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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.
Energy resources are key limiting factors to economic growth. The world use of energy resources, especially oil, continues to grow, with ominous consequences economically, socially, politically, and environmentally. We will briefly examine the world’s energy use patterns at the end of this chapter.
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
Teacher Toolkit - 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 amount of each form, and
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
2.1 Experiment 1: Work and the Inclined Plane. For our first experiment we will use a force parallel to an inclined plane to pull a cart up the inclined plane at a constant velocity. We will measure the force required to do this and then calculate the work involved in this process.
