diffrent types of energy

discussionsummarypracticeproblems
    different types of energy
  • Definition
    • A system possesses energy if it has the ability to do work.
  • Energy…
    • is an abstract scalar quantity
    • is a quantity that an object or system of objects is said to possess
    • is not a thing that can be measured
    • is a quantity that acquires meaning only through computation
  • Forms
    • Potential Energy
      • Definitions
        • energy due to arrangement
        • energy due to position (of a quantity in a field)
      • Types
        • gravitational potential energy
        • electromagnetic potential energy
          • electric potential energy
          • magnetic potential energy
          • chemical potential energy
          • elastic potential energy
        • strong nuclear potential energy
        • weak nuclear potential energy
    • Kinetic Energy
      • Definition
        • energy due to motion
      • Types
        • mechanical energy: macroscopic motion
        • heat (thermal energy, internal energy): random motion of microscopic particles
        • electrical energy: bulk flow of charged particles
        • electromagnetic radiation:
          • propagating disturbance of electric and magnetic fields (classical physics)
          • motion of photons (modern physics)
  • Work-Energy Theorem
    • Work is done when the energy of an object changes form (energy transduction).
    • Work is done when energy is transfered from one object to another (energy transfer).
    • Work is a change in energy.
    abbreviated version
    W = ΔE 
     
    algebra version 
    Δs cos θ = ΔE 
     
    calculus version 

    F · ds = ΔE
  • Units
    • The SI unit of work and energy is the joule, named after the English physicist and brewer James Joule (1818–1889).

      [J = Nm = kg m2/s2]

    • The electron volt is an acceptable non SI unit of energy. It is used for some applications in electromagnetism; solid state, atomic, nuclear, and particle physics; and related sciences like biophysics, chemistry, and astronomy. An electronvolt is the work done a particle with one elementary charge when it is moved between two points with a potential difference of one volt. It is described in more detail in the section on electric potential (a.k.a. voltage).

      1 eV = (1.6 × 10−16 C)(1 V) = 1.6 × 10−16 J

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