How is the energy transformed in electric energy plants in roller coasters and by machine?

In electric energy plants, energy transformation occurs when mechanical energy from sources like wind, water, or fossil fuels is converted into electrical energy through generators. In Roller Coasters, gravitational potential energy is converted to kinetic energy as the coaster descends, with some energy also transformed into mechanical work due to friction and air resistance. Machines can convert electrical energy into mechanical energy to perform various tasks, utilizing motors to create movement or operations. Overall, these systems illustrate the conversion and transfer of energy across different forms to achieve desired outcomes.