How do you solve this problem?

How fast (in rpm) must a centrifuge rotate if a particle 9.00cm from the axis of rotation is to experience an acceleration of 115,000 g's?

3 answers

115000g=w^2 * r

you know g, r, solve for w (in radians per second). Convert that to rpm
I am confused, can someone show me how to work this problem? I really need help!
How do you work this problem out??