Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Energy Transformation equation for a free fall

  1. Oct 25, 2006 #1
    One of the discussion questions in a lab I did which was basically a free falling object where the kinetic and potential energies were measured. It asks what is the energy transformation equation for a free fall (1-step transformation).
    Is it just:
    Total Energy = Potential gravitational energy + Kinetic energy
    Et= mgh + mv2/2

    Then just cancel out the mass or am I going in the total wrong direction with this?
  2. jcsd
  3. Oct 25, 2006 #2


    User Avatar
    Homework Helper

    Total energy is conserved, which means that mgh + 1/2 mv^2 = C, where C is a constant. Use the equations for h(t) and v(t) for a free fall and plug them into the energy equation to convince yourself that energy is constant for every moment t.
    Last edited: Oct 25, 2006
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook