K=2PmK=\frac{2 P}{m}K=m2P
K=P2mK=\frac{P}{2m}K=2mP
K=2P22 m\mathrm{K}=\frac{2 \mathrm{P}^{2}}{2 \mathrm{~m}}K=2 m2P2
K=P22mK=\frac{P^{2}}{2 m}K=2mP2