Coaxial Rotational Collisions

When two rotating objects collide while spinning coaxially, meaning their rotation axes are aligned, and then separate, we use conservation of angular momentum to determine the final rotational states of the objects. No external torques act during the brief collision, so total angular momentum is conserved.

Solving for Missing Variables

Consider two disks with moments of inertia $I_1$ and $I_2$.

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