(a) "A=L\/2=2\/2=1mm"
(b) "v=\\omega A=2\\pi fA=2\\cdot3.14\\cdot120\\cdot0.001=0.75m\/s"
(c) "a=\\omega^2A=(2\\pi f)^2A=(2\\cdot3.14\\cdot 120)^2\\cdot 0.001=568m\/s^2"
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