Part A The 4.00 kg block is attached to a vertical rod by means of two strings. When the system rotates about the axis of the rod, the strings are extended as shown in the What is the tension in the lower cord? (Figure 1) and the tension in the upper string is 90.0 N. Express your answer with the appropriate units. HA 6 0 (2 ? Tlower = Value Units Submit Request Answer Figure