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What is kg wt?

  1. May 6, 2010 #1
    i know its a unit for force... i'm intrigued by the relation 1kgwt=9.8N?

    by dimensional analysis

    L.H.s [M2L1T-2 {since wt=kgm/s2}
    R.H.S [M1L1T-2
    i understand i'm wrong somewhere, but i'm not able to figure it out, so pls help me :)

    Also how to get the relation between both.( think 9.8 is the contribution of 'g')
     
  2. jcsd
  3. May 6, 2010 #2

    D H

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    You interpreted kg wt as mass*weight. A kilogram weight is a unit of force. Specifically, it is the force needed to make a mass of 1 kg accelerate by 9.80665 m/s2.
     
  4. May 6, 2010 #3
    yes

    and how to get the relation 1kgwt=9.8N mathematically.
     
  5. May 6, 2010 #4

    D H

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    You can't derive it. The kilogram-force (sometimes called the kilogram-wt) is defined as the force needed to make a one kilogram of mass accelerate by 9.80665 m/s2.
     
  6. May 6, 2010 #5

    jack action

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    1 kgwt means the "weight of a mass of 1 kg on earth". So:

    W = ma = (1 kg)(9.81 m/s²) = 9.81 N = 1 kgwt

    kgwt is an arbitrary defined unit for force, just like 1 lb = 4.448 N
     
  7. May 8, 2010 #6
    Thanks for ur explanation now i understand
     
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