A Radi, HafezO Rasmussen, John2020-02-122020-02-122013Print ISBN 978-3-642-23025-7Online ISBN 978-3-642-23026-4https://doi.org/10.1007/978-3-642-23026-4_6https://t.ly/dNZYAMSA Google ScholarWork , energy , and power are words that have different meanings in our everyday life. Nevertheless, physicists give them specific definitions, which we present in this chapter. The work-energy power approach provides identical results to those obtained by Newtonian mechanics, but usually with simpler analysis, especially when dealing with complex situations where forces are not constant. Therefore, we will introduce two extremely important concepts: the work-energy-theorem and conservation of energy .enApplied ForceMechanical EnergyFrictional ForceSpring ForceGravitational Potential EnergyBook chapterhttps://doi.org/10.1007/978-3-642-23026-4_6