8-P2. A slender rod AB, of weight W, is attached to blocks A and B, which move freely in the guides shown. The blocks are connected by an elastic cord that passes over a pulley at C. (a)Express the tension in the cord in terms of W and 0. (b) Determine the value of 0 for which the tension in the cord is equal to 3W.

Fig: 1

Fig: 2