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Energy Transfer Question

  1. Aug 7, 2012 #1
    1. The problem statement, all variables and given/known data
    Propose an explanation for the following fact. Include a description of the energy transfers that would take place when the lift starts and stops.

    A fully loaded chairlift requires more energy to start then it does to maintain motion.

    3. The attempt at a solution
    I thought that perhaps it takes more energy in the beginning because the chairlift has inertia and is resisting the change. You need to apply more energy to get over this initial inertia.

    I'm having a hard time including energy transfers....

    I know that when the lift starts riders gain gravitational potential energy, which eventually turns into kinetic energy on the way back down the hill..

    Thank you !!
  2. jcsd
  3. Aug 7, 2012 #2


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    When it's running at constant speed it's giving mass additional PE at a rate that depends on the speed.

    But it has to get to that speed first so...
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