{"id":22222,"date":"2022-01-25T17:02:51","date_gmt":"2022-01-25T11:32:51","guid":{"rendered":"https:\/\/infinitylearn.com\/surge\/?p=22222"},"modified":"2022-01-25T17:02:51","modified_gmt":"2022-01-25T11:32:51","slug":"work-energy-and-power-class-11-notes-physics-chapter-6","status":"publish","type":"post","link":"https:\/\/infinitylearn.com\/surge\/study-materials\/physics\/work-energy-and-power-class-11-notes-physics-chapter-6\/","title":{"rendered":"Work, Energy and Power Class 11 Notes Physics Chapter 6"},"content":{"rendered":"<h2>Work, Energy and Power Class 11 Notes Physics Chapter 6<\/h2>\n<p>\u2022 Work is said to be done when a force applied on the body displaces the body through a certain distance in the direction of applied force.<br \/>\nIt is measured by the product of the force and the distance moved in the direction of the force, i.e., W = F-S<br \/>\n\u2022 If an object undergoes a displacement \u2018S\u2019 along a straight line while acted on a force F that makes an angle 0 with S as shown.<br \/>\nThe work done W by the agent is the product of the component of force in the direction of displacement and the magnitude of displacement.<br \/>\n<img loading=\"lazy\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/32588297892_4484c10d92_o.png\" alt=\"work-energy-and-power-cbse-notes-for-class-11-physics-1\" width=\"866\" height=\"399\" \/><br \/>\n\u2022 If we plot a graph between force applied and the displacement, then work done can be obtained by finding the area under the F-s graph.<br \/>\n\u2022 If a spring is stretched or compressed by a small distance from its unstretched configuration, the spring will exert a force on the block given by<br \/>\nF = -kx, where x is compression or elongation in spring, k is a constant called spring constant whose value depends inversely on unstretched length and the nature of material of spring.<br \/>\nThe negative sign indicates that the direction of the spring force is opposite to x, the displacement of the free-end.<br \/>\n<img loading=\"lazy\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/31898719074_aa46ae7ddc_o.png\" alt=\"work-energy-and-power-cbse-notes-for-class-11-physics-2\" width=\"796\" height=\"164\" \/><br \/>\n<strong>\u2022 Energy<\/strong><br \/>\nThe energy of a body is its capacity to do work. Anything which is able to do work is said to possess energy. Energy is measured in the same unit as that of work, namely, Joule.<br \/>\nMechanical energy is of two types: Kinetic energy and Potential energy.<br \/>\n<strong>\u2022 Kinetic Energy<\/strong><br \/>\nThe energy possessed by a body by virtue of its motion is known as its kinetic energy.<br \/>\nFor an object of mass m and having a velocity v, the kinetic energy is given by:<br \/>\nK.E. or K = 1\/2 mv<sub> <\/sub><sup>2<\/sup><br \/>\n<strong>\u2022 Potential Energy<\/strong><br \/>\nThe energy possessed by a body by virtue of its position or condition is known as its potential energy.<br \/>\nThere are two common forms of potential energy: gravitational and elastic.<br \/>\n\u2014&gt; Gravitational potential energy of a body is the energy possessed by the body by virtue of its position above the surface of the earth.<br \/>\nIt is given by<br \/>\n(U)P.E. = mgh<br \/>\nwhere m \u2014&gt; mass of a body<br \/>\ng \u2014&gt; acceleration due to gravity on the surface of earth. h \u2014&gt; height through which the body is raised.<br \/>\n\u2014&gt; When an elastic body is displaced from its equilibrium position, work is needed to be done against the restoring elastic force. The work done is stored up in the body in the form of its elastic potential energy.<br \/>\nIf an elastic spring is stretched (or compressed) by a distance Y from its equilibrium position, then its elastic potential energy is given by<br \/>\nU= 1\/2 kx<sup>2<\/sup><br \/>\nwhere, k \u2014&gt; force constant of given spring<br \/>\n<strong>\u2022 Work-Energy Theorem<\/strong><br \/>\nAccording to work-energy theorem, the work done by a force on a body is equal to the change in kinetic energy of the body.<br \/>\n<img loading=\"lazy\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/32588297782_6290514a25_o.png\" alt=\"work-energy-and-power-cbse-notes-for-class-11-physics-3\" width=\"795\" height=\"119\" \/><br \/>\n<strong>\u2022 The Law of Conservation of Energy<\/strong><br \/>\nAccording to the law of conservation of energy, the total energy of an isolated system does not change. Energy may be transformed from one form to another but the total energy of an isolated system remains constant.