Work and power: Energy: Physics: GCSE (9:1)

• Work


  The measure of energy transfer when a force moves an object through a distance

  
• W = Fs

  The equation linking work, force and distance moved in the direction of the force (displacement)

  
• W

  The symbol for work

  
• F


  The symbol for force

  
• s

  The symbol for distance moved in the direction of the force (displacement)

  
• Joules (J)

  The SI unit for energy and work

  
• Newtons (N)


  The SI unit for force

  
• Metres (m)


  The SI unit for distance

  
• Power


  The rate at which energy is transferred or work is done

  
• P = W/t


  The equation linking power, work and time

  
• P


  The symbol for power
• t


  The symbol for time
• Watts (W)


  The SI unit for power

  
• Seconds (s)


  The SI unit for time

  
• What one watt is equal to

  An energy transfer of one joule per second (1 W = 1 J/s)