# #

The displacement of a mass from its equilibrium position as it oscillates on a horizontal spring satisfies the equation $$x(t)= Acos(\omega t + \phi_0)$$

At $$t = 0 s$$, what are the two possible values of the x-components of the velocity of the mass ($$v_x$$) in terms of $$v\_{max}$$ that are found when $$x = - \frac{A}{2}$$, and which value of $$\phi_0$$ does each belong to?

## Part 1#

Enter the higher value here.