A 050-Kg Mass Is Suspended from a Massless Spring That Has

question 121

Multiple Choice

A 0.50-kg mass is suspended from a massless spring that has a force constant of 79 N/m. The mass is displaced 0.1 m down from its equilibrium position and released. If the downward direction is negative, the displacement of the mass as a function of time is given by

• A) y = 0.1 cos158t - \(\pi\))
• B) y = 0.2 cos158t - \(\pi\))
• C) y = 0.1 cos12.6t - \(\pi\))
• D) y = 0.2 cos12.6t + \(\pi\))
• E) y = 0.1 cos2t + \(\pi\))

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