{"id":86164,"date":"2025-06-01T03:39:15","date_gmt":"2025-06-01T03:39:15","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=86164"},"modified":"2025-06-01T03:39:15","modified_gmt":"2025-06-01T03:39:15","slug":"an-athlete-completes-one-round-of-a-circular-track-of-diameter-100-m-i","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/an-athlete-completes-one-round-of-a-circular-track-of-diameter-100-m-i\/","title":{"rendered":"An athlete completes one round of a circular track of diameter 100 m i"},"content":{"rendered":"

An athlete completes one round of a circular track of diameter 100 m in 20 s. What will be the displacements after 1 minute and 10 s, respectively ?<\/p>\n

[amp_mcq option1=”0 m, 50 m” option2=”300 m, 100 m” option3=”300 m, 50 m” option4=”0 m, 100 m” correct=”option4″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC CDS-2 – 2021<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe athlete completes one round of a circular track (diameter 100 m, radius 50 m) in 20 seconds.
\nAfter 1 minute (60 seconds), the athlete has completed 60 s \/ 20 s\/round = 3 full rounds. In circular motion, after completing a full circle or multiple full circles, the displacement is zero because the final position is the same as the starting position. So, displacement after 1 minute is 0 m.
\nAfter 1 minute and 10 seconds (70 seconds), the athlete has completed 70 s \/ 20 s\/round = 3.5 rounds. This is 3 full rounds plus half a round. After 3 full rounds, the displacement is zero. The remaining half-round takes the athlete from the starting point to the diametrically opposite point on the track. The displacement in this case is the straight-line distance between the starting point and the diametrically opposite point, which is equal to the diameter of the circle. The diameter is given as 100 m. So, displacement after 1 minute and 10 seconds is 100 m.
\n<\/section>\n
\n– Displacement is the shortest distance between the initial and final positions.
\n– For motion along a closed loop (like a full circle), the displacement is zero if the motion starts and ends at the same point.
\n– For motion along half a circle, the displacement is equal to the diameter.
\n<\/section>\n
\nDistance covered is the total path length traced. In this case, distance after 60s would be 3 * circumference, and distance after 70s would be 3.5 * circumference. Displacement is a vector quantity and depends only on the initial and final positions.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

An athlete completes one round of a circular track of diameter 100 m in 20 s. What will be the displacements after 1 minute and 10 s, respectively ? [amp_mcq option1=”0 m, 50 m” option2=”300 m, 100 m” option3=”300 m, 50 m” option4=”0 m, 100 m” correct=”option4″] This question was previously asked in UPSC CDS-2 … <\/p>\n

