- #1
Stenn
Homework Statement
This is finding net force on Q3.
I was taught by my Physics teacher to always get angle from the Positive side of x-axis (+X-Axis).
For example in the above situation, if the angle is -30deg from the +x-axis (assuming the Q3 is the origin),
Why is F31 x-component = 140 N cos(360-30) NOT the case?
I mean I considered that in getting angles it should ALWAYS come from the +X-Axis
I think now, if the above x-y components are correct. then the cartesian plane (Q3 Origin) is turned upside down
Now, what's not clear to me is that. When does a Cartesian plane mirrors/turns upside down?
OR is the above situation false?
2. Homework Equations