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Work, Energy And Power

Work – energy theorem

  • Work done by net force is equal to the change in kinetic energy of the body
  • (Dot product, hence it is a scalar quantity)
  • No work is done if
    • displacement is zero

    • force is zero

    • force and displacement are mutually perpendicular i.e.,


  • Kinetic energy, 


  • Work done by variable force


  • Work done is the area subtended by the …

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