Your challenge is to use the force table to experimentally determine the unknown mass of an object. 1) Attach the unknown mass to one mass hanger and position its pulley at 0.0. The unknown mass represents one of the forces on the force table. 2) Balance the weight of the unknown mass with two forces, F and F2, similar to the previous activity. a. Adjust the angles and the magnitudes of F1 and F2 until the force table is balanced. b. F1 and F2 should be at least 50.0 apart. Saving F Fing unknown mass F, Figure 2-5: The force table set up to determine unknown mass. 3) When the force table is balanced, the vector sum of F1, F2, and the weight of the unknown mass is 0. Use this fact to determine the weight and then the mass of the unknown mass. 4) Use the electronic balance to measure the actual mass of the unknown mass. How well did you do? Calculate the percent error for the mass of the unknown object.