A pendulum 80.0 cm long is pulled to the side so that its bob is raised 20.0
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A pendulum 80.0 cm long is pulled to the side so that its bob is raised 20.0 cm from its lowest position, and is then released. As the 50.0 g bob moves through its lowest position,
(a) What is its speed and
(b) What is the tension in the pendulum cord?
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