Question: Object (A), at rest on a low-friction table, is struck a glancing blow by object (mathrm{B}). Show that, if the collision is elastic and the

Object $A$, at rest on a low-friction table, is struck a glancing blow by object $\mathrm{B}$. Show that, if the collision is elastic and the two objects have equal inertias, the angle between the final directions of motion of the two objects is 90°.

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