The bridge has a length of 1,000 m = 1 km. The bridge has a handrail for the pedestrians. During hot weather, the metal used in the handrail, slightly expands, so that the length of the handrail will increase by 2 cm in total. When the handrail expands, it buckle at its central point. What would be the vertical raise of the central point of the handrail? Figure-1: Diagram of a long bridge with handrail in unstretched (blue) and stretched/buckled (red) configurations