'This software implements a few elementary simulations of classical physics. \r\n\r\nIt has a gravitational simulation named "A Fictional Universe". Sometimes it is possible to watch the formation of objects representing approximately a planet and its satellite.\r\n\r\nIn the simulation "Fifty balls; Weightless (gas simulation approach). Piston under gravity.", it is possible to study the concepts of force and energy. The user can increase the energy of the system in real time (through heat, using the \'→\' and \'←\' keys). Thus, you can check the rise, on average, of the potential energy of the piston (work done by the system). In this way, the program can illustrate the First Law of Thermodynamics, approximately.\r\n\r\nIt is possible to make or edit a .txt file (plain text), following the instructions, to program all the parameters and simulate, for example, a simplified satellite launching. One ball will be the planet and the other the satellite. The challenge is to choose the launching and orbit speeds.'