In a science museum a 130kg brass pendulum bob swings at, Ask an Expert

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In a science museum, a 130kg brass pendulum bob swings at the end of a 13.7m -long wire. The pendulum is started at exactly 8:00 a.m. every morning by pulling it 1.6m to the side and releasing it. Because of its compact shape and smooth surface, the pendulum's damping constant is only 0.010kg/s.

A) At exactly 12:00 noon, how many oscillations will the pendulum have completed?

B) And what is its amplitude?

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