POTENTIAL ENERGY

  • the gravitational potential energy of an object at a point above the ground is defined as the work done in raising it from the ground to that point against gravity.
  • the work done on the object against gravity be W. That is,work done,
    W = force × displacement
    = mg × h
    = mgh
  • the potential energy (EP) of the object.
    Ep = mgh
  • It is useful to note that the work done by gravity depends on the difference in vertical heights of the initial and final positions of the object and not on the path along which the object is moved.
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