{"id":3957,"date":"2023-01-09T10:42:04","date_gmt":"2023-01-09T10:42:04","guid":{"rendered":"https:\/\/8thclass.deltapublications.in\/?page_id=3957"},"modified":"2025-08-19T09:25:39","modified_gmt":"2025-08-19T09:25:39","slug":"s-12-a-force-of-friction","status":"publish","type":"page","link":"https:\/\/8thclass.deltapublications.in\/index.php\/s-12-a-force-of-friction\/","title":{"rendered":"s-12.a Force Of Friction"},"content":{"rendered":"\n<h2 class=\"wp-block-heading has-text-align-center has-text-color\" style=\"color:#00056d;text-transform:uppercase\"><strong>Force Of 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<div style=\"position: relative; width: 100%; height: 0; padding-top: 56.2500%;\n padding-bottom: 0; box-shadow: 0 2px 8px 0 rgba(63,69,81,0.16); margin-top: 1.6em; margin-bottom: 0.9em; overflow: hidden;\n border-radius: 8px; will-change: transform;\">\n  <iframe loading=\"lazy\" style=\"position: absolute; width: 100%; height: 100%; top: 0; left: 0; border: none; padding: 0;margin: 0;\"\n    src=\"https:\/\/www.canva.com\/design\/DAF6tc8O-Us\/XFrv2_Lzpj6Jo6OlEWFBEQ\/watch?embed\" allowfullscreen=\"allowfullscreen\" allow=\"fullscreen\">\n  <\/iframe>\n<\/div>\n<a href=\"https:&#x2F;&#x2F;www.canva.com&#x2F;design&#x2F;DAF6tc8O-Us&#x2F;XFrv2_Lzpj6Jo6OlEWFBEQ&#x2F;watch?utm_content=DAF6tc8O-Us&amp;utm_campaign=designshare&amp;utm_medium=embeds&amp;utm_source=link\" target=\"_blank\" rel=\"noopener\">force of friction<\/a> by Delta publications\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<p class=\"has-text-color has-link-color has-large-font-size wp-elements-f0e8e39a295c87b4d12e41589c2b1d25\" style=\"color:#000060\"><strong>What is Friction?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"has-large-font-size\">Friction is the force that opposes the relative motion or attempts of such motion between two surfaces in contact.<\/li>\n<\/ul>\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:50%\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-1024x1024.png\" alt=\"\" class=\"wp-image-16387\" srcset=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-1024x1024.png 1024w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-300x300.png 300w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-150x150.png 150w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-768x768.png 768w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-400x400.png 400w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-1536x1536.png 1536w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-2048x2048.png 2048w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-1568x1568.png 1568w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:50%\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-1-1024x1024.png\" alt=\"\" class=\"wp-image-16388\" srcset=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-1-1024x1024.png 1024w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-1-300x300.png 300w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-1-150x150.png 150w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-1-768x768.png 768w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-1-400x400.png 400w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-1-1536x1536.png 1536w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-1-2048x2048.png 2048w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-1-1568x1568.png 1568w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-e1f7e346cce2906eb11b4a1c70ab1e21\" style=\"color:#000060\"><strong>Types of Friction<\/strong>:<\/p>\n\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-21a4b5ec34cbc9e4d30fc810f3689ac6\" style=\"color:#000060\"><strong>Static Friction<\/strong>: <\/p>\n\n\n\n<p class=\"has-large-font-size\">This type of friction prevents an object from moving when a force is applied but the object doesn&#8217;t move.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-2-1024x1024.png\" alt=\"\" class=\"wp-image-16391\" style=\"width:378px;height:auto\" srcset=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-2-1024x1024.png 1024w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-2-300x300.png 300w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-2-150x150.png 150w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-2-768x768.png 768w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-2-400x400.png 400w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-2-1536x1536.png 1536w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-2-2048x2048.png 2048w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-2-1568x1568.png 1568w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-db06dd4fb9ba73bb3092ca33043e3849\" style=\"color:#000060\"><strong>Kinetic Friction<\/strong>: <\/p>\n\n\n\n<p class=\"has-large-font-size\">This type of friction opposes the motion of an object already in motion.