ચકગતિ ઉર્જા \({E_R}\,\, = \,\,\frac{1}{2}{\omega ^2}\,\,\)
\(\therefore \,\,{E_{R\,}} \propto \,\,I\,\, \times \,\,\frac{1}{{{I^2}}}\,\,\, \propto \,\,\frac{1}{I}\)
\(\frac{{{E_2}}}{{{R_1}}} = \,\,\frac{{{I_1}}}{{{I_2}}}\,\, = \,\,\frac{I}{{2I}}\,\,\,\)
\(\therefore \,\,{E_2}\,\, = \,\,\frac{{{E_1}}}{2}\,\, = \,\,\frac{K}{2}\)