Work and Force

• Power


  The rate at which work is done
• The SI unit of power is the watt (W)
• 1 W = 1 J/s
• 1 kW = 1 kJ/s
• Work


  The product of the force applied to an object and the displacement of the object
• Unit of work is Nm or J (Joules)
• Work is positive when the force is in the same direction of the displacement
• Work is negative when the force is in the opposite direction of the displacement
• If the force applied to an object is not parallel to the displacement

  Work done is the product of the force's component parallel to the displacement and the displacement of the object
• Unit of work is Nm or J (Joules)