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Back to 10.3 Dynamics of Rotational Motion: Rotational Inertia

Unreasonable Results

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A gymnast doing a forward flip lands on the mat and exerts a 500-N ∙ m torque to slow their angular velocity to zero. Their initial angular velocity is 10.0 rad/s, and their moment of inertia is 0.050 kg⋅m20.050 \text{kg} \cdot \text{m}^{2}. (a) What time is required for the gymnast to exactly stop their spin? (b) What is unreasonable about the result? (c) Which premises are unreasonable or inconsistent?

OpenStax College Physics 2e, 10.3 Dynamics of Rotational Motion: Rotational Inertia, exercise 22

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Adapted from College Physics © 2022 Rice University. Licensed under CC BY 4.0. Sources: College Physics 2e, College Physics for AP® Courses 2e. Imported at revision f98d7a7.