A physics teacher on a spinning chair has a moment of inertia of 4.2 kg m^2 with his arm outstretched. When he pulls his arms

Question

A physics teacher on a spinning chair has a moment of inertia of 4.2 kg m^2 with his arm
outstretched. When he pulls his arms in, his moment of inertia is reduced to 1.2 kg m^2. If he starts
with arms outstretched with an angular velocity of 14 revolutions-per-minute (rpm), what will his
angular velocity be when he pulls in his arms? (Answer in rpm)

Kunduz · Accepted Answer

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