1 / 10

Classical Mechanical Energy

Classical Mechanical Energy. Kevin Choe. What is the Mechanical energy?. Gravitational Potential Energy Kinetic Energy Total Mechanical Energy Demo Derive equation Problem Solving. Potential energy. T he stored energy of position possessed by an object Equation PE = mgh

hachi
Télécharger la présentation

Classical Mechanical 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. Classical Mechanical Energy Kevin Choe

  2. What is the Mechanical energy? • Gravitational Potential Energy • Kinetic Energy • Total Mechanical Energy • Demo • Derive equation • Problem Solving

  3. Potential energy • The stored energy of position possessed by an object • Equation • PE = mgh • Unit of Potential Energy • (kg)(m/s2)(m) = (kg)(m2/s2) = J

  4. Kinetic Energy • Energy of motion • Equation • KE = 1/2mv2 • Unit of Kinetic Energy • (kg)(m/s)2 = (kg)(m2/s2) = J

  5. Example (Falling Ball)

  6. Graph of the experiment

  7. Total Mechanical Energy • What do you see in terms of deriving an equation? • KEi+PEi= KEf+PEf • (1/2mvi2) + (mghi) = (1/2mvf2) + (mghf)

  8. Problem • What is the speed of the object right before hitting the ground? • Derive Vbottom equation from the Total Mechanical energy. (KEi+PEi = KEf+PEf) • Play simple algebra

  9. Calculation • KEtop+PEtop = KEbottom+PEbottom • (1/2mvtop2) + (mghtop) = (1/2mvbottom2) + (mghbottom) • (mghtop) = (1/2mvbottom2) • (ghtop) = (1/2vbottom2) • 2ghtop = vbottom2 • vbottom = Sqrt(2ghtop)

  10. Source • http://www.physicsclassroom.com • http://www.citejournal.org/vol4/iss3/science/article1.cfm

More Related