Work is done against friction which causes heating of the two surfaces - so the internal thermal energy of the surfaces increases. Adding lubricant between the surfaces reduces this friction and so less heat is wasted, like the inside of a car engine. Recently, LED light bulbs have been introduced to replace filament lamps, as they are much more efficient.
Using these causes less energy to be wasted as heat. Energy is usually lost by heating up the surroundings though sometimes energy is dissipated as sound. The ways in which energy is dissipated depends on the system:. Energy dissipation No system is perfect. Examples of dissipation Energy is usually lost by heating up the surroundings though sometimes energy is dissipated as sound.
Learn more. Energy dissipated by friction vs Work done by friction Ask Question. Asked 3 years, 7 months ago. Active 1 year, 1 month ago. Viewed 5k times.
Improve this question. For all intensive purposes, you can say that work and change in energy are the same thing. The change in energy due to friction is calculated identically to the work done by a force acting over a distance. Add a comment. Active Oldest Votes. Improve this answer. John Darby John Darby 3, 2 2 gold badges 8 8 silver badges 14 14 bronze badges.
Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. Featured on Meta. Now live: A fully responsive profile. Related 6. Hot Network Questions. Question feed.
0コメント