Solve the below problem:
Q: A 525-mm-long uniform rod AB has a mass of 3 kg and is attached to a ball-and-socket joint at A. The rod rests against an inclined frictionless surface and is held in the position shown by cord BC. Knowing that the cord is 525 mm long, determine
(a) The tension in the cord,
(b) The reactions at A and B.
