Homework EquationsN/A The Attempt at a SolutionN/A

AI Thread Summary
The discussion centers on a biomechanics student's difficulty in solving a problem involving angular velocity and radius of gyration. The student is tasked with determining the diver's angular velocity when changing positions, given an initial angular velocity and radius of gyration. Key insights include the importance of conservation of angular momentum, which states that the product of angular velocity and moment of inertia remains constant when no external torques act on the system. The student is encouraged to focus on how the change in radius of gyration affects angular velocity without needing a change in time. Understanding these concepts will help in solving the problem effectively.
jayty22
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angular velocity?!

Homework Statement


Hello, I am a 1st yr biomechanics student and I am having a lot of problems figuring this stuff out and I have an exam coming up and I'm kinda panicing! lol! ok here is the exact problem:

"A 60kg diver is positioned so that his radius of gyration is 0.5m as he leaves the board with an angular velocity of 14rad/sec. What is the diver's angular velocity when he assumes a 'tuck' position, altering his radius of gyration to 0.3m?"

My conundrum comes because the formulas we were given all include a 'change in time' to be used in the equation. Maybe (yes, definately!) I am missing something here so can someone please educate me as to how I would go about solving this problem and the formula that I am supposed to use.

Thanks very much in advance,

- One confused young man (a.k.a. Jay) :confused:
 
Physics news on Phys.org
Giving you the radius of gyration and the mass is a way of giving you the moments of inertia (and I had to look that up). Think about conservation of angular momentum.
 

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