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A small cuckoo clock has a pendulum 25 cm long with a mass of 10 g and a period of 1 s. The clock is

A small cuckoo clock has a pendulum 25 cm long with a mass of 10 g and a period of 1 s. The clock is powered by a 200 g weight which falls 2 m between the daily windings. The amplitude of the swing is 0.2 rad. What is the Q of the clock? How long would the clock run if it were powered by a battery with 1J capacity?

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