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A mass on a spring with constant 3.45 N/m vibrates with position given by the equation...

A mass on a spring with constant 3.45 N/m vibrates with position given by the equation x = (5.00 cm) cos(4.40t rad/s).

(a) During the first cycle, for 0 < t < 1.43 s, just when is the system's potential energy of the system changing most rapidly into kinetic energy?

first time s
second time s

(b) What is the maximum rate of energy transformation?
mW

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