A 0.120-kg ball attached to a 0.25-m rod of very small inertia moves in a vertical circle in such a way that its speed remains constant. Let T1,T2,T3, and T4 be the tensions in the rod at positions 1, 2, 3, and 4 in (Figure 1) .A 0.120-kg ball attached to a 0.25-m rod of very sa) Rank the tensions in order of magnitude. (T1, T2, T3, T4)b) What rotational speed is required at position 3 to keep T3 barely greater than zero?c) At that speed, what is the tension at position 1?