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The position of a certain system with mass of 10 kg exhibits simple harmonic motion, where...

The position of a certain system with mass of 10 kg exhibits simple harmonic motion, where x(t) = 20 cos(15.2t + ?/4) and is in units of meters. (a) What is the total energy of the system (let the potential energy be zero at the equilibrium position)? (b) At t = 0, what is the potential energy? (c) Kinetic energy?

Please answer with the concept of SHM

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