{"id":3701,"date":"2023-01-09T10:18:07","date_gmt":"2023-01-09T10:18:07","guid":{"rendered":"https:\/\/9thclass.deltapublications.in\/?page_id=3701"},"modified":"2025-08-12T06:36:46","modified_gmt":"2025-08-12T06:36:46","slug":"s-9-c-inertia-and-mass","status":"publish","type":"page","link":"https:\/\/9thclass.deltapublications.in\/index.php\/s-9-c-inertia-and-mass\/","title":{"rendered":"S-9.c Inertia And Mass"},"content":{"rendered":"\n<h2 class=\"wp-block-heading has-text-align-center has-text-color\" style=\"color:#00056d;text-transform:uppercase\"><strong>Inertia And Mass<\/strong><\/h2>\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-e495bb531b28ec7f9cf1d0074483284c\" style=\"color:#000060\"><strong>Definition of Inertia:<\/strong><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"602\" height=\"500\" src=\"https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2024\/08\/image-74.png\" alt=\"\" class=\"wp-image-15071\" style=\"width:318px;height:auto\" srcset=\"https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2024\/08\/image-74.png 602w, https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2024\/08\/image-74-300x249.png 300w\" sizes=\"auto, (max-width: 602px) 100vw, 602px\" \/><\/figure><\/div>\n\n\n<ul class=\"wp-block-list\">\n<li class=\"has-large-font-size\">Inertia is a property of matter that describes the resistance of any physical object to any change in its state of motion. This means an object at rest will stay at rest, and an object in motion will stay in motion unless acted upon by an external force.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-b7216d4c57bdad1538a400aad59d37b0\" style=\"color:#000060\"><strong>Types of Inertia:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Inertia of Rest<\/strong>: The tendency of an object to remain at rest unless acted upon by an external force. For example, a book lying on a table will remain there until someone moves it.<\/li>\n\n\n\n<li><strong>Inertia of Motion<\/strong>: The tendency of a moving object to continue moving in a straight line at constant speed unless acted upon by an external force. For instance, a moving car will continue moving forward even if you take your foot off the gas pedal until forces like friction and air resistance slow it down.<\/li>\n\n\n\n<li><strong>Inertia of Direction<\/strong>: The tendency of an object to resist a change in its direction of motion. A car making a sharp turn at high speed will continue moving in the original direction due to inertia.<\/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:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2025\/08\/Untitled-design-2025-08-12T115650.034-1024x579.png\" alt=\"\" class=\"wp-image-17336\" style=\"width:517px;height:auto\" srcset=\"https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2025\/08\/Untitled-design-2025-08-12T115650.034-1024x579.png 1024w, https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2025\/08\/Untitled-design-2025-08-12T115650.034-300x170.png 300w, https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2025\/08\/Untitled-design-2025-08-12T115650.034-768x434.png 768w, https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2025\/08\/Untitled-design-2025-08-12T115650.034.png 1472w\" 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-0e49ebe5303acc32292d533f8a948310\" style=\"color:#000060\"><strong>Relationship Between Mass and Inertia:<\/strong><\/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=\"579\" src=\"https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2025\/08\/Untitled-design-2025-08-12T120023.481-1-1024x579.png\" alt=\"\" class=\"wp-image-17339\" style=\"width:488px;height:auto\" srcset=\"https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2025\/08\/Untitled-design-2025-08-12T120023.481-1-1024x579.png 1024w, https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2025\/08\/Untitled-design-2025-08-12T120023.481-1-300x170.png 300w, https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2025\/08\/Untitled-design-2025-08-12T120023.481-1-768x434.png 768w, https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2025\/08\/Untitled-design-2025-08-12T120023.481-1.png 1472w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<p class=\"has-large-font-size\">Inertia is directly proportional to the mass of an object. This means that objects with greater mass have more inertia. They resist changes in their motion more than objects with less mass.<\/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=\"579\" src=\"https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2025\/08\/Untitled-design-2025-08-12T120156.261-1024x579.png\" alt=\"\" class=\"wp-image-17340\" style=\"width:475px;height:auto\" srcset=\"https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2025\/08\/Untitled-design-2025-08-12T120156.261-1024x579.png 1024w, https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2025\/08\/Untitled-design-2025-08-12T120156.261-300x170.png 300w, https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2025\/08\/Untitled-design-2025-08-12T120156.261-768x434.png 768w, https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2025\/08\/Untitled-design-2025-08-12T120156.261.png 1472w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<p class=\"has-large-font-size\">For example, it is harder to push a heavy car from rest than a light bicycle because the car has more mass and, therefore, more inertia.<\/p>\n\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-b5c8f8a8006319f9a293c8965a3960a0\" style=\"color:#000060\"><strong>Examples of Inertia:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>A passenger in a car lurching forward when the car suddenly stops is due to the inertia of motion. The passenger&#8217;s body tends to keep moving forward even though the car has stopped.<\/li>\n\n\n\n<li>A ball rolling on the ground gradually comes to a stop because of external forces like friction, which overcome its inertia of motion.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-125b65058a6ab48b79605d90bef17174\" style=\"color:#000060\"><strong>Newton\u2019s First Law of Motion (Law of Inertia):<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>This law states that an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force. It is often summarized as, &#8220;An object in motion stays in motion, and an object at rest stays at rest, unless acted upon by an external force.&#8221;<\/li>\n<\/ul>\n\n\n\n<div class=\"wp-block-group has-large-font-size\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<p class=\"has-text-color\" style=\"color:#d90000\">Let&#8217;s practice!<\/p>\n<\/div><\/div>\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\/76656\/960\/222\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-2-39.png\" alt=\"\" class=\"wp-image-6456\" srcset=\"https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-2-39.png 500w, https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-2-39-300x300.png 300w, https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-2-39-150x150.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\/77032\/216\/150\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-1-41.png\" alt=\"\" class=\"wp-image-6457\" srcset=\"https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-1-41.png 500w, https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-1-41-300x300.png 300w, https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-1-41-150x150.png 150w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Inertia And Mass key notes : Definition of Inertia: Types of Inertia: Relationship Between Mass and Inertia: Inertia is directly proportional to the mass of an object. This means that objects with greater mass have more inertia. They resist changes in their motion more than objects with less mass. For example, it is harder to<a class=\"more-link\" href=\"https:\/\/9thclass.deltapublications.in\/index.php\/s-9-c-inertia-and-mass\/\">Continue reading <span class=\"screen-reader-text\">&#8220;S-9.c Inertia And Mass&#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-3701","page","type-page","status-publish","hentry","entry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/9thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3701","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/9thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/9thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/9thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/9thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/comments?post=3701"}],"version-history":[{"count":13,"href":"https:\/\/9thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3701\/revisions"}],"predecessor-version":[{"id":17341,"href":"https:\/\/9thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3701\/revisions\/17341"}],"wp:attachment":[{"href":"https:\/\/9thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/media?parent=3701"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}