A mass of 1 kg is suspended from a spring whose spring constant is 9 N/m. The mass is initially released from a point 1 m above the equilibrium position with an upward velocity of √3 m/s. Find the times for which the mass is heading downward at a velocity of 3 m/s. (Enter your answers as a comma-separated list. Let n represent an arbitrary integer.) t = 5π 18 + 2nπ 3 XS

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