Physics - Rotation Question with Solution | TestHub

${\mathrm{I}}_1{\mathrm{\omega }}_1={\mathrm{I}}_2{\mathrm{\omega }}_2$

$\mathrm{M}{\mathrm{K}}_1^2\frac{2\mathrm{\pi }}{{\mathrm{T}}_1}=\mathrm{M}{\mathrm{K}}_2^2\frac{2\mathrm{\pi }}{{\mathrm{T}}_2}$

$\frac{T_2}{T_1}={\left(\frac{K_2}{K_1}\right)}^2$

T₂= 0.64 × 0.5

= 0.32 sec