- #1
paddles069
- 4
- 0
Hi, having trouble determining the convention for determining the orientation of the principal axes.
(Please refer to the attached file for a diagram of my question)
So in Q1, theta = -19 degrees and the principal axes is rotated one of the following the conventions (from what I can tell):
1 - clockwise is negative or,
2 - angle starting from positive z axis going towards positive y-axis is negative
In Q2 however, theta = -12.15 degrees but the principal axes is rotated following one of the following conventions:
1 - counterclockwise is negative
2 - angle starting from positive z axis going towards positive y-axis is negative
Am I missing a convention here? Why do the two problems follow opposite conventions?
(Please refer to the attached file for a diagram of my question)
So in Q1, theta = -19 degrees and the principal axes is rotated one of the following the conventions (from what I can tell):
1 - clockwise is negative or,
2 - angle starting from positive z axis going towards positive y-axis is negative
In Q2 however, theta = -12.15 degrees but the principal axes is rotated following one of the following conventions:
1 - counterclockwise is negative
2 - angle starting from positive z axis going towards positive y-axis is negative
Am I missing a convention here? Why do the two problems follow opposite conventions?