<br \/>\n<strong>\u2022 Energy can neither be created, nor destroyed.<\/strong><br \/>\n\u2022 Besides mechanical energy, the energy may manifest itself in many other forms. Some of these forms are: thermal energy, electrical energy, chemical energy, visual light energy, nuclear energy etc.<br \/>\n<strong>\u2022 Equivalence of Mass and Energy<\/strong><br \/>\nAccording to Einstein, mass and energy are inter-convertible. That is, mass can be converted into energy and energy can be converted into mass.<br \/>\n<img loading=\"lazy\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/32701146106_4d5c33b138_o.png\" alt=\"work-energy-and-power-cbse-notes-for-class-11-physics-4\" width=\"872\" height=\"511\" \/><br \/>\n<strong>\u2022 Collision<\/strong><br \/>\nCollision is defined as an isolated event in which two or more colliding bodies exert relatively strong forces on each other for a relatively short time.<br \/>\nCollision between particles have been divided broadly into two types.<br \/>\n(i) Elastic collisions (ii) Inelastic collisions<br \/>\n<strong>\u2022 Elastic Collision<\/strong><br \/>\nA collision between two particles or bodies is said to be elastic if both the linear momentum and the kinetic energy of the system remain conserved.<br \/>\nExample: Collisions between atomic particles, atoms, marble balls and billiard balls.<br \/>\n<strong>\u2022 Inelastic Collision<\/strong><br \/>\nA collision is said to be inelastic if the linear momentum of the system remains conserved but its kinetic energy is not conserved.<br \/>\nExample: When we drop a ball of wet putty on to the floor then the collision between ball and floor is an inelastic collision.<br \/>\n\u2022 Collision is said to be one dimensional, if the colliding particles, move along the same straight line path both before as well as after the collision.<br \/>\n\u2022 In one dimensional elastic collision, the relative velocity of approach before collision is equal to. the relative velocity of separation after collision.<br \/>\n<img loading=\"lazy\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/32618242721_9f158fce46_o.png\" alt=\"work-energy-and-power-cbse-notes-for-class-11-physics-5\" width=\"888\" height=\"115\" \/><br \/>\n<strong>\u2022 <\/strong><strong>Coefficient of Restitution or Coefficient of Resilience<\/strong><br \/>\nCoefficient of restitution is defined as the ratio of relative velocity of separation after collision to the relative velocity of approach before collision.<br \/>\n<img loading=\"lazy\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/31898718654_909047fb1a_o.png\" alt=\"work-energy-and-power-cbse-notes-for-class-11-physics-6\" width=\"359\" height=\"94\" \/><br \/>\n<strong>\u2022 Elastic and Inelastic Collisions in Two Dimensions<\/strong><br \/>\n<img loading=\"lazy\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/32618242561_4bfb368e87_o.png\" alt=\"work-energy-and-power-cbse-notes-for-class-11-physics-7\" width=\"873\" height=\"677\" \/><br \/>\n<img loading=\"lazy\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/32618242511_df6727e735_o.png\" alt=\"work-energy-and-power-cbse-notes-for-class-11-physics-8\" width=\"853\" height=\"543\" \/><br \/>\n<img loading=\"lazy\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/31927704213_d586839848_o.png\" alt=\"work-energy-and-power-cbse-notes-for-class-11-physics-9\" width=\"866\" height=\"612\" \/><br \/>\n<img loading=\"lazy\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/31927704133_a9ea4497b6_o.png\" alt=\"work-energy-and-power-cbse-notes-for-class-11-physics-10\" width=\"878\" height=\"350\" \/><br \/>\n<strong>\u2022 Non-conservative Forces<\/strong><br \/>\nA force is said to be non-conservative if the work done in moving from one point to another depends upon the the path followed.<br \/>\nLet W, be the work done in moving from A to B following the path 1. W2 through the path 2 and W3 through the path 3. Fig. (i).<br \/>\n<img loading=\"lazy\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/32618242371_0816bce17e_o.png\" alt=\"work-energy-and-power-cbse-notes-for-class-11-physics-11\" width=\"856\" height=\"453\" \/><br \/>\nExamples of non-conservative forces are :<br \/>\n(i) Force of friction (ii) Viscus force<br \/>\nLow of conservation of energy holds goods for both conservative and non-conservative forces.