A gate 4.00 wide and 2.00 high weighs 530 . Its center of gravity is at its center, and it is hinged at A and B. To relieve the strain on the top...

A gate 4.00 wide and 2.00 high weighs 530 . Its center of gravity is at its center, and it is hinged at A and B. To relieve the strain on the top hinge, a wire CD is connected as shown in the figure . The tension in CD is increased until the horizontal force at hinge A is zero