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The position of an object in simple harmonic motion as a function of time is given...

The position of an object in simple harmonic motion as a function of time is given by ? = 3.8??? (5??/4 + ?/6) where t is in seconds and x in meters. In t = 2.0s calculate (a) the period, (b) the oscillation frequency (c) velocity and (d) acceleration.   

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