\(\Rightarrow\) \({v_{rms}} \propto \sqrt {\frac{P}{m}} \)
\(\Rightarrow\) \(\frac{{{v_1}}}{{{v_2}}} = \sqrt {\frac{{{P_1}}}{{{P_2}}} \times \frac{{{m_2}}}{{{m_1}}}} \) \(\Rightarrow\) \(\frac{v}{{2v}} = \sqrt {\frac{{{P_0}}}{{{P_2}}} \times \frac{{m/2}}{m}} \) \(\Rightarrow\) \({P_2} = 2{P_0}\)