Jeebs ,
I am not talking about the sharpening of the blades of the knife edges, that is done so that the "point" (actually line) of suspension of the rod remains the same, otherwise a blunt end would cause the rod to swing in a slightly 'distorted' fashion as the position of point of suspension...
I am not able think of convincing answers to the following questions-
1.Why the distance between knife edges (when the time periods about them is approx same) is considered equal to the length of an equivalent simple pendulum ?? It will be great if you can derive it...
2. Why the ends of the...