$${P_k = \frac{1}{2} \mu v \omega^2 y_m^2 \\ = (\frac{1}{2})(0,525\, \mathrm{kg/m})(9,26\, \mathrm{m/s}) \times (754\, \mathrm{rad/s})^2(0,0085\, \mathrm{m})^2 \approx \underline{\underline{100\, \mathrm{W}}}}$$