{"id":3963,"date":"2023-01-09T10:42:47","date_gmt":"2023-01-09T10:42:47","guid":{"rendered":"https:\/\/8thclass.deltapublications.in\/?page_id=3963"},"modified":"2025-08-13T08:09:48","modified_gmt":"2025-08-13T08:09:48","slug":"s-12-d-increasing-and-reducing-friction","status":"publish","type":"page","link":"https:\/\/8thclass.deltapublications.in\/index.php\/s-12-d-increasing-and-reducing-friction\/","title":{"rendered":"s-12.d Increasing And Reducing Friction"},"content":{"rendered":"\n<h2 class=\"wp-block-heading has-text-align-center has-text-color\" style=\"color:#00056d;text-transform:uppercase\"><strong>Increasing And Reducing Friction<\/strong><\/h2>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<iframe loading=\"lazy\" width=\"560\" height=\"315\" \n    src=\"https:\/\/www.youtube.com\/embed\/GOae3-8IJIs?si=Vn_TejO-0Zd0Wl0h&#038;rel=0\" \n    title=\"YouTube video player\" \n    frameborder=\"0\" \n    allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" \n    referrerpolicy=\"strict-origin-when-cross-origin\" \n    allowfullscreen>\n<\/iframe>\n\n<\/div>\n<\/div>\n\n\n\n<p class=\"has-text-color has-link-color has-huge-font-size wp-elements-28d136ae4331e7eb05ec8e1cb71ebcde\" style=\"color:#74008b\">key notes :<\/p>\n\n\n\n<h4 class=\"wp-block-heading has-text-color has-link-color wp-elements-1340e539d249f3596cfda8352d126fe9\" style=\"color:#000060\"><strong>Definition of Friction<\/strong><\/h4>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"579\" src=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2025\/08\/Untitled-design-2025-08-12T111016.524-1024x579.png\" alt=\"\" class=\"wp-image-21071\" style=\"width:469px;height:auto\" srcset=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2025\/08\/Untitled-design-2025-08-12T111016.524-1024x579.png 1024w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2025\/08\/Untitled-design-2025-08-12T111016.524-300x170.png 300w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2025\/08\/Untitled-design-2025-08-12T111016.524-768x434.png 768w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2025\/08\/Untitled-design-2025-08-12T111016.524.png 1472w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>Friction is a force that opposes the relative motion of two surfaces in contact.<\/li>\n\n\n\n<li>It acts parallel to the surface and opposite to the direction of movement.<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-aaa5853bef94974998ff7ced98c0bf56\" style=\"color:#000060\"><strong>Types of Friction<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Static Friction<\/strong>: Prevents surfaces from sliding past each other.<\/li>\n\n\n\n<li><strong>Sliding Friction<\/strong>: Occurs when two surfaces slide over each other.<\/li>\n\n\n\n<li><strong>Rolling Friction<\/strong>: Happens when an object rolls over a surface.<\/li>\n\n\n\n<li><strong>Fluid Friction<\/strong>: Resistance from liquids or gases when an object moves through them.<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"579\" src=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2025\/08\/Untitled-design-2025-08-12T111151.759-1024x579.png\" alt=\"\" class=\"wp-image-21074\" style=\"width:493px;height:auto\" srcset=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2025\/08\/Untitled-design-2025-08-12T111151.759-1024x579.png 1024w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2025\/08\/Untitled-design-2025-08-12T111151.759-300x170.png 300w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2025\/08\/Untitled-design-2025-08-12T111151.759-768x434.png 768w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2025\/08\/Untitled-design-2025-08-12T111151.759.png 1472w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<h4 class=\"wp-block-heading has-text-color has-link-color wp-elements-5d56936f0ddbd09daa8db335b7dcca9d\" style=\"color:#000060\"><strong>Factors Affecting Friction<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Surface Roughness<\/strong>: Rougher surfaces have higher friction due to more interlocking between surfaces.<\/li>\n\n\n\n<li><strong>Normal Force<\/strong>: The heavier the object, the more friction it generates.<\/li>\n\n\n\n<li><strong>Nature of the Materials<\/strong>: Different materials produce different levels of friction (e.g., rubber on concrete vs. ice on metal).<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"579\" src=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2025\/08\/Untitled-design-2025-08-12T111319.721-1024x579.png\" alt=\"\" class=\"wp-image-21075\" style=\"width:477px;height:auto\" srcset=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2025\/08\/Untitled-design-2025-08-12T111319.721-1024x579.png 1024w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2025\/08\/Untitled-design-2025-08-12T111319.721-300x170.png 300w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2025\/08\/Untitled-design-2025-08-12T111319.721-768x434.png 768w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2025\/08\/Untitled-design-2025-08-12T111319.721.png 1472w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<h4 class=\"wp-block-heading has-text-color has-link-color wp-elements-e3485a31d58066bb960289c65711ee5f\" style=\"color:#000060\"><strong>Increasing Friction<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Making Surfaces Rougher<\/strong>: Adding rough materials like sand or rubber increases friction.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"has-large-font-size\"><strong>Increasing Normal Force<\/strong>: Adding weight or pressure increases the force of friction.<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Using Adhesive Materials<\/strong>: Sticky substances or treads on shoes and tires increase friction.