......
where:
......
Some questions about the formula/diagram:
- LWBN and LT do seem to have the same direction, whereas I would expect the LT to be downward in the diagram, otherwise the sign in the formula should be different. Just like TZT and TZD do have different signs in the formula. So, I think, it works out fine, though it's confusing.
- The Datum location is irrelevant for Moment calculation, as long as there is no rotation, though once rotation sets in, it needs to be in the rotation point, to let the Moment calculation work. The formula does suggest a general purpose validity, and does not suggest a zero angular velocity/acceleration. Correct ?