Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Unit kN? What is it?

  1. Oct 26, 2004 #1
    Unit kN???? What is it???

    I have a question asking for the tension in a cable that supports a beam. It asks me to find the answer in kN.

    What is kN? I know how to solve the problem, but I have no idea what this unit is.....What is k?

    Figure at the bottom in an attachment.

    For the record the question is a torque problem, with given mass values for a beam and two weights in kilograms, as well as the theta value (39 degrees) in tension. I'm assuming I multiply gravity times the mass to get the weight, so that this equation works.

    Weight1 X (Length/2) + Weight2 X (Length) + Weight3 (aribitrary distance) = Length X Tsin(39)

    This equation has proved correct in a quiz, and it has been explained to me by several profs. However, when I try to apply it to find the answer in kN....I get the wrong answer. Am I converting the weight wrong or is it something else? I realllly need help on this guys :).
     

    Attached Files:

  2. jcsd
  3. Oct 26, 2004 #2
    kN is KILO newtons (x10^3) newtons
    in most cases something like m, d, D, preceeding N where N is newtons for force, then its usually a smaller unit
     
  4. Oct 26, 2004 #3
    So if I had an answer like 1054.47 N, it would be 1.05447 kN????
     
  5. Oct 26, 2004 #4
    yes thats right
     
  6. Oct 26, 2004 #5
    Thanks a lot stunner!
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook