Work, Energy & Efficiency

Objectives

• Show knowledge and understanding of the concept of energy and energy transfer processes
• Perform calculations involving force, work and energy
• Make measurements of factors used in the calculation of energy

Theory Presentations/Assessment - Work and Energy

• Energy and Machines
• Force and Motion
• Force Equation
• Gravitational Force
• Work
• Examples of Work
• Work and Machines
• Mechanical Energy
• Potential Energy
• Gravitational Potential Energy
• Kinetic Energy
• Electrical Energy
• Energy Transfer
• From Electrical to Mechanical
• Conservation of Energy
• Efficiency
• Efficiency in a Motor
• Energy and Power
• Summary

Activity - Energy Efficiency

• Students use a retort stand, a mass set and a digital multimeter to calculate the efficiency of a lifting system by calculating the electrical energy supplied to, and the mechanical energy produced by, a motor and gearbox.