The pendulum consists of a slender rod AB of mass M₁ and a disk of mass M₂. It is released from rest without rotating. When it falls a distance d, the end A strikes the hook S, which provides a permanent connection. Determine the angular velocity of the pendulum after it has rotated 90°. Treat the pendulum’s weight during impact as a nonimpulsive force.

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Given: M₁ = 2kg M₂ = 5kg d = 0.3m r = 0.2m 1 = 0.5m