<br \/>\n<img loading=\"lazy\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/32618242181_70860219a4_o.png\" alt=\"work-energy-and-power-cbse-notes-for-class-11-physics-12\" width=\"880\" height=\"469\" \/><br \/>\n<img loading=\"lazy\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/31927704043_89d2a8d49a_o.png\" alt=\"work-energy-and-power-cbse-notes-for-class-11-physics-13\" width=\"867\" height=\"551\" \/><br \/>\n<img loading=\"lazy\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/32618242051_02a67b9be0_o.png\" alt=\"work-energy-and-power-cbse-notes-for-class-11-physics-14\" width=\"766\" height=\"275\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Work, Energy and Power Class 11 Notes Physics Chapter 6 \u2022 Work is said to be done when a force [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_focuskw":"","_yoast_wpseo_title":"","_yoast_wpseo_metadesc":"Get Work, Energy and Power Class 11 Notes Physics Chapter 6 to infinity learn","custom_permalink":"study-materials\/physics\/work-energy-and-power-class-11-notes-physics-chapter-6\/"},"categories":[4,21],"tags":[],"table_tags":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Work, Energy and Power Class 11 Notes Physics Chapter 6 - Infinity Learn by Sri Chaitanya<\/title>\n<meta name=\"description\" content=\"Get Work, Energy and Power Class 11 Notes Physics Chapter 6 to infinity learn\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/infinitylearn.com\/surge\/study-materials\/physics\/work-energy-and-power-class-11-notes-physics-chapter-6\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Work, Energy and Power Class 11 Notes Physics Chapter 6 - Infinity Learn by Sri Chaitanya\" \/>\n<meta property=\"og:description\" content=\"Get Work, Energy and Power Class 11 Notes Physics Chapter 6 to infinity learn\" \/>\n<meta property=\"og:url\" content=\"https:\/\/infinitylearn.com\/surge\/study-materials\/physics\/work-energy-and-power-class-11-notes-physics-chapter-6\/\" \/>\n<meta property=\"og:site_name\" content=\"Infinity Learn by Sri Chaitanya\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/InfinityLearn.SriChaitanya\/\" \/>\n<meta property=\"article:published_time\" content=\"2022-01-25T11:32:51+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/32588297892_4484c10d92_o.png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@InfinityLearn_\" \/>\n<meta name=\"twitter:site\" content=\"@InfinityLearn_\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Prasad Gupta\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Work, Energy and Power Class 11 Notes Physics Chapter 6 - Infinity Learn by Sri Chaitanya","description":"Get Work, Energy and Power Class 11 Notes Physics Chapter 6 to infinity learn","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/infinitylearn.com\/surge\/study-materials\/physics\/work-energy-and-power-class-11-notes-physics-chapter-6\/","og_locale":"en_US","og_type":"article","og_title":"Work, Energy and Power Class 11 Notes Physics Chapter 6 - Infinity Learn by Sri Chaitanya","og_description":"Get Work, Energy and Power Class 11 Notes Physics Chapter 6 to infinity learn","og_url":"https:\/\/infinitylearn.com\/surge\/study-materials\/physics\/work-energy-and-power-class-11-notes-physics-chapter-6\/","og_site_name":"Infinity Learn by Sri Chaitanya","article_publisher":"https:\/\/www.facebook.com\/InfinityLearn.SriChaitanya\/","article_published_time":"2022-01-25T11:32:51+00:00","og_image":[{"url":"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/32588297892_4484c10d92_o.png"}],"twitter_card":"summary_large_image","twitter_creator":"@InfinityLearn_","twitter_site":"@InfinityLearn_","twitter_misc":{"Written by":"Prasad Gupta","Est. reading time":"4 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Organization","@id":"https:\/\/infinitylearn.com\/surge\/#organization","name":"Infinity Learn","url":"https:\/\/infinitylearn.com\/surge\/","sameAs":["https:\/\/www.facebook.com\/InfinityLearn.SriChaitanya\/","https:\/\/www.instagram.com\/infinitylearn_by_srichaitanya\/","https:\/\/www.linkedin.com\/company\/infinity-learn-by-sri-chaitanya\/","https:\/\/www.youtube.com\/c\/InfinityLearnEdu","https:\/\/twitter.com\/InfinityLearn_"],"logo":{"@type":"ImageObject","@id":"https:\/\/infinitylearn.com\/surge\/#logo","inLanguage":"en-US","url":"","contentUrl":"","caption":"Infinity Learn"},"image":{"@id":"https:\/\/infinitylearn.com\/surge\/#logo"}},{"@type":"WebSite","@id":"https:\/\/infinitylearn.com\/surge\/#website","url":"https:\/\/infinitylearn.com\/surge\/","name":"Infinity Learn by Sri