<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"579\" src=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2025\/08\/Untitled-design-2025-08-12T111538.222-1024x579.png\" alt=\"\" class=\"wp-image-21078\" style=\"width:449px;height:auto\" srcset=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2025\/08\/Untitled-design-2025-08-12T111538.222-1024x579.png 1024w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2025\/08\/Untitled-design-2025-08-12T111538.222-300x170.png 300w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2025\/08\/Untitled-design-2025-08-12T111538.222-768x434.png 768w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2025\/08\/Untitled-design-2025-08-12T111538.222.png 1472w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<h4 class=\"wp-block-heading has-text-color has-link-color wp-elements-595ac503f7f0774be88b64d9a023850f\" style=\"color:#000060\"><strong>Applications of Increased Friction<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Brakes in Vehicles<\/strong>: Friction is increased using brake pads to slow down or stop the vehicle.<\/li>\n\n\n\n<li><strong>Athletic Shoes<\/strong>: Designed with textured soles to increase grip and prevent slipping.<\/li>\n\n\n\n<li><strong>Sandpaper<\/strong>: Used to make surfaces rough for better adhesion in painting or gluing.<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading has-text-color has-link-color wp-elements-190ccc25bd94d183a03e9cf52a22a135\" style=\"color:#000060\"><strong>Reducing Friction<\/strong><\/h4>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"579\" src=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2025\/08\/Untitled-design-2025-08-12T111902.332-1024x579.png\" alt=\"\" class=\"wp-image-21079\" style=\"width:496px;height:auto\" srcset=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2025\/08\/Untitled-design-2025-08-12T111902.332-1024x579.png 1024w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2025\/08\/Untitled-design-2025-08-12T111902.332-300x170.png 300w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2025\/08\/Untitled-design-2025-08-12T111902.332-768x434.png 768w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2025\/08\/Untitled-design-2025-08-12T111902.332.png 1472w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Lubrication<\/strong>: Applying oils, greases, or other lubricants reduces friction between surfaces.<\/li>\n\n\n\n<li><strong>Smoothing Surfaces<\/strong>: Polishing or using smoother materials reduces friction.<\/li>\n\n\n\n<li><strong>Using Ball Bearings<\/strong>: Rolling friction is lower than sliding friction, so ball bearings help in reducing friction in machinery.<\/li>\n\n\n\n<li><strong>Streamlining<\/strong>: Objects like cars and airplanes are designed to reduce fluid friction by having smooth, aerodynamic shapes.<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading has-text-color has-link-color wp-elements-3f7466839a83f77e496509ce24a780f4\" style=\"color:#000060\"><strong>Applications of Reduced Friction<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Machinery and Engines<\/strong>: Lubricants reduce friction, preventing wear and tear.<\/li>\n\n\n\n<li><strong>Ice Skating<\/strong>: Ice provides low friction, allowing smooth gliding.<\/li>\n\n\n\n<li><strong>Airplanes and Cars<\/strong>: Streamlined shapes reduce air resistance, improving speed and efficiency.<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-0dc8c9f84082bee6bda6f5719b376bff\" style=\"color:#000060\"><strong>Balancing Friction<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Essential in Everyday Life<\/strong>: Friction needs to be managed carefully; too much friction causes wear and too little causes slipping.<\/li>\n\n\n\n<li><strong>Example in Transport<\/strong>: Proper tire tread design provides enough friction for safety without excessive wear.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-color has-large-font-size\" style=\"color:#d90000\"><strong>Let&#8217;s practice!<\/strong><\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/wordwall.net\/play\/77130\/487\/321\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-2-115.png\" alt=\"\" class=\"wp-image-7870\" srcset=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-2-115.png 500w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-2-115-300x300.png 300w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-2-115-150x150.png 150w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/wordwall.net\/play\/77053\/338\/145\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-1-114.png\" alt=\"\" class=\"wp-image-7871\" srcset=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-1-114.png 500w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-1-114-300x300.png 300w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-1-114-150x150.png 150w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n<\/div>\n<\/div>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Increasing And Reducing Friction key notes : Definition of Friction Types of Friction Factors Affecting Friction Increasing Friction Applications of Increased Friction Reducing Friction Applications of Reduced Friction Balancing Friction Let&#8217;s practice!<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"class_list":["post-3963","page","type-page","status-publish","hentry","entry"],"aioseo_notices":[],"_hostinger_reach_plugin_has_subscription_block":false,"_hostinger_reach_plugin_is_elementor":false,"_links":{"self":[{"href":"https:\/\/8thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3963","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/8thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/8thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/8thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/8thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/comments?post=3963"}],"version-history":[{"count":25,"href":"https:\/\/8thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3963\/revisions"}],"predecessor-version":[{"id":21168,"href":"https:\/\/8thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3963\/revisions\/21168"}],"wp:attachment":[{"href":"https:\/\/8thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/media?parent=3963"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}