7. A 21.0 kg sign hangs down at an angle of 24.4 from a vertical wall by way of a cable attached at a point higher up the wall. The cable and the top of the sign are held horizontally from across an alleyway by a large horizontal spring attachment. (Assume the cable and the spring are massless.)

(a) What is the tension in the cable? (b) What is the spring constant of the spring if it is extended horizontally by 15.0 cm?

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The tension in the cable is 189 Newtons To calculate the spring ... View the full answer