They are crushed down and melted, the full bottle doesn't get recycled because it is made of toxins so some of each bottle has to be thrown away into some landfill to decompose. But this is bad because plastic toxins take years to decompose and it is adding up
Total mechanical energy = kinetic energy + potential energy E = KE + PE E = ½mv² + mgh E = ½(0.1 kg)(2 m/s)² + (0.1 kg)(9.8 m/s²)(1.5 m) E = 0.2 J + 1.47 J E = 1.67 J