{"id":6692,"date":"2024-04-15T02:32:42","date_gmt":"2024-04-15T02:32:42","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=6692"},"modified":"2024-04-15T02:32:42","modified_gmt":"2024-04-15T02:32:42","slug":"on-a-ladder-resting-on-a-rough-ground-and-leaning-against-a-smooth-vertical-wall-the-force-of-friction-acts-a-downwards-at-its-upper-end-b-upwards-at-its-upper-end-c-perpendicular-to-the-wall-at-i","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/on-a-ladder-resting-on-a-rough-ground-and-leaning-against-a-smooth-vertical-wall-the-force-of-friction-acts-a-downwards-at-its-upper-end-b-upwards-at-its-upper-end-c-perpendicular-to-the-wall-at-i\/","title":{"rendered":"On a ladder resting on a rough ground and leaning against a smooth vertical wall, the force of friction acts A. Downwards at its upper end B. Upwards at its upper end C. Perpendicular to the wall at its upper end D. Zero at its upper end"},"content":{"rendered":"<p>[amp_mcq option1=&#8221;Downwards at its upper end&#8221; option2=&#8221;Upwards at its upper end&#8221; option3=&#8221;Perpendicular to the wall at its upper end&#8221; option4=&#8221;Zero at its upper end&#8221; correct=&#8221;option3&#8243;]<!--more--><\/p>\n<p>The correct answer is: C. Perpendicular to the wall at its upper end.<\/p>\n<p>The force of friction always acts in the direction opposite to the relative motion of the two surfaces in contact. In this case, the ladder is not moving relative to the wall, so the force of friction between the ladder and the wall acts perpendicular to the wall.<\/p>\n<p>Option A is incorrect because the force of friction would not act downwards at the upper end of the ladder. If the force of friction acted downwards, it would cause the ladder to slide down the wall.<\/p>\n<p>Option B is incorrect because the force of friction would not act upwards at the upper end of the ladder. If the force of friction acted upwards, it would cause the ladder to lift off the wall.<\/p>\n<p>Option D is incorrect because the force of friction would not be zero at the upper end of the ladder. If the force of friction were zero, the ladder would be able to slide down the wall.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>[amp_mcq option1=&#8221;Downwards at its upper end&#8221; option2=&#8221;Upwards at its upper end&#8221; option3=&#8221;Perpendicular to the wall at its upper end&#8221; option4=&#8221;Zero at its upper end&#8221; correct=&#8221;option3&#8243;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[645],"tags":[],"class_list":["post-6692","post","type-post","status-publish","format-standard","hentry","category-applied-mechanics-and-graphic-statics","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>On a ladder resting on a rough ground and leaning against a smooth vertical wall, the force of friction acts A. Downwards at its upper end B. Upwards at its upper end C. Perpendicular to the wall at its upper end D. Zero at its upper end<\/title>\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\/on-a-ladder-resting-on-a-rough-ground-and-leaning-against-a-smooth-vertical-wall-the-force-of-friction-acts-a-downwards-at-its-upper-end-b-upwards-at-its-upper-end-c-perpendicular-to-the-wall-at-i\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"On a ladder resting on a rough ground and leaning against a smooth vertical wall, the force of friction acts A. Downwards at its upper end B. Upwards at its upper end C. Perpendicular to the wall at its upper end D. Zero at its upper end\" \/>\n<meta property=\"og:description\" content=\"[amp_mcq option1=&#8221;Downwards at its upper end&#8221; option2=&#8221;Upwards at its upper end&#8221; option3=&#8221;Perpendicular to the wall at its upper end&#8221; option4=&#8221;Zero at its upper end&#8221; correct=&#8221;option3&#8243;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/on-a-ladder-resting-on-a-rough-ground-and-leaning-against-a-smooth-vertical-wall-the-force-of-friction-acts-a-downwards-at-its-upper-end-b-upwards-at-its-upper-end-c-perpendicular-to-the-wall-at-i\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2024-04-15T02:32:42+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":"On a