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20 March, 11:28

A diver in midair has an angular velocity of 6.0 rad/s and a moment of inertia of 1.2 kg·m2. He then pulls is arms and legs into a tuck position and his angular velocity increases to 12 rad/s. The net external torque acting on the diver is zero. What is his moment of inertia in the tuck position?

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  1. 20 March, 12:33
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    0.6 kg m²

    Explanation:

    Angular momentum is conserved.

    Iω = Iω

    (1.2 kg m²) (6.0 rad/s) = I (12 rad/s)

    I = 0.6 kg m²
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