{"id":87896,"date":"2025-06-01T06:56:32","date_gmt":"2025-06-01T06:56:32","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=87896"},"modified":"2025-06-01T06:56:32","modified_gmt":"2025-06-01T06:56:32","slug":"inhabitants-are-unaware-of-the-speed-of-rotation-of-the-planet-earth-b","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/inhabitants-are-unaware-of-the-speed-of-rotation-of-the-planet-earth-b\/","title":{"rendered":"Inhabitants are unaware of the speed of rotation of the planet Earth b"},"content":{"rendered":"<p>Inhabitants are unaware of the speed of rotation of the planet Earth because<\/p>\n<ul>\n<li>the angular velocity is constant for each place on the Earth&#8217;s surface<\/li>\n<li>the atmosphere rotates with the Earth<\/li>\n<li>there are no nearby objects, either stationary or moving at a rate different from that of the Earth<\/li>\n<\/ul>\n<p>Which of the above is\/are the correct explanation(s)?<\/p>\n<p>[amp_mcq option1=&#8221;1 only&#8221; option2=&#8221;1 and 2 only&#8221; option3=&#8221;2 and 3 only&#8221; option4=&#8221;1, 2 and 3&#8243; correct=&#8221;option4&#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 NDA-1 &#8211; 2022<\/div>\n<\/div>\n<div class=\"pyq-exam-psc-buttons\"><a href=\"\/pyq\/pyq-upsc-nda-1-2022.pdf\" target=\"_blank\" class=\"psc-pdf-button\" rel=\"noopener\">Download PDF<\/a><a href=\"\/pyq-upsc-nda-1-2022\" target=\"_blank\" class=\"psc-attempt-button\" rel=\"noopener\">Attempt Online<\/a><\/div>\n<\/div>\n<section id=\"pyq-correct-answer\">\nAll three statements provide valid reasons why inhabitants are unaware of the Earth&#8217;s rotation speed.<br \/>\n<\/section>\n<section id=\"pyq-key-points\">\nOur perception of motion is relative. Since everything around us (atmosphere, land, buildings) is rotating with us at the same speed, and the rotation is constant, we don&#8217;t feel the motion or observe significant relative movement.<br \/>\n<\/section>\n<section id=\"pyq-additional-information\">\nStatement 1: The constant angular velocity means there is no significant acceleration (except constant centripetal acceleration, which is small and contributes subtly to gravity variations but not the feeling of rotation speed) that we would feel as a change in motion. Our senses primarily detect changes in velocity (acceleration).<br \/>\nStatement 2: The atmosphere rotating with the Earth means there is no strong wind resistance or relative air movement caused by our speed, which would otherwise make the motion noticeable.<br \/>\nStatement 3: Without nearby stationary objects or objects moving at a different speed, we lack a visual reference frame to perceive our rapid motion. Distant celestial objects are too far away to provide this sense of rapid nearby movement.<br \/>\n<\/section>\n","protected":false},"excerpt":{"rendered":"<p>Inhabitants are unaware of the speed of rotation of the planet Earth because the angular velocity is constant for each place on the Earth&#8217;s surface the atmosphere rotates with the Earth there are no nearby objects, either stationary or moving at a rate different from that of the Earth Which of the above is\/are the &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"Inhabitants are unaware of the speed of rotation of the planet Earth b\" class=\"read-more button\" href=\"https:\/\/exam.pscnotes.com\/mcq\/inhabitants-are-unaware-of-the-speed-of-rotation-of-the-planet-earth-b\/#more-87896\">Detailed Solution<span class=\"screen-reader-text\">Inhabitants are unaware of the speed of rotation of the planet Earth b<\/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":[1093],"tags":[1108,1129,1128],"class_list":["post-87896","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-1","tag-1108","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>Inhabitants are unaware of the speed of rotation of the planet Earth b<\/title>\n<meta name=\"description\" content=\"All three statements provide valid reasons why inhabitants are unaware of the Earth&#039;s rotation speed. Our perception of motion is relative. Since everything around us (atmosphere, land, buildings) is rotating with us at the same speed, and the rotation is constant, we don&#039;t feel the motion or observe significant relative movement.\" \/>\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\/inhabitants-are-unaware-of-the-speed-of-rotation-of-the-planet-earth-b\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Inhabitants are unaware of the speed of rotation of the planet Earth b\" \/>\n<meta property=\"og:description\" content=\"All three statements provide valid reasons why inhabitants are unaware of the Earth&#039;s rotation speed. Our perception of motion is relative. Since everything around us (atmosphere, land, buildings) is rotating with us at the same speed, and the rotation is constant, we don&#039;t feel the motion or observe significant relative movement.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/inhabitants-are-unaware-of-the-speed-of-rotation-of-the-planet-earth-b\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T06:56:32+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":"Inhabitants are unaware of the speed of rotation of the planet Earth b","description":"All three statements provide valid reasons why inhabitants are unaware of the Earth's rotation speed. Our perception of motion is relative. Since everything around us (atmosphere, land, buildings) is rotating with us at the same speed, and the rotation is constant, we don't feel the motion or observe significant relative movement.","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\/inhabitants-are-unaware-of-the-speed-of-rotation-of-the-planet-earth-b\/","og_locale":"en_US","og_type":"article","og_title":"Inhabitants are unaware of the speed of rotation of the planet Earth b","og_description":"All three statements provide valid reasons why inhabitants are unaware of the Earth's rotation speed. Our perception of motion is relative. Since everything around us (atmosphere, land, buildings) is rotating with us at the same speed, and the rotation is constant, we don't feel the motion or observe significant relative movement.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/inhabitants-are-unaware-of-the-speed-of-rotation-of-the-planet-earth-b\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T06:56:32+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\/inhabitants-are-unaware-of-the-speed-of-rotation-of-the-planet-earth-b\/","url":"https:\/\/exam.pscnotes.com\/mcq\/inhabitants-are-unaware-of-the-speed-of-rotation-of-the-planet-earth-b\/","name":"Inhabitants are unaware of the speed of rotation of the planet Earth b","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T06:56:32+00:00","dateModified":"2025-06-01T06:56:32+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"All three statements provide valid reasons why inhabitants are unaware of the Earth's rotation speed. Our perception of motion is relative. 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