If mass A and B are both 2.5 kg, the fulcrum is located 1.0 m to the right, mass B is located at 2.0 m to the right, and the bar has a mass of 4.0 kg, where must mass A be located on the bar in order for the initial torque to be 0.0 Nm?
a. 0.6 m to the left of the fulcrum
C. 0.6 m to the right of the fulcrum
b. directly above the fulcrum
d. 0.2 m to the left of the fulcrum