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PF1.5: WORK, ENERGY AND POWER. Energy exists in many different forms, eg, kinetic energy Ek, potential energy Ug, electrical energy, and elastic (or spring) energy Es. A fundamental principle of nature is that energy cannot be created or destroyed, only transformed or transferred.
Use the equations for mechanical energy and work to show what is work and what is not. Make it clear why holding something off the ground or carrying something over a level surface is not work in the scientific sense.
7.8.Work, Energy, and Power in Humans • Explain the human body’s consumption of energy when at rest vs. when engaged in activities that do useful work. • Calculate the conversion of chemical energy in food into useful work.
The Basics of Work, Energy, and Power Objectives: 1. To describe the conditions under which positive and negative work are done and to use the work equation to calculate the amount of work done. 2. To define potential energy, to identify the two forms and the variables that affect the
Chapter 6: Work, Energy and Power Tuesday February 10th Reading: up to page 88 in the text book (Ch. 6) •Finish Newton’s laws and circular motion •Energy • Work (definition) • Examples of work •Work and Kinetic Energy •Conservative and non-conservative forces •Work and Potential Energy •Conservation of Energy
The work-energy theorem states that the net (total) work done on a system is equal to its increase in kinetic energy. You will determine the work done on a (nearly) frictionless cart and show that
By the end of this section, you will be able to: Express electrical power in terms of the voltage and the current. Describe the power dissipated by a resistor in an electric circuit. Calculate the energy efficiency and cost effectiveness of appliances and equipment.