Detailed SolutionAn athlete completes one round of a circular track of diameter 100 m i<\/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":[1088],"tags":[1110,1129,1128],"class_list":["post-86164","post","type-post","status-publish","format-standard","hentry","category-upsc-cds-2","tag-1110","tag-mechanics","tag-physics","no-featured-image-padding"],"yoast_head":"\nAn athlete completes one round of a circular track of diameter 100 m i<\/title>\n<meta name=\"description\" content=\"The athlete completes one round of a circular track (diameter 100 m, radius 50 m) in 20 seconds. After 1 minute (60 seconds), the athlete has completed 60 s \/ 20 s\/round = 3 full rounds. In circular motion, after completing a full circle or multiple full circles, the displacement is zero because the final position is the same as the starting position. So, displacement after 1 minute is 0 m. After 1 minute and 10 seconds (70 seconds), the athlete has completed 70 s \/ 20 s\/round = 3.5 rounds. This is 3 full rounds plus half a round. After 3 full rounds, the displacement is zero. The remaining half-round takes the athlete from the starting point to the diametrically opposite point on the track. The displacement in this case is the straight-line distance between the starting point and the diametrically opposite point, which is equal to the diameter of the circle. The diameter is given as 100 m. So, displacement after 1 minute and 10 seconds is 100 m. - Displacement is the shortest distance between the initial and final positions. - For motion along a closed loop (like a full circle), the displacement is zero if the motion starts and ends at the same point. - For motion along half a circle, the displacement is equal to the diameter.\" \/>\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\/an-athlete-completes-one-round-of-a-circular-track-of-diameter-100-m-i\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"An athlete completes one round of a circular track of diameter 100 m i\" \/>\n<meta property=\"og:description\" content=\"The athlete completes one round of a circular track (diameter 100 m, radius 50 m) in 20 seconds. After 1 minute (60 seconds), the athlete has completed 60 s \/ 20 s\/round = 3 full rounds. In circular motion, after completing a full circle or multiple full circles, the displacement is zero because the final position is the same as the starting position. So, displacement after 1 minute is 0 m. After 1 minute and 10 seconds (70 seconds), the athlete has completed 70 s \/ 20 s\/round = 3.5 rounds. This is 3 full rounds plus half a round. After 3 full rounds, the displacement is zero. The remaining half-round takes the athlete from the starting point to the diametrically opposite point on the track. The displacement in this case is the straight-line distance between the starting point and the diametrically opposite point, which is equal to the diameter of the circle. The diameter is given as 100 m. So, displacement after 1 minute and 10 seconds is 100 m. - Displacement is the shortest distance between the initial and final positions. - For motion along a closed loop (like a full circle), the displacement is zero if the motion starts and ends at the same point. - For motion along half a circle, the displacement is equal to the diameter.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/an-athlete-completes-one-round-of-a-circular-track-of-diameter-100-m-i\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T03:39:15+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":"An athlete completes one round of a circular track of diameter 100 m i","description":"The athlete completes one round of a circular track (diameter 100 m, radius 50 m) in 20 seconds. After 1 minute (60 seconds), the athlete has completed 60 s \/ 20 s\/round = 3 full rounds. In circular motion, after completing a full circle or multiple full circles, the displacement is zero because the final position is the same as the starting position. So, displacement after 1 minute is 0 m. After 1 minute and 10 seconds (70 seconds), the athlete has completed 70 s \/ 20 s\/round = 3.5 rounds. This is 3 full rounds plus half a round. After 3 full rounds, the displacement is zero. The remaining half-round takes the athlete from the starting point to the diametrically opposite point on the track. The displacement in this case is the straight-line distance between the starting point and the diametrically opposite point, which is equal to the diameter of the circle. The diameter is given as 100 m. So, displacement after 1 minute and 10 seconds is 100 m. - Displacement is the shortest distance between the initial and final positions. - For motion along a closed loop (like a full circle), the displacement is zero if the motion starts and ends at the same point. - For motion along half a circle, the displacement is equal to the diameter.","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\/an-athlete-completes-one-round-of-a-circular-track-of-diameter-100-m-i\/","og_locale":"en_US","og_type":"article","og_title":"An athlete completes one round of a circular track of diameter 100 m i","og_description":"The athlete completes one round of a circular track (diameter 100 m, radius 50 m) in 20 seconds. After 1 minute (60 seconds), the athlete has completed 60 s \/ 20 s\/round = 3 full rounds. In circular motion, after completing a full circle or multiple full circles, the displacement is zero because the final position is the same as the starting position. So, displacement after 1 minute is 0 m. After 1 minute and 10 seconds (70 seconds), the athlete has completed 70 s \/ 20 s\/round = 3.5 rounds. This is 3 full rounds plus half a round. After 3 full rounds, the displacement is zero. The remaining half-round takes the athlete from the starting point to the diametrically opposite point on the track. The displacement in this case is the straight-line distance between the starting point and the diametrically opposite point, which is equal to the diameter of the circle. The diameter is given as 100 m. So, displacement after 1 minute and 10 seconds is 100 m. - Displacement is the shortest distance between the initial and final positions. - For motion along a closed loop (like a full circle), the displacement is zero if the motion starts and ends at the same point. - For motion along half a circle, the displacement is equal to the diameter.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/an-athlete-completes-one-round-of-a-circular-track-of-diameter-100-m-i\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T03:39:15+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\/an-athlete-completes-one-round-of-a-circular-track-of-diameter-100-m-i\/","url":"https:\/\/exam.pscnotes.com\/mcq\/an-athlete-completes-one-round-of-a-circular-track-of-diameter-100-m-i\/","name":"An athlete completes one round of a circular track of diameter 100 m i","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T03:39:15+00:00","dateModified":"2025-06-01T03:39:15+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"The athlete completes one round of a circular track (diameter 100 m, radius 50 m) in 20 seconds. After 1 minute (60 seconds), the athlete has completed 60 s \/ 20 s\/round = 3 full rounds. In circular motion, after completing a full circle or multiple full circles, the displacement is zero because the final position is the same as the starting position. So, displacement after 1 minute is 0 m. After 1 minute and 10 seconds (70 seconds), the athlete has completed 70 s \/ 20 s\/round = 3.5 rounds. This is 3 full rounds plus half a round. After 3 full rounds, the displacement is zero. The remaining half-round takes the athlete from the starting point to the diametrically opposite point on the track. The displacement in this case is the straight-line distance between the starting point and the diametrically opposite point, which is equal to the diameter of the circle. The diameter is given as 100 m. So, displacement after 1 minute and 10 seconds is 100 m. - Displacement is the shortest distance between the initial and final positions. - For motion along a closed loop (like a full circle), the displacement is zero if the motion starts and ends at the same point. - For motion along half a circle, the displacement is equal to the diameter.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/an-athlete-completes-one-round-of-a-circular-track-of-diameter-100-m-i\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/an-athlete-completes-one-round-of-a-circular-track-of-diameter-100-m-i\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/an-athlete-completes-one-round-of-a-circular-track-of-diameter-100-m-i\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/exam.pscnotes.com\/mcq\/"},{"@type":"ListItem","position":2,"name":"UPSC CDS-2","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/upsc-cds-2\/"},{"@type":"ListItem","position":3,"name":"An athlete completes one round of a circular track of diameter 100 m i"}]},{"@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\/86164","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=86164"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/86164\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=86164"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=86164"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=86164"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}