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A mass of 0.12 kg is attached to a spring and set into oscillation on a...

A mass of 0.12 kg is attached to a spring and set into oscillation on a horizontal frictionless surface. The simple harmonic motion of the mass is described by x(t) = (0.22 m)cos[(14 rad/s)t]. Determine the following.

Figured out all parts except:

(e) time it takes the mass to get to the position x = −0.10 m after it has been released

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