Energy, Work and PowerA series of free High School Physics Video Lessons from Brightstorm online Physics series..
Energy Energy is best defined as the properties of an object that enables it to do work. Energy is a scalar and is usually measured in Joules. Energy is neither created nor destroyed but shared within a system, according to the law of conservation of energy, but energy can be changed from one form to another. Types of energy include potential energy, kinetic energy and mechanical energy.
Work - Energy Theorem According to the work-energy theorem, the net work on an object causes a change in the kinetic energy of the object. The formula for net work is net work = change in kinetic energy = final kinetic energy - initial kinetic energy.
Power Power is the rate at which work is done. It is related to energy, which is the quantity used to measure work. Power can be calculated by the ratio power = work / time and is usually measured in Watts (1 Watt = 1 Joule/second).
Custom Search
We welcome your feedback, comments and questions about this site - please submit your feedback via our Feedback page. © Copyright 2005, 2009, 2010 - onlinemathlearning.com Embedded content, if any, are copyrights of their respective owners.
|
Custom Search