P1.9

• Power


  The rate of energy transfer or the rate of doing work
• Power


  • Measured in watts
  • 1 watt = 1 joule of energy transferred per second
• Calculating power


  1. Power (W) = Energy transferred (J) / Time (s)

  2. Power (W) = Work done (J) / Time (s)
• A powerful machine transfers a lot of energy in a short space of time
• What is the word equation for calculating power?

  Power (W) = Work Done (J) / Time (s)