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**Simple harmonic motion question!!**

## Homework Statement

A mass undergoing simple harmonic motion has a displacement of X = 0.5 m and V = 4 m/s at one time and x=.25 and V = -8. what is the period of this oscillation?

## Homework Equations

X(t) = Acos (wt + phi)

V(t) = -Awsin (wt + phi)