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Potential Energy

Elevation and potential energy

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When a body of mass is elevated against the gravitational force the potential energy can be expressed as

Ep = Fg dh

    =  m g dh         (1)

where

Fg = gravitational force (weight) acting on the body (N)

Ep = potential energy (J)

m = mass of body (kg)

g = gravitational acceleration (9.81 m/s2)

dh = change in elevation (m)

Example - Potential Energy when body is elevated

A body of 1000 kg is elevated 10 m. The change in potential energy can be calculated as

 Ep = (1000 kg) (9.81 m/s2) (10 m)

    = 98100 J

    = 98 kJ

    = 0.027 kWh

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Related Topics

  • Mechanics Kinematics, forces, vectors, motion, momentum, energy and the dynamics of objects
  • Dynamics Motion - velocity and acceleration

Related Documents

  • Heat, Work and Energy Tutorial to heat, work and energy - essentials as specific heat and specific heat capacity
  • Equation of Mechanical Energy The equation of mechanical energy in terms of Energy per Unit Mass, Energy per Unit Volume and Energy per Unit Weight involving head
  • Work The amount of work done is the product of the applied force and the distance
  • Energy Energy is the capacity to do work

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Resources, Tools and Basic Information  for Engineering and Design of Technical Applications!

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