# Torque (changing reference frames and adding)

Hello there

I have 2 questions:
1. Can one change the coordinate system of torque vectors through a homogeneous transformation matrix with both rotation and displacement?

2. What's the procedure to add two torque vectors about different axes?

João

A.T.
1. Can one change the coordinate system of torque vectors through a homogeneous transformation matrix with both rotation and displacement?
Use just the rotation part to transform the torque vector. The full transformation with displacement must be applied to transform the point around which the torque acts.

2. What's the procedure to add two torque vectors about different axes?
The get the net torque acting on an object you just add them, regardless around which axis they act.

Thank you! That was a quick reply!
So if I add the two torque vectors, the result will be the net torque about what point?

A.T.