[Ether]

Originally Posted by FrankJ

Centrifugal force (or centripetal depending on your point view) Depends on tangential velocity not RPM.

It depends on both.

F = mv²/r .... or .... F=mrω²

Centripetal acceleration:

20" at 120mph = 11,330 m/s² ....... 8" at 5000 rpm = 27,854 m/s²

see attached Motorcycle vs Shooter Wheel centripetal acceleration calculator