A water trough of semicircular cross section of radius 0.9 m consists of two symmetric parts hinged to each other at the bottom, as shown in the figure. The two parts are held together by a cable and turnbuckle placed every 3.75 m along the length of the trough. Calculate the tension in each cable when the trough is filled to the rim.
What is the horizontal force acting on the curved surface of an object?