a
\(\frac{{{K_1}}}{{{K_2}}}\,\, = \,\,\frac{{{m_2}}}{{{m_1}}}\,\, \Rightarrow \,\,\frac{{216}}{{{K_2}}}\,\, = \,\,\frac{3}{1}\,\, \Rightarrow \,\,{K_2}\,\, = \,\,\frac{{216}}{3}\,\, = \,\,72\,\,J\)

ભારે ટુકડા નું વેગમાન \(P\,\, = \,\,\sqrt {2mK} \,\, = \,\,\sqrt {2\,\, \times \,\,9\,\, \times \,\,72} \,\,\, = \,\,36\,\,kgm/s\)

નોંધ : અહી વજનદાર ભાગ નું દળ \( = \,\,\frac{3}{4}\,\, \times \,\,12\,\, = \,\,9kg\)