\begin{equation*} \begin{split} & EM_{(1)} = EM_{(2)} \\\\ & EP_{(1)} + EK_{(1)} = EP_{(2)} + EK_{(2)} \\\\ & EP_{(1)} + EK_{\text{translasi }(1)} + EK_{\text{rotasi }(1)} = EP_{(2)} + EK_{\text{translasi }(2)} + EK_{\text{rotasi }(2)} \\\\ & m \:.\: g \:.\: h_1 + \tfrac 12 \:.\: m \:.\: v_1^2 + \tfrac 12 \:.\: I \:.\: \omega_1^2 = m \:.\: g \:.\: h_2 + \tfrac 12 \:.\: m \:.\: v_2^2 + \tfrac 12 \:.\: I \:.\: \omega_2^2 \end{split} \end{equation*}

Perlu diingat juga:

Momen inersia

(1)   silinder pejal = \(\tfrac 12 mR^2\)

(2)   bola pejal = \(\tfrac 25 mR^2\)

Hubungan antara \(v\) dan \(\omega\)

\(v = \omega \:.\: R\)