A physics student, bored by a lecture on simple harmonic motion, idly picks up his
Chapter 13, Problem 45(choose chapter or problem)
A physics student, bored by a lecture on simple harmonic motion, idly picks up his pencil (mass 9.2 g, length 17 cm) by the tip with his frictionless fingers, and allows it to swing back and forth with small amplitude. If the pencil completes 6279 full cycles during the lecture, how long does the lecture last?
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