1. The problem statement, all variables and given/known data Mass 1 (2.0kg) sits on top of mass 2(5.0kg), which rests on a frictionless surface. The coefficient of static friction between mass 1 and mass 2 is 0.30. A string of length 5.0m is tied to mass 2, and both masses are swung around in a horizontal circle. Calculate: a) The maximum speed of the masses b) The tension in the string 2. Relevant equations Fc= mv^2/r 3. The attempt at a solution I assumed that since there is no vertical motion, the Fc would be the tension in the string. So, i added both masses to make a system diagram of one block with both masses. Then, when I tried to solve for the maximum speed, I was stuck with 2 unknowns, Fc, and Ftension. I think we should make two equations and subsitute into the other and solve for one variable, but im not sure. Can someone please help me, and work through this problem with me?