K=2P2 m\mathrm{K}=\frac{2 \mathrm{P}^{2}}{\mathrm{~m}}K= m2P2
K=2Pm\mathrm{K}=\frac{2 \mathrm{P}}{\mathrm{m}}K=m2P
K=P2mK=\frac{P}{2 m}K=2mP
K=P22 m\mathrm{K}=\frac{\mathrm{P}^{2}}{2 \mathrm{~m}}K=2 mP2