POWER

  • According to this law, energy can only be converted from one form to another; it can neither be created or destroyed. The total energy before and after the transformation remains the same.
  • law of conservation of energy is valid in all situations and for all kinds of transformations.
  • The sum of kinetic energy and potential energy of an object is its total mechanical energy.
  • potential energy + kinetic energy = constant
  • mgh + mv^2= constant.
  • We find that during the free fall of the object, the decrease in potential energy, at any point in its path, appears as an equal amount of increase in kinetic energy.
  • There is thus a continual transformation of gravitational potential energy into kinetic energy.
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