frictional surfaces.<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>Static Friction The force of friction always acts in a direction opposite to the impending motion. The limiting force of<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1619,10],"tags":[1624,1625,1622],"class_list":["post-5009","post","type-post","status-publish","format-standard","hentry","category-strength-of-materials","category-me","tag-fluid-friction","tag-kinetic-friction","tag-static-friction"],"_links":{"self":[{"href":"https:\/\/www.madeeasy.in\/study\/wp-json\/wp\/v2\/posts\/5009","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.madeeasy.in\/study\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.madeeasy.in\/study\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.madeeasy.in\/study\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.madeeasy.in\/study\/wp-json\/wp\/v2\/comments?post=5009"}],"version-history":[{"count":0,"href":"https:\/\/www.madeeasy.in\/study\/wp-json\/wp\/v2\/posts\/5009\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.madeeasy.in\/study\/wp-json\/wp\/v2\/media?parent=5009"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.madeeasy.in\/study\/wp-json\/wp\/v2\/categories?post=5009"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.madeeasy.in\/study\/wp-json\/wp\/v2\/tags?post=5009"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}