If you were spinning clockwise within another sphere spinning counter-could you remain still?

Question

I'm thinking of the mechanisms used to test g-forces on pilots, but instead, in a frisbee-like structure (like a space station), which is then surounded by another similar structure spinning alternately and accounting for the differences between the two structures to compensate for speed. Could there be practical uses for propulsion?

Answer 1

Perhaps. But you would also have to take into account air resistance, friction, inertia of the disks, etc. Even if you could account for this, it would still be near impossible to accomplish this idea of yours.

Answer 2

Newton’s Second Law of Motion:

The relationship between an object's mass m, its acceleration a, and the applied force F is F = ma. Therefore, the rate of change of momentum of an object is proportional to the resultant force acting on the object and is in the same direction.

Centrifugal force is a manifestation of an object accelerating about an axis on two dimensions, instead of in one dimension, linearly. Remember that acceleration isn’t just a change in velocity, it can also be a change in direction. So, as the object (m) is traveling about the axis (a), the force keeping it on that path must be greater than the object’s tendency (inertia) to resist angular acceleration (F).

This equation is not affected by the force, mass or velocity of external objects which do not directly act upon the variables of the equation. There’s no reason to have one sphere spinning within another sphere or whatever. The two spheres would have no effect on each other in the manner in which you are describing.

Also, the centrifuge that pilots sit in is just a chair attached to an arm that spins around in circles. It’s no different than an amusement park ride. The room that the centrifuge sits in is firmly planted on its foundation.

Answer 3

You need to define "still" in the context of relative motion.
Would you be allowed to not change center of mass while constantly spinning yourself or would you need to always face the same external point.

If the mechanism were in orbit around a larger body, would it wobble?

Gyroscopic forces are complex and may not be completely understood even yet. You may want to look up the hypothesis of Joseph Newman.

Answer 4

Using classical Newtonian Physics the answer is no. They should not interfere in theory.

Answer 5

both are moving,thats like asking if the sphere would be moving