ladder resting on a rough ground and leaning against a smooth vertical wall, the force of friction acts A. Downwards at its upper end B. Upwards at its upper end C. Perpendicular to the wall at its upper end D. Zero at its upper end","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\/on-a-ladder-resting-on-a-rough-ground-and-leaning-against-a-smooth-vertical-wall-the-force-of-friction-acts-a-downwards-at-its-upper-end-b-upwards-at-its-upper-end-c-perpendicular-to-the-wall-at-i\/","og_locale":"en_US","og_type":"article","og_title":"On a ladder resting on a rough ground and leaning against a smooth vertical wall, the force of friction acts A. Downwards at its upper end B. Upwards at its upper end C. Perpendicular to the wall at its upper end D. Zero at its upper end","og_description":"[amp_mcq option1=&#8221;Downwards at its upper end&#8221; option2=&#8221;Upwards at its upper end&#8221; option3=&#8221;Perpendicular to the wall at its upper end&#8221; option4=&#8221;Zero at its upper end&#8221; correct=&#8221;option3&#8243;]","og_url":"https:\/\/exam.pscnotes.com\/mcq\/on-a-ladder-resting-on-a-rough-ground-and-leaning-against-a-smooth-vertical-wall-the-force-of-friction-acts-a-downwards-at-its-upper-end-b-upwards-at-its-upper-end-c-perpendicular-to-the-wall-at-i\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2024-04-15T02:32:42+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\/on-a-ladder-resting-on-a-rough-ground-and-leaning-against-a-smooth-vertical-wall-the-force-of-friction-acts-a-downwards-at-its-upper-end-b-upwards-at-its-upper-end-c-perpendicular-to-the-wall-at-i\/","url":"https:\/\/exam.pscnotes.com\/mcq\/on-a-ladder-resting-on-a-rough-ground-and-leaning-against-a-smooth-vertical-wall-the-force-of-friction-acts-a-downwards-at-its-upper-end-b-upwards-at-its-upper-end-c-perpendicular-to-the-wall-at-i\/","name":"On a ladder resting on a rough ground and leaning against a smooth vertical wall, the force of friction acts A. Downwards at its upper end B. Upwards at its upper end C. Perpendicular to the wall at its upper end D. Zero at its upper end","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2024-04-15T02:32:42+00:00","dateModified":"2024-04-15T02:32:42+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/on-a-ladder-resting-on-a-rough-ground-and-leaning-against-a-smooth-vertical-wall-the-force-of-friction-acts-a-downwards-at-its-upper-end-b-upwards-at-its-upper-end-c-perpendicular-to-the-wall-at-i\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/on-a-ladder-resting-on-a-rough-ground-and-leaning-against-a-smooth-vertical-wall-the-force-of-friction-acts-a-downwards-at-its-upper-end-b-upwards-at-its-upper-end-c-perpendicular-to-the-wall-at-i\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/on-a-ladder-resting-on-a-rough-ground-and-leaning-against-a-smooth-vertical-wall-the-force-of-friction-acts-a-downwards-at-its-upper-end-b-upwards-at-its-upper-end-c-perpendicular-to-the-wall-at-i\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/exam.pscnotes.com\/mcq\/"},{"@type":"ListItem","position":2,"name":"mcq","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/mcq\/"},{"@type":"ListItem","position":3,"name":"Civil engineering","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/mcq\/civil-engineering\/"},{"@type":"ListItem","position":4,"name":"Applied mechanics and graphic statics","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/mcq\/civil-engineering\/applied-mechanics-and-graphic-statics\/"},{"@type":"ListItem","position":5,"name":"On a ladder resting on a rough ground and leaning against a smooth vertical wall, the force of friction acts A. Downwards at its upper end B. Upwards at its upper end C. Perpendicular to the wall at its upper end D. Zero at its upper end"}]},{"@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\/6692","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=6692"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/6692\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=6692"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=6692"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=6692"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}