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Angular Momentum — Spinning Disc
Change a spinning body's moment of inertia and watch its spin rate answer.
About this simulation
A skater pulling their arms in, or a second disc dropped onto a spinning one — either way L = Iω stays fixed while ω jumps as the moment of inertia changes. Bars for I, ω and L make the conservation visible, and a rotational-KE readout shows where energy goes when two discs couple.
