Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and the Yahoo Answers website is now in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.

How do I calculate the resultant of moments?

http://i.imgur.com/3xavLvE.png?1

What is the resultant moment of the original force-couple system about the point D?

I also know that the moment produced by the force P about the point D is 37.23 kNm, I'm not sure if this piece of information is necessary, though.

Thank you.

1 Answer

Relevance
  • ?
    Lv 7
    7 years ago

    If U are correct in that the moment of P about D is: 37.23 kN CCW

    then

    The force F has its line of action thru D so there's no moment of F about D

    The moment of 50 kN-m about B is the equivalent of: a force of (50 kN-m)/3 m or = 16.67 kN acting at point o, in a direction of 90° to the line B-o in such a way as to give a CW torque at B.

    This 16.67 kN force acting at o would then have a moment about D of:

    16.67 kN (cos 45°) • 2 m = 23.57 kN-m CCW

    The resultant moment about D = (37.23 + 23.57) kN-m CCW = 60.8 kN-m CCW ANS

Still have questions? Get your answers by asking now.