8.3. A diver has a mass of 70 kg. In 'tuck' position, we can treat this mass as a disc of radius 0.50 m, but when fully extended, the diver is more like a rod of length 2.4 m. (a) Compare the rotational inertia of this diver in tuck position to their rotational inertia when fully extended. (b) If this diver ends their dive fully extended and is rotating at 0.85 rotations/s, what was their rotational speed earlier in the dive when they were in tuck position? (c) Does the transition from tuck to fully extended require extra energy to be provided by the diver's muscles?
8.3. A diver has a mass of 70 kg. In 'tuck' position, we can treat this mass as a disc of radius 0.50 m, but when fully extended, the diver is more like a rod of length 2.4 m. (a) Compare the rotational inertia of this diver in tuck position to their rotational inertia when fully extended. (b) If this diver ends their dive fully extended and is rotating at 0.85 rotations/s, what was their rotational speed earlier in the dive when they were in tuck position? (c) Does the transition from tuck to fully extended require extra energy to be provided by the diver's muscles?
University Physics Volume 1
18th Edition
ISBN:9781938168277
Author:William Moebs, Samuel J. Ling, Jeff Sanny
Publisher:William Moebs, Samuel J. Ling, Jeff Sanny
Chapter11: Angular Momentum
Section: Chapter Questions
Problem 55P: A diver off the high board imparts an initial rotation with his body fully extended before going...
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