Chaitanya","description":"Surge","publisher":{"@id":"https:\/\/infinitylearn.com\/surge\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/infinitylearn.com\/surge\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":"ImageObject","@id":"https:\/\/infinitylearn.com\/surge\/study-materials\/physics\/work-energy-and-power-class-11-notes-physics-chapter-6\/#primaryimage","inLanguage":"en-US","url":"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/32588297892_4484c10d92_o.png?v=1642486363","contentUrl":"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/32588297892_4484c10d92_o.png?v=1642486363","width":866,"height":399},{"@type":"WebPage","@id":"https:\/\/infinitylearn.com\/surge\/study-materials\/physics\/work-energy-and-power-class-11-notes-physics-chapter-6\/#webpage","url":"https:\/\/infinitylearn.com\/surge\/study-materials\/physics\/work-energy-and-power-class-11-notes-physics-chapter-6\/","name":"Work, Energy and Power Class 11 Notes Physics Chapter 6 - Infinity Learn by Sri Chaitanya","isPartOf":{"@id":"https:\/\/infinitylearn.com\/surge\/#website"},"primaryImageOfPage":{"@id":"https:\/\/infinitylearn.com\/surge\/study-materials\/physics\/work-energy-and-power-class-11-notes-physics-chapter-6\/#primaryimage"},"datePublished":"2022-01-25T11:32:51+00:00","dateModified":"2022-01-25T11:32:51+00:00","description":"Get Work, Energy and Power Class 11 Notes Physics Chapter 6 to infinity learn","breadcrumb":{"@id":"https:\/\/infinitylearn.com\/surge\/study-materials\/physics\/work-energy-and-power-class-11-notes-physics-chapter-6\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/infinitylearn.com\/surge\/study-materials\/physics\/work-energy-and-power-class-11-notes-physics-chapter-6\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/infinitylearn.com\/surge\/study-materials\/physics\/work-energy-and-power-class-11-notes-physics-chapter-6\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/infinitylearn.com\/surge\/"},{"@type":"ListItem","position":2,"name":"Work, Energy and Power Class 11 Notes Physics Chapter 6"}]},{"@type":"Article","@id":"https:\/\/infinitylearn.com\/surge\/study-materials\/physics\/work-energy-and-power-class-11-notes-physics-chapter-6\/#article","isPartOf":{"@id":"https:\/\/infinitylearn.com\/surge\/study-materials\/physics\/work-energy-and-power-class-11-notes-physics-chapter-6\/#webpage"},"author":{"@id":"https:\/\/infinitylearn.com\/surge\/#\/schema\/person\/143c89c9c2f5e56ed91f96dde47b0b05"},"headline":"Work, Energy and Power Class 11 Notes Physics Chapter 6","datePublished":"2022-01-25T11:32:51+00:00","dateModified":"2022-01-25T11:32:51+00:00","mainEntityOfPage":{"@id":"https:\/\/infinitylearn.com\/surge\/study-materials\/physics\/work-energy-and-power-class-11-notes-physics-chapter-6\/#webpage"},"wordCount":897,"publisher":{"@id":"https:\/\/infinitylearn.com\/surge\/#organization"},"image":{"@id":"https:\/\/infinitylearn.com\/surge\/study-materials\/physics\/work-energy-and-power-class-11-notes-physics-chapter-6\/#primaryimage"},"thumbnailUrl":"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/32588297892_4484c10d92_o.png","articleSection":["Physics","Study Materials"],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/infinitylearn.com\/surge\/#\/schema\/person\/143c89c9c2f5e56ed91f96dde47b0b05","name":"Prasad Gupta","image":{"@type":"ImageObject","@id":"https:\/\/infinitylearn.com\/surge\/#personlogo","inLanguage":"en-US","url":"https:\/\/secure.gravatar.com\/avatar\/200104b443e586c76c46cadc113d931c?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/200104b443e586c76c46cadc113d931c?s=96&d=mm&r=g","caption":"Prasad Gupta"},"url":"https:\/\/infinitylearn.com\/surge\/author\/prasad\/"}]}},"_links":{"self":[{"href":"https:\/\/infinitylearn.com\/surge\/wp-json\/wp\/v2\/posts\/22222"}],"collection":[{"href":"https:\/\/infinitylearn.com\/surge\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/infinitylearn.com\/surge\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/infinitylearn.com\/surge\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/infinitylearn.com\/surge\/wp-json\/wp\/v2\/comments?post=22222"}],"version-history":[{"count":0,"href":"https:\/\/infinitylearn.com\/surge\/wp-json\/wp\/v2\/posts\/22222\/revisions"}],"wp:attachment":[{"href":"https:\/\/infinitylearn.com\/surge\/wp-json\/wp\/v2\/media?parent=22222"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/infinitylearn.com\/surge\/wp-json\/wp\/v2\/categories?post=22222"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/infinitylearn.com\/surge\/wp-json\/wp\/v2\/tags?post=22222"},{"taxonomy":"table_tags","embeddable":true,"href":"https:\/\/infinitylearn.com\/surge\/wp-json\/wp\/v2\/table_tags?post=22222"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}