{"id":6606,"date":"2026-03-31T06:16:20","date_gmt":"2026-03-31T00:46:20","guid":{"rendered":"https:\/\/enlightify.org\/?p=6606"},"modified":"2026-06-13T17:36:32","modified_gmt":"2026-06-13T12:06:32","slug":"acceleration-and-retardation","status":"publish","type":"post","link":"https:\/\/enlightify.org\/hi\/acceleration-and-retardation\/","title":{"rendered":"Acceleration and Retardation"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"6606\" class=\"elementor elementor-6606\">\n\t\t\t\t<div class=\"elementor-element elementor-element-d35430d e-flex e-con-boxed e-con e-parent\" data-id=\"d35430d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-aab596e elementor-widget elementor-widget-html\" data-id=\"aab596e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h1>Acceleration and Retardation<\/h1>\n\n<h2>Acceleration and Retardation<\/h2>\n\n<p><strong>Acceleration:<\/strong> Acceleration is the rate of change of velocity with respect to time. It tells us how quickly the velocity of an object changes. Acceleration is a <strong>vector quantity<\/strong> because it has both magnitude and direction.<\/p>\n\n<p><strong>Formula of Acceleration:<\/strong><\/p>\n<p><strong>Acceleration (a) = (Final Velocity - Initial Velocity) \/ Time<\/strong><\/p>\n\n<p><strong>SI Unit of Acceleration:<\/strong> metre per second square (m\/s\u00b2)<\/p>\n\n<p><strong>Example of Acceleration:<\/strong> A car increases its velocity from 10 m\/s to 30 m\/s in 5 seconds.<\/p>\n<p><strong>Acceleration = (30 - 10) \/ 5 = 4 m\/s\u00b2<\/strong><\/p>\n\n<p><strong>Illustration of Acceleration:<\/strong><\/p>\n\n<div style=\"max-width:100%; height:auto;\">\n<svg viewbox=\"0 0 700 260\" width=\"100%\" height=\"auto\" preserveaspectratio=\"xMidYMid meet\" style=\"border:1px solid black;\">\n  <line x1=\"70\" y1=\"140\" x2=\"630\" y2=\"140\" style=\"stroke:black; stroke-width:3;\" \/>\n  <polygon points=\"630,140 617,134 617,146\" style=\"fill:black;\" \/>\n\n  <circle cx=\"120\" cy=\"140\" r=\"5\" fill=\"black\" \/>\n  <circle cx=\"520\" cy=\"140\" r=\"5\" fill=\"black\" \/>\n\n  <text x=\"95\" y=\"125\" font-size=\"15\" font-weight=\"bold\">A<\/text>\n  <text x=\"495\" y=\"125\" font-size=\"15\" font-weight=\"bold\">B<\/text>\n\n  <text x=\"105\" y=\"95\" font-size=\"15\">u = 10 m\/s<\/text>\n  <text x=\"485\" y=\"95\" font-size=\"15\">v = 30 m\/s<\/text>\n  <text x=\"305\" y=\"180\" font-size=\"15\">t = 5 s<\/text>\n\n  <rect x=\"104\" y=\"132\" width=\"32\" height=\"14\" fill=\"none\" stroke=\"black\" stroke-width=\"1.5\"\/>\n  <circle cx=\"112\" cy=\"150\" r=\"4\" fill=\"black\" \/>\n  <circle cx=\"128\" cy=\"150\" r=\"4\" fill=\"black\" \/>\n\n  <rect x=\"504\" y=\"132\" width=\"32\" height=\"14\" fill=\"none\" stroke=\"black\" stroke-width=\"1.5\"\/>\n  <circle cx=\"512\" cy=\"150\" r=\"4\" fill=\"black\" \/>\n  <circle cx=\"528\" cy=\"150\" r=\"4\" fill=\"black\" \/>\n<\/svg>\n<\/div>\n\n<hr \/>\n\n<p><strong>Retardation:<\/strong> Retardation is the rate of decrease of velocity with respect to time. It is also called <strong>negative acceleration<\/strong>. Retardation is also a <strong>vector quantity<\/strong>.<\/p>\n\n<p><strong>Formula of Retardation:<\/strong><\/p>\n<p><strong>Retardation (a) = (Final Velocity - Initial Velocity) \/ Time<\/strong><\/p>\n\n<p><strong>SI Unit of Retardation:<\/strong> metre per second square (m\/s\u00b2)<\/p>\n\n<p><strong>Example of Retardation:<\/strong> A bike slows down from 25 m\/s to 5 m\/s in 4 seconds.