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