A figure skater spins with arms extended at

PHYSICS · Subjective · CBSE · Physics · System of Particles and Rotational Motion · System of Particles and Rotational Motion

Problem

A figure skater spins with arms extended at 2.0 rad s−12.0\,\text{rad}\,\text{s}^{-1}. Pulling her arms in reduces her moment of inertia from 4.0 kg m24.0\,\text{kg}\,\text{m}^2 to 1.5 kg m21.5\,\text{kg}\,\text{m}^2. Calculate her new angular speed, to two significant figures.

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