Potential and Kinetic Energy

In class, we are learning about potential and kinetic energy. At the top of the slide before I started sliding down, my potential energy in relation to the bottom of the slide is equal to my mass times 9.8g times the height from the top of the slide to the ground. My kinetic engery at this moment is zero because kinetic energy is equal to half of my mass times velocity squared, and I have zero velocity. As I started sliding down the slide, my kinetic energy raised because I was gaining velocity, but my potential energy lowered because the height was lowering. Althought the potential and kinetic energy was changing as I slided down, the total energy (potential + kinetic) remained constant at any point. This explains the conservation of energy. At the bottom of the slide, I came to a stop and my potential and kinetic energy both became zero.