Work done

  • When objects  interact, the forces between them can lead to enrgy being transferred. 
  • Sometimes the energy is stored in a useful form. 
  • Sometimes energy is due to the speed of a moving object.
  • The thermal energy content of an object may be increased. 

Work done by a force

  • Work done = force x perpendicular distance moved in the direction of the force. 
  • Forces occur in opposing pairs; so the force you exert to lift…


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