A particle (m = 3 kg) slides down a frictionless track (AOC) starting from rest at a point A (height 2m). After reaching C, the particle continues to move freely in air as a projectile. When it reaching its highest point P (height 1.5 m) the kinetic energy of the prarticle (in J) is : Figure drawn is schematic and not to scale , take g = `10 ms^(-2)`

Answer

15

Explanation

`k.E = mg xx 0.5 = 3xx 10 xx 0.5 = 15J`