1 / 9

Law of Conservation of Energy

Law of Conservation of Energy. Energy cannot be created nor destroyed. Law of Conservation of Energy. Total energy before = total energy after KE i + PE i = KE f + PE f. 5 kg. Example #1. 8 m. Potential Energy (gravitational). PE = m g h. PE = 392 J. PE = 294 J. PE = 196 J.

mira
Download Presentation

Law of Conservation of Energy

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Law of Conservation of Energy Energy cannot be created nor destroyed

  2. Law of Conservation of Energy • Total energy before = total energy after • KEi + PEi = KEf + PEf

  3. 5 kg Example #1 8 m

  4. Potential Energy (gravitational) PE = m g h PE = 392 J PE = 294 J PE = 196 J PE = 98 J PE = 0 J 5 kg Find the PE at each red dot 8 m

  5. PE = 392 J PE = 294 J 392 J PE = 196 J 392 J PE = 98 J 392 J PE = 0 J Total Energy (PE+KE) 5 kg 392 J KE = 0 J KE = 98 J 8 m KE = 196 J KE = 294 J KE = 392 J 392 J

  6. Example #2 PE = 392 J What is the velocity of the rock at the bottom of the hill? KE = 0 J V = 2KE m 5 kg V = 2(392 J) 5 kg v = 12.5 m/s PE = 0 J KE = 392 J 8 m

  7. Energy Song Picture this a penny, Atop a hill and ready, It’s not moving it’s steady, Potential Energy. (Chorus) And now the penny’s rolling Kinetic it’s a growing Potential it’s now lowering Conserving Energy (Chorus) Falling, falling faster It is not hard to master The idea of this transfer to Kinetic Energy (Chorus)

  8. Reflect • Write a statement that will help you to remember the relationship between Potential energy and Kinetic energy.

  9. Rube Goldberg Energy Transfer • http://www.youtube.com/watch?v=_ve4M4UsJQo • http://www.youtube.com/watch?v=qybUFnY7Y8w

More Related