A particle ( m =1 kg ) slides down a frictionless track (AOC) starting from rest at a point A (height 2 m). After reaching C, the particle continues…

A particle ( $\displaystyle \mathrm{m}=1 \mathrm{~kg}$ ) slides down a frictionless track (AOC) starting from rest at a point A (height $\displaystyle 2$ m). After reaching C, the particle continues to move freely in air as a projectile. When it reaching its highest point P (height $\displaystyle 1$ m), the kinetic energy of the particle (in J ) is : (Figure drawn is schematic and not to scale; take $\displaystyle \mathrm{g}=10 \mathrm{~ms}^{-2}$ ) \_\_\_\_.