Inquiries on Vacuum Sphere: Spinning and Weight Difference

[SPS]

Hi to you all,

May I just say I am not a physicist or the like so my questions may seem a bit green to you all, I wish to make something and need a little bit of info please.

With regards to a vacuum sphere, if I was to spin an item within it would it spin freely or would there be forces against it? Second silly question, does an item within the sphere become any lighter/heavier or no difference?

I hope the questions are worthy of a reply

Kind Regards

Steve

 

[pantaz]

The vacuum will reduce aerodynamic drag, but that's all (assuming the sphere remains on Earth). You still have to deal with friction from the bearings supporting your spinning object.
A vacuum has no effect on gravity, so the relative weight of your object will not change.

 

[SPS]

Thanks Pantaz for your reply, I am hoping i may be able to use opposing magnets to reduce the weight of my spinning object

Regards

Steve

 

[pantaz]

Magnetic bearings will reduce (but not eliminate) friction. Weight will be unchanged.