Problem

The 30 kg pendulum has its mass center at G and a radius of gyration about point G of kG...

The 30 kg pendulum has its mass center at G and a radius of gyration about point G of kG = 300 mm. If it is released from rest when θ = 0°, determine its angular velocity at the instant θ = 90°. Spring AB has a stiffness of k = 300 N/m and is unstretched when θ = 0°.

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