A clock pendulum oscillates at a frequency of 2.5 Hz. At t = 0, it is released

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A clock pendulum oscillates at a frequency of 2.5 Hz. At t = 0, it is released from rest starting at an angle of 15o to the vertical. Ignoring friction, what will be the position (angle) of the pendulum at
(a) t = 0.25s,
(b) t = 1.60s, and
(c) t = 500 s?
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Fundamentals of Physics

ISBN: 978-0471758013

8th Extended edition

Authors: Jearl Walker, Halliday Resnick

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