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Finding out potential energy

  1. Sep 10, 2014 #1
    A meter scale of mass m initially vertical is displaced at 45 degrees keeping the upper end fixed.
    . find out the change in potential energy.
  2. jcsd
  3. Sep 10, 2014 #2


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    Found it. What is your attempt at a solution? And what are the relevant equations ?
  4. Sep 10, 2014 #3
    change in potential energy=mass*acceleration due to gravity * change in height
    I cant get the change in height
    here change in height is given as (l/2)(1-cos45)
    Can u tell me sir!
  5. Sep 10, 2014 #4


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    Try making a drawing. Remember that it's the change in height of the centre of mass that matters.
  6. Sep 10, 2014 #5
    I want to say, that I think you have to break it down into its x and y components
  7. Sep 10, 2014 #6
    sir i got it !!

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