Dynamics of Rotational Motion: Rotational Inertia (Problem 19)

Unreasonable Results 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 $0.050\text{kg}\cdot {\text{m}}^2$. (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? Select the answer to part (a).