Work, Energy and Power

Cards (5)

  • Power
    The rate at which work is done or energy is expended.
  • Work-energy Theorem
    The work done on an object by a net force is equal to the change in the objects kinetic energy.
  • Conservative force
    A force for which the work done in moving an object between two points is independent of the path taken. E.g.) Gravitational Force, Spring Force, and Electrostatic Force.
  • Non-conservative
    A force for which the work done in moving an object between two points depends on the path taken .E.g.) Friction, Air resistance, and Tention in a cord.
  • State the principle of conservation of mechanical energy. 

    The total mechanical energy (Ek + Ep) in an isolated system remains constant.