Energy stores, work and power

Learning objectives

Identify the energy stores (kinetic, gravitational potential, chemical, elastic, nuclear, electrostatic and internal) and describe how energy is transferred between them by mechanical work, electrical work, heating and waves

Calculate kinetic energy using Ek = ½mv² and changes in gravitational potential energy using ΔEp = mgΔh (Extended)

Apply the principle of conservation of energy to simple processes using energy flow diagrams, and at Extended to multi-stage processes including Sankey diagrams

Define work done as the energy transferred when a force moves through a distance and use W = Fd = ΔE

Define power as the rate of energy transfer or rate of doing work and use P = ΔE/t = W/t