Newbie here who would really appreciate some advice!

I'm developing a machine to emulate G-Force but within a defined area

therefore i need to now what forces are at play and what is required to sustain for example 1G or 2G upto a 5G range.

If this was a confusing question please let me know to try and clarify. But basically its an object going around a circle at velocity (same as a gravitron when the show comes to town.). I need paramters of;

Speed with what radius would be required to exert the G-forces required to simulate using a mass of approx 200kg (80kg person and 120kg for the frame). trying to aim for 120-240Rpm and a radius of approx 8 metres.

If U know the Formula I would love to hear from U.

Any and all help appreciated.

Regards

Golith