1.
An elevator weighs w and it is supported by a D diameter cable, L long.  When the elevator
carries a W load, the cable elongates ?L more.  What is the modulus of elasticity, E , of the
cable?  Given: w = 15 kN, D = 20 mm, L = 175 m, W = 6.6 kN, and ?L = 25 mm
An elevator weighs w and it is supported by a D diameter cable, L long. When the elevator
carries a W load, the cable elongates ?L more. What is the modulus of elasticity, E, of the cable?
Given: w = 15 kN, D = 20 mm, L = 175 m, W = 6.6 kN, and ?L = 25 mm
Solution
E=(F/A)/(dL/L)
=(21.6*10^3/Pi*r^2)/(25/175000)
=4.8*10^11