# Is a reference frame fixed (without rotation) on a precessing gyroscope an inertial frame of reference?

Let's say we put a human in a closed chamber which is going around a certain point at distance d from its center of mass at some angular velocity w. The centrifugal force on a human will be w squared over r times his mass. Is there any difference if the cause of this rotation is precession of a gyroscope connected to the chamber?

• It is unclear what you are asking. You seem to be mixing the effects of orbital motion with that of rotation. The short answer is that if the center of mass is not moving in a straight line, there must be a force that causes that. Can you elaborate a little more on the setup (maybe include a sketch) and describe the DOF that drive the kinematics of the system. – ja72 Mar 8 at 17:45
• Doesnt matter what force. Of course there is a force. Do you not know what precession is? – Schaurberger Mar 8 at 18:01
• In my mind precession is the slow rotation of the instantaneous rotation axis when it is not parallel to one of the principal rotation axes. – ja72 Mar 8 at 18:51
• Yes. Slow relative to the rotation right? So doest really rave to be slow. I added a picture. – Schaurberger Mar 8 at 19:13
• So if you fix a reference frame at the end of the gyroscope, and the frame is not itself rotating, only precessing, how many Gs of force will the person inside feel? – Schaurberger Mar 8 at 19:14