A mass weighing 10 pounds stretches a spring 1 4 foot. This mass is removed and replaced with a mass of 1.6 slugs, which is initially released from a point 1 3 foot above the equilibrium position with a downward velocity of 5 4 ft/s.
A) Express the equation of motion in the form given in (6).
B) Express the equation of motion in the form given in (69).
C) Use one of the solutions obtained in parts (a) and (b) to determine the times the mass attains a displacement below the equilibrium position numerically equal to 1 2 the amplitude of motion.
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