{"id":3941,"date":"2023-01-09T10:40:05","date_gmt":"2023-01-09T10:40:05","guid":{"rendered":"https:\/\/8thclass.deltapublications.in\/?page_id=3941"},"modified":"2024-12-31T09:51:39","modified_gmt":"2024-12-31T09:51:39","slug":"s-11-c-exploring-forces","status":"publish","type":"page","link":"https:\/\/8thclass.deltapublications.in\/index.php\/s-11-c-exploring-forces\/","title":{"rendered":"s-11.c Exploring Forces"},"content":{"rendered":"\n<h2 class=\"wp-block-heading has-text-align-center has-text-color has-huge-font-size\" style=\"color:#00056d;text-transform:uppercase\"><strong>Exploring Forces<\/strong><\/h2>\n\n\n\n<p class=\"has-text-color has-link-color has-huge-font-size wp-elements-c94a149b099fb3f23f355c7448aa9d47\" style=\"color:#74008b\"><strong>key notes:<\/strong><\/p>\n\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-3275665349822fd288bce8e9763ef8dc\" style=\"color:#000060\"><strong>1. What Are Forces?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>A <strong>force<\/strong> is a push or pull acting on an object.<\/li>\n\n\n\n<li>Forces can cause objects to:\n<ul class=\"wp-block-list\">\n<li>Start moving.<\/li>\n\n\n\n<li>Stop moving.<\/li>\n\n\n\n<li>Change direction.<\/li>\n\n\n\n<li>Change shape.<\/li>\n\n\n\n<li>Change speed.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h4 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-c3ba4210ce2b907ff13892867d059547\" style=\"color:#000060\"><strong>2. Types of Forces<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Contact Forces<\/strong>: Forces that act when two objects are physically touching.\n<ul class=\"wp-block-list\">\n<li>Examples: Friction, tension, normal force, air resistance.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Non-contact Forces<\/strong>: Forces that act even when objects are not touching.\n<ul class=\"wp-block-list\">\n<li>Examples: Gravitational force, magnetic force, electrostatic force.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h4 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-73a9bba63ef1578af6ae53e53aa6d0a7\" style=\"color:#000060\"><strong>3. Measuring Forces<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>Force is measured in <strong>Newtons (N)<\/strong> using a spring balance.<\/li>\n\n\n\n<li>It is a vector quantity, meaning it has both magnitude and direction.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h4 class=\"wp-block-heading has-text-color has-link-color wp-elements-b4fd273b6cab4a08b24688fa58b2d0e7\" style=\"color:#000060\"><strong>4. Effects of Forces<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>Forces can:\n<ul class=\"wp-block-list\">\n<li>Change the motion of an object (speed up, slow down, stop, or turn).<\/li>\n\n\n\n<li>Change the shape of an object (stretch, compress, or deform).<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h4 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-c839919b291bba624f19c5b7f0a8e9ee\" style=\"color:#000060\"><strong>5. Balanced and Unbalanced Forces<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Balanced Forces<\/strong>: When the forces acting on an object are equal in size but opposite in direction, they cancel each other out, and the object remains at rest or moves at a constant speed.<\/li>\n\n\n\n<li><strong>Unbalanced Forces<\/strong>: When the forces acting on an object are not equal, they cause a change in the object&#8217;s motion.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h4 class=\"wp-block-heading has-text-color has-link-color wp-elements-3562310f5a04aa12cac031b07bc809fc\" style=\"color:#000060\"><strong>6. Newton\u2019s Laws of Motion<\/strong><\/h4>\n\n\n\n<ol class=\"wp-block-list has-large-font-size\">\n<li><strong>First Law (Law of Inertia)<\/strong>:\n<ul class=\"wp-block-list\">\n<li>An object will remain at rest or in uniform motion unless acted upon by an external force.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Second Law<\/strong>:\n<ul class=\"wp-block-list\">\n<li>The force acting on an object is equal to the mass of the object multiplied by its acceleration.<\/li>\n\n\n\n<li>Formula: F=ma<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Third Law<\/strong>:\n<ul class=\"wp-block-list\">\n<li>For every action, there is an equal and opposite reaction.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h4 class=\"wp-block-heading has-text-color has-link-color wp-elements-5189414ca485a59e8fc835d2434d5565\" style=\"color:#000060\"><strong>7. Friction<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>A force that opposes the motion of an object.<\/li>\n\n\n\n<li>Types of Friction:\n<ul class=\"wp-block-list\">\n<li><strong>Static Friction<\/strong>: Acts on stationary objects.<\/li>\n\n\n\n<li><strong>Kinetic Friction<\/strong>: Acts on moving objects.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Ways to reduce friction: Lubrication, smoothing surfaces, using wheels.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h4 class=\"wp-block-heading has-text-color has-link-color wp-elements-3e00c69b82b9536eb5590dd617ca02aa\" style=\"color:#000060\"><strong>8. Gravity<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>A force of attraction between two objects with mass.<\/li>\n\n\n\n<li>The strength of gravity depends on:\n<ul class=\"wp-block-list\">\n<li>The masses of the objects.<\/li>\n\n\n\n<li>The distance between them.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Acceleration due to gravity on Earth: 9.8\u2009m\/s<sup>2<\/sup>.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h4 class=\"wp-block-heading has-text-color has-link-color wp-elements-15f8ac42c0c2005fe5ccbf35fb62ee5a\" style=\"color:#000060\"><strong>9. Pressure<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>Force applied over an area.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"382\" height=\"57\" src=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/12\/image-18.png\" alt=\"\" class=\"wp-image-19576\" srcset=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/12\/image-18.png 382w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2024\/12\/image-18-300x45.png 300w\" sizes=\"auto, (max-width: 382px) 100vw, 382px\" \/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"has-large-font-size\">Examples:\n<ul class=\"wp-block-list\">\n<li>Atmospheric pressure.<\/li>\n\n\n\n<li>Pressure in liquids and gases.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h4 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-049727cf01e19c344638575caddcba1a\" style=\"color:#000060\"><strong>10. Applications of Forces<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>Bridges and buildings: Designed to withstand forces.<\/li>\n\n\n\n<li>Vehicles: Use friction (brakes) and air resistance (aerodynamics).<\/li>\n\n\n\n<li>Sports: Forces determine speed, direction, and impact.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h4 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-a8584a25edeb250aff15ea550aebc4bb\" style=\"color:#000060\"><strong>11. Experiment Ideas<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>Measure the force needed to move an object on different surfaces (study of friction).<\/li>\n\n\n\n<li>Observe the effect of gravity by dropping objects of different weights.<\/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\/82626\/974\/992\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-2-104.png\" alt=\"\" class=\"wp-image-7835\" srcset=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-2-104.png 500w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-2-104-300x300.png 300w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-2-104-150x150.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\/81648\/936\/800\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-1-103.png\" alt=\"\" class=\"wp-image-7836\" srcset=\"https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-1-103.png 500w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-1-103-300x300.png 300w, https:\/\/8thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-1-103-150x150.png 150w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Exploring Forces key notes: 1. What Are Forces? 2. Types of Forces 3. Measuring Forces 4. Effects of Forces 5. Balanced and Unbalanced Forces 6. Newton\u2019s Laws of Motion 7. Friction 8. Gravity 9. Pressure 10. Applications of Forces 11. Experiment Ideas 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-3941","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\/3941","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=3941"}],"version-history":[{"count":15,"href":"https:\/\/8thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3941\/revisions"}],"predecessor-version":[{"id":19577,"href":"https:\/\/8thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3941\/revisions\/19577"}],"wp:attachment":[{"href":"https:\/\/8thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/media?parent=3941"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}