An Aluminium object is made of a solid cone of height ‘h’ and base diameter D attached toa solid cylinder of diameter D and height ‘$$\frac{h}{2}$$’ as shown in figure. It is kept inclined touching to a vertical wall at point ‘A’ and hinged at. point B cr the floor. The object stays in this inclined position without going to vertical position (axis. perpendicular to the floor), only if. $$\theta$$ is less than