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posted by Christie Saturday, March 3, 2012 at 9:36pm.

If a trapeze artist rotates once each second while sailing through the air and contracts to reduce her rotational inertia to one-third of what it was, how many rotations per second will result?

3 rotations/sec, since the (moment of inertia)x(rotation rate) product must stay the same. It is a measure of angular momentum.

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