//(Power Screws) Example 6.1
//Number of threads n
n = 2
//Load to be raised W (kN)
W = 300
//Nominal diameter of the screw d (mm)
d = 100
//Pitch of the screw p (mm)
p = 12
//Coefficient of friction at the screw threads mu
mu = 0.15
//For ISO Metric Trapezoidal threads theta (degree)
theta = 15
//Neglect collar friction