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Trigonometry 11 Online
OpenStudy (anonymous):

A mass is attached to hanging spring. From equilibrium the mass is raised 1 foot and released with a velocity of V ft/sec (Consider downward as the positive direction). If the displacement of the mass is described by the equation y(t)=cos(w)(t )+ v/w sin(w)(t) with w=2, determine the values of initial velocity which result in an amplitude of 4 feet.

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