<\/p>\n<p><strong>Retardation = (5 - 25) \/ 4 = -5 m\/s\u00b2<\/strong><\/p>\n\n<p><strong>Illustration of Retardation:<\/strong><\/p>\n\n<div style=\"max-width:100%; height:auto;\">\n<svg viewbox=\"0 0 700 260\" width=\"100%\" height=\"auto\" preserveaspectratio=\"xMidYMid meet\" style=\"border:1px solid black;\">\n  <line x1=\"70\" y1=\"140\" x2=\"630\" y2=\"140\" style=\"stroke:black; stroke-width:3;\" \/>\n  <polygon points=\"630,140 617,134 617,146\" style=\"fill:black;\" \/>\n\n  <circle cx=\"120\" cy=\"140\" r=\"5\" fill=\"black\" \/>\n  <circle cx=\"520\" cy=\"140\" r=\"5\" fill=\"black\" \/>\n\n  <text x=\"95\" y=\"125\" font-size=\"15\" font-weight=\"bold\">A<\/text>\n  <text x=\"495\" y=\"125\" font-size=\"15\" font-weight=\"bold\">B<\/text>\n\n  <text x=\"100\" y=\"95\" font-size=\"15\">u = 25 m\/s<\/text>\n  <text x=\"490\" y=\"95\" font-size=\"15\">v = 5 m\/s<\/text>\n  <text x=\"305\" y=\"180\" font-size=\"15\">t = 4 s<\/text>\n\n  <circle cx=\"120\" cy=\"140\" r=\"10\" fill=\"none\" stroke=\"black\" stroke-width=\"1.5\" \/>\n  <circle cx=\"112\" cy=\"150\" r=\"4\" fill=\"black\" \/>\n  <circle cx=\"128\" cy=\"150\" r=\"4\" fill=\"black\" \/>\n\n  <circle cx=\"520\" cy=\"140\" r=\"10\" fill=\"none\" stroke=\"black\" stroke-width=\"1.5\" \/>\n  <circle cx=\"512\" cy=\"150\" r=\"4\" fill=\"black\" \/>\n  <circle cx=\"528\" cy=\"150\" r=\"4\" fill=\"black\" \/>\n<\/svg>\n<\/div>\n\n<hr \/>\n\n<h2>Important Points<\/h2>\n<ul>\n  <li><strong>Acceleration:<\/strong> It occurs when velocity increases or changes.<\/li>\n  <li><strong>Retardation:<\/strong> It occurs when velocity decreases.<\/li>\n  <li><strong>SI Unit:<\/strong> metre per second square (m\/s\u00b2)<\/li>\n  <li>Both acceleration and retardation are vector quantities.<\/li>\n<\/ul>\n\n<h2>Conclusion<\/h2>\n<p>\nAcceleration tells us how quickly the velocity of an object changes, while retardation tells us how quickly the velocity decreases. These concepts are very important for understanding the motion of vehicles and other moving objects.\n<\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Acceleration and Retardation Acceleration and Retardation Acceleration: Acceleration is the rate of change of velocity with respect to time. It tells us how quickly the velocity of an object changes. Acceleration is a vector quantity because it has both magnitude and direction. Formula of Acceleration: Acceleration (a) = (Final Velocity &#8211; Initial Velocity) \/ Time [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[98],"tags":[],"class_list":["post-6606","post","type-post","status-publish","format-standard","hentry","category-physics"],"_links":{"self":[{"href":"https:\/\/enlightify.org\/hi\/wp-json\/wp\/v2\/posts\/6606","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/enlightify.org\/hi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/enlightify.org\/hi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/enlightify.org\/hi\/wp-json\/wp\/v2\/users\/10"}],"replies":[{"embeddable":true,"href":"https:\/\/enlightify.org\/hi\/wp-json\/wp\/v2\/comments?post=6606"}],"version-history":[{"count":1,"href":"https:\/\/enlightify.org\/hi\/wp-json\/wp\/v2\/posts\/6606\/revisions"}],"predecessor-version":[{"id":7242,"href":"https:\/\/enlightify.org\/hi\/wp-json\/wp\/v2\/posts\/6606\/revisions\/7242"}],"wp:attachment":[{"href":"https:\/\/enlightify.org\/hi\/wp-json\/wp\/v2\/media?parent=6606"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/enlightify.org\/hi\/wp-json\/wp\/v2\/categories?post=6606"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/enlightify.org\/hi\/wp-json\/wp\/v2\/tags?post=6606"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}