22   20 A garden ornament consists of a metal flamingo suspended from a spring as shown. The spring is hung from a support using the hook. flamingo hook spring (a) The mass of the flamingo is 65 g. When the flamingo is suspended vertically the spring extends by 8.5 cm. The flamingo is pulled downwards by a small extra displacement and then released. The flamingo undergoes simple harmonic motion vertically. The instructions state that the flamingo will oscillate with a frequency of 2.5 Hz. Deduce whether this statement is correct. 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Turn over 23   (b) After being set into vertical oscillation, the flamingo comes to rest after a short time. Explain why the flamingo comes to rest. 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(c) In a slight breeze the flamingo swings from side to side and behaves as a simple pendulum. (i) Show that the period of oscillation of the flamingo pendulum is about 2.2 s. pendulum length = 1.25 m (2) .................................................................................................................................................................................................................................................. .................................................................................................................................................................................................................................................. .................................................................................................................................................................................................................................................. .................................................................................................................................................................................................................................................. (ii) The amplitude of oscillation of the flamingo pendulum is 7.5 cm. Calculate the maximum velocity of the flamingo pendulum. 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Maximum velocity = ...................................................... (Total for Question 20 = 12 marks)