An iron bar of weight W is having its one end on the ground and the other on the shoulder of a man. The rod makes an angle alpha with the horizontal. What is the weight experienced by the man? If the same iron bar were balanced by two men, what will be the be the weight of the bar as experienced by one of the men at the instant the other man lets go of the bar? Can someone please give me an idea of how to do these two problems? thanks for your time.