2. The Foucault pendulum in the M88 stairwell is made from a 12 kg brass sphere suspended from a 50 ft. cable with a period of around 8 seconds. a. Draw a free-body diagram for the brass sphere at: i. at its lowest point ii. at its highest point b. A group of students studying the pendulum sketched their prediction of the tension in the cable as a function of the angle the cable makes with respect to vertical. What feedback would you give them to improve their graph? Tension 117N an le 0 deg g