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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
    w=fd

    p=w/t
    3. The attempt at a solution
    w=6f
     
  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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