Mechanical energy

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The grade 10 presentation on mechanical energy

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Mechanical energy

  1. 1. 1 Everything Science www.everythingscience.co.za 22. Mechanical energy Physics: Mechanics Grade 10
  2. 2. 2 Everything Science www.everythingscience.co.za Potential energy Potential energy is the energy an object has due to its position or state. The gravitational potential energy of an object is the energy the object has because of its position in the gravitational field relative to some reference point. EP=mgh
  3. 3. 3 Everything Science www.everythingscience.co.za Kinetic energy The kinetic energy of an object is the energy the object has due to its motion. EK = 1 2 mv2
  4. 4. 4 Everything Science www.everythingscience.co.za Mechanical energy The mechanical energy of an object is the sum of the potential energy and kinetic energy of the object. EM=EK +EP EM=mgh+ 1 2 mv2
  5. 5. 5 Everything Science www.everythingscience.co.za Conservation of energy The Law of Conservation of Energy states that energy cannot be created or destroyed, but can only be changed from one form into another. The Law of Conservation of Mechanical Energy states that the total mechanical energy of an isolated system (i.e. no friction or air resistance) remains constant.
  6. 6. 6 Everything Science www.everythingscience.co.za For more practice or to ask an expert for help on this section see: www.everythingscience.co.za Shortcode: ESAHJ
  7. 7. 6 Everything Science www.everythingscience.co.za For more practice or to ask an expert for help on this section see: www.everythingscience.co.za Shortcode: ESAHJ

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