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Physics problem on power involving escalators

  1. Feb 2, 2014 #1
    1. The problem statement, all variables and given/known data

    An escalator at a mall lifts passengers 6m. The escalator has to be able to lift 50-75kg people at one time up the lift. The time to make it to the top is 40s. What must the power rating of the escalator be?

    2. Relevant equations

    3. The attempt at a solution
  2. jcsd
  3. Feb 3, 2014 #2

    Simon Bridge

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    Please show your reasoning and your working.

    When people get lifted up by the escalator, some energy changes: what kind?
    This energy has to be supplied to the lift - power is the rate of change of energy.
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