Work and Energy

The Physics of Work Video Tutorial explains the concept and mathematics of work. The definition of work the means of identifying work, the mathematical formula and associated unit for work, and the distinction between positive and negative work are emphasized.

The Work Calculations Video Tutorial explains how to use the work equation to analyze and solve a physics situation involving a work calculation. Six examples of varying difficulty are discussed. Give Mr. H less than 9 minutes of your time and become a superstar at calculating work.

The Potential Energy Video Tutorial discusses the nature of potential energy as an energy stored in an object as a result of its position. Both gravitational and elastic potential energy are discussed and numerous examples are provided with attention given to both the conceptual and the mathematical aspects of these two energy forms.

The Kinetic Energy Video Tutorial explains the meaning of kinetic energy and discusses how to determine if an object possesses kinetic energy. The kinetic energy formula is presented and its various uses are discussed.

The Power Video Tutorial discusses the concept of power and distinguishes it from work. The meaning of a power rating is explained and related to work and time. The equation relating power to work and time and to force and velocity is explained and used in two examples.

The Mechanical Energy Video Tutorial explains what mechanical energy is, why it is important, and how to determine the amount of it. Numerous examples and illustrations assist in the explanations.

The Non-Mechanical Energy Video Tutorial explains what non-mechanical energy is and how it is different than mechanical energy. Five non-mechanical energy forms are described and examples are given of each. The emphasis of the video is on developing the skill of keeping track of energy.

The Forces, Energy, and System Analysis Video Tutorial explains the importance of a system analysis in keeping track of energy for any given motion scenario. The distinction between conservative and non-conservative forces and the relationship of each to the total amount of mechanical energy is discussed. Numerous examples, illustrations, and analogies assist in the explanations.

The External Energy Transfer Video Tutorial conceptually and quantitatively describes the changes that occur in the system's energy when net work is done on it by a non-conservative force. Numerous example problems are given and solved.

The Mechanical Energy Conservation Video Tutorial explains what is meant by mechanical energy conservation and the conditions under which mechanical energy is conserved. Mechanical energy conservation is contrasted with situations in which energy is transferred across the boundary as a result of external forces doing work. Numerous examples, illustrations, and animations assist in the explanations.

The Work-Energy Bar Charts Video Tutorial explains what a work-energy bar chart is and discusses how to construct one. Five examples are done to illustrate the method of constructing work-energy bar charts.

The Work-Energy Practice Problems Video Tutorial focuses on the use of work-energy concepts to solve problems. After providing a background and a short strategy, Mr. H steps through detailed solutions to six example problems involving work and energy. Learn how to use the concepts to solve for speed, height, and distance.