Question
Download Solution PDFA man standing on a revolving platform spreading his hands outward. Then:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFCONCEPT:
Angular momentum (L):
- The angular momentum of a rigid body is defined as the product of the moment of inertia and the angular velocity i.e.,
\(⇒ L = Iω \)
Where I = moment of inertia and ω = angular velocity
Law of conservation of angular momentum:
- When the net external torque acting on a body about a given axis is zero, the total angular momentum of the body about that axis remains constant i.e.,
⇒ I1ω1 = I2ω2
EXPLANATION:
- When a man standing on a revolving platform and spreading his hands suddenly as he stretches his hand that he is increasing his moment of inertia thereby decreasing his angular velocity using the principle of conservation of angular momentum. Therefore option 2 is correct.
Last updated on May 19, 2025
->The Indian Coast Guard Navik GD Merit List is out on the official website.
-> The Indian Coast Guard Navik GD is a prestigious exam for those who want to serve the country in Defence Services.
-> A total of 260 vacancies have been released through the Coast Guard Enrolled Personnel Test (CGEPT) for the 02/2025 batch.
-> Candidates had applied online till 3rd March 2025.
-> Candidates who have completed their 10+2 with Maths and Physics are eligible for this post.
-> Candidates must go through the Indian Coast Guard Navik GD previous year papers.