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A 0.69 kg mass at the end of a spring vibrates 4.0 times per second with...

A 0.69 kg mass at the end of a spring vibrates 4.0 times per second with an amplitude of 0.13 m .

A) Determine the velocity when it passes the equilibrium point.

B) Determine the velocity when it is .11 m from equilibrium.

C) Determine the total energy of the system.

D) Determine the equation describing the motion of the mass, assuming that x was a maximum at t=0.

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