1. The problem statement, all variables and given/known data So referring to this lab , http://static3.mbtfiles.co.uk/media...ureate/physics/824297/html/images/image12.png In this lab you are holding the plastic tube and twirling it to make the small mass spin in a circle. Keep in mind there is a mass on the bottom. I have to create an expression for Fc with theta and radius. 2. Relevant equations Fc = 4pi^2rf^2 * m 3. The attempt at a solution Well from the FBD of the small mass, we know that FC = FT and from the FBD of the mass at the bottom we know that FT=FG. Therefore for the system, wouldn't FC = FG of the mass on the bottom? As for the equation i am not really sure were to start, could someone help me out please.