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-3-1024x1024.png\" alt=\"\" class=\"wp-image-16392\" style=\"width:392px;height:auto\" srcset=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-3-1024x1024.png 1024w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-3-300x300.png 300w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-3-150x150.png 150w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-3-768x768.png 768w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-3-400x400.png 400w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-3-1536x1536.png 1536w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-3-2048x2048.png 2048w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-3-1568x1568.png 1568w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-e58cd7a6d07cbae569dda0bfb93ed7c6\" style=\"color:#000060\"><strong>Rolling Friction<\/strong>: <\/p>\n\n\n\n<p class=\"has-large-font-size\">This occurs when an object rolls over a surface. It&#8217;s usually lower than kinetic friction.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-4-1024x1024.png\" alt=\"\" class=\"wp-image-16393\" style=\"width:391px;height:auto\" srcset=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-4-1024x1024.png 1024w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-4-300x300.png 300w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-4-150x150.png 150w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-4-768x768.png 768w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-4-400x400.png 400w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-4-1536x1536.png 1536w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-4-2048x2048.png 2048w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-4-1568x1568.png 1568w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-37a55e8195dc7b114c62a801204ba0de\" style=\"color:#000060\"><strong>Fluid Friction<\/strong>: <\/p>\n\n\n\n<p class=\"has-large-font-size\">This happens when an object moves through a fluid (like air or water) and encounters resistance.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-5-1024x1024.png\" alt=\"\" class=\"wp-image-16395\" style=\"width:364px;height:auto\" srcset=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-5-1024x1024.png 1024w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-5-300x300.png 300w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-5-150x150.png 150w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-5-768x768.png 768w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-5-400x400.png 400w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-5-1536x1536.png 1536w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-5-2048x2048.png 2048w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-5-1568x1568.png 1568w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-52fdd69877ffcb412d9dad88b8c18dbd\" style=\"color:#000060\"><strong>Factors Affecting Friction<\/strong>:<\/p>\n\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-75e5aeb44fe26a62d67ca2635918ab17\" style=\"color:#000060\"><strong>Nature of Surfaces<\/strong>: <\/p>\n\n\n\n<p class=\"has-large-font-size\">The roughness or smoothness of surfaces affects friction. Rough surfaces create more friction.<\/p>\n\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-6e0252b80b10f91f1e37ab0a17979fe2\" style=\"color:#000060\"><strong>Force Normal to the Surface<\/strong>: <\/p>\n\n\n\n<p class=\"has-large-font-size\">Increasing the force pressing the surfaces together increases friction.<\/p>\n\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-dd6bc3b7e2d049023070556126f06604\" style=\"color:#000060\"><strong>Temperature:<\/strong> <\/p>\n\n\n\n<p class=\"has-large-font-size\">Friction generally decreases with an increase in temperature.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-7-1024x1024.png\" alt=\"\" class=\"wp-image-16399\" style=\"width:403px;height:auto\" srcset=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-7-1024x1024.png 1024w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-7-300x300.png 300w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-7-150x150.png 150w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-7-768x768.png 768w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-7-400x400.png 400w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-7-1536x1536.png 1536w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-7-2048x2048.png 2048w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-7-1568x1568.png 1568w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-24e821dcdafc930649b404401639c7f7\" style=\"color:#000060\"><strong>Importance of Friction:<\/strong><\/p>\n\n\n\n<p class=\"has-large-font-size\">Friction is essential in everyday life for walking, driving, and preventing objects from slipping.<\/p>\n\n\n\n<p class=\"has-large-font-size\">It helps us grip objects and is necessary for various machines to function properly.