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Homework Help: Roller Coaster Energy

  1. May 30, 2013 #1

    Hi, I am calculating energy (if there were to be no energy lost due to friction, etc) for this roller coaster.

    I understand that at point A there is only GPE and that at point E there is only KE.
    I was wondering if there would be both KE and GPE at point B and C.
    Would there be both KE and GPE at point D as well?

  2. jcsd
  3. May 30, 2013 #2

    Simon Bridge

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    The car has gravitational potential energy at all points - including at E.

    At E you are arguing that the GPE lost dropping from the height at A to the height at E as been turned into additional kinetic energy. So, you use the same argument for all the other points.
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