{"id":92503,"date":"2025-06-01T11:26:01","date_gmt":"2025-06-01T11:26:01","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=92503"},"modified":"2025-06-01T11:26:01","modified_gmt":"2025-06-01T11:26:01","slug":"which-of-the-following-statements-about-a-body-under-equilibrium-is-ar","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-about-a-body-under-equilibrium-is-ar\/","title":{"rendered":"Which of the following statements about a body under equilibrium is\/ar"},"content":{"rendered":"<p>Which of the following statements about a body under equilibrium is\/are correct ?<\/p>\n<ul>\n<li>1. No forces are acting.<\/li>\n<li>2. A number of parallel forces may be acting.<\/li>\n<li>3. The law of moments must apply.<\/li>\n<\/ul>\n<p>Select the correct answer using the code given below :<\/p>\n<p>[amp_mcq option1=&#8221;1, 2 and 3&#8243; option2=&#8221;2 and 3 only&#8221; option3=&#8221;1 and 3 only&#8221; option4=&#8221;2 only&#8221; correct=&#8221;option2&#8243;]<\/p>\n<div class=\"psc-box-pyq-exam-year-detail\">\n<div class=\"pyq-exam\">\n<div class=\"psc-heading\">This question was previously asked in<\/div>\n<div class=\"psc-title line-ellipsis\">UPSC CISF-AC-EXE &#8211; 2018<\/div>\n<\/div>\n<div class=\"pyq-exam-psc-buttons\"><a href=\"\/pyq\/pyq-upsc-cisf-ac-exe-2018.pdf\" target=\"_blank\" class=\"psc-pdf-button\" rel=\"noopener\">Download PDF<\/a><a href=\"\/pyq-upsc-cisf-ac-exe-2018\" target=\"_blank\" class=\"psc-attempt-button\" rel=\"noopener\">Attempt Online<\/a><\/div>\n<\/div>\n<section id=\"pyq-correct-answer\">A body is under equilibrium if the net force acting on it is zero (translational equilibrium) and the net torque acting on it is zero (rotational equilibrium).<br \/>\nStatement 1: &#8220;No forces are acting&#8221; is incorrect. Forces can be acting, but they must be balanced, meaning the vector sum of all forces is zero.<br \/>\nStatement 2: &#8220;A number of parallel forces may be acting&#8221; is correct. For example, if two equal and opposite parallel forces act on a body, they form a couple, which produces a torque. For the body to be in equilibrium, this torque must be balanced by other torques, and the net force must be zero (which these two forces satisfy). More generally, parallel forces can sum to zero net force and zero net torque.<br \/>\nStatement 3: &#8220;The law of moments must apply&#8221; is correct. The Law of Moments states that for rotational equilibrium, the sum of clockwise moments about any point equals the sum of anticlockwise moments about the same point. This is a necessary condition for a body to be in equilibrium.<\/section>\n<section id=\"pyq-key-points\">Equilibrium requires zero net force and zero net torque. The Law of Moments describes the condition for zero net torque.<\/section>\n<section id=\"pyq-additional-information\">A body in equilibrium can be either at rest (static equilibrium) or moving with constant velocity (dynamic equilibrium). Both require the net force and net torque to be zero.<\/section>\n","protected":false},"excerpt":{"rendered":"<p>Which of the following statements about a body under equilibrium is\/are correct ? 1. No forces are acting. 2. A number of parallel forces may be acting. 3. The law of moments must apply. Select the correct answer using the code given below : [amp_mcq option1=&#8221;1, 2 and 3&#8243; option2=&#8221;2 and 3 only&#8221; option3=&#8221;1 and &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"Which of the following statements about a body under equilibrium is\/ar\" class=\"read-more button\" href=\"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-about-a-body-under-equilibrium-is-ar\/#more-92503\">Detailed Solution<span class=\"screen-reader-text\">Which of the following statements about a body under equilibrium is\/ar<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1089],"tags":[1114,1129,1128],"class_list":["post-92503","post","type-post","status-publish","format-standard","hentry","category-upsc-cisf-ac-exe","tag-1114","tag-mechanics","tag-physics","no-featured-image-padding"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.2 (Yoast SEO v23.3) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Which of the following statements about a body under equilibrium is\/ar<\/title>\n<meta name=\"description\" content=\"A body is under equilibrium if the net force acting on it is zero (translational equilibrium) and the net torque acting on it is zero (rotational equilibrium). Statement 1: &quot;No forces are acting&quot; is incorrect. Forces can be acting, but they must be balanced, meaning the vector sum of all forces is zero. Statement 2: &quot;A number of parallel forces may be acting&quot; is correct. For example, if two equal and opposite parallel forces act on a body, they form a couple, which produces a torque. For the body to be in equilibrium, this torque must be balanced by other torques, and the net force must be zero (which these two forces satisfy). More generally, parallel forces can sum to zero net force and zero net torque. Statement 3: &quot;The law of moments must apply&quot; is correct. The Law of Moments states that for rotational equilibrium, the sum of clockwise moments about any point equals the sum of anticlockwise moments about the same point. This is a necessary condition for a body to be in equilibrium. Equilibrium requires zero net force and zero net torque. The Law of Moments describes the condition for zero net torque.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-about-a-body-under-equilibrium-is-ar\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Which of the following statements about a body under equilibrium is\/ar\" \/>\n<meta property=\"og:description\" content=\"A body is under equilibrium if the net force acting on it is zero (translational equilibrium) and the net torque acting on it is zero (rotational equilibrium). Statement 1: &quot;No forces are acting&quot; is incorrect. Forces can be acting, but they must be balanced, meaning the vector sum of all forces is zero. Statement 2: &quot;A number of parallel forces may be acting&quot; is correct. For example, if two equal and opposite parallel forces act on a body, they form a couple, which produces a torque. For the body to be in equilibrium, this torque must be balanced by other torques, and the net force must be zero (which these two forces satisfy). More generally, parallel forces can sum to zero net force and zero net torque. Statement 3: &quot;The law of moments must apply&quot; is correct. The Law of Moments states that for rotational equilibrium, the sum of clockwise moments about any point equals the sum of anticlockwise moments about the same point. This is a necessary condition for a body to be in equilibrium. Equilibrium requires zero net force and zero net torque. The Law of Moments describes the condition for zero net torque.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-about-a-body-under-equilibrium-is-ar\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T11:26:01+00:00\" \/>\n<meta name=\"author\" content=\"rawan239\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"rawan239\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Which of the following statements about a body under equilibrium is\/ar","description":"A body is under equilibrium if the net force acting on it is zero (translational equilibrium) and the net torque acting on it is zero (rotational equilibrium). Statement 1: \"No forces are acting\" is incorrect. Forces can be acting, but they must be balanced, meaning the vector sum of all forces is zero. Statement 2: \"A number of parallel forces may be acting\" is correct. For example, if two equal and opposite parallel forces act on a body, they form a couple, which produces a torque. For the body to be in equilibrium, this torque must be balanced by other torques, and the net force must be zero (which these two forces satisfy). More generally, parallel forces can sum to zero net force and zero net torque. Statement 3: \"The law of moments must apply\" is correct. The Law of Moments states that for rotational equilibrium, the sum of clockwise moments about any point equals the sum of anticlockwise moments about the same point. This is a necessary condition for a body to be in equilibrium. Equilibrium requires zero net force and zero net torque. The Law of Moments describes the condition for zero net torque.","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:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-about-a-body-under-equilibrium-is-ar\/","og_locale":"en_US","og_type":"article","og_title":"Which of the following statements about a body under equilibrium is\/ar","og_description":"A body is under equilibrium if the net force acting on it is zero (translational equilibrium) and the net torque acting on it is zero (rotational equilibrium). Statement 1: \"No forces are acting\" is incorrect. Forces can be acting, but they must be balanced, meaning the vector sum of all forces is zero. Statement 2: \"A number of parallel forces may be acting\" is correct. For example, if two equal and opposite parallel forces act on a body, they form a couple, which produces a torque. For the body to be in equilibrium, this torque must be balanced by other torques, and the net force must be zero (which these two forces satisfy). More generally, parallel forces can sum to zero net force and zero net torque. Statement 3: \"The law of moments must apply\" is correct. The Law of Moments states that for rotational equilibrium, the sum of clockwise moments about any point equals the sum of anticlockwise moments about the same point. This is a necessary condition for a body to be in equilibrium. Equilibrium requires zero net force and zero net torque. The Law of Moments describes the condition for zero net torque.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-about-a-body-under-equilibrium-is-ar\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T11:26:01+00:00","author":"rawan239","twitter_card":"summary_large_image","twitter_misc":{"Written by":"rawan239","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-about-a-body-under-equilibrium-is-ar\/","url":"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-about-a-body-under-equilibrium-is-ar\/","name":"Which of the following statements about a body under equilibrium is\/ar","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T11:26:01+00:00","dateModified":"2025-06-01T11:26:01+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"A body is under equilibrium if the net force acting on it is zero (translational equilibrium) and the net torque acting on it is zero (rotational equilibrium). Statement 1: \"No forces are acting\" is incorrect. Forces can be acting, but they must be balanced, meaning the vector sum of all forces is zero. Statement 2: \"A number of parallel forces may be acting\" is correct. For example, if two equal and opposite parallel forces act on a body, they form a couple, which produces a torque. For the body to be in equilibrium, this torque must be balanced by other torques, and the net force must be zero (which these two forces satisfy). More generally, parallel forces can sum to zero net force and zero net torque. Statement 3: \"The law of moments must apply\" is correct. The Law of Moments states that for rotational equilibrium, the sum of clockwise moments about any point equals the sum of anticlockwise moments about the same point. This is a necessary condition for a body to be in equilibrium. Equilibrium requires zero net force and zero net torque. The Law of Moments describes the condition for zero net torque.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-about-a-body-under-equilibrium-is-ar\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-about-a-body-under-equilibrium-is-ar\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-about-a-body-under-equilibrium-is-ar\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/exam.pscnotes.com\/mcq\/"},{"@type":"ListItem","position":2,"name":"UPSC CISF-AC-EXE","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/upsc-cisf-ac-exe\/"},{"@type":"ListItem","position":3,"name":"Which of the following statements about a body under equilibrium is\/ar"}]},{"@type":"WebSite","@id":"https:\/\/exam.pscnotes.com\/mcq\/#website","url":"https:\/\/exam.pscnotes.com\/mcq\/","name":"MCQ and Quiz for Exams","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/exam.pscnotes.com\/mcq\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209","name":"rawan239","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/761a7274f9cce048fa5b921221e7934820d74514df93ef195a9d22af0c1c9001?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/761a7274f9cce048fa5b921221e7934820d74514df93ef195a9d22af0c1c9001?s=96&d=mm&r=g","caption":"rawan239"},"sameAs":["https:\/\/exam.pscnotes.com"],"url":"https:\/\/exam.pscnotes.com\/mcq\/author\/rawan239\/"}]}},"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/92503","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/comments?post=92503"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/92503\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=92503"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=92503"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=92503"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}