A man on flat ice, his arms outstretched, is rotating about the vertical axis with angular speed, ωi = 20 rad/s. He pulls the arms in towards the axis to reduce his rotational inertia from, Ii = 2.4 kg-m2 to, If = 1.6 kg-m2. What is his angular speed wf after pulling the arms towards the axis?

A man on flat ice, his arms outstretched, is rotating about the vertical axis with angular speed, ωi = 20 rad/s. He pulls the arms in towards the axis to reduce his rotational inertia from, Ii = 2.4 kg-m2 to, If = 1.6 kg-m2. What is his angular speed wf after pulling the arms towards the axis?

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Question

A man on flat ice, his arms outstretched, is rotating about the vertical axis with angular speed, ω_i = 20 rad/s. He pulls the arms in towards the axis to reduce his rotational inertia from, I_i = 2.4 kg-m² to, I_f = 1.6 kg-m². What is his angular speed w_f after pulling the arms towards the axis?

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