At the end of this lesson you should be able to :

• Define the terms, Work, Power, Kinetic Energy, Gravitational Potential Energy, Joule, Watt, Work-Energy Theorem, Law of Conservation of Energy.
• Compute the work done by a specified force on an object when the object is moved through a given distance.
• Compute the power expended by a force.
• Compute changes in gravitational potential energy and changes in kinetic energy.
• Distinguish between a conservative and a non conservative force.
• State what happens to the energy lost when work is done against friction forces.
• Use the law of conservation of energy.
• Compute IMA and AMA and efficiency of a simple machine.