A 50 kg traffic light is suspended above an intersection by a continuous steel cable. The cable has a diameter of 1.0 cm, and the light is depressed 12 degrees below the horizontal. What is the percentage increase in the length of the cable due to the mass of the traffic light?
Strain=Change in length/original length
Young's elastic modulus(E)=Stress/Strain
Area = (pi) x (r^2)
E for steel is 200 x 10^9
The Attempt at a Solution
Well I found the stress and strain, but now I am lost.