Work, Energy & Power

Work, Energy & Power

1. Work

   • Force x Displacement
   • Joules (J)
   • Scalar quantity

2. Energy

   • The ability to do work
   • Scalar quantity
   • Joules (J)
   • Forms of Energy
     • Kinetic energy
     • Potential energy
     • Thermal energy
     • Sound energy
     • Electromagnetic energy
     • Chemical energy
     • Nuclear energy
   • Principle of conservation of energy
     • Energy cannot be created or destroyed
     • It can be converted from one form to another

3. Power

   • The rate at which work is done
   • Work/ time
   • Scalar quantity
   • Watt (W)
   • Percentage Efficiency
     • Po(100)/Pi
       • Po = Power output
       • Pi = Power input