A uniform rod of length L and weight W is placed on a fulcrum a distance of 0.4L from the left end. On the left end is placed a mass of weight 2Wand on the right end a vertical force F is applied to keep the system in balance. What are the magnitude and direction of the force F?
Select one
a. 7/6 W, up
b. 4/3 W, up
c. 4/3 W, down
d. 7/6 W, down