Centripetal and centrifual force reactions on objects?

[TitonV]

What would the centripetal and/or centrifual force be, on an object that was traveling in a 10mi circle at 18,000 mi/hr?

OR

how heavy would a person feel riding in a train traveling on the inside of a 10 mi round tube at 18,000 mi/hr?

 

[LowlyPion]

What would the centripetal and/or centrifual force be, on an object that was traveling in a 10mi circle at 18,000 mi/hr?

OR

how heavy would a person feel riding in a train traveling on the inside of a 10 mi round tube at 18,000 mi/hr?

Welcome to PF.

What formulas do you think apply for centripetal forces?