The A-36 steel boll is tightened within a hole so that the reactive torque on the shank AB...

The A-36 steel boll is tightened within a hole so that the reactive torque on the shank AB can be expressed by the equation t = (kx2) N • m/m, where .v is in meters. If a torque-of T = 50 N • m is applied to the bolt head, determine the constant k and the amount of twist in the 50-mm length of the shank. Assume the shank has a constant radius of 4 mm.