1. The problem statement, all variables and given/known data A 4.05 kg object is attached to a vertical rod by two strings as in Figure P6.11. The object rotates in a horizontal circle at constant speed 6.50 m/s. http://www.webassign.net/pse/p6-11.gif (a) Find the tension in the upper string. (b) Find the tension in the lower string. I have no idea where to begin. Any thoughts?