Question: A 4-lb weight is attached to a spring having a stiffness k = 10 lb/ft. The weight is drawn downward a distance of 4 in.

A 4-lb weight is attached to a spring having a stiffness k = 10 lb/ft. The weight is drawn downward a distance of 4 in. and released from rest. If the support moves with a vertical displacement δ = (0.5 sin 4t) in., where t is in seconds, determine the equation which describes the position of the weight as a function of time.

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