A lift of mass ′m′ is connected to a rope which is moving upward with the maximum acceleration ′a′. For maximum safe stress, the elastic limit of the rope is ′T′. The minimum diameter of the rope is (g= gravitational acceleration):
a. [2m(g+a)/πT]¹/²
b. 2[m(g+a)/πT]¹/²
c. [m(g+a)/2πT]¹/²
d. [m(g+a)/πT]¹/²
