In Roller Coaster Tycoon, your main goal is to build an amusement park with the coolest rides to get the most profit possible. Your main weapon in your arsenal is the rollercoaster of course, which relies on a basic principle of physics to work. The carts are pulled up to the top of a hill by a chain system similar to that of a bike, and are then released at the top and fly down the hill at immense speeds. This is because of the law of conservation of energy. As the carts are pulled higher, their gravitational potential energy (pe=mgh) is rising. As they fly down the hill, the potential energy is converted to kinetic (ke=1/2mv^2). Aside from the physics of it all, rollercoasters are just another great application of physics in the everyday world.