{"id":3711,"date":"2023-01-09T10:19:25","date_gmt":"2023-01-09T10:19:25","guid":{"rendered":"https:\/\/9thclass.deltapublications.in\/?page_id=3711"},"modified":"2024-10-23T09:45:08","modified_gmt":"2024-10-23T09:45:08","slug":"s-10-b-free-fall","status":"publish","type":"page","link":"https:\/\/9thclass.deltapublications.in\/index.php\/s-10-b-free-fall\/","title":{"rendered":"S-10.b Free Fall"},"content":{"rendered":"\n<h2 class=\"wp-block-heading has-text-align-center has-text-color\" style=\"color:#00056d;text-transform:uppercase\"><strong>Free Fall<\/strong><\/h2>\n\n\n\n<p class=\"has-text-color has-link-color has-huge-font-size wp-elements-1b66da20fd6ce2f6c501f5f1f826f2fd\" style=\"color:#74008b;text-transform:capitalize\">Key notes :<\/p>\n\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-dd5e9fa1637f540e576f2bcb041de8f1\" style=\"color:#000060\"><strong>Definition of Free Fall<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"has-large-font-size\">Free fall is the motion of an object under the influence of gravitational force only, with no other forces acting on it (e.g., air resistance).<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-74ed4f1554fbefb1362ab3c474f328ba\" style=\"color:#000060\"><strong>Gravitational Acceleration (g)<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"has-large-font-size\">The acceleration due to gravity on Earth is approximately 9.8\u2009m\/s<sup>2<\/sup> This means the velocity of an object in free fall increases by 9.8\u2009m\/s every second.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-e83c8a61a6ffc093dbea7fe16550234a\" style=\"color:#000060\"><strong>Neglecting Air Resistance<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"has-large-font-size\">In free fall, air resistance is usually neglected. If air resistance is present, it slows the object down, and the fall is no longer &#8220;free.&#8221;<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-57d119b9f57d18ba54fb3d56c3c57b38\" style=\"color:#000060\"><strong>Effect of Mass on Free Fall<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"has-large-font-size\">In the absence of air resistance, all objects, regardless of their mass, fall at the same rate. This was famously demonstrated by Galileo at the Leaning Tower of Pisa.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-3a72d9f50d96cf68ad4f03dd022ed021\" style=\"color:#000060\"><strong>Equations of Motion in Free Fall<\/strong>:<\/p>\n\n\n\n<ul class=\"has-large-font-size wp-block-list\">\n<li>The equations of motion for uniformly accelerated objects apply to free fall, where the acceleration aaa is replaced by g:<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"391\" height=\"352\" src=\"https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2024\/10\/image-7.png\" alt=\"\" class=\"wp-image-15617\" style=\"width:374px;height:auto\" srcset=\"https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2024\/10\/image-7.png 391w, https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2024\/10\/image-7-300x270.png 300w\" sizes=\"auto, (max-width: 391px) 100vw, 391px\" \/><\/figure>\n\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-3a692fcce6f46926bd35e3cd6ff0fc2d\" style=\"color:#000060\"><strong>Free Fall from Rest<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"has-large-font-size\">If an object starts from rest (initial velocity u = 0), its speed increases continuously as it falls due to gravity.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-b146a56280797c87d38cbe0bde071cde\" style=\"color:#000060\"><strong>Terminal Velocity<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"has-large-font-size\">In real-world situations, an object eventually reaches terminal velocity, where the force of air resistance equals the force of gravity, and the object falls at a constant speed.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-ea7a8391cedfeb89731d3162e25972ac\" style=\"color:#000060\"><strong>Free Fall and Weightlessness<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"has-large-font-size\">During free fall, objects experience apparent weightlessness because there is no support force acting on them.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-5542fbdc00dc0700866fcf07a64a0047\" style=\"color:#000060\"><strong>Examples of Free Fall<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"has-large-font-size\">Dropping a stone from a cliff, a skydiver before opening the parachute (if air resistance is neglected), or astronauts in orbit experiencing microgravity conditions.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-3a66184bb4b330de91d5845550c249d5\" style=\"color:#000060\"><strong>Real-World Applications<\/strong>:<\/p>\n\n\n\n<ul class=\"has-large-font-size wp-block-list\">\n<li>Free fall is studied in designing parachutes, amusement park rides, and space travel, where gravitational effects play a significant role.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-color has-large-font-size\" style=\"color:#d90000\">Let&#8217;s practice!<\/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\/77180\/807\/865\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-2-43.png\" alt=\"\" class=\"wp-image-6468\" srcset=\"https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-2-43.png 500w, https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-2-43-300x300.png 300w, https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-2-43-150x150.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\/80486\/750\/121\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-1-45.png\" alt=\"\" class=\"wp-image-6469\" srcset=\"https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-1-45.png 500w, https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-1-45-300x300.png 300w, https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-1-45-150x150.png 150w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Free Fall Key notes : Definition of Free Fall: Gravitational Acceleration (g): Neglecting Air Resistance: Effect of Mass on Free Fall: Equations of Motion in Free Fall: Free Fall from Rest: Terminal Velocity: Free Fall and Weightlessness: Examples of Free Fall: Real-World Applications: 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-3711","page","type-page","status-publish","hentry","entry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/9thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3711","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=3711"}],"version-history":[{"count":12,"href":"https:\/\/9thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3711\/revisions"}],"predecessor-version":[{"id":15643,"href":"https:\/\/9thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3711\/revisions\/15643"}],"wp:attachment":[{"href":"https:\/\/9thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/media?parent=3711"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}