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kN/m2 to kg/m2

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  • kN/m2 to kg/m2

    How does kilonewtons per sq metre translate to kilograms pr sq metre? This relates to loading of a roof.
    Any advice appreciated

  • #2
    Re: kN/m2 to kg/m2

    Originally posted by roger View Post
    How does kilonewtons per sq metre translate to kilograms pr sq metre? This relates to loading of a roof.
    Any advice appreciated
    A kilonewton is 1000 N and a unit of force. At standard gravity (9.80665 m/s), the force exerted on a 1 kg mass is 9.80665 N. So at standard gravity, the force on a mass of 101.972 kg is 1000 N or 1 kN.

    I keep belaboring the point of "standard gravity" because gravity does vary slightly from equator to pole and with elevation above sea level, and the force acting on a mass changes (slightly) with changes in local gravity. At sea level, that change is around 0.5%, more with elevation.

    However, with modest rounding, the force of gravity on earth acting on a 102 kg mass is 1 kN, at least close enough to give a feel for it.

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    • #3
      Re: kN/m2 to kg/m2

      Excellent answer John, hope questioner was happy with it

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