{"id":90003,"date":"2025-06-01T10:18:55","date_gmt":"2025-06-01T10:18:55","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=90003"},"modified":"2025-06-01T10:18:55","modified_gmt":"2025-06-01T10:18:55","slug":"which-one-of-the-following-statements-is-not-true-3","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-not-true-3\/","title":{"rendered":"Which one of the following statements is not true ?"},"content":{"rendered":"

Which one of the following statements is not true ?<\/p>\n

[amp_mcq option1=”The gravitational force of earth acting on a body of mass 1 kg is 9.8 newton” option2=”The force acting on an object of mass 5 kg moving with a uniform velocity of 10 m\/s on a frictionless surface is zero” option3=”The SI unit of weight is kg” option4=”The momentum of a man having mass 100 kg walking with a uniform velocity of 2 m\/s is 200 newton second” correct=”option3″]<\/p>\n

\n
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This question was previously asked in<\/div>\n
UPSC CAPF – 2016<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nStatement C is incorrect. Weight is the force exerted on a mass by gravity. The SI unit of force is the Newton (N). Kilogram (kg) is the SI unit of mass, which is a measure of the amount of matter in an object and is independent of gravity. Weight is measured in Newtons.
\n<\/section>\n
\nDistinguishing between mass and weight and knowing their respective SI units is a fundamental concept in physics.
\n<\/section>\n
\nStatement A is correct: The weight of a 1 kg mass on Earth, where the standard acceleration due to gravity (g) is approximately 9.8 m\/s\u00b2, is given by W = mg = 1 kg * 9.8 m\/s\u00b2 = 9.8 N.
\nStatement B is correct: If an object moves with uniform velocity, its acceleration is zero (a=0). According to Newton’s second law, the net force acting on the object is F = ma. If a=0, then F=0. On a frictionless surface, there are no opposing forces like friction.
\nStatement D is correct: Momentum (p) is calculated as mass (m) times velocity (v). p = 100 kg * 2 m\/s = 200 kg\u22c5m\/s. The unit kg\u22c5m\/s is equivalent to Newton-second (N\u22c5s), as 1 N = 1 kg\u22c5m\/s\u00b2. So, the momentum is 200 N\u22c5s.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Which one of the following statements is not true ? [amp_mcq option1=”The gravitational force of earth acting on a body of mass 1 kg is 9.8 newton” option2=”The force acting on an object of mass 5 kg moving with a uniform velocity of 10 m\/s on a frictionless surface is zero” option3=”The SI unit of … <\/p>\n

Detailed SolutionWhich one of the following statements is not true ?<\/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":[1085],"tags":[1098,1129,1128],"class_list":["post-90003","post","type-post","status-publish","format-standard","hentry","category-upsc-capf","tag-1098","tag-mechanics","tag-physics","no-featured-image-padding"],"yoast_head":"\nWhich one of the following statements is not true ?<\/title>\n<meta name=\"description\" content=\"Statement C is incorrect. Weight is the force exerted on a mass by gravity. The SI unit of force is the Newton (N). Kilogram (kg) is the SI unit of mass, which is a measure of the amount of matter in an object and is independent of gravity. Weight is measured in Newtons. Distinguishing between mass and weight and knowing their respective SI units is a fundamental concept in physics.\" \/>\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-one-of-the-following-statements-is-not-true-3\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Which one of the following statements is not true ?\" \/>\n<meta property=\"og:description\" content=\"Statement C is incorrect. Weight is the force exerted on a mass by gravity. The SI unit of force is the Newton (N). Kilogram (kg) is the SI unit of mass, which is a measure of the amount of matter in an object and is independent of gravity. Weight is measured in Newtons. 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