A mass is attached to a hanging spring and undergoes simple harmonic motion about an equilibrium location where t is the number of πt at y = 0. The displacement of the mass (in cm) is given by y = -6 cos seconds since the mass was initially pushed or pulled from equliibrium. Assume positive displacement means the mass is above equlibrium. a) What is the period of this motion? seconds b) List the first TWO times the mass passes through the equilibrium location, separated by commas. seconds c) When does the mass first reach y = 3 cm? seconds

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