roblem 1: A simple harmonic oscillator is composed of a mass hanging from a spring. The mass of the hanging object is 400 g and the spring constant is 0.8 N/m at the time ? = 0 ?, the mass is 2cm above its equilibrium position. The amplitude of the oscillation is 5 cm. a) What is the initial phase? b) Find one of the times where the mass is located at 3cm above equilibrium. c) Find the kinetic and potential energies at ? = 1s. d) What is the maximum kinetic energy? Answers: 0.41 rad, 0.16 s, 6.36E(-5) J; 9.36E(-4) J, 1E(-3)

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