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-8-1024x1024.png\" alt=\"\" class=\"wp-image-16402\" style=\"width:442px;height:auto\" srcset=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-8-1024x1024.png 1024w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-8-300x300.png 300w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-8-150x150.png 150w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-8-768x768.png 768w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-8-400x400.png 400w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-8-1536x1536.png 1536w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-8-2048x2048.png 2048w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-8-1568x1568.png 1568w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-34db6c4ba804db7443803649d1ba77b4\" style=\"color:#000060\"><strong>Ways to Reduce Friction<\/strong>:<\/p>\n\n\n\n<p class=\"has-large-font-size\">Lubrication: Adding substances like oil or grease to surfaces reduces friction.<\/p>\n\n\n\n<p class=\"has-large-font-size\">Smoothing Surfaces: Polishing or making surfaces smoother can reduce friction.<\/p>\n\n\n\n<p class=\"has-large-font-size\">Using Wheels and Rollers: These reduce friction by rolling instead of sliding.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-9-1024x1024.png\" alt=\"\" class=\"wp-image-16403\" style=\"width:374px;height:auto\" srcset=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-9-1024x1024.png 1024w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-9-300x300.png 300w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-9-150x150.png 150w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-9-768x768.png 768w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-9-400x400.png 400w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-9-1536x1536.png 1536w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-9-2048x2048.png 2048w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/07\/force-9-1568x1568.png 1568w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-8c11db93c2f1a733823e5941ee590739\" style=\"color:#000060\"><strong>Calculating Friction<\/strong>:<\/p>\n\n\n\n<p class=\"has-large-font-size\">The force of friction (Ff) can be calculated using the formula: Ff = \u03bcN, where \u03bc is the coefficient of friction and N is the normal force (force pressing the surfaces together).<\/p>\n\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-a987e415c8aeaaf9b023c153c505c198\" style=\"color:#000060\"><strong>Coefficient of Friction:<\/strong><\/p>\n\n\n\n<p class=\"has-large-font-size\">It&#8217;s a measure of how much friction exists between two surfaces. It&#8217;s represented by the symbol \u03bc.<\/p>\n\n\n\n<p class=\"has-large-font-size\">The coefficient of friction is different for different pairs of materials. For example, rubber on concrete has a higher coefficient of friction than ice on ice.<\/p>\n\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-2e960a4eb0b4a6760fb99ade3aa6e673\" style=\"color:#000060\"><strong>Applications of Friction:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li class=\"has-large-font-size\"> Brakes in vehicles use friction to slow down or stop.<\/li>\n\n\n\n<li class=\"has-large-font-size\">Tires use friction to grip the road.<\/li>\n\n\n\n<li class=\"has-large-font-size\">Shoes have soles with friction to prevent slipping.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-color has-huge-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\/77090\/835\/616\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-2-112.png\" alt=\"\" class=\"wp-image-7859\" srcset=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-2-112.png 500w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-2-112-300x300.png 300w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-2-112-150x150.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\/77048\/829\/824\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-1-111.png\" alt=\"\" class=\"wp-image-7861\" srcset=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-1-111.png 500w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-1-111-300x300.png 300w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-1-111-150x150.png 150w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Force Of Friction force of friction by Delta publications key notes : What is Friction? Types of Friction: Static Friction: This type of friction prevents an object from moving when a force is applied but the object doesn&#8217;t move. Kinetic Friction: This type of friction opposes the motion of an object already in motion. Rolling<a class=\"more-link\" href=\"https:\/\/8thclass.deltapublications.in\/index.php\/s-12-a-force-of-friction\/\">Continue reading <span class=\"screen-reader-text\">&#8220;s-12.a Force Of Friction&#8221;<\/span><\/a><\/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-3957","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\/3957","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=3957"}],"version-history":[{"count":33,"href":"https:\/\/8thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3957\/revisions"}],"predecessor-version":[{"id":21245,"href":"https:\/\/8thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3957\/revisions\/21245"}],"wp:attachment":[{"href":"https:\/\/8thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/media?parent=3957"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}