Given the following, a 54g oscillating mass has a position of x(t) = (1.6cm)cos10t, where t is in seconds. The amplitude is 1.6, the period is 0.63s, the spring constant is 5.4 N/m, Vmax is 0.16 m/s, and the total energy is Wtotal = 6.9*10^-4 J.
What is the velocity at t = 0.41 s?