2. (30 pts.) The spring of modulus k = 900 N/m is stretched a distance s = 60 mm when the mechanism is in the position shown. Calculate the force Pain required to initiate rotation about the hinge axis BC, and determine the corresponding magnitudes of the bearing forces which are perpendicular to BC. 135 mm k = = 900 N/m 55 mm 165 mm B 90 55 mm mm P A 135 40 mm mm 45 mm 45 mm D